Looking for a top JavaScript developer in Boston?

If you're hiring a JavaScript developer to help you build or update a website that's responsive and interactive, consider the pros and cons of JavaScript as a programming language. Advantages include its speed because it's executed on the client-side; reduction in server load; and diverse functionality. Disadvantages to consider include security such as bugs on the client-side.

To assist you in your search for a partner, we’ve compiled this list of the top JavaScript development agencies in Boston. Browse descriptions, feedback, and awards to find which can best suit your company’s needs. If you need more support, tell us about your project, and we'll match you with recommended companies.

List of the Best Boston JavaScript Developers

  • 1
    $75,000+
    50 - 249 Employees
    Amesbury MA

    Imarc is a full-service digital agency founded in 1997 and headquartered in Amesbury, Mass. Their team of around 40 employees includes engineers, designers, and marketing experts. They specialize in web design, web development, and custom software development.

    Clients
    JetBlue
    Texas Instruments
    Everbridge
    Notable Project

    Imarc did a custom redesign of a site for a healthcare nonprofit. They worked with the client to develop a model for the site and built it using CraftCMS to meet the client’s security requirements. The clients were pleased with the new site. 

    “The changes were instantaneous and received positive feedback from clients, sponsors, and our hospital colleagues. The site is professional and makes our branding more cohesive.” – Biz. Dev. and Com. Manager, Healthcare Nonprofit

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  • 2
    $10,000+
    50 - 249 Employees
    Rutland MA

    Scopic is a software development and creative digital marketing company from Boston. Founded in 2006, their team consists of over 280 developers, designers, and marketers from around the world.Their services include web, mobile, and desktop development, as well as digital marketing services such as SEO, content marketing, and social media marketing.

    Clients
    RokketMed
    GorillaWorkout
    Teamly
    Industries
    Notable Project

    Scopic’s team enhanced a woodworking software firm's overall online presence through careful evaluation of the company’s target audience. They created search engine optimized social media profiles, design templates, and produced consistent and effective social media posts. The team managed to grow the client's Instagram profile to 7,000 followers, resulting in higher engagement rates.

    “They have the tools necessary to communicate and manage a multi-person project team...Truly professional.” –  Founder and CEO, Woodworking Software Firm

  • 3
    $1,000+
    10 - 49 Employees
    Boston MA

    HTMLPanda, founded in 2014, is a website development company headquartered in Boston, with additional locations in Walpole, Mass., and New York City. The company’s team of 9 people focuses on web development, e-commerce development, and web design. They work with mid-market, enterprise, and small businesses for clients in the business services, IT, and financial services industries. 
     

    Clients
    Vodafone
    Intel
    Motorola
    Industries
    Notable Project

    HTMLPanda redesigned a clothing company's website on WooCommerce to improve its appearance and functionality. The site was originally on WordPress. HTMLPanda helped improve the client’s shopping cart and online store and provided any other technical support the client needed. The client was happy with the new, updated site, and the quality of the company’s work. 

    “The new site is much more user-friendly, functional and reliable. We are happy with the result, their quality of services is also very good. Sometimes I come up with ideas and they've already worked on what I was thinking of.” — Marketing Manager, Clothing Company 
     

  • 4
    $75,000+
    10 - 49 Employees
    Somerville MA

    OHO Interactive is an interactive agency that provides web development, web design, and digital strategy services located in Somerville, Mass. Founded in 1998, they have a team of about 70 employees who support midmarket clients in a few industries: education, healthcare and medical, and nonprofit. 

    Clients
    Dartmouth College
    Harvard University
    Columbia Law School
    Norwich University
    Industries
    Notable Project

    OHO Interactive designed and developed a website for a university. They later redesigned the platform, migrating the site to Drupal 8.  They conducted market research, developed brand collateral, and managed initiatives to support a successful site launch. They produced high-quality code, which results in an intuitive website.

    “They work with us through any issues and produce a good final product.” – Former Director, University

     

  • 5
    $50,000+
    50 - 249 Employees
    Marlborough MA

    Based just outside Boston, MA, Boston Technology Corporation is a leader in mobile, web, and cloud-based app development. Since starting in 2004, BTC has expanded to almost 100 employees.

    Clients
    Harvard University
    Dunkin Donuts
    Fidelity
    GreyHouse Publishing
    Industries
    Notable Project

    Boston Technology Corporation was approached by a live-streaming company to create an iOS app that brings experiences events that are happening elsewhere to their customers. They created an intuitive user interface (UI) that users love.

    “I never had to say anything more than, ‘This is what I need for my business,’ and they understood that. I think that’s very rare among even the best development teams.” – Founder & CEO, Live-Streaming Entertainment Platform

  • 6
    $100,000+
    50 - 249 Employees
    Hingham MA

    Founded in 2010, DockYard is a digital product agency in Boston that focuses on custom software, mobile and web app design and development. DockYard caters to startups, mid-market, and enterprise clients nationwide and also offer UX, staff augmentation, and training. Their 80-person team develops using Ember, Elixir, and Phoenix. 

    Clients
    Apple
    Nasdaq
    Netflix
    ZipCar
    Industries
    Notable Project

    Dockyard developed a web app for an e-learning company, from front-end development to visual design to implementation. Their work ethic, creativity, collaboration, and overall dedication to a quality product was evident to the client.

    "In talking with DockYard, we found them to be brilliant. That's one of the real strengths of DockYard. … They're a major player in the development community in Boston and the East Coast. Their reputation is amazing in terms of the contributions they make to the community." – Former Sr. Software Engineer, E-learning Provider

  • 8
    $25,000+
    10 - 49 Employees
    Boston MA

    Boston software and web development company Vermonster offers full-service design and development for applications across platforms. Prioritizing visual design and user experience, Vermonster's 20-person team has produced digital experiences for clients in sectors from medicine to education to government. With a focus on Ruby on Rails and JavaScript, Vermonster's robust development team has created web apps, desktop software, sophisticated chatbots for Facebook and Slack, and mobile apps for a number of high-profile clients.

    Clients
    McKesson
    Autodesk
    Harvard Business Review
    City of Boston
    Notable Project

    A member of the faculty at a Boston university's school of medicine worked with Vermonster to create a digital learning environment for medical students. The platform included a note-taking tool optimized for medical programs, portfolios of class material, a heat map of students, and social features to encourage collaboration. Students and professors found the platform extraordinarily helpful and hope to expand it to other medical departments.

    "They went above and beyond in terms of bringing us more features than we had initially thought possible due to our limited funding." – Faculty Member, Medical School

  • 9
    $10,000+
    2 - 9 Employees
    Boston MA

    Kevin Leary is a freelance web developer based in Boston who specializes in single page app development. With a background in Angular, data visualization, and analytical UX/UI, Kevin helps build web applications and websites for clients across the U.S. Founded in 2007, kevinleary.net creates custom WordPress themes and plugins for clients and writes code for large brands.

    Clients
    TripAdvisor
    MIT
    EMC
    Tufts Medical Center
    Notable Project

    Kevin helped a major travel agency create a blog on WordPress. The custom WordPress website included APIs that pulled information from the travel agency's main website – translations, images, hotel ratings. The client saw an increase in web traffic and was able to grow its social media audience by sharing content from the blog.

    "Kevin was responsive throughout the project. He’s been available anytime we needed him. Most of the communication was done through email or Trello for managing specific tasks and items which needed to be built." – Marketing Manager, Travel Site

  • 10
    $25,000+
    50 - 249 Employees
    Southborough MA

    AndPlus is a software product development company located in Southborough, Mass. Founded in 2009, they have 50 employees and serve companies of all sizes – from Fortune 100 companies like Bloomberg and Honeywell, to funded startups looking to launch their MVP. AndPlus focuses on creating mobile and web solutions for IoT, Big Data, User Experience, Artificial Intelligence, Machine Learning, and more.

    Clients
    Bloomberg
    Cognex
    ESPN
    Harvard School of Public Health
    Industries
    Notable Project

    AndPlus developed a web application for a risk management system for financial institutions and publicly traded companies. Throughout the development process, the team worked closely with product owners to understand the needs and develop major features and enhancements that were rolled out in the first version in 2015. AndPlus still supports the software throughout its lifecycle.

    “I was very impressed that they were flexible to change their work methodology to fit what our needs were. ... They were always willing to change everything at the drop of a dime to make sure that they satisfied our needs. We profited from that type of relationship.” – Senior Project Manager, Data Management Analytics Company

  • 11
    $5,000+
    10 - 49 Employees
    Westborough MA

    Wakefly is a digital marketing agency founded in 2002 and headquartered in Marlborough, Mass. The team of nearly 50 employees supplies clients with personalized digital marketing programs. Taking a holistic approach to digital marketing, Wakefly blends design, development, and online marketing strategies such as web development and design, SEO, and PPC.

    Clients
    Space Coast Credit Union
    CyberSheath
    Total Quality Logistics
    Saint-Gobain NRDC
    Industries
    Notable Project

    Wakefly worked with a Raleigh, NC-based technology company, to expand its online reach and increase its visibility. They restructured the technology company's website, identified the highest converting landing pages, and began a YouTube advertising campaign.

    "Wakefly built us the foundation for success online. We will now be working together to plan our next period of aggressive growth." – Marketing Programs Manager, Technology Company

  • 12
    $25,000+
    10 - 49 Employees
    Somerville MA

    Echo&Co is a primarily UX/UI agency headquartered in Somerville, Mass., with satellite offices in Louisiana, Virginia, Michigan, and British Columbia. It is a full service digital agency of about 20 employees. In addition to UX/UI, Echo&Co provides web development and product design services. The agency works primarily with midmarket businesses.

    Clients
    Museum of Fine Arts Boston
    Newseum
    NRDC
    University of Chicago
    Industries
    Notable Project

    Echo&Co provided a international medical association with more streamlined website navigation. The agency was able to quickly able to make the website more functional for the client's fundraising and marketing communications objectives. 

    "We’ve received a lot of great feedback internally [on Echo&Co's design], as well as from users who are new to the site. We have a lot of stakeholders internally who are involved with that section as it drives their conversion rates. Getting positive reactions from them was a great win for us." - Manager, International Medical Association

  • 13
    $25,000+
    10 - 49 Employees
    Boston MA

    MESH Interactive Agency is a full-service content marketing agency based out of Boston. Founded in 2006, the team of 11 specializes in advertising, branding, and content marketing. 

    Clients
    Google
    Arrow
    ECS
    Industries
    Notable Project

    MESH Interactive Agency worked on rebranding and marketing for a telecommunications company. The team helped a company rebrand to include new service offerings. They led brainstorming sessions, updated a website and its messaging, and created a HubSpot profile to run marketing campaigns. The client appreciated their dedication to the project.

    "Their team genuinely understood our project goals and adhered to our requests as meticulously as possible. They produced high-quality deliverables—including graphics and packaging for both Mac and Windows platforms—on time and at reasonable rates." — Sales and Marketing Director, Telecommunications Company

  • 14
    $10,000+
    10 - 49 Employees
    Boston MA

    Third & Grove is a web development firm headquartered in Boston with an additional office in San Francisco. Founded in 2013, they have 34 employees and have worked with well-known brands in sectors such as food & beverage and financial services. Third & Grove provides web design and development, e-commerce development, UI/UX design, and digital strategy for primarily midmarket-sized clients. 

    Clients
    World Vision
    King Arthur Flour
    Goldwin
    Benefit Cosmetics
    Industries
    Notable Project

    Third & Grove redeveloped the flagship website for a newspaper in Boston. The client needed a responsive website instead of a mobile app to keep up with their industry, and selected Third & Grove because of their preference for Drupal. Using Drupal 7, the Third & Grove team delivered an enterprise-grade site that now supports approximately half their traffic coming from mobile devices.

    "Our mobile traffic has increased. Prior to this, the experience was seeing the desktop version on your mobile device. We’re now about 50% mobile and 50% desktop and tablet." — VP of Digital Operations, Boston Newspaper

  • 15
    $25,000+
    10 - 49 Employees
    Boston MA

    Create + Conquer is a digital agency that specializes in web design and development, as well as UX/UI design and digital strategy. Based in Boston, MA, Create + Conquer is composed of fewer than 10 employees and is committed to serving mostly mid-market businesses in the business services and non-profit industries.

    Clients
    MSPCA
    Propel Marketing
    Historic New England
    Sapience
    Industries
    Notable Project

    Create + Conquer redesigned an audiovisual company's website on WordPress. The project included wireframing, developing, and testing the new site. After the site's launch, Create + Conquer assisted with marketing using social media and content development.

    "I think they’re pretty innovative. They have a great eye for design. I’ve gotten thousands of compliments on how the site looks, so I’m really pleased." – Director of Communications, Audio Visual Company

  • 16
    $50,000+
    250 - 999 Employees
    Newton MA

    Surge Software is a software development agency headquartered in Bellevue, WA, with other offices in Sacramento, CA, Baltimore, MD, and Salt Lake City, UT. The agency of 160+ employees provides custom software development, web development, mobile app development, and e-commerce development services.

    Clients
    Ralph Lauren
    Verizon
    UnderArmor
    Purdue University
    Industries
    Notable Project

    A consulting firm hired Surge Software for web development and UX work. The agency provided staff augmentation across different platforms. The consulting firm felt that Surge was responsive and that its work has been extremely valuable to the company. 

    "I’m comfortable in the knowledge that if issues arose with any team member, I could talk honestly with Surge and they would remedy the situation. Be open, articulate your goals, and they will work with you to provide solutions." – Director of Software, Management Consulting Firm

  • 17
    $100,000+
    10 - 49 Employees
    Arlington MA

    Involution Studios is a software services firm based in Arlington, Mass. Founded in 2004, the team of 13 specializes in web design and development, mobile app development, and custom software development. They focus on business services, healthcare & medical, and information technology.

     

    Clients
    Johnson & Johnson
    Walgreens
    Mount Sinai
    National Institutes of Health
    Industries
    Notable Project

    Golnvo works with a home nursing company to create the UX/UI for their web application. Apart from this, they also work on development to create an MVP.

    “They’re a small but highly efficient team.”

  • 18
    $25,000+
    50 - 249 Employees
    North Hampton NH

    Ascendle is a web and mobile development company based in North Hampton, NH. Their 150+ engineers and quality assurance specialists have been enabling digital success since 2012.

    Clients
    Creative Info Systems
    Silvercloud
    Treeno Software
    UberDoc
    Industries
    Notable Project

    After establishing an effective Agile development process, the team rapidly rewrote the client’s existing code to deliver a highly functional product platform. Ascendle earned praise for their process-driven approach and quality deliverables.

    “Over the course of 3 months, Ascendle continued to work with us, coaching our team on the Agile processes and methods necessary and made sure that we had the right platforms in place for managing our project.” – CEO, Bank Services Provider

  • 19
    $10,000+
    10 - 49 Employees
    Lynnfield MA

    Founded in 2001, Going Clear Interactive is a web design and development company based in Boston, MA. With fewer than 10 employees, GoingClear Interactive has nearly two decades of experience working with mostly small and mid-market businesses. Their services include web design, web development, and e-commerce development.

    Clients
    Harvard;University
    Sal's Pizza
    Massachusetts Port Authority
    J Derenzo & Co.
    Industries
    Notable Project

    GoingClear Interactive worked with a dental organization, redesigning its website and organizing its database. They merged two databases, resulting in a single, easy-to-use platform on WordPress. 

    "We now have a much better presentation of the information that we wanted. We can just go to a section and find what we need. Things are better organized, and we can manage our information much better." – Founder, Dental Organization 

  • 20
    $1,000+
    10 - 49 Employees
    Boston MA

    CodeToArt Technology Private Limited is a development and design company in Bibvewadi, India. Founded in 2016, they also have an office in Kalyan, India. They have a team of around 10 employees who provide mobile app and web development, in addition to UX/UI design services.

    Clients
    Appetize
    QuestaGame
    LaunchByte
    Industries
    Notable Project

    CodeToArt Technology Private Limited developed web and mobile apps for a startup firm builder. For each of the projects, they built websites and web admin platforms using a variety of technologies including Ruby Padrino, Ruby on Rails, SQLServer, and PHP and mobile apps using Swift and Java. They finished each project and even picked up on projects other vendors had left incomplete. The client was impressed by their communication skills. 

    "They were always very professional in their communication with us and with clients." – CTO, Startup Firm Builder

     

  • 21
    $10,000+
    10 - 49 Employees
    Boston MA

    The Gnar Company, Inc. is a computer software company based in Boston and founded in 2015. Their team of around 15 provides a variety of services including custom software, mobile app, and web development. They often partner mid-sized and enterprise businesses in a large number of sectors. 

    Industries
    Notable Project

    In conjunction with an emergency response manufacturer, The Gnar Company developed a mobile application and connected web presence to aid in relaying chemical safety information. The client praises them for their commitment to understanding their clients' industry and work. 

    "Our first responder community doesn’t get a lot of good apps, and they’re amazed that Gnar was able to deliver exactly what they needed without being first responders themselves." – President, First Line Technology 

     

  • 22
    $5,000+
    10 - 49 Employees
    Boston MA

    OrangeLoops is a software development company headquartered in Boston, with an additional office in Montevideo, Uruguay. The company, founded in 2015, has a team of 22 people who exclusively provide mobile app development and web development services. They work with mid-market businesses that are mostly in the advertising & marketing, health care & medical, and retail industries. 
     

    Clients
    Kezmo
    IdeaSource
    CloseNet
    Industries
    Notable Project

    OrangeLoops provided business consulting and audit services for a data reporting company. The client wanted to modernize their main product, so they hired OrangeLoops to conduct a technological audit. OrangeLoops did an analysis and conducted interviews in order to develop recommendations for the client. The client was satisfied with the report the company developed. 
     

    “It was a very top quality report. It was well-produced, structured, well-supported, and well-analyzed. It had a lot of code analysis and function diagrams.” — CTO, Data Reporting Company

  • 23
    $1,000+
    50 - 249 Employees
    Boston MA

    Alphonic Network Solutions Pvt. Ltd. is a full-stack mobile application and web development company. Founded in 2013, Alphonic Network Solutions Pvt. Ltd. currently has more than 40 employees based in Jaipur, India. They have experience in mobile app development, web app development, e-commerce, mobile gaming, online forms, database integration, and web design.

    Clients
    Bungabox
    Rajasthan Patrika
    Songdekho
    Industries
    Notable Project

    Alphonic Network Solutions Pvt. Ltd. created an educational platform, including a web app and Android app for an educational company. The platform has grown from a search engine to incorporate additional features like test preparation and higher education discovery.

    "They’re the best fit for us because they do everything on time. They’ve fulfilled all of our requirements. They have done all the changes and quality analysis work. This is why I’ve been with them for the last three years." - CEO, Educational Company

  • 24
    Undisclosed
    2 - 9 Employees
    Boston MA

    Founded in 2015, SERPCOM is a full-service digital marketing agency based in Boston, Mass., with an additional location in Quincy, Mass. With a team of 7, SERPCOM focuses on SEO, web development, and web design. The travel company appreciated that SERPCOM was proactive in proposing website upgrades, including improved security features. With SERPCOM's assistance, the travel company experienced a 100% increase in web traffic.

    Clients
    Faneuil Hall Marketplace
    The Beacon Hotel
    Gallagher Landscaping
    Industries
    Notable Project

    An international travel company partnered with SERPCOM to strengthen their online presence. Serpcom created an ongoing digital marketing strategy including platform migration, advertising campaigns, and improved SEO.

    "They’ve made everything very affordable for me as a small company from the very beginning and provided a level of scalability that I’ve been comfortable with. They’ve proved their worth and made me feel confident about increasing my marketing budget." - Owner, International Travel Company

  • 25
    $10,000+
    50 - 249 Employees
    Dedham MA

    AMC TECH is a software, electronics, and mechanics development company based in Krakow, Poland. The company, founded in 1992, has more than 50 employees and provides, among others, custom software development, IoT development, IT strategy consulting services to various companies. 

    Clients
    Alstrom
    General Electric
    Siemens
    Thales
    Industries
    Notable Project

    ANC TECH was hired by a Workplace Safety Company to provide mechanical, industrial, hardware, and software design and development services to create an emergency response system with a functional IoT system for its client companies. AMC TECH delivered an MVP after six months of development. The prototype was functional and met all requirements. After three months, AMC TECH delivered the market-ready product, which has received overwhelmingly positive feedback.

    "They have short feedback periods, a high level of professionalism, and a willingness to hear the customer needs." - CEO, Workplace Safety Company 

  • 26
    $10,000+
    10 - 49 Employees
    Boston MA

    Founded in 2001, MTC Labs is a full-service web and mobile app development firm based in Boston, MA. Proficient in everything from product design to social media strategy, this 10+ team offers a robust and award-winning skillset.

    Clients
    Harvard University
    Massachusetts General Hospital
    Partners Healthcare
    rEVO Biologics
    Industries
    Notable Project

    MTC Labs designed and developed a platform to help medical professionals access resources and submit reports. The client appreciated the team’s accommodating demeanor and flexible work ethic, as well as their deep insights into the unique solution required.

    “So far, the platform is working well. ... We have about 1,300 users. Of that group, we had maybe 500 people recertifying this year, and they all recertified without any issues.” – Director, Medical Services Company

  • 27
    Undisclosed
    10 - 49 Employees
    Cambridge MA

    Potick is a software company founded in Cambridge, Mass. in 2020 with no more than 50 employees. They offer web development, e-commerce development, and UX/UI design services for small and mid-market businesses alike.

    Clients
    The Infinite Mind - Dementia Project,
    Hooga Homes and Gardens
    Alama Foundation
    Industries
    Notable Project

    Potick provided digital marketing and web solutions for a nonprofit. The nonprofit lacked an internal marketing team and needed a scalable partner to work with. Potick has so far provided satisfactory services for the nonprofit.

    “Whenever we give them a list of work they need to do, they really finish it.” - Director, Nonprofit

  • 28
    $5,000+
    10 - 49 Employees
    Boston MA

    Uhray is a software development house based in Kansas City. Founded in 2014, their team of around 40 services midmarket and small business clients. They focus primarily on custom software development, mobile app development, and web development.

    Clients
    CDLlife
    University of Notre Dame
    Little Hoots
    Industries
    Notable Project

    Uhray became the in-house development team for an ad firm. They handled smaller projects, like integrating Google AdSense, as well as larger projects, like fully creating a mobile app and custom CRM.

    "Overall, I have been very happy with the level of service that Uhray has provided me with.  The results they deliver to me have allowed me to grow my company substantially over the years and as a result of my work with them, they grow in unison." — President, Logistics Media Company

  • 29
    $10,000+
    10 - 49 Employees
    Cohasset MA

    Kevit Technologies is a chatbot agency headquartered in Rajkot, India. The company was founded in 2018, and has a team of 35 that specializes in AI. They also provide digital strategy, web development, and business consulting services for clients in the advertising, marketing, and business services industries.

    Clients
    M&M Belgium
    Lawren.io
    Chatbots.expert
    Parenting Nation
    Industries
    Notable Project

    Kevit Technologies did chatbot development for an IT company. The client needed a chatbot solution because they wanted to be able to guide users personally. The company and the client worked together closely, and the client was happy with the quality of their work. 

    “They provide insights into our progress. They’re very professional and I’m enthusiastic about their support. It's a delight working with them.” — Founder, IT Company

  • 30
    $10,000+
    2 - 9 Employees
    Boston MA

    Next Idea Tech, Inc is a custom software development firm headquartered in Beverly, Mass. Founded in 2018, the team has less than 10 employees who primarily provide custom software development and web development services. They work with mid-market and small businesses and work in the health care & medical, e-commerce, advertising & marketing industries. 
     

    Clients
    Source Media
    YPrime
    Industries
    Notable Project

    Next Idea Tech, Inc is doing .NET and Angular development for clinical trial management applications. They used Angular, JavaScript, and TypeScript to develop a web app and they worked on automation and architectural designs. The client has been happy with the quality of the company’s work, even with a tight deadline.

    “Our experience with Next Idea Tech has been really good and their code quality is remarkable. The feature they’re working on is very critical for us and we have a very tight deadline. We trust them to do it. So far, it’s been working really well and I don’t have any complaints.”

    — Senior Director of Product Engineering, Clinical Trial Management Solutions Provider
     

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