Top 60 JavaScript Development Companies in Seattle
September 2023Looking for a top JavaScript developer in Seattle?
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 Seattle. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best Seattle JavaScript Developers
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1
- $5,000+
- 50 - 249 employees
- Seattle, WA
UPQODE is a website design and development agency based in Nashville, Tennessee. Founded in 2015, the team of 40+ specializes in web development, web design, and e-commerce development. They work with small businesses, focusing on information technology, e-commerce, and business services.
Clients
- Think Tank Team - Samsung Research America
- SAA - Spondylitis Association of America
- AmeriFreight Inc.
- DOXO Inc.
Industries
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A landscape management company absorbed another business and needed to redirect their website to the updated site. UPQODE redirected the website and provided web design updates to incorporate the new branch.
"It was a smooth experience, and we would definitely use them again."
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2
- $25,000+
- 10 - 49 employees
- Seattle, WA
Culture Foundry is a web agency founded in Seattle in 2010 with more than 10 employees. They specialize in digital strategy, web design, and web development solutions for small and mid-market firms in the fields of arts, IT, and financial services.
Clients
- 24 Hour Fitness
- Audinate
- Ballet Austin
- Belmont Stakes / NYRA
Industries
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Culture Foundry was hired by a racing association to update their site's structure, design, and backend setup. The team now conducts regular audits to help improve customer experience on the site's front end.
"Culture Foundry's team members are committed to working together to help achieve our business goals."
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3
- $25,000+
- 10 - 49 employees
- Seattle, WA
Founded in 2000, UpTop specializes in UI/UX design but also shines in web and mobile app development. Their team of 50+ are passionate about solving complex problems and increasing revenue for their clients.
Clients
- Amazon
- Microsoft
- CenturyLink
- F5
Industries
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UpTop redesigned the UX/UI of a digital services company’s website, creating layouts that better met user persona needs. They created templates that standardized the overall visuals and wrote usage guidelines.
“It’s important to note how much our team universally accepted UpTop’s work.”
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4
- $25,000+
- 2 - 9 employees
- Seattle, WA
Black Antelope is a digital creative industry headquartered in Seattle. It was founded in 2009 and has expanded to additional locations in Sacremento, Calif. and London. Black Antelope has about 3 employees that serve a range of enterprise and small- to mid-sized businesses. Services include custom software development, web development, and web design.
Clients
- UC Berkeley (Berkeley, CA)
- UCSF (San Francisco, CA)
- Monterey Bay Aquarium (Monterey, CA)
- Fujitsu Laboratories Of America (Sunnyvale, CA)
Industries
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Black Antelope was hired by an academic research institute to develop their brand identity, redesign their site, and migrate it to WordPress. This involved implementing new interactive features into the site.
"We could not be happier with the final product — it looks sleek and professional."
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5
- $1,000+
- 2 - 9 employees
- Seattle, WA
A digital marketer based in San Francisco, Randy McCabe offers SEO, PPC, and digital strategy services. They were founded in 2018.
Clients
- Morgan Stanley
- Huawei
- NameSilo
- RE/MAX
Industries
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Exo Agency manages the SEO needs of a PPC services company. They also provide backlink services to the client.
"The team displayed an unparalleled level of professionalism and expertise, which truly set them apart."
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6
- $25,000+
- 2 - 9 employees
- Seattle, WA
Lunarbyte.io is a development agency based in Seattle. Since 2019, the 3-person team has built websites, custom software, and mobile apps for predominantly small businesses.
Clients
- DDM Imports
- Clean the Scene
- Preflight Mitigator
- Dollar Flight Club
Industries
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Lunarbyte.io developed software programs for a testing firm. They met with their client’s multiple times to outline the project. Since then, they’ve troubleshot problems and fixed bugs as needed.
“They usually complete the task within 24-hours or by the end of the week.”
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7
- $25,000+
- 50 - 249 employees
- Seattle, WA
Founded in 2000, Blink UX has almost 20 years of experience in the IT sector. True to their name, Blink UX specializes in UX/UI design but also offers mobile and web development, research, strategy, and design services.
Clients
- Amazon
- NASA
- Apple
- Disney
Industries
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Blink UX designed an e-commerce website, condensing several branch URLs into one comprehensive site. They worked on UX, UI, content development, and stakeholder research before providing a spec to developers.
"They did really great, especially when things were outside of scope. The project got very complex."
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8
- $1,000+
- 50 - 249 employees
- Bellevue, WA
Founded in 2014, Golden Eagle IT Technologies Pvt. Ltd. Is a SEO services firm. The midsize Indore, India-based team provides search engine optimization, custom software development, web design, ux/ui design, and more.
Industries
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Golden Eagle It technologies provides staff augmentation services for an IT services firm. The vendor has deployed several Ruby on Rails developers to help the client complete a specific project.
"We’re impressed with their ability to communicate well and deliver the project on time."
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9
- $5,000+
- 10 - 49 employees
- Seattle, WA
Slashdev is a small software development company. The Winter Park, Florida-based company was established in 2021. Their services include custom software development, web development, mobile app development, wearable app development, and more.
Industries
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Slashdev has provided a senior Flutter developer to augment a software development company's internal team.
"We knew what we wanted, and they delivered quickly."
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10
- $10,000+
- 10 - 49 employees
- Medina, WA
A full-service digital design and development agency, Flower Press Creative Studio takes on mobile app, web, and custom software development projects. Founded in 2001, the small team of 6 is headquartered in Seattle and also has experience in UI/UX design.
Clients
- Insurance Lounge
- Brown Bear Car Wash
- Geek Girl Careers
- World Perspectives
Industries
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Flower Press Creative Studio, LLC was hired by an athletic platform to build a mobile and web app. The team was responsible for UI/UX designs, wireframing, and front- and backend development.
"The UX/UI designer won an award for the designs of our platform."
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11
- $25,000+
- 10 - 49 employees
- Seattle, WA
Founded in 2010 in Seattle, Billberry is a software development studio creating custom software, web apps, and digital products in partnership with some of the world's biggest brands. They have a veteran team of fewer than 50 strategists, designers, and developers who work in partnership with clients to help them grow, innovate, and move their businesses forward. Clients include businesses of all sizes in various industries, including business services, consumer products and services, and financial services.
Clients
- Days for Girls
- Snohomish County Public Utilities
- Impinj
- The Live You Can Save
Industries
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A fundraising company was looking to improve their online presence, so they engaged with Bilberrry to provide them with WordPress web development, design, branding, and ongoing maintenance and hosting.
"I highly recommend employing their services because Bilberrry is relatable and easy to work with."
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12
- $5,000+
- 10 - 49 employees
- Seattle, WA
Codersh Web Services is a web agency based in Ahmedabad, India, and founded in 201. With no more than 10 experts, they specialize in web design, web development, and mobile app development services for small firms in the industries of business and IT services, among others.
Clients
- Reinventu Pro
- Redesign Hub
- Vidste
- Bahia Days
Industries
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Codersh Web Services is helping build the website of a religious matchmaking platform. This also involves implementing various features and applying necessary improvements in terms of design.
"Their work is very good, and I am happy with it."
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13
- $1,000+
- 2 - 9 employees
- Seattle, WA
Visualwebz is a digital design and marketing agency located in Renton, Wash., with under 10 employees. Founded in 2008, the company mainly provides web design and development, e-commerce development, SEO services, and content marketing using a variety of programs and systems.
Clients
- TimeXtender
- Mitsubishi
- Fuso
- PGTAA
Industries
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Visualwebz, LLC provides website development services for a healthcare company. The team is responsible for maintaining and modifying the client's site.
"Rav is very responsive and has maintained our website and made necessary changes."
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14
- $1,000+
- 10 - 49 employees
- Seattle, WA
Seattle New Media is a website development agency based in Seattle. The agency, founded in 2006, has a team of less than ten that provides, among others, video production, web development, and mobile app development services to various companies and clients.
Clients
- Dr. Tracy
- Clearview.ai
Industries
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Seattle New Media designed and developed Webflow website with multiple pages for a mobile marketplace. They were also tasked with transferring the site to a custom domain.
"We were impressed with the quality of work they provided at an affordable price."
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15
- $5,000+
- 10 - 49 employees
- Seattle, WA
Hero Creative is a Seattle-based media production company founded in 2012. Their team of around 10 employees provides marketing strategy, branding, advertising and web design. They primarily serve enterprise clients in the advertising, hospitality and nonprofit industries.
Clients
- Make-A-Wish Foundation
- University of Washington
- Leukemia and Lymphoma Society
- Northwest Motorsport
Industries
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Hero Creative serves as the long-term video production and creative partner for a large apartment management company. They handle scripts, storyboards, voiceovers, still photography during production projects.
“They have a creative eye and a willingness to suggest things that haven’t been done before.”
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16
- $5,000+
- 10 - 49 employees
- Seattle, WA
Conflare is a web development and design firm in Seattle. It was founded in 2004 and currently has 4 employees. Conflare provides web design and development, branding, digital strategy, and video production services mainly to small business clients.
Clients
- Artisan Electric
- PhotoTC
- AME Commerce
- Foundry Law
Industries
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Conflare gave branding counsel and built a jewelry retail website from scratch. The team custom-coded a complex design-your-own-ring feature and now provides ongoing site updates and product adds.
"Everyone is impressed with the site."
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17
- $10,000+
- 2 - 9 employees
- Seattle, WA
Gigantic is a web design agency founded in 2020. The agency specializes in web design, ux/ui design, web development, branding, and more and has a small team.
Industries
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An advertising agency was looking to rebrand their image and online presence, so they engaged with Gigantic to provide them with web development, SEO management, and marketing campaigns and strategies.
"They delivered above and beyond what we were expecting."
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18
- $1,000+
- 10 - 49 employees
- Seattle, WA
ALMAX DESIGN AGENCY LLC is a web development company. They specialize in web development, mobile app development, web design, and ux/ui design and were established in 2019. The firm is headquartered in.
Industries
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ALMAX Design Agency provided development and design services for a subscription analytics company. They did several projects with the firm and used tools like Figma and Adobe XD to deliver designs.
“They had great communication — the team quickly understood our goals and suggested some unique design features.”
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19
- $5,000+
- 50 - 249 employees
- Seattle, WA
Forum One is a full-service digital design firm that was founded in 1997. The company has more than 100 employees in Alexandria, Va., Washington, D.C., and Seattle. Forum One offers web design, UX/UI design, web development, branding, and other digital services for mainly nonprofits and government agencies.
Clients
- Smithsonian Institution (National Museum of African American History & Culture
- National Museum of Natural History and the National Zoo)
- Global Impact
- Patient Centered Outcomes Research Institute (PCORI)
Industries
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In order to prepare a large museum for its opening, Forum One built a Drupal 7 site within institutional infrastructure, with strong SEO and consistent UX across a variety of devices.
“They brought a lot of experience from different clients across a variety of sectors, and we’ve benefited from that.”
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20
- $100,000+
- 250 - 999 employees
- Seattle, WA
Founded in 2014, PYCOGroup is a development firm. Their team of around 370 employees is based in Brussels, with an additional office around the globe. They focus on custom software, web, and mobile app development.
Clients
- Microsoft
- American Express
- Volkswagen
- Coach
Industries
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PYCOGroup designed and developed a government-funded mobile app to promote travel. While the internal team focused on the database and API, PYCOGroup focused on everything else, including delivery.
"The workflow was very fluid, efficient, and professional on PYCOGroup's side."
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21
- $5,000+
- 10 - 49 employees
- Bellevue, WA
Truu Digital, a website development company, was established in 2012. The small Bellevue, Washington-based team provides web development, conversion optimization, CRM consulting and SI, digital strategy, and more.
Industries
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Truu Digital developed a website for a chiropractor practice. The team built and designed a new website with a more modern image.
"They are up to date with technology, communicate well, and listen to your needs."
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22
- $25,000+
- 50 - 249 employees
- Bellevue, WA
Redtech is a custom software development firm. They are located in Bellevue, Washington and have a midsize team. Their services include custom software development, non-voice bpo/back office services, digital strategy, web development, and more. The agency was established in 1995.
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Redtech provided BI and analytics for a software company. They redesigned a learning catalog and supported in understanding its current status.
"Their subject matter expertise and professionalism were impressive."
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23
- $50,000+
- 50 - 249 employees
- Seattle, WA
ThirstySprout is an outsourced development company headquartered in Seattle with an additional office in San Franciso. Founded in 2017, they currently have about 18 employees. They provide IT staff augmentation as well as custom software and web development services to primarily midmarket agencies in IT, e-commerce, and business services.
Clients
- Rover.com
- Jirav.com
- Zillow
- WeWork Labs
Industries
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ThirstySprout developed automation software for a car-sharing company. The team built a data mart and a financial reporting system to analyze the company's data.
"They go above and beyond to provide great customer service and project delivery."
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24
- $10,000+
- 10 - 49 employees
- Seattle, WA
Helpful Human is a development agency based in Seattle. Since 2013, their team of 15 has been specializing in web design and development, mobile app development, and UX/UI design. They work primarily with small businesses in the information services and business services industries.
Clients
- Rudy's
- naturewise
- Elm Coffee Roasters
- Holland America Line
Industries
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Helpful Human helps a fintech company with market testing for their products and solutions. Their work includes ad copies, landing page tests, product concepts, design sprints, and software development.
“The quality of people that Helpful Human has on their staff is very high.”
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25
- $25,000+
- 2 - 9 employees
- Seattle, WA
Northwest Independent Ruby Development is a digital agency based in Seattle. Since 2011, the small team of four has specialized in providing web and custom software development.
Clients
- University of Washington
- Avvo
- Whitepages
- Behavioral Tech
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NIRD provided resources to help bring the Linehan Suicide Safety Net to market. They made the online software HIPAA compliant and reworked the backend to make it more stable.
"NIRD helped us get our program in a place where it was healthy and functioning the way it should be."
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26
- $1,000+
- 10 - 49 employees
- Redmond, WA
Designify is a web agency based in Redmond, Wash., and founded in 2017. With no more than 50 members, they specialize in web development, web design, and SEO solutions for small and mid-market businesses in the fields of business services, consumer products, and e-commerce.
Clients
- Startline
- Chipmonk Consulting
- Center Source Inc
Industries
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A B2B platform partnered with Designify to assist in hiring professionals to become part of its primary development team. The team will be doing this by designing and implementing new charts and UX/UI designs.
"Their project management is outstanding and state of the art."
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27
- $10,000+
- 50 - 249 employees
- Bellevue, WA
Virtuosity Consulting, a custom software development firm, was launched in 2008. They are located in Bellevue, Washington and Navi Mumbai, India and have a midsize team. Their services include custom software development, IT managed services, enterprise app modernization, web development, and more.
Industries
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A software company hired Virtuosity Consulting for staff augmentation. The team supplied qualified process-driven and self-motivated managers for early planning, daily execution, monthly releases, and more.
"The agency and the candidates they supplied really took ownership of the project."
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28
- $1,000+
- 10 - 49 employees
- Seattle, WA
Steelsmith Haus LLC is an internet marketing agency in Seattle. Founded in 2010, Steelsmith Haus has about 8 employees that work with a range of clients. Services include SEO, content marketing, web design, and email marketing services.
Clients
- StacheClip
- Starving Students
- UC Berkeley
- StemGenex
Industries
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Steelsmith Haus built a new website and subsequently created a marketing strategy. Post-launch, they’ve provided SEO and PPC.
"The team does a phenomenal job with web development and marketing."
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29
- Undisclosed
- 2 - 9 employees
- Seattle, WA
Perception Builder is a small conversion optimization company in Seattle, Washington. Established in 2011, the team focuses on conversion optimization, search engine optimization, ux/ui design, and web development.
Industries
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Perception Builder has been hired by a power sweeping company to update their website, develop new marketing strategies, provide SEO services, and create content for the website's overall improvement.
"We were impressed by their technical capabilities."
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30
- $5,000+
- 50 - 249 employees
- Bellevue, WA
Tech Pathway is a web development firm. Established in 2017, the midsize agency is located in Jaipur, India and Bellevue, Washington. Their team focuses on web development, mobile app development, and e-commerce development.Visit SiteIndustries
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