Top 20 C# Developers in Seattle

The Best of December 2024

Looking for a top C Sharp software development company in Seattle?

The programming language C Sharp (C#), is general-purpose and used for web and mobile apps. It has a number of advantages: It's object-oriented, has automatic garbage collection, functions across platforms, has backward compatibility, and integrates well with other platforms and services.

List of the Best Seattle C Sharp (C#) Software Development Companies

1

ATOMICUS
(1 Reviews) 5.0
- Timeliness
  5.0
- Service Excellence
  5.0
- Value
  5.0
- Would Recommend
  5.0
- $50,000+
- 10 - 49 employees
- Seattle, WA
ATOMICUS, a custom software development firm, was launched in 1999. They are in Seattle, Washington and Gdańsk, Poland and have a small team. Their services include custom software development.
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Clients
- BRUKER
- CAMECA
- AMETEK
- Hitachi High-Tech
Industries
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2

UKAD
(34 Reviews) 4.9
- Timeliness
  4.8
- Service Excellence
  4.9
- Value
  4.8
- Would Recommend
  5.0
- $5,000+
- 250 - 999 employees
- Kirkland, WA
UKAD, founded in 2005, is an IT Outsourcing and Staff Augmentation company. Headquartered in Kirkland, WA, with delivery centers in Eastern Europe, their 300+ strong team delivers customized software development solutions. UKAD excels across a broad range of IT services, with deep expertise in Ecommerce, Retail, Logistics, Fintech, and Healthcare.

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Clients
- AJ Produkter
- Ginza
- TargetAid
- EntitledTo
Industries
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3

TheoremOne
(1 Reviews) 5.0
- Timeliness
  5.0
- Service Excellence
  5.0
- Value
  5.0
- Would Recommend
  5.0
- $100,000+
- 250 - 999 employees
- Seattle, WA
Founded in 2007, Theorem is a software development firm. The midsize team specializes in custom software development, ux/ui design, IoT development, IT strategy consulting, and more. The company is based in Los Angeles, California; Santa Monica, California; New York, New York and San Francisco, California.

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Clients
- AT&T
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4

Affirma Consulting
(13 Reviews) 4.7
- Timeliness
  4.7
- Service Excellence
  4.7
- Value
  4.5
- Would Recommend
  4.9
- $10,000+
- 250 - 999 employees
- Bellevue, WA
Affirma Consulting is a full-service technology consulting agency. Founded in 2001, Affirma Consulting is based in Seattle, WA with additional offices in Los Angeles, CA, India, Ireland, and Reno, NV. The team of 200+ focuses on consulting for Business Intelligence (BI), Sharepoint, Salesforce, and customer relationship management (CRM) software, they also offer design, marketing, and mobile and web development.

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Clients
- Microsoft
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5

Lunarbyte.io
(8 Reviews) 5.0
- Timeliness
  4.9
- Service Excellence
  5.0
- Value
  4.9
- Would Recommend
  5.0
- $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.

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Clients
- DDM Imports
Industries
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6

Slashdev
(16 Reviews) 5.0
- Timeliness
  5.0
- Service Excellence
  5.0
- Value
  4.9
- Would Recommend
  5.0
- $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.

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7

AccelOne
(12 Reviews) 4.9
- Timeliness
  4.8
- Service Excellence
  4.9
- Value
  4.8
- Would Recommend
  5.0
- $10,000+
- 50 - 249 employees
- Kirkland, WA
AccelOne is an IT strategy consulting company. The midsize Kirkland, Washington-based agency was established in 2013. Their services include IT strategy consulting, IT managed services, Custom Software Development, Web Development, and more.
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Clients
- Xapo
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8

PYCOGroup
(2 Reviews) 4.8
- Timeliness
  4.8
- Service Excellence
  4.8
- Value
  4.3
- Would Recommend
  5.0
- $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.

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Clients
- Microsoft
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9

Virtuosity Consulting
(1 Reviews) 5.0
- Timeliness
  5.0
- Service Excellence
  4.5
- Value
  4.5
- Would Recommend
  5.0
- $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.

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10

SOUTHWORKS

(0 Reviews)

Not yet reviewed.
- $10,000+
- 250 - 999 employees
- Bellevue, WA
SOUTHWORKS is a midsize custom software development firm. They offer Custom Software Development and cloud consulting & SI and were launched in 2004.
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11

Devblock

(0 Reviews)

Not yet reviewed.
- $10,000+
- 50 - 249 employees
- Seattle, WA
Devblock is a software development company. Based in Seattle, Washington and Ho Chi Minh, Vietnam, the company offers Custom Software Development and Web Development.
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12

Palador

(0 Reviews)

Not yet reviewed.
- $10,000+
- 10 - 49 employees
- Seattle, WA
Palador is a small custom software development firm headquartered in Seattle, Washington and Yogyakarta, Indonesia. Their services include Custom Software Development and Enterprise App Modernization.
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13

Jetstream Software, Inc.

(0 Reviews)

Not yet reviewed.
- Undisclosed
- 10 - 49 employees
- Kirkland, WA
Jetstream Software, Inc., a software development company, provides Custom Software Development and AR/VR development. The agency is located in Kirkland, Washington.
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14

TangoTeams

(0 Reviews)

Not yet reviewed.
- $75,000+
- 50 - 249 employees
- Seattle, WA
TangoTeams, a midsize website development company, is in Seattle, Washington. Their services include Web Development and Mobile App Development.
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15

DMC, Inc.

(0 Reviews)

Not yet reviewed.
- $10,000+
- 50 - 249 employees
- Seattle, WA
DMC, Inc., a custom software development firm, is based in Chicago, Illinois and Somerville, Massachusetts. The team provides Custom Software Development and CRM consulting and SI.
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Clients
- 3M
Industries
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16

Redapt

(0 Reviews)

Not yet reviewed.
- $50,000+
- 50 - 249 employees
- Woodinville, WA
Established in 1996, Redapt is a cloud consulting & SI company. The agency focuses on cloud consulting & SI and BI & big data consulting & SI, and is midsize.
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17

Diatomic Product Development

(0 Reviews)

Not yet reviewed.
- Undisclosed
- 10 - 49 employees
- Seattle, WA
Launched in 2017, Diatomic Product Development is a Product Design company. The company focuses on Product Design and Custom Software Development.
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18

Confiz

(0 Reviews)

Not yet reviewed.
- $10,000+
- 250 - 999 employees
- Bellevue, WA
Launched in 2005, Confiz is a midsize Bellevue, Washington-based IT staff augmentation company. Their services include IT staff augmentation and BI & big data consulting & SI.
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19

Marici Technology Solutions

(0 Reviews)

Not yet reviewed.
- Undisclosed
- 10 - 49 employees
- Seattle, WA
Cloud consulting & SI company Marici Technology Solutions provides cloud consulting & SI and ECM consulting and SI. They are headquartered in Seattle, Washington.
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20

Amberteq

(0 Reviews)

Not yet reviewed.
- $10,000+
- 10 - 49 employees
- Seattle, WA
Amberteq is a small Enterprise App Modernization company. Founded in 2018, the team offers Enterprise App Modernization and cloud consulting & SI.
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21

DigiCorders

(0 Reviews)

Not yet reviewed.
- $1,000+
- 10 - 49 employees
- Kent, WA
Established in 2021, DigiCorders is a social media marketing firm. The team provides Social Media Marketing and Content Marketing.
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22

Ataira Analytics Inc.

(0 Reviews)

Not yet reviewed.
- Undisclosed
- 10 - 49 employees
- Gig Harbor, WA
Ataira Analytics Inc. Is a small big data company launched in 2015. Their team provides BI & big data consulting & SI and cloud consulting & SI.
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23

Karma Consulting, Inc.

(0 Reviews)

Not yet reviewed.
- Undisclosed
- 10 - 49 employees
- Federal Way, WA
Karma Consulting, Inc. Is an UX design agency. They are in Federal Way, Washington. Their team provides UX/UI Design and cloud consulting & SI.
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24

Mystic Engineering / Mystic Industries

(0 Reviews)

Not yet reviewed.
- Undisclosed
- Freelancer employees
- Everett, WA
Mystic Engineering / Mystic Industries is a small Product Design company located in Everett, Washington. Their services include Product Design and Custom Software Development.
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