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Freelance Senior C# Developer Jobs (NOW HIRING)

Judge Group, Inc.

C Developer

Milton, GA

$120K - $125K/yr

C Developer Location: Berkeley Heights, NJ or Alpharetta, GA (Onsite) Fulltime About the Role We're looking for a Senior Software Engineer to design, build, and scale high-performance software ...

Galent

C Developer

Manhattan, NY

$54 - $72.75/hr

Job purpose Seeking a seasoned C Developer preferably someone with Capital Markets/Financial ... Translate technical choices into business outcomes; present trade-offs/risks to senior leaders and ...

New

INFOTRON

C Developer

Manhattan, NY · Hybrid

$54 - $72.75/hr

You should be highly acquainted with contemporary programming methods in an object-oriented ... Reporting to senior team members on project status and advancements. Attending project meetings ...

Deep Systems

$126K - $166K/yr

Senior Software Engineer Requirements: * Capital Markets Experience - understanding of front ... Partner with Lead Developer and Executive Management on various projects. * Manage individual ...

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How much do freelance senior c# developer jobs pay per hour?

As of Jun 14, 2026, the average hourly pay for freelance senior c# developer in the United States is $61.73, according to ZipRecruiter salary data. Most workers in this role earn between $52.40 and $69.23 per hour, depending on experience, location, and employer.
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Infographic showing various Freelance Senior C# Developer job openings in the United States as of June 2026, with employment types broken down into 8% As Needed, 68% Full Time, 8% Part Time, 8% Temporary, and 8% Contract. Highlights an 87% Physical, 5% Hybrid, and 8% Remote job distribution, with an average salary of $128,400 per year, or $61.7 per hour.
Senior C and VoIP Developer, Code: #166

Senior C and VoIP Developer, Code: #166

CellTrust Corporation

Scottsdale, AZ • On-site

Full-time

Posted 4 days ago

Job description

Job Summary:
CellTrust Corporation is seeking a Senior C and VoIP Developer to enhance their existing software products. The role involves leading and mentoring developers, participating in agile development, and managing multiple projects and deadlines.
Responsibilities:
• Develop new functionality on our existing software products
• Lead/mentor developers and share knowledge through knowledge-sharing presentations
• Participate in a small, experienced, energetic team on a rapid, agile development schedule
• Maintaining and supporting multiple projects and deadlines
• All other responsibilities as assigned
Qualifications:
Required:
• Senior C programmer with advance knowledge of VoIP
• Bachelor’s degree plus 5 years’ experience or master’s degree plus 3 years’ experience
• Ability to sit for extended periods of time. Must be able to type for extended periods of time.
• Must adhere to regular and predictable attendance
Preferred:
• Working Knowledge of Encryption (OpenSSL)
• Working knowledge of IP-PBX (Asterisk)
• Knowledge of PJSIP/PJLIB a plus
• Experienced working in an agile environment and within a small team
• Ability to work independently or as a member of a team
• Ability to delegate work effectively
• Ability to meet all deadlines
• Attention to detail and quality
• Excellent verbal and written communication
• The ability to multitask and adapt to changing priorities
• A strong work ethic, expressed through the willingness and ability to acquire new skills, multitask, and take on projects outside immediate areas of expertise
Company:
CellTrust Corporation, founded in 2006 and headquartered in Scottsdale, Arizona, USA, is a global leader in mobile communications security and compliance for the highly regulated industries. Founded in 2006, the company is headquartered in Scottsdale, USA, with a team of 51-200 employees. The company is currently Growth Stage.

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