Source Job

India

  • Develop high-quality training data for AI models using C#.
  • Challenge advanced language models on software engineering tasks and document failure modes.
  • Verify logical accuracy, assess code quality, and suggest improvements to evaluation metrics.

C# Algorithms Software Architecture RESTful API Systems Programming

16 jobs similar to C# Coding Specialist - Freelance AI Trainer

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US

  • Design and develop generative AI solutions across a rapidly expanding product portfolio.
  • Collaborate with cross-functional teams to integrate AI tech into existing systems.
  • Stay up-to-date with the latest research and trends in commercial AI systems.

At Patch My PC, we exist to improve lives. Our fully remote crew of 150 GIF-loving humans supports over 10,000 customers and more than 30 million devices.

Africa Global

  • Own the end-to-end technical architecture of Sparkrock's SIS platform, spanning legacy VB6/COM/T-SQL systems and modern C# layers.
  • Direct AI coding agents (Claude Code) to implement architectural decisions — you design, agents build.
  • Define and enforce architectural guardrails: domain boundaries, coding conventions, and integration patterns for AI agents to follow.

Sparkrock helps social benefit organizations like nonprofits, school boards, and government agencies reach their full potential through technology. The company is a best-in-class, 100% remote organization with the brightest talent from around the world.

Canada

  • Lead a team of software developers and data scientists to deliver AI-powered products and features that create exceptional user experiences.
  • Manage the AI roadmap, prioritize initiatives, and ensure alignment with business goals, customer needs, and technical feasibility.
  • Establish best practices for AI-Native development including code authoring, automated testing, CI/CD, observability, and AI evaluation frameworks.

LawDepot is a leading provider of legal document solutions, modernizing the legal document creation experience for millions of users worldwide with fast, easy-to-use, and professional tools. It is a seven-time Growth 500 ranked organization with a collaborative and inclusive learning culture that values excellence and diversity.

Europe 5w PTO

  • Ownership of the full software development life cycle.
  • Work with cloud base architecture focusing on scalability and performance.
  • Address data challenges by implementing robust data engineering practices.

SciLeads is a fast-growing, remote-first SaaS company helping reshape how scientific companies do sales and marketing. They have over 90 people across the UK, Canada, and beyond, and plans to grow to 150+ in the next two years, with a culture of openness, flexibility and innovation.

  • Your work will be split roughly 30/70 between product support and building new platform features and optimizations.
  • You will own platform feature development end to end: technical design, implementation, merge procedures, and maintenance primarily on the web backend.
  • You will run peer reviews and hold the bar on technical design, code quality, maintainability, and performance.

Acumatica is a leading innovator in cloud ERP (Enterprise Resource Planning) solutions with growing businesses worldwide. Acumatica is different by design and purposely built to help small and midsized companies thrive in today’s digital economy with a collaborative and high-energy culture.

  • Design, develop, and deploy generative AI product features from prototype through scaled production.
  • Build and ship agentic workflows that reliably accomplish real customer outcomes.
  • Collaborate with product managers, designers, and data science to translate ambiguous problems into AI solutions.

Quantum Workplace helps leaders build thriving teams that are aligned, empowered, growing, and valued. They offer a connected talent platform and have partnered with thousands of organizations in their 20+ years in the HR technology space.

US

  • Own the architecture, development, and evolution of the AI-native answering service platform.
  • Actively write and review production code, set technical direction, and build the engineering team.
  • Partner with product and clinical teams to align technical roadmap with business strategy.

PerfectServe provides clinical communication and physician scheduling solutions for healthcare. The company has 400+ employees, 30,000+ customers, and $100M+ in annual revenue, fostering a collaborative and tech-forward culture.

Global

  • Design, develop, and maintain scalable backend services and APIs using C# and .NET 10
  • Build and maintain secure, reliable integrations with third-party systems and external APIs
  • Ensure systems are observability-first through effective logging, metrics, monitoring, and alerting

Smart Working believes that your job should feel right every day. They connect skilled professionals with global teams for full-time, long-term roles and help you discover meaningful work with teams that invest in your success.

Global

  • Work as a software engineer maintaining and expanding agentic coding systems and AI SDK features.
  • Take end-to-end ownership of new features, collaborating with teams to deliver reliability and great developer experience.
  • Serve as a domain expert on AI design patterns, collaborating with field staff and writing public technical documentation.

Temporal provides a reliable foundation powering AI leaders such as OpenAI, NVIDIA, and others, serving users across a broad range of AI applications. The company is fully remote, action-oriented, and focused on shipping fast and solving customer problems with a thorough technical grounding.

Latin America

  • Design, develop, and maintain cloud-native SaaS applications using React, C#, .NET Core, and AWS.
  • Collaborate with cross-functional teams to build and scale highly available, multi-tenant distributed architectures.
  • Mentor junior engineers, participate in technical decision-making, and promote engineering best practices.

Truelogic is a leading provider of nearshore staff augmentation services, delivering top-tier technology solutions to companies of all sizes from startups to Fortune 500 enterprises. With a team of over 600 highly skilled tech professionals based in Latin America, they drive digital disruption and foster a culture that values expertise, aspirations, and career growth.

US

  • Write behavioral specs, architectural constraints, and feature requirements that agents implement against.
  • Build and maintain harness infrastructure including structural tests, linting rules, and CI gates.
  • Design validation systems where agents write the tests and you verify features work from the user's perspective.

Bolo.ai builds generative AI systems for the energy industry, making daily work faster, safer, and better for heavy industry workers. We have Fortune 500 contracts, production deployments, and growing enterprise demand, and we're scaling with a small, senior-leaning engineering team.

Global

  • Collaborate with a team of curious individuals to build and improve software solutions.
  • Use your 5+ years of experience in .NET, Angular, and React to coach and mentor others.
  • Enjoy the freedom to work from anywhere while focusing on what needs to be done.

LT is a technology company that builds kick-ass software with a focus on curiosity and challenge. They offer a flexible, low-bureaucracy environment where individuals can write their own story and make a difference.

Mexico

  • Design and code new features/enhancements and troubleshoot production issues.
  • Create/update features to meet our security, coding, and functionality standards.
  • Develop tools and practices that will increase the efficiency of your team.

Encora is a global company that offers Software and Digital Engineering solutions. Our practices include Cloud Services, Product Engineering & Application Modernization, Data & Analytics, Digital Experience & Design Services, DevSecOps, Cybersecurity, Quality Engineering, AI & LLM Engineering, among others.

US 6w PTO

  • Work as a member of Agile project teams to define, estimate, and complete agreed tasks to timelines.
  • Develop and maintain software, databases, and applications, including writing effective RESTful APIs and troubleshooting complex code bases.
  • Test software to ensure integrity, accuracy, responsiveness, and performance, and create unit tests according to company procedures.

Trupanion is a leading provider of medical insurance for cats and dogs in North America. They offer a collaborative, casual, and pet-friendly environment where everyone is encouraged to be themselves.

US Unlimited PTO 2w maternity

  • Help drive development of the Hirevue Interviewing Product Line, utilizing the best development techniques, patterns, frameworks and libraries.
  • Analyze Product Requirements and write Technical Designs, writing simple, clear, secure, resilient code and unit tests.
  • Collaborate in and/or own the Research and Planning of new Initiatives, resolving complex problems and broadcasting knowledge gained.

Hirevue transforms the way organizations discover, engage, and hire talent with its end-to-end hiring platform. This platform features video interviewing, assessments, and conversational AI and has hosted millions of interactions for over 1200 customers globally.

  • Architect, develop, and maintain business applications with a focus on AI solutions.
  • Process user requests for development of new and support for existing IT systems.
  • Execute and implement software tests, participate in code reviews, and follow development standards.

PSI is a leading Contract Research Organization (CRO) with 30 years of experience in the pharmaceutical industry, supporting clinical trials globally. The company fosters an inclusive culture where a diverse range of colleagues feel welcomed and valued, attracting and retaining top talent worldwide.