Senior Full-Stack Developer (.Net and React)
About the Role
As a Senior Full-Stack Developer, you will join a mission-critical initiative to build an AI-powered subscription platform for solo professionals (Fount.com). Fount is an independent product unit partially supported by JustAnswer, and you’ll join its core delivery team. We’re developing a category-defining toolset that helps experts get leads, manage communications, and grow their businesses — all enhanced by intelligent AI assistants.
You’ll work across the full stack (.NET Core/C# + React.js), helping build new features like an auction system for lead bidding, expert/customer chats, contracts, and billing tools. Much of the work is greenfield (from the scratch), and you’ll play a key role in defining scalable architecture and shipping impactful features.
What You’ll Do
Design, develop, and maintain full-stack applications, backend logic modules, and front-end experiences using React.js and .NET Core.
Collaborate with Product, UX, and Engineering stakeholders to clarify requirements and contribute to technical planning and documentation.
Conduct code and design reviews, provide architectural input, and mentor junior developers on best practices.
Write and maintain automated unit and integration tests using tools such as Jest, NUnit, or Playwright.
Monitor and support production systems, resolve bugs, run performance audits, and ensure system stability.
Contribute to the implementation of AI-driven features, including prompt-based workflows, RAG pipelines, and personalized assistant flows.
Continuously improve code quality, team velocity, and system reliability through thoughtful technical decisions and rapid iteration.
What We’re Looking For
5+ years of commercial experience in full-stack software development.
Strong proficiency in .NET Core, C#, and React.js (or deep experience in another modern frontend framework and readiness to learn React).
Experience building and consuming REST APIs, and working with asynchronous backend services.
Familiarity with modern automated testing frameworks (Jest, NUnit, Playwright, etc.).
Comfortable working in a CI/CD environment with agile delivery cycles.
Basic database knowledge and familiarity with performance and scalability considerations.
Proven ability to work independently, own projects end-to-end, and make architectural tradeoffs.
Upper-Intermediate English or higher for effective communication with international stakeholders.
Curiosity and interest in AI-powered applications and emerging technologies.
Senior Full-Stack Developer (.Net and React)
About the Role
As a Senior Full-Stack Developer, you will join a mission-critical initiative to build an AI-powered subscription platform for solo professionals (Fount.com). Fount is an independent product unit partially supported by JustAnswer, and you’ll join its core delivery team. We’re developing a category-defining toolset that helps experts get leads, manage communications, and grow their businesses — all enhanced by intelligent AI assistants.
You’ll work across the full stack (.NET Core/C# + React.js), helping build new features like an auction system for lead bidding, expert/customer chats, contracts, and billing tools. Much of the work is greenfield (from the scratch), and you’ll play a key role in defining scalable architecture and shipping impactful features.
What You’ll Do
Design, develop, and maintain full-stack applications, backend logic modules, and front-end experiences using React.js and .NET Core.
Collaborate with Product, UX, and Engineering stakeholders to clarify requirements and contribute to technical planning and documentation.
Conduct code and design reviews, provide architectural input, and mentor junior developers on best practices.
Write and maintain automated unit and integration tests using tools such as Jest, NUnit, or Playwright.
Monitor and support production systems, resolve bugs, run performance audits, and ensure system stability.
Contribute to the implementation of AI-driven features, including prompt-based workflows, RAG pipelines, and personalized assistant flows.
Continuously improve code quality, team velocity, and system reliability through thoughtful technical decisions and rapid iteration.
What We’re Looking For
5+ years of commercial experience in full-stack software development.
Strong proficiency in .NET Core, C#, and React.js (or deep experience in another modern frontend framework and readiness to learn React).
Experience building and consuming REST APIs, and working with asynchronous backend services.
Familiarity with modern automated testing frameworks (Jest, NUnit, Playwright, etc.).
Comfortable working in a CI/CD environment with agile delivery cycles.
Basic database knowledge and familiarity with performance and scalability considerations.
Proven ability to work independently, own projects end-to-end, and make architectural tradeoffs.
Upper-Intermediate English or higher for effective communication with international stakeholders.
Curiosity and interest in AI-powered applications and emerging technologies.