Lead Full-Stack Developer (.Net and React)

About Us
JustAnswer is the leading AI + Human professional services platform, on a mission to revolutionize how people access expert help. Since 2003, we’ve connected millions of customers across 196 countries with verified professionals in real time—anytime, anywhere. With a powerful combination of human expertise and cutting-edge AI, we’re transforming the future of professional services.

Rooted in boldness, humility, and innovation, we take a data-driven approach to solving complex problems and continuously improving through Lean principles.

About the Role

As a Lead Full-Stack Developer (Tech Lead), you will take a hands-on leadership role in the design, development, and delivery of high-traffic, customer-facing applications across international markets including the United Kingdom, Germany, Spain, France, and Japan. In addition to building scalable solutions using React, .NET Core, .NET 6+, and C#, you will guide the technical direction of the team, mentor engineers, and ensure best practices in architecture, code quality, and deployment.

This is a high-impact role where you'll shape how we scale and evolve our international platform, which supports 1M+ daily users and processes over 2B monthly requests. You’ll work cross-functionally with Product, UX, and Engineering stakeholders and help drive our strategy around performance, scalability, and AI integration.

What You’ll Do

• Lead the design and development of full-stack web applications using React and .NET technologies.

• Act as a technical mentor and thought leader for a team of engineers, supporting growth and encouraging a culture of engineering excellence.

• Collaborate with Product Managers, UX Designers, and cross-functional teams to translate business requirements into scalable technical solutions.

• Set and maintain high standards for code quality, testing, and CI/CD practices.

• Conduct code reviews, provide architectural guidance, and ensure alignment with best practices.

• Monitor production systems, ensure high availability and performance, and proactively address technical debt.

• Drive the implementation of AI-powered features and LLM-based flows, contributing to our innovation strategy.

• Promote a DevOps mindset and lead continuous improvements in deployment frequency, development velocity, and system reliability.

What We’re Looking For

• 7+ years of experience in commercial full-stack development, with at least 2+ years in a technical leadership or lead developer role.

• Deep expertise in .NET Core, C#, and React.

• Strong understanding of modern web architecture, microservices, REST APIs, and asynchronous programming.

• Proficiency with automated testing frameworks such as Jest/Vitest, Playwright, and NUnit.

• Experience guiding teams through Agile development processes and continuous integration/delivery.

• Upper-Intermediate level of English or higher, with strong communication and collaboration skills.

• A proactive, solution-oriented mindset with a passion for mentoring and enabling teams.

• Curiosity and enthusiasm for AI technologies, with a desire to explore and implement AI-driven solutions.

Why Join Our Team
At JustAnswer, we blend the best of AI and human expertise to make a real impact. Our mission-driven culture values bold ideas, continuous learning, and global collaboration. We offer a flexible, remote-first environment with equitable rewards, career growth opportunities, and a supportive community where your contributions truly matter. Join us and be part of something bigger, helping people, one answer at a time. 

Our JustAnswer Promise
We strive together to make the world a better place, one answer at a time. JustAnswer's mission is to help people. We do this by connecting our members with verified Experts to help answer life's questions and solve problems. It’s not every day in your life that you get to be a part of a simple yet powerful mission. We pride ourselves in doing things the JA Way.
•    Data driven: Data decides, not egos
•    Courageous: We take risks and challenge the status quo
•    Innovative: We're constantly learning, creating, and adapting
•    Lean: We focus on customers, using lean testing to learn how to serve them best
•    Humble: Past success is not a guarantee of future success
If these things matter to you, come join the team here at JustAnswer!

Our Commitment to an Inclusive Workplace
We welcome people from all backgrounds who seek the opportunity to help build a future where professional services are readily available to all. If you have curiosity, passion, and a collaborative spirit, come work with us. JustAnswer is committed to an inclusive workplace. JustAnswer is an equal opportunity employer and does not discriminate on the basis of race, national origin, gender, gender identity, sexual orientation, disability, age, or other legally protected status.

AI Disclosure & Informed Consent
Artificial intelligence (AI) technology may be used during the hiring process to record, transcribe, analyze, and rank interview responses. By submitting your application and participating in the interview process, you acknowledge and consent to the use of AI technology in the hiring process. For more information see our AI Disclosure and Consent Policy.

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