Lead Full-stack Engineer (React+.Net)

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, you will play a pivotal role in designing, developing, and maintaining our web applications, ensuring high performance and scalability. You will work closely with cross-functional teams to deliver high-quality software solutions while contributing to projects that integrate advanced machine learning models, including large language models (LLMs), to deliver personalized user experiences and innovative features. You'll be part of a small, collaborative team that values continuous improvement and embraces the latest in technology.
 
Our technology stack includes .NET Core, C#, React.js, Node.js, Typescript, SQL Server 2019, Docker, Kubernetes, Google Analytics, and Power BI.  

Our ecosystem includes 170 connected applications and services, our main database is 2 TB, our sites handle 1 million visitors a day and 2 billion requests a month, and we release changes to production several times a day. We are a continuous integration and continuous deployment (CI/CD) organization. 

What You’ll Do

• Guiding the team in making well-informed technical decisions that enhance the quality and maintainability of our solutions. 
• Collaborating with cross-functional teams to demonstrate how they can effectively leverage our infrastructure to meet their objectives. 
• Designing, developing, and maintaining robust, scalable, and efficient web applications, backend logic modules and database structure.
• Identifying and implementing strategies to improve the stability, performance, and scalability of our applications and services. 
• Responding promptly to production incidents, employing creative problem-solving skills to minimize downtime and mitigate potential issues. 
• Mentoring and supporting team members, fostering a culture of continuous learning and technical excellence.
• Conducting code reviews and ensuring adherence to coding standards and best practices across the team. 
• Participating in the evaluation and integration of new technologies, including AI and automation tools, to drive innovation and efficiency. 

What We’re Looking For

• Minimum of 7 years of professional experience in full stack development.
• Extensive experience with React.js, including state management (Redux, Context API) and component-based architecture.
• Proficiency in .NET frameworks, C#, and data access technologies.
• Familiarity with Unit / Integration tests using any of Jest, NUnit, Playwright, React Testing Library.
• Strong knowledge of front-end technologies such as HTML5, CSS3, JavaScript, and TypeScript.
• Familiarity with database systems such as SQL Server or MySQL.
• Strong knowledge of design and architectural patterns, SOA design & web service development.
• Strong understanding of development processes.
• Experience with Web Page performance optimization and measurement will be a plus.
• Degree in Computer Science, a related discipline or equivalent work experience.
• Upper-intermediate level of English.
• Excellent problem-solving and analytical skills, with a keen attention to detail.
• Strong communication and interpersonal skills, with the ability to work effectively in a team-oriented environment.
• Ability to manage multiple tasks and prioritize effectively in a fast-paced environment.
• Demonstrated leadership abilities, with a track record of mentoring and guiding junior developers.

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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