Senior Full Stack Developer (Remote, Full-time) [HR144]

About Smart Working

At Smart Working, we believe your job should not only look right on paper but also feel right every day. This isn’t just another remote opportunity - it’s about finding where you truly belong, no matter where you are. From day one, you’re welcomed into a genuine community that values your growth and well-being.

Our mission is simple: to break down geographic barriers and connect skilled professionals with outstanding global teams and products for full-time, long-term roles. We help you discover meaningful work with teams that invest in your success, where you’re empowered to grow personally and professionally.

Join one of the highest-rated workplaces on Glassdoor and experience what it means to thrive in a truly remote-first world.

About the Role

KAI Conversation is hiring a Senior Full Stack Developer to join a small, collaborative engineering team working on the evolution of our platform. This is a long-term opportunity with a strong backend focus (70%), supporting key initiatives including modernising Python AWS Lambda microservices, improving ingestion capabilities, and strengthening platform observability. You will work closely with the Technical Lead, Engineers, Manual Tester, and Technical BA to deliver scalable, well-tested solutions and contribute to future projects, including rebuilding our phone and web applications to surface more meaningful conversation insights starting in Q2 2026.

• Contribute to the modernisation of Python AWS Lambda microservices by understanding legacy Python code and rebuilding services using the modern KAI SDK.
• Build and maintain extensive unit test suites to ensure reliability, quality, and long-term maintainability of microservices.
• Support the rewrite of ingestion capabilities by developing new Python Lambda microservices and extending TypeScript data pipelines.
• Help rewrite the initial part of the data pipeline to support high-throughput analysis.
• Improve the observability of conversations flowing through the platform and ensure issues can be identified and diagnosed efficiently.
• Contribute to the initiative starting Q2 2026 to rebuild both the phone application and web application to surface more meaningful conversation insights.
• Work effectively within a small team, delivering work both independently and collaboratively.
• Collaborate with the Technical BA to assist with refining tickets and clarifying requirements before implementation.

• 4+ years of professional experience as a Full Stack Developer or similar role.
• 5+ years of hands-on experience with Python (mandatory).
• 4+ years of hands-on experience with TypeScript (core skill; exceptional candidates may be considered without it).
• Strong experience working in a full-stack development environment with a backend focus.
• Strong experience working with serverless and microservice-style architectures.
• Proven ability to work with legacy codebases and modernise them into scalable, maintainable solutions.
• Strong unit testing skills and experience building reliable automated test coverage.
• Strong problem-solving skills with a detail-oriented mindset.
• Ability to work in a balanced way across collaboration and independent delivery.

• 2+ years of experience with React (Vue is also acceptable).
• 1+ year of experience with AI / LLM-related development or exposure to AI-enabled features.
• 2+ years of experience with AWS (Azure or GCP also acceptable).
• Experience improving observability, monitoring, logging, and troubleshooting in production environments.
• Experience working on ingestion pipelines, data processing workflows, or high-throughput systems.

• Fixed Shifts: 12:00 PM - 9:30 PM IST (Summer) | 1:00 PM - 10:30 PM IST (Winter)
• No Weekend Work: Real work-life balance, not just words
• Day 1 Benefits: Laptop and full medical insurance provided
• Support That Matters: Mentorship, community, and forums where ideas are shared
• True Belonging: A long-term career where your contributions are valued

At Smart Working, you’ll never be just another remote hire.

Be a Smart Worker - valued, empowered, and part of a culture that celebrates integrity, excellence, and ambition.

If that sounds like your kind of place, we’d love to hear your story.