Job Title

Lead Full Stack Engineer Job Type:

Full Time Location

Remote

About the Role We're looking for a hands-on

Lead Full Stack Engineer to build and scale AI-enabled, cloud-native applications for a fast-paced FinTech product environment. The role will have a strong backend focus (70%) with frontend development (30%) , requiring deep expertise in Python, React.js, AWS, and PostgreSQL. You'll own features end-to-end, from design and development through deployment, while integrating AI/GenAI capabilities into production applications.

Key Responsibilities Design and build scalable backend services and APIs using

Python . Develop responsive and production-ready frontend applications using

React.js . Own features end-to-end, from technical design and implementation to production deployment. Build cloud-native and serverless applications using

AWS . Design and optimize

PostgreSQL databases, including schemas, queries, indexing, and performance. Integrate

LLMs and Generative AI capabilities into production applications. Build AI-powered features including intelligent search, chat interfaces, document processing, and workflow automation. Integrate AI APIs such as

OpenAI, Claude, Azure OpenAI , or similar platforms. Collaborate with Product, Design, Data Engineering, Analytics, and Engineering teams. Build reusable components, automation tools, APIs, and internal applications. Participate in code reviews, testing, debugging, and performance optimization. Ensure applications are secure, scalable, reliable, and production-ready.

Required Skills 6+ years of experience in

Full Stack / Software Engineering .



Strong hands-on expertise in

Python and backend development. Strong experience with

React.js and modern frontend development. Solid hands-on experience with

AWS Cloud , including cloud-native and serverless architectures. Strong experience with

PostgreSQL , including database design, schema management, query optimization, and database operations. Hands-on experience integrating

LLMs / Generative AI into production applications. Experience with AI APIs such as

OpenAI, Claude, Azure OpenAI , or similar platforms. Strong understanding of

REST APIs, distributed systems, scalable application design, and microservices . Experience building and deploying end-to-end products in production. Strong coding, debugging, problem-solving, and engineering skills.

Nice to Have Experience with

RAG, vector databases, semantic search, LangChain/LlamaIndex, or MCP . Experience with

Docker, Kubernetes, CI/CD, and Terraform . Experience with AWS services such as

Lambda, ECS/EKS, RDS, S3, API Gateway, and CloudWatch . Experience working with data platforms, ETL/data pipelines, or analytics systems. Experience in

FinTech, SaaS, or high-growth product environments . Solid experience using AI-assisted development tools to improve engineering productivity.

What We're Looking For A passionate, hands-on

Full Stack Engineer who is strong in Python and comfortable across the frontend, cloud, database, and AI layers. Someone who takes complete ownership of features, enjoys solving complex engineering problems, and is excited about building

AI-powered products in a fast-paced FinTech environment

📌 Lead Full Stack Developer | AI-Powered FinTech (Mumbai)
🏢 Mumba Technologies
📍 Mumbai