Senior Full Stack Developer

Job Description

Job Title: Senior Full Stack Developer (MERN) Experience: 7+ Years Location: Chennai About Codewalla: Codewalla is a New York?based product studio with engineering teams in India. Since 2005, we?ve built innovative products that scale. We work at the intersection of design, engineering, and AI developing systems shaped by real business needs and tested in the real world. Our team moves fast, thinks deeply, and cares about pushing what software can do to empower people and businesses. Role Overview We?re looking for an experienced Fullstack Developer who will play a critical role in modernizing legacy systems and leading large-scale code migration projects. This role goes beyond building new features; it's about architecting solutions that transform existing applications into scalable, maintainable, and future-ready platforms using the MERN stack. What will you be working on? Design and build robust backends with Node.js, Express.js, and microservices architecture Develop responsive, user-friendly UIs with React.js and related ecosystem tools Work with custom Next.js configurations including routing, middleware, SSR (Server-Side Rendering), and SSG (Static Site Generation). Implement project-specific logic using App Router and dynamic routes. Optimize databases, migrate schemas, and ensure seamless transitions between SQL and NoSQL systems Collaborate with cloud teams to integrate and migrate workloads on AWS, GCP, or Azure Set up and manage CI/CD pipelines to support modernization workflows Partner with product managers, designers, and other engineers to deliver value-driven outcomes Use AI development tools (GitHub Copilot, Cursor, ChatGPT) to accelerate modernization and reduce migration errors Mentor junior engineers in best practices for migration, refactoring, and scalable design What should you bring with you? A strong foundation in software development principles, architecture, and system design Interest in AI tools like GitHub Copilot, Cursor, or similar Startup mindset, ambiguity, short cycles, fast delivery Strong communication and collaboration skills Proven expertise in MERN stack (MongoDB, Express.js, React.js, Node.js) Demonstrated experience in legacy system modernization, refactoring, and codebase migration Strong understanding of SQL and NoSQL databases and migration strategies Hands-on experience with cloud environments (AWS, GCP, or Azure) and Dockerized deployments Familiarity with CI/CD pipelines and Git workflows Multi-language fluency (preferred, given leadership responsibilities at SDE L4 level) Why work at Codewalla? Build for scale: Work on products that get investor love and scale to global audiences Be part of AI-native product development: Integrate AI tools into how we design, build, and ship Global exposure: Directly collaborate with US-based startups, VCs, and product teams Learn fast: Small, elite teams with zero bureaucracy and high ownership See your impact: Every decision you make will shape user experience and business outcomes. Inclusion Matters: We?re an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all team members. If you?re passionate about building real products that ship fast and scale well, we?d love to hear from you. Apply now and let?s build together.