Senior Full Stack Engineer (MERN/ Python)

About Codewinglet

Key Responsibilities

• Design, develop, and maintain scalable web applications using the MERN stack or Python-based stacks (Django / FastAPI / Flask with React.js).
• Own features and modules end-to-end, from requirement understanding and implementation to testing, deployment, and maintenance.
• Build responsive, reusable, high-performance UIs using React.js / Next.js with TypeScript.
• Develop secure, scalable backend services and RESTful APIs using Node.js/Express.js or Python frameworks.
• Design and optimize data models, queries, and indexes across MongoDB, PostgreSQL, and Redis.
• Integrate frontend applications with backend services, third-party APIs, and AI/LLM capabilities.
• Containerize applications with Docker and maintain CI/CD pipelines on cloud platforms.
• Write unit and integration tests to keep code reliable.
• Debug and resolve bugs, performance bottlenecks, and production issues.
• Conduct code reviews and give constructive technical feedback.
• Work in Agile/Scrum with QA, Project Managers, and other engineering teams to plan and deliver features.
• Contribute to technical discussions and implementation and design decisions.
• Guide junior developers through code reviews and knowledge sharing.
• Keep up with relevant technologies and help improve development practices.

Must-Have Skills and Qualifications

• 2–4 years of hands-on Full Stack Web Development experience.
• Strong expertise in at least one stack:
  • MERN: MongoDB, Express.js, React.js, Node.js, OR
  • Python: Django / FastAPI / Flask with React.js
• Strong React.js skills: components, hooks, state management, reusable UI development.
• Hands-on experience with TypeScript and Next.js (or another modern React framework).
• Good understanding of MongoDB and PostgreSQL, plus working experience with Redis.
• Experience developing and integrating RESTful APIs.
• Exposure to AI/LLM integrations or AI-powered applications.
• Working knowledge of Docker and CI/CD practices.
• Experience with at least one cloud platform: AWS, Azure, or GCP.
• Experience writing unit and integration tests.
• Experience working in Agile/Scrum teams.
• Experience conducting code reviews and mentoring junior developers.
• Good understanding of Git and collaborative development workflows.
• Strong debugging, problem-solving, and analytical skills.
• Ability to own tasks independently and deliver on time.
• Strong communication skills and ability to work with technical and cross-functional teams.

Good to Have

• Experience building MVPs, POCs, or demos to support product launches or client pitches.
• Experience implementing product analytics or event tracking (GA4, Mixpanel, PostHog) to measure feature adoption.
• Experience building go-to-market features such as user onboarding flows or payment/subscription integrations (Stripe, Razorpay).

What You'll Gain?

• End-to-end ownership of features across Frontend, Backend, API, and Database.
• Work on modern products and real-world engineering challenges.
• Exposure to AI, GenAI, and AI-powered applications in an AI-first environment.
• A voice in technical decisions, architecture discussions, and development practices.
• Close collaboration with developers, QA, product, and technical leadership.
• Opportunities to mentor engineers while growing your own expertise.

Why Join Codewinglet?

• Modern products and technologies in an AI-first engineering environment.
• Real-time AI projects, including AI Agents and GenAI systems.
• High-growth, fast-paced learning environment.
• Exposure to the latest technologies and live projects.
• Supportive and transparent leadership.
• Clear career growth and performance-based appraisals.
• Competitive, industry-aligned salary.
• Stable team culture with regular engagement activities.
• Flexible working hours and 5-day work week.
• On-time salary disbursement.