Senior Full Stack Engineer Senior (5+ Years) Mumbai, India Full-time, in office Apply for this role Overview

Unico Connect is seeking a Senior Full Stack Engineer to architect and ship complex client features end-to-end. The role spans frontend architecture, backend system design, multi-database ownership, and the mentorship that scales the engineering practice. The position is well suited to senior engineers who can balance performance, type-safety, observability, and shipping velocity at production scale.

Key Responsibilities

- Architect and ship complex full-stack initiatives end-to-end
- Lead technical scoping with Product Managers and the Tech Lead
- Mentor 2-3 junior full-stack engineers through code reviews, design reviews, and 1:1s
- Drive performance optimisation across frontend (Core Web Vitals) and backend (P95 latency)
- Own production incidents and post-mortems; build resilience patterns
- Set frontend and backend standards including testing, observability, security, and type-safety
- Partner with DevOps on deployment, scaling, and on-call practices
- Lead architecture conversations for owned products including ADRs and design reviews
- Govern security posture for owned services including OWASP and SAST tooling
- Calibrate the full-stack interview bar and conduct senior interview loops
- Author internal full-stack playbooks and onboarding documentation

Required Qualifications

- 5+ years of full-stack engineering with at least 2 in a senior role
- Deep React and Next.js (App Router, server components, streaming)
- Strong Node.js with TypeScript or Python; production patterns ideally in both
- Multi-database experience (PostgreSQL, MySQL,



MongoDB)
- Hands-on with Vercel, GCP, or AWS deployments at production scale
- Excellent code review, mentorship, and written communication skills
- Track record of owning at least 1 product at production scale (multi-tenant, high QPS, or regulated)
- Experience leading architecture decisions across both frontend and backend
- Capacity to balance product, performance, and engineering trade-offs
- Bachelor's degree in Computer Science, Engineering, or a related field

Preferred Qualifications

- Edge functions and server-side streaming experience
- Real-time features (WebSockets, WebRTC, Server-Sent Events)
- Web Workers, service workers, and PWA experience
- Open-source contributions or technical writing
- Conference talks

AI Tools Proficiency Production engineering at Unico Connect assumes AI tools form part of the daily workflow rather than an experimental augmentation. For this role specifically:

- Claude Code or Cursor as the default integrated development environment
- v0 or Bolt for rapid frontend prototyping
- AI-assisted refactoring and code review tooling
- Perplexity for technical research during architecture decisions





Required Skills React 18+Next.js (App Router)TypeScriptTanStack QueryTailwind / CSS-in-JSNode.js / NestJS / FastifyPython / FastAPIPostgreSQL / MySQL / MongoDBRedis Benefits

- Hybrid working model — 1 day work-from-home per week
- MacBook Pro and external monitor for work
- Paid subscriptions to Claude, ChatGPT, and Cursor
- Team events, offsites, and outings
- Referral bonus when you bring in a successful hire

What we look for at Unico Connect Every Unico role expects the same underlying traits — regardless of department or seniority. If these resonate, apply.

AI-augmented by default Fluent with Claude, ChatGPT, Cursor, Figma AI, or whatever is relevant to your craft. We expect AI tools in the loop, not as a novelty.

Comfortable with startup pace Fast cycles, real ownership, low ceremony. You will not be a cog.

Driven by value creation Output and outcomes matter more than process. You ship work that moves a metric.

Ownership mindset You treat the codebase, the deliverable, and the client relationship as your own.

Builder energy You joined because you want to ship amazing tech products, not warm a seat.

Ready to build the future?

Join our team of engineers and help us shape the next generation of AI-native software for clients across the globe.

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📌 Senior Full Stack Engineer (Mumbai)
🏢 Unico Connect
📍 Mumbai