Senior Full Stack Engineer

Senior Full Stack Engineer Senior (5+ Years) Mumbai, India Full-time, on-site 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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