Senior Full Stack Engineer

BookMyMentor; Bengaluru; On-site; INR 1,000,000 - 1,500,000; Full time

Job summary

BookMyMentor is seeking a Senior Full Stack Engineer to lead product features end-to-end, ensuring seamless integration of UI and backend services. The ideal candidate will possess 4-6 years of experience and a deep understanding of application architecture, frontend frameworks like React, and backend API development.

In this role, you will collaborate with various teams to create efficient and enjoyable user experiences while also taking part in code reviews to maintain high engineering standards. Join us to shape the future of educational mentoring!

Qualifications

• 4–6 years of professional software development experience with frontend and backend expertise.
• Strong fundamentals in data structures, algorithms, OS, and networking.
• Experience designing APIs and debugging production services.

Responsibilities

• Own product features end‑to‑end, including APIs and UIs.
• Collaborate with design and product teams to gather user feedback.
• Lead code and design reviews to uphold engineering quality.

Skills

Software development experience

Frontend and backend proficiency

APIs and data models design

React or equivalent

Performance optimisation

Understanding of B2B SaaS

Education

CS degree or equivalent

Tools

Cypress

Playwright

AWS

Job description

Senior Full Stack Engineer

Senior Level (5+ years)

Posted 4/26/2026

As a Senior Full Stack Engineer at Zenskar, you will own product features end‑to‑end — from the data model to the pixel on the screen. You will bridge engineering and product, translating complex business workflows into interfaces that enterprise teams actually understand and enjoy using. You will not hand off to a frontend engineer — you own the full vertical, and you push back on specs when the UX does not make sense. Own product features end‑to‑end — complex configuration UIs, workflow builders, and operational dashboards for enterprise users. Build and maintain customer‑facing surfaces — SDKs, embeddable flows, and APIs that directly shape how clients experience Zenskar. Design frontend architecture — component structure, state management, performance optimisation, and accessibility. Build the backend APIs and data models for the features you own — no handoff boundary between UI and API. Debug production issues across the full stack — own the problem from symptom to root cause, not just the frontend layer. Collaborate with design, product, and customer success — hear feedback from real users and let it shape what you build next. Partner with the GenAI engineer to surface AI capabilities through clean, well‑designed product interfaces. Lead code and design reviews, setting the standard for full‑stack engineering quality at Zenskar.

Requirements

• Must have
• 4–6 years of professional software development experience, with strong depth on both frontend and backend, not frontend‑heavy with light backend exposure
• CS degree or equivalent with strong fundamentals in data structures, algorithms, OS, and networking
• Can describe hard problems they have solved on both sides of the stack — the why, the tradeoffs, and the outcome
• Backend depth: designed and owned APIs, services, and data models in production; can debug a broken service, not just call one
• Product‑quality frontend React (or equivalent), component architecture, state management, responsive design; can own the UI without a frontend specialist
• Product sense: you notice when a UX is confusing even if the code is correct
• Good to have
• Performance optimisation: has identified and fixed bottlenecks on both frontend (rendering, bundle size) and backend (query performance, API latency)
• Design sensibility: can produce polished UIs from wireframes or low‑fidelity specs without a designer in the loop
• B2B SaaS / enterprise software experience — understands the complexity of enterprise workflows and user expectations
• Early‑stage startup experience — comfortable shipping fast with limited design and product support
• Cloud platform experience (AWS preferred)
• Testing culture: Cypress or Playwright for E2E, meaningful unit coverage
• AI‑assisted development: uses tools like Cursor or GitHub Copilot as a force multiplier, not a crutch
• Experience with financial systems, billing platforms, or fintech applications
• Knowledge of SaaS business models and compliance frameworks
• API design and integration experience
• Prior experience working at a startup
• WHAT DRIVES YOU
• You feel the friction of a confusing UI as acutely as a slow query — both are bugs to you
• You own features, not layers; the API and the UI are both your problem
• You push back on specs when the UX does not make sense; you are a product partner, not just an implementer
• You can have a design conversation with a non‑technical stakeholder and a systems conversation with an engineer in the same meeting
• You take pride in shipping products that enterprise users actually enjoy working with

About the Company

Zenskar is an AI‑Native Order‑to‑Cash platform that automates billing, revenue recognition, collections, and SaaS metrics for modern finance teams. It offers unlimited pricing flexibility to set up subscriptions, usage‑based billing, or custom contracts without requiring developers, and with 200+ plug‑and‑play integrations and comprehensive migration support, companies can implement Zenskar in weeks rather than months.