Senior Backend Engineer

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

Job summary

BookMyMentor is seeking a Senior Backend Engineer to design systems that are critical for B2B clients, emphasizing correctness, reliability, and security.

The ideal candidate will have 4-6 years in software development, possess a strong CS background, and be proficient in backend languages. Responsibilities include core service design, production debugging, and mentoring within the team. Join us to shape the future of our platform and client interactions.

Qualifications

• 4-6 years of professional software development experience building production systems.
• Strong fundamentals in data structures, algorithms, OS, and networking.
• Proficient in at least one backend language.
• Experience with security and compliance frameworks.

Responsibilities

• Design and build core platform services handling complex business logic.
• Architect and own integrations with external enterprise systems.
• Own production debugging end-to-end and diagnose issues across services.
• Mentor engineers and lead design and code reviews.

Skills

Software development

System design

Data structures

Algorithms

Observability

Event-driven architectures

Cloud deployment

API design

Containerization

Education

CS degree or equivalent (B.Tech/B.E./B.S.)

Tools

Docker

Kubernetes

AWS

Kafka

GitHub Actions

Job description

Zenskar is building the operational backbone for how B2B companies run their business. As a Senior Backend Engineer, you will work on the hardest class of problems we have: systems where correctness is non‑negotiable, scale is unforgiving, and the edge cases never stop coming. This is not a feature‑factory role - you will design systems from first principles, make architectural calls that shape the platform for years, and push back when requirements are wrong. Design and build core platform services that handle complex business logic reliably at scale. Architect and own integrations with external enterprise systems - each with its own quirks, rate limits, and failure modes. Build APIs that enterprise engineering teams love integrating with, not just ones that technically work. Own production debugging end‑to‑end - diagnose issues across services using logs, traces, and metrics; make incidents boring, not fires. Work closely with product, implementation, and customer success - not as an order‑taker, but as the engineer who understands the system deeply enough to push back. Embed security and compliance thinking into your systems by default - not as a retrofit. Lead design reviews and code reviews, setting the architectural standard for your domain. Mentor engineers around you - raise the bar without slowing the team down.

Impact You’ll Make

Your systems will be the foundation that Zenskar’s enterprise clients depend on - correctness and reliability at this layer directly affects how they run their business. Architectural decisions you make now will define how the platform scales over the next several years. You will shorten the time from “new enterprise requirement” to “production‑ready system” - enabling the company to move faster without breaking things. You will raise the engineering quality bar for the team around you through the standards you set and the code you ship. You will work on problems that don’t have obvious solutions - and your judgment will determine the outcome.

Requirements

• Must have:
• 4-6 years of professional software development experience building production systems at real companies
• CS degree or equivalent (B.Tech/B.E./B.S.) - strong fundamentals in data structures, algorithms, OS, and networking
• Can describe the hard problems they have solved, why they were difficult, and what changed as a result — not just a list of technologies used
• Proficient in at least one backend language — language matters less than depth and engineering judgment
• Strong system design instincts — can reason through tradeoffs, failure modes, and long‑term maintainability under pressure
• Good to have:
• Hands‑on observability — comfortable diagnosing complex issues across distributed services using logs, traces, and performance metrics; not just setting up dashboards
• Security and compliance awareness — SOC 2, DPDPA, or similar; understands the engineering implications, not just the checkbox
• Experience with event‑driven architectures — Kafka, NATS, or RabbitMQ in production
• Cloud platform experience (AWS preferred) - deploying and operating services at scale
• Early‑stage startup experience — comfortable with ambiguity, evolving requirements, and wearing multiple hats
• B2B SaaS / enterprise software background — multi‑tenant systems, external integrations, enterprise workflows
• Strong testing culture — unit, integration, and e2e as a default, not an afterthought
• Containerization and CI/CD — Docker, Kubernetes, GitHub Actions
• AI‑assisted development — uses tools like Cursor or GitHub Copilot to move faster without compromising quality
• 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
• Not taking yourself too seriously :
• WHAT DRIVES YOU:
• You can go deep on the hard problems you have solved — the why, the tradeoffs, the outcome
• You ask “what happens when this fails?” before shipping anything
• You own problems, not tasks — you follow through until the system is healthy, not just until the PR is merged
• You have strong opinions on system design but hold them loosely — you change your mind when the evidence does
• You thrive in a fast‑moving environment where the requirements evolve and the answers aren’t always obvious