Job DescriptionSDE-3 — Backend Engineer
NLocation: Mumbai (preferred) / Remote, India
NEmployment Type: Full time
NExperience: 6–10 Years
NAbout the Role
nWeare looking for a Senior Backend Engineer (SDE-3) to own the design, scalability, and reliability of Pepper's backend systems. You will operate at the intersection of engineering depth and product thinking — leading architecture decisions, building AI-native backend infrastructure, and mentoring a growing engineering team. This role is for someone who thinks in systems, not just services, and who treats agentic AI patterns as a natural part of contemporary backend design.
NKey Responsibilities
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Design and own backend systems and services that are scalable, secure, and highly available N
Lead technical architecture decisions — service decomposition, data modelling, API design, and system reliability N
Build and operate AI-native backend infrastructure — LLM orchestration layers, agentic pipelines, RAG systems, tool-use frameworks, and evaluation loops N




Define and enforce backend engineering standards, code quality practices, and security patterns N
Collaborate with product, frontend, and data teams to deliver complex, cross-functional features N
Own performance at scale — query optimisation, caching strategies, infrastructure bottlenecks N
Drive incident response, root cause analysis, and reliability improvements N
Mentor SDE-1 and SDE-2 engineers, grow technical depth across the team N

nMust-Have Skills
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Expert-level Node.Js backend development — services, APIs, event-driven architecture N
TypeScript — solid typing across backend services and shared libraries N
Deep experience with MySQL, PostgreSQL, and Redis — schema design, query optimisation, indexing, caching N
REST APIs and microservices architecture — design patterns, versioning, contract testing N
Solid understanding of system design — distributed systems, consistency, fault tolerance, scalab

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