SDE 3 (Backend)

SDE-3 Backend Engineer Location: Mumbai (preferred) / Remote, India Employment Type: Full-time Experience: 610 Years About the Rol eWe are 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 modern backend design . Key Responsibiliti esDesign and own backend systems and services that are scalable, secure, and highly availableLead technical architecture decisions service decomposition, data modelling, API design, and system reliabilityBuild and operate AI-native backend infrastructure LLM orchestration layers, agentic pipelines, RAG systems, tool-use frameworks, and evaluation loopsDefine and enforce backend engineering standards, code quality practices, and security patternsCollaborate with product, frontend, and data teams to deliver complex, cross-functional featuresOwn performance at scale query optimisation, caching strategies, infrastructure bottlenecksDrive incident response, root cause analysis, and reliability improvementsMentor SDE-1 and SDE-2 engineers, grow technical depth across the te am Must-Have Ski llsExpert-level Node.js backend development services, APIs, event-driven architectureTypeScript strong typing across backend services and shared librariesDeep experience with MySQL, PostgreSQL, and Redis schema design, query optimisation, indexing, cachingREST APIs and microservices architecture design patterns, versioning, contract testingSolid understanding of system design distributed systems, consistency, fault tolerance, scalabilityExperience with message queues and async processing (Kafka, RabbitMQ, BullMQ or equivalent)CI/CD pipelines, containerisation (Docker/Kubernetes), and production deployment practicesStrong testing discipline unit, integration, contract, and load testingAI-native thinking fluency with LLMs, prompt engineering, and agentic system desi gn. Strongly Prefe rredHands-on experience building and operating agentic AI systems in production orchestration (LangChain, LangGraph, CrewAI or equivalent), tool use, memory, and evaluation frameworksExperience with RAG pipelines, vector databases (Pinecone, Weaviate, pgvector), embedding models, chunking and retrieval strategiesMulti-model LLM integration, OpenAI, Anthropic, Gemini, open-source models with guardrails and fallback patternsExposure to data platform engineering or ML infrastructure is a p lus. What Success Looks LikeYou independently lead and deliver complex backend systems end to endYour architecture decisions hold up at scale, performance, reliability, and maintainabilityYou are the go-to person for production issues, system design reviews, and backend standardsYou are a multiplier for the team engineers around you get better because of youYou bring AI into the backend not as an integration, but as a design instinct, agentic patterns, LLM tooling, and intelligent automation are part of how you think SDE-3 Backend Engineer Location: Mumbai (preferred) / Remote, India Employment Type: Full-time Experience: 610 Years About the Rol eWe are 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 modern backend design . Key Responsibiliti esDesign and own backend systems and services that are scalable, secure, and highly availableLead technical architecture decisions service decomposition, data modelling, API design, and system reliabilityBuild and operate AI-native backend infrastructure LLM orchestration layers, agentic pipelines, RAG systems, tool-use frameworks, and evaluation loopsDefine and enforce backend engineering standards, code quality practices, and security patternsCollaborate with product, frontend, and data teams to deliver complex, cross-functional featuresOwn performance at scale query optimisation, caching strategies, infrastructure bottlenecksDrive incident response, root cause analysis, and reliability improvementsMentor SDE-1 and SDE-2 engineers, grow technical depth across the te am Must-Have Ski llsExpert-level Node.js backend development services, APIs, event-driven architectureTypeScript strong typing across backend services and shared librariesDeep experience with MySQL, PostgreSQL, and Redis schema design, query optimisation, indexing, cachingREST