About The Role Osstap is seeking a Senior Backend Engineer to architect cloud-native distributed backend services that power high-concurrency client products. You will tackle real-world scalability challenges, design fault-tolerant data pipelines, and ensure sub-50ms API latencies under heavy enterprise load.

Key Responsibilities
Design, implement, and scale backend services in Go, Node.js/TypeScript, or Python
Model relational and non-relational database schemas using PostgreSQL, Redis, and message queues
Implement event-driven architectures with Kafka, RabbitMQ, or AWS SQS/SNS
Build secure authentication, rate limiting, and observability with OpenTelemetry and Prometheus
Partner with frontend and mobile teams to define clean API contracts and data models
Troubleshoot distributed system bottlenecks and execute root-cause post-mortems

Qualifications & Requirements
5+ years designing and running backend services in production settings
Robust proficiency in Go or TypeScript/Node.js,



with solid fundamentals in concurrent programming
Deep experience with PostgreSQL (query optimization, indexing, connection pooling, migrations)
Hands-on experience with cloud providers (AWS or GCP) and containerization (Docker, Kubernetes)
Understanding of distributed system patterns: idempotency, circuit breakers, distributed locking
Commitment to test-driven engineering and robust automated CI/CD pipelines

Nice to Have
Familiarity with gRPC and Protocol Buffers
Experience with high-scale analytics engines such as ClickHouse or Snowflake
Experience working with AI/LLM integration APIs and vector databases

What We Offer Market-leading salary package with performance bonuses

Top-tier Apple Silicon MacBook Pro and workstation setup

Annual conference and learning budget

Comprehensive medical insurance for employee and dependents

High-autonomy work from home culture

📌 Senior Backend Engineer Kolkata Metropolitan Area
🏢 OSSTAP
📍 Kolkata Metropolitan Area