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 environments
- 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 remote work culture

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