Job Description

About the Role

As a Senior Backend Engineer at Sage, you will be responsible for building, enhancing and maintaining a high-quality SaaS solution that exceeds customer and business partner expectations. You will proactively share your own knowledge for specific technical solutions and business processes in your area of responsibility. We are looking for someone with 7+ years of skilled experience in backend engineering. Proficiency in English, written and verbal, is required.

We value humility and collaboration. We are looking for people who can work as part of a team, not in silos. We expect engineers to take ownership beyond just writing code, including tests, documentation, and long-term code quality.

Location: Bangalore, India. This is a hybrid role, three days per week in the office.

Required Skills

Core languages & runtime

• Strong TypeScript (strict mode) and Node.js (v24+) for production services.
• Solid computer-science fundamentals: data structures, algorithms, concurrency, async I/O.

Backend frameworks & APIs





• REST API design with Fastify (or Express/NestJS/Koa with willingness to learn Fastify).
• JSON Schema contract design and validation (AJV or equivalent); OpenAPI/Swagger.
• Understanding of API versioning, idempotency, pagination, and error-handling patterns.

Data & persistence

• Relational databases MySQL and/or PostgreSQL: schema design, indexing, query tuning.
• Comfort with JSON-document modeling in a relational store and query compilation to SQL.
• SQL query builders (Knex or similar); parameterized queries and SQL-injection prevention.
• Caching with Redis.

Distributed systems & messaging

• Event-driven / message-queue systems (AWS SQS, or Kafka/RabbitMQ/SNS equivalents): producer/consumer patterns, dead-letter queues, retries/backoff, and idempotency.
• Designing for at-least-once delivery and eventual consistency.

Cloud & platform

• AWS services (SQS, EFS, S3, IAM, ECR) in a production context.
• Contain

📌 Senior Engineer (Bengaluru)
🏢 Sage
📍 Bengaluru