Senior Backend Engineer - API Development and Integration

TENARAI TECHNOLOGIES PRIVATE LIMITED; Bengaluru; On-site; INR 1,200,000 - 1,800,000; Full time

Job summary

TENARAI TECHNOLOGIES PRIVATE LIMITED is seeking a seasoned backend developer for a 1-year contract in Bangalore. You will build production backend services using Node.js and TypeScript, with NestJS or Express/Fastify, integrating third-party APIs and ensuring multi-tenant SaaS patterns.

Key focus areas include cloud deployment on AWS, Docker, ECS, API security with OAuth2/JWT, and maintaining robust data models in PostgreSQL and MongoDB.

Qualifications

• Hands-on experience building production backend services using Node.js and TypeScript with NestJS, Express, or Fastify.
• Direct experience integrating third-party APIs (Payment gateways, CRM platforms, Unified APIs).
• Proven experience with tenant isolation strategies in multi-tenant SaaS.
• Strong production experience with AWS (or Azure/GCP) using Docker, AWS ECS (Fargate/EC2), and ALB integration.
• Hands-on experience with PostgreSQL and MongoDB data modeling, partitioning, and indexing.
• Hands-on experience with contract-first development (OpenAPI / JSON Schema) and applied AI tools across coding and testing workflows.
• Solid foundation in SOLID principles, OOP, and microservice design patterns.
• Expertise in OAuth2/OIDC, JWT, OWASP API Top 10, Git, and CI/CD pipelines.

Skills

Node.js

TypeScript

NestJS

Express

Fastify

OAuth2/OIDC

JWT

API Security

SOLID Principles

OOP

Microservices

OpenAPI

JSON Schema

CI/CD

Git

Cloud & DevOps

Tools

AWS

Docker

AWS ECS

ALB

PostgreSQL

MongoDB

OpenAPI

JSON Schema

Job description

CONTRACT POSITION

Duration: 1 Year

Experience Range: 6 to 20 Years

Work location: Bangalore

Mode of work: Hybrid

Mandatory Qualifications

• Technical Expertise: Hands-on experience building production backend services using Node.js and TypeScript with NestJS, Express, or Fastify.
• Integrations Experience: Direct experience integrating third-party APIs (Payment gateways, CRM platforms, Unified APIs).
• Multi-Tenant SaaS: Proven experience with tenant isolation strategies (shared, siloed, hybrid) and noisy-neighbor mitigation.
• Cloud & Containers: Strong production experience with AWS (or Azure/GCP) using Docker, AWS ECS (Fargate/EC2), and ALB integration.
• Databases: Hands-on experience with both RDBMS (PostgreSQL) and NoSQL (MongoDB) data modeling, partitioning, and indexing.
• Spec-Driven & AI SDLC: Hands-on experience with contract-first development (OpenAPI / JSON Schema) and applied AI tools across coding and testing workflows.
• Design Principles: Solid foundation in SOLID principles, OOP, and microservice design patterns.
• API Security & Version Control: Expertise in OAuth2/OIDC, JWT, OWASP API Top 10, Git, and CI/CD pipelines.