Back End Engineer

Backend Engineer - Integration Specialist

Company: Cobay Technology Private Limited

Location:
Coimbatore, Tamil Nadu (On-site)

Experience:
2 - 4 years

Team:
Platform Engineering Team

About the Role

We're seeking a talented
Senior Backend Engineer
with strong integration expertise to architect and build the core infrastructure of our multi-tenant SaaS platform. You'll be responsible for designing scalable backend systems and creating robust integrations with various third-party services and APIs.

As our Backend Engineer, you'll work on high-throughput systems processing millions of transactions daily, building RESTful APIs, implementing event-driven architectures, and ensuring our platform maintains 99.9% uptime while scaling to meet growing demands.

This role is perfect for someone who:

• Gets excited about building scalable backend architectures
• Thrives on making disparate systems communicate seamlessly
• Takes pride in writing clean, maintainable, and performant code
• Enjoys solving complex distributed systems challenges

Key Responsibilities

Backend Development

• Design and implement RESTful and GraphQL APIs for internal and external consumption
• Build robust webhook handlers for real-time event processing
• Develop authentication and authorization systems (OAuth 2.0, JWT, API keys)
• Create data transformation and validation layers for diverse data formats
• Implement resilient systems with retry mechanisms, circuit breakers, and graceful degradation

System Architecture & Design

• Architect scalable microservices supporting a multi-tenant SaaS architecture
• Design event-driven systems using message queues for asynchronous processing
• Build reusable libraries and frameworks for rapid feature development
• Optimize database queries and implement efficient caching strategies
• Design systems capable of handling 10,000+ concurrent requests
• Build comprehensive monitoring, logging, and alerting systems

Collaboration & Leadership

• Collaborate with frontend teams to design optimal API contracts
• Mentor junior developers on backend best practices
• Participate in architecture reviews and technical decision-making

Technical Requirements

• Backend Development
  : 2+ years building production APIs with and Expert-level understanding of RESTful design, microservices architecture, and event-driven systems. Strong proficiency in JavaScript/TypeScript and asynchronous programming patterns.

• Database & Data Management
  : Expertise in both NoSQL (MongoDB - aggregation pipelines, indexing, sharding) and SQL databases. Experience with caching strategies (Redis), query optimization, and handling high-volume transactions (10,000+ concurrent requests).

• Integration & APIs
  : Proven experience building robust third-party integrations, webhook handlers, and API gateways. Strong knowledge of authentication patterns (OAuth 2.0, JWT), rate limiting, and API versioning

• Cloud & DevOps
  : Hands-on experience with AWS services (EC2, Lambda, S3, SQS, EventBridge), Docker containerization, and CI/CD pipelines.

• Performance & Reliability
  : Expertise in building resilient systems with circuit breakers, retry mechanisms, and graceful degradation. Experience with monitoring tools (DataDog, New Relic), distributed tracing, and maintaining 99.9% uptime for production systems.

• Testing & Code Quality
  : Strong testing practices with 80%+ code coverage, experience with TDD/BDD methodologies. Proficient in Git workflows, code review processes, and maintaining high code quality standards using tools like ESLint and SonarQube.

• Bonus Skills
  : GraphQL, Kubernetes orchestration, serverless architectures (AWS Lambda), event sourcing and CQRS patterns, multi-tenant SaaS architecture, and experience with high-throughput systems.