Back End Developer

About the Role:

mid-level Backend Engineer

Job Details:

• Experience: 2-5 Years
• Work Schedule: 6 days a week
• Location: On-site, South Delhi

Responsibilities:

• Design and build scalable

  APIs and microservices

  with

  Node.js/NestJS (serverless on AWS Lambda)

• Architect and maintain

  secure, high-performance backend systems

• Work with large datasets across

  Postgres, MongoDB, Redis

  , and integrate event-driven systems with

  Kafka

• Implement and optimize

  fraud detection & prevention logic

  to protect platform integrity
• Set up

  monitoring and alerting systems

  for reliability, performance, and security
• Collaborate with frontend (React Native, Next.js, Reanimated, Redux Toolkit, React Query) to deliver seamless experiences
• Ensure compliance with

  data protection and security best practices

• Participate in code reviews, testing, and documentation

Requirements:

• 24 years of experience in backend roles (consumer or transactional products)
• Strong expertise in

  Node.js/NestJS

  and API design (REST/GraphQL)
• Hands-on experience deploying to

  AWS

  (Lambda, RDS, S3, CloudFront, infra automation)
• Strong working knowledge of

  Postgres, Redis, MongoDB

  in production
• Experience with

  Kafka

  or similar messaging systems
• Understanding of

  fraud detection algorithms, real-time data processing, and system security

  (preferred)
• Solid grasp of

  data structures, algorithms, and system design

• Comfortable in a

  fast-paced startup

  with ownership of end-to-end delivery