Back End Developer

6 days ago

Najafgarh, India Jumbo Full time

About the Company:

Jumbo is pioneering the future of gaming with the world's only
No Money Loss Gaming
app. Our innovative platform allows users to win money by playing games without the risk of losing their stake, even if they don't win the game.

Imagine playing a game of Poker with ₹1,000 which you end up losing. What if you could reuse those ₹1,000 to buy a Domino's Pizza? Or to watch a movie at PVR, or buy your favorite headphones?

About the Role:

We're looking for a 
mid-level Backend Engineer
 to join our founding team. You'll own backend systems, APIs, and infra on AWS. You'll be solving problems across scalability, fraud detection, and real-time data processing — with huge ownership from day one.

Job Details:

  • Work Schedule: 6 days a week
  • Location: On-site, South Delhi

Responsibilities:

  • Design and build scalable 
    APIs and microservices
     with 
    (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, , 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:

  • 2–4 years of experience in backend roles (consumer or transactional products)
  • Strong expertise in 
     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

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