Back End Developer

About the Role:

Were looking for amid-level Backend Engineerto join our founding team. Youll own backend systems, APIs, and infra on AWS. Youll be solving problems across scalability, fraud detection, and real-time data processing with huge ownership from day one.

Job Details:

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

Responsibilities:

• Design and build scalableAPIs and microserviceswithNode.js/NestJS (serverless on AWS Lambda)
• Architect and maintainsecure, high-performance backend systems
• Work with large datasets acrossPostgres, MongoDB, Redis, and integrate event-driven systems withKafka
• Implement and optimizefraud detection & prevention logicto protect platform integrity
• Set upmonitoring and alerting systemsfor reliability, performance, and security
• Collaborate with frontend (React Native, Next.js, Reanimated, Redux Toolkit, React Query) to deliver seamless experiences
• Ensure compliance withdata protection and security best practices
• Participate in code reviews, testing, and documentation

Requirements:

• 25 years of experience in backend roles (consumer or transactional products)
• Strong expertise inNode.js/NestJSand API design (REST/GraphQL)
• Hands-on experience deploying toAWS(Lambda, RDS, S3, CloudFront, infra automation)
• Strong working knowledge ofPostgres, Redis, MongoDBin production
• Experience withKafkaor similar messaging systems
• Understanding offraud detection algorithms, real-time data processing, and system security(preferred)
• Solid grasp ofdata structures, algorithms, and system design
• Comfortable in afast-paced startupwith ownership of end-to-end delivery

At Jumbo, we are proud to offer equal opportunities to all. We embrace diversity and inclusion in every aspect of our work.

We are committed to creating an inclusive workplace that respects every individual, regardless of race, gender, sexual orientation, gender identity, religion, age, disability, or background.everyone is welcome here.