Back End Developer

Jumbo; Delhi; On-site; INR 800,000 - 1,000,000; Full time

Job summary

A forward-thinking tech startup is seeking a mid-level Backend Engineer in Delhi, India. In this role, you will own backend systems and APIs, working with technologies like Node.js/NestJS and AWS. The ideal candidate has 2-4 years of experience, with a strong focus on API design and deploying applications on AWS. You will tackle challenges in scalability, data processing, and fraud detection while collaborating across teams to create secure and high-performance systems.

Qualifications

• 2-4 years of experience in backend roles, especially consumer or transactional products.
• Strong expertise in Node.js/NestJS and API design (REST/GraphQL).
• Hands-on experience deploying to AWS (Lambda, RDS, S3, etc.).

Responsibilities

• Design and build scalable APIs and microservices with Node.js/NestJS.
• Architect and maintain secure, high-performance backend systems.
• Work with large datasets using Postgres, MongoDB, Redis, and Kafka.

Skills

Node.js/NestJS

API design (REST/GraphQL)

AWS deployment

Postgres

Redis

MongoDB

Kafka

Data structures and algorithms

Job description

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.

• Experience: 2-5 Years
• Work Schedule: 6 days a week

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

• 2–4 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

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.