Software Development Engineer — Backend (SDE Backend)

Juspay is India's premier payment infrastructure provider, powering billions of transactions for the country's biggest e‑commerce, travel, and on‑demand platforms such as Amazon, Flipkart, Swiggy, Uber, and MakeMyTrip. With a multi‑data‑center, highly distributed architecture, Juspay delivers a 99.999% uptime, handling millions of payments every day across UPI, card, wallet, and hybrid payment flows. The company’s engineering culture is deeply rooted in functional programming, low‑code/no‑code innovation, and a relentless focus on reliability at massive scale. As a Software Development Engineer – Backend, you will join Juspay’s Centers of Excellence where you will be responsible for building and evolving the core payment infrastructure that underpins India’s digital economy. You will work on both framework development and business enablement, creating reusable components, internal platforms, and self‑service tools that accelerate product delivery for internal teams and external partners. The role offers exposure to real‑time transaction processing, intelligent traffic routing, and self‑healing systems that learn from billions of data points. **Key Responsibilities** 1. Design, develop, and maintain flexible business‑logic modules for UPI, card, and wallet integrations. 2. Build low‑code/no‑code platforms within Juspay’s proprietary framework to speed up application development. 3. Contribute to the high‑availability backbone (99.999% uptime) across multi‑DC deployments. 4. Implement intelligent traffic routing, anomaly detection, and self‑healing mechanisms using transaction data. 5. Architect scalable backend services for real‑time payment processing and settlement. 6. Develop and expose developer‑friendly internal APIs and self‑service portals. 7. Optimize performance, latency, and throughput of critical payment pipelines. 8. Participate in code reviews, testing, and continuous integration pipelines. 9. Collaborate with product, security, and operations teams to ensure compliance and robustness. 10. Mentor junior engineers and contribute to the functional‑programming culture. **Tech Stack**: Functional languages (Scala, Kotlin), Java, RESTful APIs, HTTP/HTTPS, PostgreSQL/MySQL, Redis, Kafka, Docker, Kubernetes, Linux, Git, CI/CD tools. **Growth Path**: Starting as an SDE‑1, you can progress to SDE‑2, SDE‑3, and eventually to Technical Lead or Architecture roles, with opportunities to lead critical payment products or own entire platform domains. **Why Join Juspay**: You will work on systems that process billions of real transactions daily, learn cutting‑edge functional programming practices, and be part of a flat, engineering‑first organization that rewards innovation with competitive compensation, ESOPs, and a culture that encourages rapid learning and impact.