About Us:  Paytm is India's leading mobile payments and financial services distribution company. Pioneer of the mobile QR payments revolution in India, Paytm builds technologies that help small businesses with payments and commerce. Paytm’s mission is to serve half a billion Indians and bring them to the mainstream economy with the help of technology.  About Role: We are looking for a Senior Software Engineer to join the Gold Tech team and help design and implement highly scalable services powering Paytm Digital Gold. We are building reliable, high-availability financial products and need a senior engineer who can own modules end-to-end, raise the bar on code quality, and mentor junior engineers. Key Responsibilities: ● Design and build high-availability, fault-tolerant transactional systems for money-path flows. ● Deliver reliable solutions that handle massive data volumes, peak traffic, and strict latency/SLA requirements. ● Own problem-free execution of assigned modules — from design and implementation through production support. ● Drive code optimization, code quality, maintainability, test coverage, and observability (metrics, logging, alerting). ● Integrate with internal platforms and external bullion partners. ● Work with Kafka consumers/producers, schedulers, and stream processing topologies where applicable. ● Participate in code reviews, incident post-mortems, and on-call rotation for owned services. ● Mentor junior engineers and contribute to technical standards within the team. Skills Required: ● MS or BS/B.Tech in Computer Science or equivalent experience from a top college. ● 3–6 years of hands-on backend development experience. ● Strong hands-on experience in Core Java (collections, multithreading, concurrency) or Node.js with production-grade services. ● Proficiency in Spring Boot, Spring Data JPA, Hibernate (Java track) or Express.js, async patterns (Node track); comfort working across both is a plus. ● Strong working knowledge of MySQL (master/slave, query optimization) and at least one of Redis, Aerospike, Cassandra, or Elasticsearch. ● Experience with Kafka (producers/consumers, idempotency, retry/DLQ patterns) and/or Apache Storm or similar stream processing. ● Experience building REST APIs, handling distributed transactions, and designing for idempotency and eventual consistency. ● Solid data structures, algorithms, and problem-solving skills. ● Customer-focused, adapts well to change, collaborates across teams (Product, QA, SRE, Partner integrations). ● Proven performer in a high-energy, fast-paced environment; self-starter with minimal guidance. Good to Have: ● Experience in fintech, payments, or bullion/wealth domains. ● Familiarity with Quartz, Spring State Machine, Resilience4j, or Debezium CDC. ● Exposure to AWS, Datadog/Prometheus, CI/CD (Jenkins), and contract/integration testing. ● Experience migrating or maintaining legacy Node.js services alongside modern Java microservices. Why join us:  ● Because you get an opportunity to make a difference, and have a great time doing that  ● You are challenged and encouraged here to do stuff that is meaningful for you and for those we serve  ● You should work with us if you think seriously about what technology can do for people  ● We are successful, and our successes are rooted in our people's collective energy and unwavering focus on the customer, and that's how it will always be.  ● Learn more about the exciting work we do in Tech by reading our Engineering blogs  Compensation:  If you are the right fit, we believe in creating wealth for you. With enviable 500 mn+ registered users, 21 mn+ merchants and depth of data in our ecosystem, we are in a unique position to democratize credit for deserving consumers & merchants – and we are committed to it.  India’s largest digital lending story is brewing here. It’s your opportunity to be a part of the story!