#138512 - Backend Software Engineer - Payments

We are seeking a backend software engineer for a remote contract engagement building and operating scalable, revenue-critical payment infrastructure. You will deliver payment features, reduce technical debt, and modernize services while collaborating with engineers, product managers, and partner teams. Enterprise experience strongly preferred. Key Responsibilities • Implement production backend features for payment flows. • Refactor legacy services, improve test coverage, and modernize APIs, including migrations from deprecated APIs. • Deliver clean, well-tested, production-ready code with passing CI/CD pipelines and peer-review approval. • Deliver initiatives within agreed sprint cycles and participate in code reviews, design discussions, and sprint ceremonies. • Clarify requirements with product managers and partner teams and deliver end-to-end solutions. • Produce designs, API specifications, knowledge-transfer documentation, and runbooks for owned workstreams. • Support maintainability and a smooth handoff to the engineering team at the conclusion of the engagement. Must-Have Skills • 3+ years of backend software engineering experience. • Experience building and operating production backend services at scale. • Strong proficiency in Java as the primary programming language, with Kotlin and Python as complementary skills. • Hands-on experience with RESTful and GraphQL APIs, microservices, and event-driven systems. • Payments, fintech, or billing domain experience, including gateways, processors, or payment service providers. • Experience writing unit, integration, and contract tests. • Agile/Scrum experience with sprint-based delivery. • Ability to ramp quickly on an existing codebase with minimal guidance. • Git-based version control and code review using GitLab. • Hands-on experience with GitLab CI/CD pipelines. • Relational database experience with MySQL and SQL. • Distributed systems experience with message queues, asynchronous processing, and eventual consistency. • Jira experience for task and sprint tracking. • Experience building end-to-end backend payment flows in production, including charges, refunds, disputes, and webhooks. • Legacy service refactoring or migration experience with regression testing. • Experience resolving production incidents in payment or billing systems. • Experience designing internal APIs consumed by multiple downstream services. • Ability to own feature delivery with minimal supervision and collaborate asynchronously with distributed, cross-functional teams. Nice-to-Have Skills • Experience in a large enterprise engineering organization. • Experience with Spring Boot, Gradle, and service mesh technologies. • PCI-DSS compliance, payment security, or financial data handling experience. • Experience with Datadog observability tooling. • Open-source contributions or a portfolio of shipped payment features. Required Tools & Platforms • Java, with Kotlin and Python as complementary languages. • RESTful and GraphQL APIs, microservices, and event-driven systems. • Git, GitLab, and GitLab CI/CD. • MySQL and SQL. • Message queues and asynchronous processing systems. • Jira. Location, Time & Engagement • Candidates must be based in India or a nearby eligible APAC location no more than two hours ahead of or behind India Standard Time (IST). • IST support is required, preferably 10 AM to 7 PM IST. • Remote contract engagement, 40 hours per week. • Expected engagement through March 31, 2027; start date to be agreed. • One opening is available. • This is not currently a contract-to-hire opportunity. Originally posted on Himalayas