#138512 - Backend Software Engineer - Payments
Lifted (an Upwork Company)
IndiaPosted 5 days agoDiscoveredMatch locked
RemoteContractor3+ years expDeveloper
About the role
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.
Key Responsibilities
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Implement production backend features for payment flows.
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Refactor legacy services, improve test coverage, and modernize APIs, including migrations from deprecated APIs.
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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.
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Clarify requirements with product managers and partner teams and deliver end-to-end solutions.
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Produce designs, API specifications, knowledge-transfer documentation, and runbooks for owned workstreams.
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Must-Have Skills
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3+ years of backend software engineering experience.
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Experience building and operating production backend services at scale.
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Strong proficiency in Java as the primary programming language, with Kotlin and Python as complementary skills.
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Hands-on experience with RESTful and GraphQL APIs, microservices, and event-driven systems.
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Payments, fintech, or billing domain experience, including gateways, processors, or payment service providers.
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Experience writing unit, integration, and contract tests.
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Agile/Scrum experience with sprint-based delivery.
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Ability to ramp quickly on an existing codebase with minimal guidance.
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Git-based version control and code review using GitLab.
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Hands-on experience with GitLab CI/CD pipelines.
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Relational database experience with MySQL and SQL.
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Distributed systems experience with message queues, asynchronous processing, and eventual consistency.
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Jira experience for task and sprint tracking.
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Experience building end-to-end backend payment flows in production, including charges, refunds, disputes, and webhooks.
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Legacy service refactoring or migration experience with regression testing.
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Experience resolving production incidents in payment or billing systems.
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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
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Experience in a large enterprise engineering organization.
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Experience with Spring Boot, Gradle, and service mesh technologies.
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PCI-DSS compliance, payment security, or financial data handling experience.
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Experience with Datadog observability tooling.
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Required Tools & Platforms
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Java, with Kotlin and Python as complementary languages.
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RESTful and GraphQL APIs, microservices, and event-driven systems.
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Git, GitLab, and GitLab CI/CD.
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MySQL and SQL.
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Message queues and asynchronous processing systems.
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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).
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IST support is required, preferably 10 AM to 7 PM IST.
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Remote contract engagement, 40 hours per week.
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Expected engagement through March 31, 2027; start date to be agreed.
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One opening is available.
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This is not currently a contract-to-hire opportunity.
Originally posted on Himalayas
Not included in the source posting: about the role, benefits.
Skills
ci-cdgitgraphqljavajirakotlinmysqlpythonrest-apisqlagilescrum
Who can apply
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