Senior Software Developer in Test, Payments

Senior Software Developer in Test, Payments What we’re looking for We are seeking a talented, endlessly curious individual to join our team. You’ll be working closely with one of our portfolio companies in the fintech sector as part of the Engineering department. This company is a leading B2B fintech platform in its field, processing over US$2B across multiple currencies annually. We’re looking for individuals who are driven to create meaningful value, take full ownership of what they build, and thrive in a fast-paced, high-growth environment. If you’re motivated by impactful work and eager to be part of an innovative team, we’d love to hear from you. What You’ll Do Design, build, and maintain automated test frameworks for backend services, APIs, and critical frontend flows Define and execute automation strategies for complex payment workflows, including asynchronous callbacks, retries, and failure scenarios Work closely with backend and frontend engineers to ensure systems are testable, observable, and well-covered by automation Integrate automated tests into CI/CD pipelines, helping define quality gates for releases Use tools such as n8n, Zapier, or similar workflow automation platforms to: Orchestrate end-to-end test scenarios across multiple services Simulate third-party providers and callback flows Automate reconciliation and data validation checks Write automations to help team improve on recurring tasks Apply AI-assisted tools to support test case creation, failure analysis, and identification of coverage gaps where appropriate Identify, document, and help resolve quality issues, working closely with engineers to prevent recurrence Contribute to incident analysis and root cause investigations, ensuring gaps are addressed through improved automation Mentor and support other engineers and QAs in automation and testing best practices Maintain clear documentation for test frameworks, workflows, and quality standards What you should have Bachelor’s degree in Computer Science, Engineering, or a related field 5+ years of experience as an SDET, test automation engineer, or software engineer with a strong testing focus Strong programming skills in one or more of Go, Python, or JavaScript/TypeScript Experience with API and backend testing in production systems Good understanding of distributed systems, asynchronous workflows, and event-driven architectures Hands-on experience integrating automated tests into CI/CD pipelines Familiarity with test automation frameworks and tools (API-first; UI testing where necessary) Strong communication skills, with the ability to work effectively across engineering, product, and QA teams Bonus Prior experience working in fintech, payments, or regulated systems Experience using n8n, Zapier, or other workflow automation tools Experience applying AI or LLM-based tools to testing, debugging, or quality analysis Familiarity with AWS-based infrastructure Experience writing technical or testing documentation such as test strategies, RFCs, or ADRs About Us Xenith is a B2B payment service provider focused on enabling seamless cross-border commerce. With an MSB license in Canada and PJP III license in Indonesia, we offer global merchants a one-stop solution to manage multi-currency payments - with a strong focus on alternative payment methods in emerging markets. Our deep regional expertise and strong partnerships with top local gateways, we simplify the complexity of fragmented payment landscapes, helping global merchants expand faster and more efficiently. At Xenith, we believe in building a culture where people feel empowered, trusted, and challenged to do their best work. Join us as we build the financial infrastructure of tomorrow! Department Engineering Role Software Developer in Test (SDET) Locations Indonesia Remote status Hybrid