Engineer Software Developer

About the Role: Remitian is looking for a high-agency Staff Software Engineer to join our Payments team and own the systems that move money on our platform. The Payments team owns everything from a tax obligation becoming a payment through to the ledger that records every transaction: banking integrations and fee charges, automated payment integrations with tax authority portals, support for new payment types and tax authorities as the platform expands, and the subscription system for taxpayers and firms. Its mission is to make tax payments reliable, traceable, and effortless, no matter the payment type or tax authority behind it. This is a staff-level role, which means your scope spans the payments platform rather than a single feature area. You will work closely with the Payments team lead and the rest of the team on the design of our money-movement systems, contribute to the standards and patterns we build on, and help deliver work that reaches across team boundaries. You will write a lot of code, and you will add leverage through the design decisions you shape and the engineers you help grow along the way. You will work across the stack, from data models and services through to the surfaces our customers and internal teams use. This role is based in Florida, with Miami preferred, on a hybrid schedule of 3 to 4 days per week in office. Own money-movement workflows end to end, from a tax obligation becoming a payment through settlement and its record in the ledger Own the banking integrations, fee charges, and transaction ledger that keep every movement of money accounted for Design and evolve our automated payment integrations with tax authority portals, and make them reliable, observable, and recoverable Drive support for new payment types and new tax authorities, turning each addition into repeatable patterns rather than one-off builds Treat idempotency, reconciliation, and exact accounting as first-class design constraints rather than afterthoughts Help shape technical direction for the Payments team alongside the team lead, and align it with the broader engineering roadmap Make and defend trade-offs around performance, scalability, security, correctness, and maintainability, and write those decisions down Full-Stack Product Development Design, build, and ship complex features across the stack, from data models and services through to UIOwn the shared services other engineering teams depend on, and treat those teams as customers Reliability, Security, and Production Operations Own payments services in production, including their reliability, performance, and operational behaviour Bring a security-first mindset to money movement, banking credentials, and sensitive taxpayer data in every review and design decision Take real ownership of major areas of the payments platform and be accountable for their outcomes Push back, raise concerns, and surface ideas that improve the platform or how the team works 8+ years of experience as a software engineer, with a track record of designing and operating production systems at scale~ Proven experience building and operating payments or money-movement systems, such as ledgers, banking integrations, or payment rails, where correctness and reconciliation were part of your responsibility~ Deep, hands-on proficiency building production applications with C# and .NET, plus modern JavaScript or TypeScript~ Strong experience using LLMs and AI tooling to ship features and accelerate development~ Strong systems-oriented judgement across performance, scalability, security, correctness, and reliability~ Excellent communicator, able to write a clear design document and explain trade-offs to engineers, executives, and non-technical audiences alike~ Excited by a fast-paced startup where priorities shift and ambiguity is part of the job Experience at a payments, banking, or financial infrastructure company where moving money was the product Hands-on experience with double-entry ledgers, reconciliation, or settlement systems Hands-on experience with AWS and modern CI/CD pipelines at scale Security experience such as secure coding, threat modelling, or working in a regulated environmentNET front-end frameworks Experience with tax, compliance, or other domains where correctness is non-negotiable Own the systems that move real money, where your design decisions show up in every payment the platform makes Join a high-performing team building mission-critical fintech infrastructure, and help shape where it goes technically Work on systems where correctness genuinely matters, since a wrong tax payment is not a cosmetic bug Use modern tools, including AI and LLM tooling, to move quickly and build with leverage Grow as a technical leader in a team that values high agency and ownership, with room to shape how the Payments team works as it scales