> Markdown version of [/jobs/ext/3974863-senior-software-engineer-payments](https://www.wearedevelopers.com/jobs/ext/3974863-senior-software-engineer-payments). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Senior Software Engineer, Payments

- **Company:** RE MOTION WELLNESS
- **Location:** Mundelein, IL, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** JavaScript (Programming Language), .NET Framework, Software Design Documents, Payment Systems, TypeScript, Large Language Models
- **Published:** October 27, 2026
- **Apply:** https://www.thejobnetwork.com/job/949914cc-6839-40ff-a8bb-448c803cb275/senior-software-engineer-payments

## About the Role

* 8+ years of experience as a software engineer, with a track record of designing and operating production systems at scale
\n

 * 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
\n

 * Deep, hands-on proficiency building production applications with C# and .NET, plus modern JavaScript or TypeScript
\n

 * Strong experience using LLMs and AI tooling to ship features and accelerate development
\n

 * Demonstrated ownership of non-trivial systems from architecture through production, including the operational consequences
\n

 * Strong systems-oriented judgement across performance, scalability, security, correctness, and reliability
\n

 * A track record of technical leadership without formal authority: aligning teams, mentoring engineers, and acting as a force multiplier
\n

 * High agency, meaning you find work that needs doing, take ownership, and move things forward without being told
\n

 * Excellent communicator, able to write a clear design document and explain trade-offs to engineers, executives, and non-technical audiences alike

## Description

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., You will work across the stack, from data models and services through to the surfaces our customers and internal teams use. We are looking for someone who has built money-movement systems before and knows the difference between a payment flow that works on the happy path and one that stays correct, traceable, and recoverable when the real world intervenes.