[Skip to main content](#main-content) [OpenNash Jobs](https://jobs.opennash.com/) [Hiring report](/reports/hiring/) · [All StoneX Group jobs](https://jobs.opennash.com/companies/stonex-group/) · [Search jobs](/search/) StoneX Group · Birmingham, Alabama # Senior Software Engineer (C#) Birmingham, Alabama Full-time Senior individual contributor Software Engineering Listed on StoneX Group’s official careers site. Posted October 12, 2026. Check that it is still open and apply there. [Apply on StoneX Group’s careers site →](https://careers-stonex.icims.com/jobs/16430/login) [OpenNash Jobs](https://jobs.opennash.com/) / [StoneX Group](https://jobs.opennash.com/companies/stonex-group/) / Senior Software Engineer (C#) ## Job description ### Overview About the Role We are hiring a Senior Staff Software Engineer to join the API & Middleware Group, a central platform team responsible for building scalable APIs, middleware services, and event-driven systems used across the organization. This role focuses on designing and operating high-performance, low-latency services that run under significant load and strict reliability requirements. You will work on distributed, data-intensive systems that enable system-to-system integration and platform-level capabilities. This role is ideal for an experienced.NET engineer who thrives on ownership, stays up to date with the newest.NET technologies, and brings deep expertise to high-load, low-latency systems. You will collaborate closely with experienced engineers, tech leads, and QA partners, contributing to architecture, implementation, and operational excellence. ### Responsibilities Primary Duties will include - Design and develop low-latency solutions using the latest.NET technologies; build performant, scalable backend services from scratch or improve existing ones - Write well-designed, testable, and efficient code; ensure designs are in compliance with specifications Tackle live production challenges, including troubleshooting and performance issues Do proof of concepts to test out various ideas and technologies - Support continuous improvement by investigating alternatives and technologies and presenting these for architectural review - Mentor and support engineers with technical direction and best practices - Participate in code reviews (PRs), design sessions, and agile ceremonies; contribute as a strong team player - Work closely with team leads, stakeholders, and other teams across the company Continuously explore and evaluate new technologies that could enhance the platform Tech Stack You’ll Work With Languages & Frameworks: C#,.NET Core, ASP. ### NET Core Architecture Microservices, event-driven systems (Kafka, Redpanda), CQRS Cloud & Infrastructure: Azure, Kubernetes, Docker, Rancher, TeamCity, Octopus, Grafana Databases: MS SQL Server (T-SQL), NoSQL, PostgreSQL Tooling: GitHub, Visual Studio, VS Code, Rider, ReSharper AI & Developer Tools: MS Copilot, GitHub Copilot, Claude Primary Duties will include - Work closely with team leads, stakeholders, and other teams across the company Continuously explore and evaluate new technologies that could enhance the platform Qualifications ### What We’re Looking For - Minimum 5+ years’ experience building global enterprise-level systems - Knowledge of financial markets or a strong desire to learn - Proven hands-on experience designing and developing enterprise applications using C# /.NET Core /.NET 8 or higher - Solid grasp of.NET Core APIs, high-load systems, multithreading, and performance tuning Experience developing distributed systems using microservice architecture (event-based) Experience with messaging systems like Redpanda and Kafka Hands-on experience with Kubernetes and containerization (Docker); experience working on cloud platforms (Azure preferred) - Excellent knowledge of relational databases (SQL) and NoSQL databases - Strong communication skills and the ability to collaborate across teams A growth mindset and eagerness to stay current with industry trends Education BS/MS degree in Computer Science, Engineering, or a related subject ### What We Offer Work on mission-critical systems used globally Ownership, and room to grow technically and personally A strong, collaborative engineering culture with talented peers Hybrid work flexibility Support for continued technical and professional development ## At a glance - Posted by the employer: Oct 12, 2026 - First seen by OpenNash: Oct 18, 2026 - Last checked: Oct 18, 2026 - Listed for: 6 days - Location: Birmingham, Alabama - Employment type: Full-time[Apply on StoneX Group’s careers site →](https://careers-stonex.icims.com/jobs/16430/login) ## More jobs at StoneX Group ### [Principal Engineer - Software Development (.NET + AI)](https://jobs.opennash.com/companies/stonex-group/jobs/286f8339c8e38f2abd03/) Birmingham, Alabama ### [Software Engineer (C#.Net)](https://jobs.opennash.com/companies/stonex-group/jobs/af73d3e9b4ec3aa6aa2a/) Birmingham, Alabama ### [AML Transaction Monitoring Associate](https://jobs.opennash.com/companies/stonex-group/jobs/b69015652c25fe877804/) Birmingham, Alabama ### [Administrative Assistant](https://jobs.opennash.com/companies/stonex-group/jobs/7a86ee1e9a03c62a0be2/) Birmingham, Alabama ### [Associate, Special Handling - Fixed Income](https://jobs.opennash.com/companies/stonex-group/jobs/25a8dad71dcf7f7d356d/) Birmingham, Alabama ## Similar jobs at other companies ### [Software Engineer/Sr. Software Engineer](https://jobs.opennash.com/companies/microsoft/jobs/194f63de625f0dce008e/) Microsoft · United States, Washington, Redmond ### [Senior Software Engineer/Software Engineer II](https://jobs.opennash.com/companies/microsoft/jobs/533e77af5ee9c7fa5145/) Microsoft · United States, Washington, Redmond ### [Software and Data Engineer - Software Engineer III- Agentic Pricing](https://jobs.opennash.com/companies/jpmorganchase/jobs/1adbc421af4b64b8e0c5/) JPMorganChase · Jersey City, NJ, United States ### [Software Developer/Software Engineer in Test](https://jobs.opennash.com/companies/general-dynamics/jobs/229bce1af89aceaed99c/) General Dynamics · Falls Church, VA, US ### [Software Engineer II – Embedded Software](https://jobs.opennash.com/companies/bae-systems/jobs/9325424177b18e460029/) BAE Systems · Merrimack, New Hampshire, United States [Software Engineering jobs](/functions/software-engineering/) OpenNash lists jobs from employers’ own careers sites and does not handle applications. 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