Senior Software Engineer

Here at TreQ, we are accelerating the path to useful quantum computing by designing, deploying, and operating open-architecture quantum computing infrastructure that evolves as quantum technologies advance. We are shaping the future of quantum computing and as we expand, we are searching for a Senior Software Engineer to join our team. Your primary responsibility as a Senior Software Engineer will be building a quantum orchestrator that interfaces directly with external quantum hardware and software, including transpilers.

You will work closely with TreQ's systems engineers, software lead, and supply chain partners to pioneer open-architecture quantum infrastructure.

• Architect sub-components within the TreQ quantum orchestrator from high level flow down to required data structures
• Manage AI agents to build, document, and maintain quantum orchestration and integration solutions (primarily .NET background worker services) that interface directly with external quantum hardware
• Automate and document software deployments on clean Ubuntu environments using Docker and systemd
• Establish, document, maintain, and streamline CI workflows to ensure high software quality
• Actively participate in peer code reviews
• Self-manage sprint tasks within a fast-moving, collaborative team

• Algorithm design
• Selection of appropriate data structures
• The architecture of .NET background worker services and message queues
• Docker container deployments
• SignalR or Blazor

• Demonstrate good knowledge of software system architecture
• Demonstrate high proficiency in .NET and C#, with familiarity in Python
• Demonstrate the ability to specify, design, and document bi-directional APIs cleanly
• Independently problem-solve

• Developing software that interacts directly with external hardware or instruments
• Using AI tools to assist in generating unit tests, documentation, and routine code

• Security-first thinking and standard software patterns and practices
• Functional programming patterns (e.g., LINQ, immutable records)
• Thriving in a small, supportive, nimble team, where knowledge sharing and team growth are prioritized, working on deep tech challenges
• Letting AI handle repetitive/routine tasks so you can focus on core logic
• Writing TCP/IP stacks, compiler passes, or authentication solutions

There is extra kudos if you have a degree in computer science, software engineering, physics, or can share equivalent practical experience. You don't need to have a background in quantum to apply. We value practical engineering experience as much as formal academic credentials. People join TreQ from industry, national laboratories, startups, academia, and military service. TreQ is a veteran-owned, woman-owned small business and an equal opportunity employer.

We hire based on capability, character, and the ability to contribute to our mission.

TreQ is a hands-on engineering organisation tackling complex systems at the frontier of computing. This work requires close collaboration, trust, and rapid iteration, so most roles work primarily in person where our teams design, build, and operate systems together. Some hybrid flexibility may be available, though candidates should expect to spend the majority of their time on-site with teammates.

Some roles at TreQ involve access to technologies subject to export control laws in the United States, the United Kingdom, and other jurisdictions (including ITAR and EAR). Candidates for these roles must be eligible to access export-controlled technology without TreQ obtaining an export license. In accordance with applicable law, TreQ…