Develop and support a high-throughput, low-latency energy trading platform. Responsibilities include improving exchange and broker connectivity, building SDK and API features, enhancing observability, implementing automated trading capabilities, benchmarking for performance, designing complex features, contributing to RFCs, and mentoring junior engineers. The role requires expertise in C#, Rust, concurrency, distributed systems, and software reliability.
We’re looking for skilled SRE engineers who will focus on improving the reliability and scalability of Joule Direct, a widely used energy trading platform. You will work across our cross-functional teams of software engineers, quality engineers and devops engineers to help drive systemic improvements to the reliability of our systems.
Ideally you have many years of experience building and supporting large-scale software systems and you feel comfortable talking to infrastructure engineers about networking issues or kernel tuning as well as reporting .NET garbage collector bugs to Microsoft!
Ideally you have many years of experience building and supporting large-scale software systems and you feel comfortable talking to infrastructure engineers about networking issues or kernel tuning as well as reporting .NET garbage collector bugs to Microsoft!
The Role
We’re looking for Senior Software Engineers to join our Joule Direct team, to help us build and improve our high-throughput, low-latency energy trading platform. You’ll be working with some amazing technologists to solve complex problems.
For us, teamwork is everything. We listen to each other, we adapt, we evolve and we strive to innovate. We are making significant investments in our business and we will invest in you.
Some of the work on any given day includes:
- Improve how we connect to an Exchange or Broker (eg. CME, ICE, EEX, etc)
- Implement customer facing features via SDKs and APIs
- Improve observability in hot paths
- Implement a new Automated Trading feature
- Benchmarking code to reduce latency and improve throughput
- Mentoring and coaching junior engineers
- Design, plan and execute complex features and raise RFC’s
Our Tech Stack
- We use GitHub Copilot for agentic development
- Our services are written in modern C# and Rust
- We use a fair bit of SQL databases, Kafka, and RabbitMQ
- We run some services on dedicated hardware and on AWS
- We use Azure DevOps for build/deploy pipelines and story management
- Our observability stack is Splunk, Grafana, Pyroscope and Prometheus
You
For this position, you will likely be a very successful team member if:
- You like working in a cross-functional team with Product Managers, Testers and DevOps engineers
- You aim to deliver high quality work but can be pragmatic on tradeoffs in the interest of speed
- You have have a self-improvement mindset and seek feedback from your peers
- You get involved in all stages of development including planning, implementation and delivery
- You pair and mentor other engineers and expand your knowledge
- You lead and contribute to technical discussions
Skills & Experience
- Knowledge or experience with financial markets will be highly valued
- Excellent communication skills
- Strong knowledge of C#, Rust or any popular programming language
- Can write efficient, concurrent code
- Knowledge of how distributed systems work
- Knowledge of version control systems
If you are not an expert in these specific technologies but are familiar with an equivalent then we’re happy to train you.
The Team
- Personal development driven by employees
- Interesting and complex problems to solve
- Continuously improve the way we use AI to increase productivity
- Work with amazing technologists who are lifelong learners
- Learn about other parts of the business through our commitment to collaboration
- Opportunities to learn through regular tech talks, training and Hackathons
- Join a company with strong market presence
Trayport is committed to creating and sustaining a collegial work environment in which all individuals are treated with dignity and respect and one which reflects the diversity of the community in which we operate. We provide accommodations for applicants and employees who require it.
Trayport London, England Office
7th Floor, 9 Appold Street, London, United Kingdom, EC2A 2AP
Similar Jobs
Fintech • Mobile • Payments • Software • Financial Services
Own technical roadmaps and deliver scalable backend systems for Wise’s global KYC and onboarding platform. Design microservices, APIs, integrations with risk and compliance systems, and solutions addressing reliability, security, scalability, and technical debt. Lead complex cross-team projects, make data-driven decisions, mentor engineers, and improve customer verification experiences while supporting regulatory compliance.
Top Skills:
KafkaMicroservicesNon-Relational DatabasesRabbitMQRelational Databases
Fintech • Mobile • Payments • Software • Financial Services
Build backend and data governance systems for Wise’s Risk Assessment platform. Responsibilities include data quality monitoring, lineage tracking, continuous control assurance, drift detection, audit trails, explainability tooling, and regulatory evidence generation. The role requires designing scalable, high-throughput distributed systems and integrating governance capabilities with the Risk API while collaborating with Product and Financial Crime teams.
Top Skills:
Data Lineage TrackingData Quality FrameworksKafkaNosql DatabasesPipeline OrchestrationSQL
Cloud • Information Technology • Security • Software • Cybersecurity
Architect and build resilient, high-throughput services for agentic web discovery, content transformation, indexing, tool calling, and generative interfaces. Define emerging agent protocols and technical standards, write architectural specifications, shape product roadmaps, improve observability and reliability, lead incident response, and mentor engineers. Partner with product teams, customers, and stakeholders while driving technical governance, hiring, and engineering process improvements across Cloudflare.
Top Skills:
APIsCachingCloudflare WorkersCryptographic ProtocolsData PipelinesDigital SignaturesDistributed SystemsGenerative UiHTTPJavaScriptMcp AppsModel Context Protocol (Mcp)MppProxiesPublic-Key EncryptionRagRustTypescriptUcpWeb CrawlingWebmcp
What you need to know about the London Tech Scene
London isn't just a hub for established businesses; it's also a nursery for innovation. Boasting one of the most recognized fintech ecosystems in Europe, attracting billions in investments each year, London's success has made it a go-to destination for startups looking to make their mark. Top U.K. companies like Hoptin, Moneybox and Marshmallow have already made the city their base — yet fintech is just the beginning. From healthtech to renewable energy to cybersecurity and beyond, the city's startups are breaking new ground across a range of industries.
