Backend Software Engineer .Net Java Low Latency

Salary: £90,000 - 90,000 per year

Requirements:

• Strong C# .Net skills
• Good understanding of design patterns such as SOLID, DRY and KISS
• Experience building systems that require high throughput, low latency and scalability
• Strong experience building APIs
• SQL experience
• Good understanding of CI/CD and Infrastructure as Code, including Terraform
• Cloud experience with AWS
• Familiarity with other languages such as Java and openness to learn new things
• Comfortable using agentic AI and tools to improve productivity
• Collaborative with great communication skills and willingness to mentor more junior developers

Responsibilities:

• Collaborate with DevOps and Product Management within an Agile team environment
• Work on a Greenfield Market Data platform built with C# and deployed to AWS
• Contribute to a highly scalable, low-latency platform handling large-scale message volumes
• Work across the full development lifecycle, from requirements and design through to production
• Provide subject matter expertise on the .Net stack
• Contribute to technical design discussions
• Use Apache Flink with Java for large-scale data processing
• Assess and recommend new and emerging technologies, using the best tool for the job

Technologies:

• Agentic AI
• AI
• AWS
• Backend
• C#
• CI/CD
• Cloud
• DevOps
• Flink
• Java
• SQL
• Terraform
• ASP.NET

More:

We are a global financial Market Data provider offering a Backend Software Engineer / Developer opportunity in London. Our platform is built with C# and deployed to AWS, and we focus on high scalability and low latency. We offer a competitive salary of up to £90k, bonus, 25 days holiday, pension, life assurance and income protection, private medical and dental care, a gym subsidy and wellness apps, a cycle to work scheme, the ability to buy stock options, family leave and sabbaticals, and continuous training and career development including a personalised budget. Our team works from our City office four days a week, with flexibility to work from home once a week.

last updated 34 week of 2026