Software Engineer – C# / Java

Harrington Starr; Greater London; On-site; GBP 55,000 - 65,000; Full time

Benefits offered by this job

3 days onsite in London

Competitive salary up to £80k

Strong bonus and benefits

Exposure to cross-functional fintech

Job summary

Harrington Starr is seeking a Software Engineer at associate level to join a hands-on development team in London. You\'ll build and maintain software using C# and/or Java, integrate real-time data from third-party APIs, and work within agile sprints to deliver secure, compliant solutions for trading and operations.

This role offers three days a week in the central London office, a competitive salary (£55k-£65k, with potential to £80k for the right experience), and a strong bonus and benefits

Qualifications

• Experience in financial services or trading environments.
• Proficiency in C#, and or Java OOP.
• Experience working with APIs and market data (e.g. Bloomberg, Fidessa).
• Strong communication, problem-solving, and collaboration skills.

Responsibilities

• Develop and maintain software using C#, and or Java.
• Integrate real-time and historical data from third-party APIs.
• Follow agile sprint plans and deliver reliable, secure solutions.
• Ensure systems meet regulatory and cybersecurity standards.

Job description

Software Engineer – C# / Java

Key Technologies: C# and or Java Developers needed.

London

Perm Role | 3 Days a week in the office.

£55,000 - £65,000

Harrington Starr has partnered with a well-established Financial Consultancy to find a Full Stack Developer at the Associate level. This is a hands‑on development role, supporting a range of internal systems across trading and business operations.

Key Responsibilities:

• Develop and maintain software using C#, and or Java
• Integrate real‑time and historical data from third‑party APIs
• Follow agile sprint plans and deliver reliable, secure solutions
• Ensure systems meet regulatory and cybersecurity standards

Key Benefits:

• Salary up to £80000 depending on experience
• 3 days onsite in a central London office
• Exposure to front‑to‑back‑office technology and teams
• Strong bonus and benefits package

Key Requirements:

• Experience in financial services or trading environments
• Proficiency in C#, and or Java OOP
• Experience working with APIs and market data (e.g. Bloomberg, Fidessa)
• Strong communication, problem‑solving, and collaboration skills

Other Information:

• Agile working culture in a fast‑paced environment
• No visa sponsorship – candidates must have full UK working rights
• Ideal for developers looking to grow in a cross‑functional financial tech team
• Direct communication with business and technical stakeholders

We are looking for Engineers who are client facing and interested in exploring the world of Financial Consulting – You will be working with both external and internal stakeholders. A great opportunity to join a Global Consultancy where you will work on a range of Engineering projects within the Financial Space.