Backend Software Engineer Java - FinTech

Client Server; Newcastle upon Tyne; On-site; GBP 108,000 - 132,000; Full time

Benefits offered by this job

Salary to £120k + Bonus

25 days holiday

Social team atmosphere

Job summary

Client Server in Newcastle is seeking a Backend Software Engineer to drive Java-based development within finance/trading environments.

You will transform a legacy C++ trading system into a modern Java platform, collaborating with Front Office teams and other engineers to deliver real-time, low-latency systems.

The role is full-time onsite in Central Newcastle with a competitive package and opportunities to shape high-profile trading infrastructure.

Qualifications

• Minimum 2.1 BSc in Computer Science or related, from a top-tier/Russell Group university with strong A-levels.
• Solid backend Java development experience, including multithreading.
• Experience with trading systems and knowledge of financial markets.
• Understanding of real-time systems and latency considerations.
• Familiarity with C++ would be beneficial.

Responsibilities

• Transform a legacy C++ trading system into a modern Java-based platform.
• Collaborate with Front Office trading teams and other engineers to deliver robust, real-time systems.
• Contribute to secure, scalable, low-latency trading infrastructure.

Skills

Java backend

Multithreaded Java

Trading systems knowledge

Low-latency design

Education

2.1 BSc in Computer Science or related

Tools

Claude AI

Job description

Backend Software Engineer / Developer (Java) Newcastle onsite to £120k

Do you have expertise with backend Java development within finance / trading environments?

You could be progressing your career in a senior, hands-on Java Developer role at a scaling FinTech.

As a Backend Software Engineer you'll play a key role in a new client engagement to transform a highly complex C++ legacy trading system into a modern Java based application. You'll collaborate with Front Office trading teams as well as other highly skilled software engineers and product teams to deliver robust, secure, real-time trading systems using Java and Claude.

Location:

You'll join the team in Central Newcastle offices on a fulltime basis (Monday to Friday).

About you:

• You have strong backend, multithreaded Java development experience
• You have a strong knowledge of financial markets and have previous experience of working on trading systems
• You have a good understanding of real-time system development and latency
• You're comfortable using AI tools such as Claude
• You're collaborative and pragmatic with client facing communication skills
• You're naturally curious and have advanced critical thinking and problem solving skills
• An understanding of C++ would be of benefit but it's not essential
• You have achieved a minimum 2.1 BSc in Computer Science or similar technical discipline from a top tier / Russel Group university, backed by A's at A-level

What's in it for you?

Alongside a highly competitive package, you'll gain the opportunity to work on technically demanding systems, collaborate with exceptional engineers, and play a meaningful role in the growth of a business that is still small enough for your contributions to have a visible impact.

• Salary to £120k + Bonus
• 25 days holiday
• Social team atmosphere with a range of events