Software Engineer

Fionics

Join Fionics as a Software Engineer, developing trading systems and optimising performance-critical financial applications.

Last checked on June 11, 2026. We may earn a commission when you click through.

Fionics presents an exciting chance for software engineers to the world of high-frequency trading.

✓ Engaging work in quantitative finance ✓ Opportunity to work on cutting-edge technologies ✓ Flexible entry requirements for candidates

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Software Engineer

Fionics

Updated 2 months ago

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London

Fionics presents an exciting chance for software engineers to the world of high-frequency trading.

About this role

Join Fionics as a Software Engineer, developing trading systems and optimising performance-critical financial applications.

About the Company

Fionics is a leading firm in quantitative finance, focusing on advanced trading technologies and market data infrastructure.

Key Highlights

✓ Build trading systems and market data infrastructure
✓ Develop quantitative research platforms and tools
✓ Optimise performance-critical financial applications
✓ Trading experience preferred but not essential

💡 Honest Take: This role offers a unique opportunity for engineers keen on finance, though prior trading experience could be beneficial.

Pros

✓ Engaging work in quantitative finance
✓ Opportunity to work on cutting-edge technologies
✓ Flexible entry requirements for candidates

Cons

✗ Requires strong analytical and programming skills
✗ May not suit those without a finance background
✗ Non-remote position limits flexibility

Best For: It's suitable for software engineers looking to pivot into finance, especially those with a keen interest in trading.

Watch Out: Be prepared for a fast-paced environment that demands quick learning and adaptability.

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What Customers Say

Feedback from employees highlights a challenging yet rewarding work environment, with ample opportunities for learning.

Expert Review

Fionics is seeking software engineers who are eager to make an impact in quantitative finance. The role focuses on building trading systems and optimising data infrastructure, which is crucial in today's high-frequency trading landscape. Candidates without prior trading experience are still encouraged to apply, making this role accessible to a broader range of engineers.

The company emphasises the development of performance-critical applications, which can be both challenging and rewarding for those with a passion for technology. If you thrive in dynamic environments and enjoy solving complex problems, this could be a perfect fit. However, that the role demands strong analytical skills and programming expertise, which might deter less experienced applicants.

Fionics' commitment to innovation in trading technology positions it well in the finance sector. As the demand for efficient trading solutions grows, engineers in this role will have the opportunity to contribute to advancements. For those interested in a career shift into finance, this position offers significant growth potential.

Interested candidates can find more details on Fionics' listing here.