Senior Software Engineer

Caspian One

Join the Equity Technology team in London as a Senior Software Engineer, focusing on modernising the Securities Lending platform.

Last checked on August 22, 2026. We may earn a commission when you click through.

This position is ideal for seasoned software engineers with finance experience seeking a contract role in a . However, the IR35 implications could deter some candidates.

✓ Involvement in significant tech modernisation projects ✓ Hybrid working options ✓ Opportunity to work with finance sector leaders

Senior Software Engineer

Caspian One

Updated 5 days ago

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London Hybrid Contract

This position is ideal for seasoned software engineers with finance experience seeking a contract role in a . However, the IR35 implications could deter some candidates.

About this role

Join the Equity Technology team in London as a Senior Software Engineer, focusing on modernising the Securities Lending platform.

About the Company

Caspian One is a recruitment agency specialising in technology talent, providing innovative solutions for clients in the finance sector.

Key Highlights

✓ Contract position with a hybrid work model
✓ Focus on modernisation initiatives in Securities Lending
✓ Opportunity to work within an established team
✓ Experience in a fast-paced financial environment

💡 Honest Take: While the role sounds appealing, the inside IR35 contract means you might face higher tax deductions than anticipated. the hybrid model could lead to unpredictable work hours.

Pros

✓ Involvement in significant tech modernisation projects
✓ Hybrid working options
✓ Opportunity to work with finance sector leaders

Cons

✗ IR35 contract may lead to higher taxes
✗ Potentially unpredictable work hours due to hybrid model
✗ No salary information disclosed

Best For: Professionals with a background in software engineering and finance who thrive in hybrid work settings.

Watch Out: Be prepared for the financial implications of an inside IR35 contract, which could affect your take-home pay significantly.

Apply for this position →

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Expert Review

At Caspian One, the Senior Software Engineer role offers contribute to crucial modernisation projects within the finance sector. The hybrid work model allows for flexibility, but applicants should be cautious about the tax implications of the inside IR35 contract, which could significantly reduce net earnings. The Securities Lending platform is a vital component of the client's operations, and candidates will be expected to bring substantial experience to the table.

Real-world challenges may include navigating complex legacy systems and adapting to evolving business needs, which can be both rewarding and demanding. Customer service reputation at Caspian One tends to be positive, but as with many recruitment agencies, communication can vary based on specific recruiter relationships. Overall, those who thrive under pressure and enjoy fast-paced environments will likely find this role fulfilling.

For further details, visit the official listing at Caspian One.