Software Engineer Jobs in City Of London

All jobs listed below are from Home Office licensed sponsors who hold a valid UK sponsor licence and are authorized to issue a Certificate of Sponsorship (CoS) for eligible roles. While these employers can legally sponsor international workers, not every position may be eligible for visa sponsorship. Eligibility depends on the role, salary requirements, and business needs. Check our occupation eligibility & salary guide to see if your target role qualifies for a Skilled Worker visa.

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Senior Full Stack Software EngineerREED IN PARTNERSHIP LIMITED

Senior Software Developer (Full Stack) Location: Holborn, Central London (Hybrid) Reporting to: Lead Full Stack Developer Job Type: Full-time An exciting new permanent opportunity has become available for Senior Software Developer, to join a juggernaut organisation in the recruitment industry. A highly dynamic, ambitious and fast-growing team dedicated to transforming the recruitment landscape through AI-driven, human-centered technology. They're looking for a Senior Software Developer to lead t

City Of London, England, United Kingdom3/11/2026

Senior Java Software EngineerREED IN PARTNERSHIP LIMITED

Senior Java Developer Location: London (Hybrid – 3 days in office) Role Overview We are seeking a highly skilled Senior Java Developer to join the eFX Algo IT team as a Subject Matter Expert (SME) in low latency trading systems. This is a hands-on development role focused on building and enhancing pricing, hedging, and market connectivity systems for the eFX trading desk. You’ll be working in a fast-paced, front-office environment, collaborating closely with developers, business analysts, projec

City Of London, England, United Kingdom3/11/2026

Software Engineer in TestLA FOSSE ASSOCIATES LIMITED

SDET - Contract - £650 Inside IR35 - 3 days per week London - Typescript/JavaScript experience This role requires 3 days per week onsite in London and is suitable for candidates who have previously worked within a financial services. La Fosse have partnered with an established London based asset management client who are looking to bring in an experienced SDET to support a high-performing engineering team. This is a hands-on contract role focused on building and enhancing automated test framewor

City Of London, England, United Kingdom3/6/2026

Software Engineer (C++)FlexTrade UK Limited

FlexTrade Systems is a provider of customized multi-asset execution and order management trading solutions for buy- and sell-side financial institutions. Through deep client partnerships with some of the world's largest, most complex and demanding capital markets firms, we develop the flexible tools, technology and innovation that deliver our clients a competitive edge. Our globally distributed engineering teams focus on adaptable technology and open architecture to develop highly sophisticated

City Of London, England, United Kingdom3/2/2026

Full Stack Software Engineer React Typescript JavaSThree

Full Stack Software Engineer React Typescript Java Banking London This is a new and exclusive opportunity for a Full Stack Software Engineer who is primarily front office focused with React (75%) and Java (25%) to join this thriving front office derivatives team in this investment bank Role details Title: Full Stack Software Engineer Technical focus - React (75%) and Java (25%) Employer: front office banking derivatives Permanent role salary £85- £125,000 plus bonus and pension Location: London

City Of London, England, United Kingdom2/25/2026

Frontend Software EngineerPhysicsX Limited

About Us PhysicsX is a deep-tech company with roots in numerical physics and Formula One, dedicated to accelerating hardware innovation at the speed of software. We are building an AI-driven simulation software stack for engineering and manufacturing across advanced industries. By enabling high-fidelity, multi-physics simulation through AI inference across the entire engineering lifecycle, PhysicsX unlocks new levels of optimization and automation in design, manufacturing, and operations — empow

City Of London, England, United Kingdom2/25/2026

Software EngineerEmpresaria Group plc

Software Engineer (Java/Full Stack) | Contract-to-Perm | London Location: Liverpool Street, London (Hybrid – 2-3 days onsite) Rate: £550 per day (Inside IR35) Type: Contract-to-Permanent Start Date: Early to Mid-April 2026 The Opportunity We are looking for a versatile Software Engineer to join a high-impact feature team within a major Strategic Transformation Programme . This is a mission-critical initiative focused on modernising core platforms, services, and operating models for a leading Fin

City Of London, England, United Kingdom2/23/2026

Senior Software EngineerRaytheon Systems Limited

Date Posted: 2025-10-16 Country: United Kingdom Location: GBR29: Gloucester, 18b Ley Court, Barnwood Industrial Estate, Barnwood, Gloucester, Gloucestershire, GL4 3RT Position Role Type: Unspecified Raytheon UK have a full time, perm opportunity for a Senior Software Engineer to join our team on our Gloucester, Manchester or London sites. You'll be part of our experienced software dev function, working in a cross-functional team, delivering and deploying critical software across a variety of bus

City Of London, England, United Kingdom2/16/2026

Software Engineer - Simulation WorkbenchPhysicsX Limited

City Of London, England, United Kingdom2/10/2026

Lead Software Engineer Lead (Java/Python, Cloud & AI)DELOITTE LLP

Lead Software Engineer Lead (Java/Python, Cloud & AI) Location : London (5 days in office) Duration 12 months Competitive Day Rate (Inside IR35) Key Expectations from the role: Technical leadership and architecture Delivery ownership AI/ML solution stewardship People leadership Stakeholder and product partnership Controls and governance Key Skills: Expert level proficiency in Java and/or Python. Cloud-native systems on AWS (compute, storage, networking, IAM, KMS, observability). Demonstrated

City Of London, England, United Kingdom2/3/2026