103 senior developer jobs found in London

We are currently looking for a Senior Power BI consultant/developer to build, lead, and own a new reporting capability within the Operations/IT function. This is a high-autonomy, hands-on role that combines BI development, operational analysis, system support, and technical problem-solving Senior Power BI Consultant/Developer- Banking Operations (Reconciliations / Controls) £600- £650pd London - (Hybrid) x2 Days on-site emagine is a high-end professional services consultancy and solutions firm specializing in providing business and technology services to the financial services sector. We power progress, solve challenges, and deliver real results through tailored high-end consulting services and solutions. We have created a culture of openness and integrity by building genuine and strong relationships and partnerships, enabling us to be uncompromising in our dedication to delivering the optimal service for our clients. Our commitment is not just towards...

We are currently looking for a Senior Power BI consultant/developer to build, lead, and own a new reporting capability within the Operations/IT function. This is a high-autonomy, hands-on role that combines BI development, operational analysis, system support, and technical problem-solving Senior Power BI Consultant/Developer- Banking Operations (Reconciliations / Controls) £600- £650pd London - (Hybrid) x2 Days on-site emagine is a high-end professional services consultancy and solutions firm specializing in providing business and technology services to the financial services sector. We power progress, solve challenges, and deliver real results through tailored high-end consulting services and solutions. We have created a culture of openness and integrity by building genuine and strong relationships and partnerships, enabling us to be uncompromising in our dedication to delivering the optimal service for our clients. Our commitment is not just towards...

Senior Java Developer - London (Contract Outside IR35) WE ARE: At Adaptive, we are a financial consulting firm that partners with capital, commodity, and digital market participants. We value differentiation through technology. Our experienced teams design and deliver complex front-office technology solutions using our proven accelerators to create long-term competitive advantage. Our clients include the world's leading investment banks, investment managers, fintech and capital market service providers. With a global reach with offices in London, New York, Barcelona, Manila and Montreal, we have a proven track record of delivering powerful, elegant and intuitive trading technology solutions. We are now looking for Java Developer services on an exciting project! THE SERVICES REQUIRED: A JVM lover who really enjoys working with the latest technologies and design patterns Eager to solve complex technical challenges, especially in cloud-based environments...

ROLE: Senior Full Stack Developer - Contract OFFICE: London   We are Two Circles. We are a Sports & Entertainment Marketing business. We grow audiences and revenues. We do that by knowing fans best. We work with clients to help them understand & influence what their fans are doing – the way fans spend their money, the events that fans attend, the channels fans respond to, the content fans watch and more. And we use the understanding this gives us to help our clients grow. Grow their audiences and grow their revenues - both direct to consumer and business to business revenues. Our platforms and services are trusted by over 900 clients globally, including the English Premier League, Red Bull, UEFA, VISA, the NFL, Nike and Amazon. We are almost 1000 people, based out of 14 offices, and we deliver work for sports and entertainment businesses of all shapes and sizes all over the world   JOB DESCRIPTION As part of our ongoing growth,...

Imparta is a global leader in performance improvement for Sales, CX and Leadership. Imparta’s 25 years of research and experience with leading global organisations allows it to deliver: The skills to win: Imparta’s modern, research-based methodology equips sellers to make sense of each situation, choose the right response, and deliver results based on 180+ best practice skill modules. Embedded at scale: Imparta’s expert designers, consultants and trainers help you assess, develop, coach, and continuously improve sales capabilities at scale, globally, in local language. Powered by agentic AI: i-Coach® AI is an agentic solution that delivers proactive and personalised assessment, learning, coaching and task support for every user, integrated into your AI infrastructure. Together, these elements allow organisations to assess, develop, coach, practice, and continuously improve sales capabilities at global scale, while tracking results and adjusting...

Waracle is a world-class digital technology consultancy and home to a diverse, smart, curious and ambitious community of specialists in technology-driven transformation.   We work with ambitious clients to help them solve their biggest business and customer challenges. We help our clients to innovate and create intelligent digital products and services. We thrive on complex challenges and deliver business-critical IT transformation projects, moving seamlessly from strategy, design and delivery to operations. Waracle are looking for a Senior Backend Java Developer with hands on experience in AI implementation to join our growing team. This role is available on a permanent or contract (Outside IR35) basis and will be based hybrid from our London office.   As a Senior Backend Developer, you will be a key technical leader, responsible for the end-to-end design, delivery, and optimisation of our clients' most critical backend systems. This role requires not...

Job Title: Junior Full Stack Java Web Developer (Hybrid Contractor) About ReachX ReachX is at the forefront of the digitalization of financial services and is a leader in the future of work. ReachX services are specifically designed for Institutional Investors, Corporates, and Professional Services Firms. Our tech platform will enable you to access more than 4000 vetted Advisors and connect with more than 500 Institutional Investors active in private markets. Our mission is to make financial services more efficient and generate unique growth opportunities for our Clients, Partners, and Advisors. Examples of our Institutional Investors include Private Equity, VC, and Family offices predominantly based across the UK and Europe, and projects are typically paid on a day rate or through a success or transaction fee. Interim M&A Advisors might also have a background as: Corporate Finance Advisors CFOs and Finance Directors Investment Banking...

Job Title: Junior Full Stack Java Web Developer (Hybrid Contractor) About ReachX ReachX is at the forefront of the digitalization of financial services and is a leader in the future of work. ReachX services are specifically designed for Institutional Investors, Corporates, and Professional Services Firms. Our tech platform will enable you to access more than 4000 vetted Advisors and connect with more than 500 Institutional Investors active in private markets. Our mission is to make financial services more efficient and generate unique growth opportunities for our Clients, Partners, and Advisors. Examples of our Institutional Investors include Private Equity, VC, and Family offices predominantly based across the UK and Europe, and projects are typically paid on a day rate or through a success or transaction fee. Interim M&A Advisors might also have a background as: Corporate Finance Advisors CFOs and Finance Directors Investment Banking...

Job Title: Junior Full Stack Java Web Developer (Hybrid Contractor) About ReachX ReachX is at the forefront of the digitalization of financial services and is a leader in the future of work. ReachX services are specifically designed for Institutional Investors, Corporates, and Professional Services Firms. Our tech platform will enable you to access more than 4000 vetted Advisors and connect with more than 500 Institutional Investors active in private markets. Our mission is to make financial services more efficient and generate unique growth opportunities for our Clients, Partners, and Advisors. Examples of our Institutional Investors include Private Equity, VC, and Family offices predominantly based across the UK and Europe, and projects are typically paid on a day rate or through a success or transaction fee. Interim M&A Advisors might also have a background as: Corporate Finance Advisors CFOs and Finance Directors Investment Banking...

Role: Sr OIC Developer Location: London, UK ( Needed locals) Contract: Long-term Contract   Skills: • OIC VBCS platform expertise • Java – Expert level • JavaScript – Expert Level • TRADACOM, EDIFACT, X12 – Expert • Experience with EDI Integrations on OIC is an Essential skill • Experience with SFTP and AS2 based EDI   OIC Engineer • Analyse systems integrations and creates systems and software architecture that keep enterprise data secure and compliant. • Uses standards and best practices to create architectural designs and diagrams • Interfaces with clients and business partners to understand the overall needs • Create Integration processes using OIC technologies • Build reusable code. Build efficiently upon the existing data model and quickly change gears as priorities change • Maintain high service levels for clients, always...

WE ARE: At Adaptive, we are a financial consulting firm that partners with capital, commodity, and digital market participants. We value differentiation through technology. Our experienced teams design and deliver complex front-office technology solutions using our proven accelerators to create long-term competitive advantage. Our clients include the world's leading investment banks, investment managers, fintech and capital market service providers. With a global reach with offices in London, New York, Barcelona, Manila and Montreal, we have a proven track record of delivering powerful, elegant and intuitive trading technology solutions. We are now looking for Java Developer services on an exciting project! THE SERVICES REQUIRED: A JVM lover who really enjoys working with the latest technologies and design patterns Eager to solve complex technical challenges, especially in cloud-based environments and event driven architecture patterns Experienced...

Role: Sr OIC Developer Location: London, UK ( Needed locals) Contract: Long-term Contract   Skills: • OIC VBCS platform expertise • Java – Expert level • JavaScript – Expert Level • TRADACOM, EDIFACT, X12 – Expert • Experience with EDI Integrations on OIC is an Essential skill • Experience with SFTP and AS2 based EDI   OIC Engineer • Analyse systems integrations and creates systems and software architecture that keep enterprise data secure and compliant. • Uses standards and best practices to create architectural designs and diagrams • Interfaces with clients and business partners to understand the overall needs • Create Integration processes using OIC technologies • Build reusable code. Build efficiently upon the existing data model and quickly change gears as priorities change • Maintain high service levels for clients, always...

WE ARE: At Adaptive, we are a financial consulting firm that partners with capital, commodity, and digital market participants. We value differentiation through technology. Our experienced teams design and deliver complex front-office technology solutions using our proven accelerators to create long-term competitive advantage. Our clients include the world's leading investment banks, investment managers, fintech and capital market service providers. With a global reach with offices in London, New York, Barcelona, Manila and Montreal, we have a proven track record of delivering powerful, elegant and intuitive trading technology solutions. We are now looking for Java Developer services on an exciting project! THE SERVICES REQUIRED: A JVM lover who really enjoys working with the latest technologies and design patterns Eager to solve complex technical challenges, especially in cloud-based environments and event driven architecture patterns Experienced...

GreySpark Partners is a specialist consultancy that helps capital markets firms transform how they operate, compete and innovate. We combine deep industry expertise with hands-on delivery to solve complex business, technology and regulatory challenges for investment banks, asset and wealth managers, fintechs and other financial institutions, with a strong focus on front-office trading technology and solutions. GreySpark is expanding its Technology talent pool and is seeking experienced Software Developers interested in working on complex, business-critical trading platforms within global investment banks and financial markets clients. This is an opportunity to contribute to the design and optimisation of real-time systems across pricing, risk, connectivity and execution workflows. What You'll Do As a GreySpark technology consultant, you will work closely with front-office and technology teams to deliver both review and delivery projects. Responsibilities include: •...

GreySpark Partners is a specialist consultancy that helps capital markets firms transform how they operate, compete and innovate. We combine deep industry expertise with hands-on delivery to solve complex business, technology and regulatory challenges for investment banks, asset and wealth managers, fintechs and other financial institutions, with a strong focus on front-office trading technology and solutions. GreySpark is expanding its Technology talent pool and is seeking experienced Software Developers interested in working on complex, business-critical trading platforms within global investment banks and financial markets clients. This is an opportunity to contribute to the design and optimisation of real-time systems across pricing, risk, connectivity and execution workflows. What You'll Do As a GreySpark technology consultant, you will work closely with front-office and technology teams to deliver both review and delivery projects. Responsibilities include: •...

GreySpark Partners is a specialist consultancy that helps capital markets firms transform how they operate, compete and innovate. We combine deep industry expertise with hands-on delivery to solve complex business, technology and regulatory challenges for investment banks, asset and wealth managers, fintechs and other financial institutions, with a strong focus on front-office trading technology and solutions. GreySpark is expanding its Technology talent pool and is seeking experienced Software Developers interested in working on complex, business-critical trading platforms within global investment banks and financial markets clients. This is an opportunity to contribute to the design and optimisation of real-time systems across pricing, risk, connectivity and execution workflows. What You'll Do As a GreySpark technology consultant, you will work closely with front-office and technology teams to deliver both review and delivery projects. Responsibilities include: •...

Role Overview We are looking for a Senior Delphi Developer with deep expertise in Delphi 10.4 or later , strong understanding of software development life cycle (SDLC) , and hands-on experience in Oracle PL/SQL and RDBMS . The ideal candidate will be responsible for designing, developing, and maintaining enterprise-grade business applications, while also contributing to build automation and deployment processes using tools such as TeamCity and Octopus . This role requires excellent debugging skills, experience in developing custom controls, and collaboration with cross-functional teams to deliver robust and scalable software solutions. Experience: 10–14 years Key Responsibilities Design, develop, and maintain business applications using Delphi 10.4 or newer versions . Participate in the full Software Development Life Cycle (SDLC) — from requirements gathering to deployment and support. Configure and maintain automated build and deployment pipelines using...

Contract Principal Full Stack role (Node, React, Azure) - initially 6 months. Who We Are: AND Digital are a tech company focused on accelerating digital delivery and dedicated to closing the digital skills gap. We’ve been helping organisations build better digital products and stronger digital teams since 2014. We believe our work should always make a remarkable impact for our clients. We do this through our regional offices (or ‘Clubs’) building strong relationships with our partners, so that they are always prioritised by a team within close proximity. This unique model has driven success for our clients and ourselves, evidenced by our remarkable organic growth since 2014. Today we number more than 1,300 people with Clubs all over the UK, Europe and the USA with plans for global expansion in the next couple of years. Join us - and help us fulfil our mission to close the world’s digital skills gap. The Tech Principal will use their expert tech...

Job Introduction Main Responsibilities As a Java Developer (6M day rate contract) you will be joining the IT team responsible for the delivery, support and maintenance of Handelsbanken PLC’s Core Banking systems encompassing Platforming, Risk, Payments, Lending and Customer Data. As a Java Developer you will be providing expertise in the full software development life cycle. Key Responsibilities Use your initiative to work with Senior Java Development, UI/UX Development and Agile Transformation to help shape, architect and deliver greenfield/brownfield/integration applications employing best design and development practice Positively effective at systems analysis, solving technical problems and development excellence given the constraints of the Bank’s environment Follow cross-functional development best practice, including but not restricted to, Functional and Non-Functional Analysis, Application Architecture, Design, Coding and Unit Testing,...

Staff Software Engineer – Robotics & Life Sciences Automation Location: London, UK - Hybrid (3 days/week on site) Contract: 4 months with possibility of extension Start: ASAP (Dec 2025 / Jan 2026) Automata: accelerating breakthroughs that save lives Automata builds automation that accelerates life sciences: enabling faster drug discovery, next-generation personalised medicines, and high-precision diagnostics where turnaround time can mean the difference between life and death. We believe the future of biology depends on automation that is reliable, scalable and accessible — and we’re building the platform that makes that possible. Our modular lab bench and digital automation platform already run mission-critical workflows in leading research organisations. The next evolution of our product will scale globally, unify robotics with reproducible software interfaces, and redefine how scientists interact with instruments. And we’re building...