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Onsite senior backend developer Greater London
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Rullion Managed Services
22 Sep, 2026
Contract
Senior Backend Developer
Rullion Managed Services London, UK
Location: London, EC1M 6PB Contract: 6 Month Contract Hours: Full-time, 37 hours per week Hybrid: 1 day per week onsite in London Rate: TBC Join a dynamic energy provider dedicated to delivering sustainable solutions across the UK. We are looking for an enthusiastic and resourceful Senior Backend Developer who is passionate about building exceptional products and developing robust, scalable solutions. This is an initial 6-month contract, with potential for extension. The role is full-time, 37 hours per week, with one day per week onsite in London. Accountabilities Play a pivotal role within the backend engineering team, helping to build cloud-based applications. Develop backend solutions using Python and AWS Cloud services. Adopt a serverless-first approach to application design. Collaborate within an Agile team alongside other backend engineers and product designers. Strategise, develop, test and deploy new features and experiments. Participate in...
Rullion Managed Services
08 Oct, 2026
Contract
Senior Frontend developer
£650 - £700 daily
Rullion Managed Services London, UK
Senior Frontend Developer (Contract) Overview We are looking for a talented Senior Frontend Developer to join a high-performing engineering team working on business-critical customer and colleague applications. This is an opportunity to contribute to modern web applications, deliver impactful features, and help drive the evolution of frontend platforms in a collaborative and fast-paced environment. You'll work closely with designers, backend engineers, product teams, and platform specialists to build scalable, maintainable, and high-quality solutions using modern frontend technologies. Contract Details Role: Senior Frontend Developer Contract Type: Inside IR35 Start Date: ASAP (flexible for the right candidate) Duration: Until the end of 2026 with potential extension Rate: Up to 650 per day Working Pattern: Hybrid - 1 day per week on-site in London (Thursdays) Hours: 40 hours per week The Role You will primarily work on an established telephony...
AND Digital
19 Sep, 2026
Senior C++ Developer (Contract)
AND Digital London, UK
Contract Senior C++ Developer Location: London, 2 to 3 days onsite in Kings Cross Contract: Immediate start - 12 week contract Who We Are AND Digital are on a mission to close the world's tech skills gap. We help organisations navigate the future of technology by combining human expertise, emerging tech and AI to deliver better outcomes, faster. Since 2014, we've worked alongside clients to solve complex challenges, build high-performing teams and create lasting capability. Today, we're over 1,300 people across the UK, Europe and the USA, with ambitious plans for continued growth. The Role We're looking for four Embedded C++ Developers to join an in-house backend engineering team working on a highly regulated, safety-critical medical technology product. You'll own a self-contained area of the application, taking work from initial design through to merged, tested and documented code. Depending on your experience and the team's needs, this could include areas such as alarms,...
Duchenne UK
08 Oct, 2026
Permanent
Director of Income Generation
Duchenne UK London, UK
Duchenne UK works tirelessly to challenge barriers, deliver practical solutions, and speed up progress for families affected by Duchenne muscular dystrophy (DMD). The charity collaborates with leading researchers, clinicians, industry and charity partners to deliver hope and measurable progress for people living with DMD in the UK. Founded in 2012 by two mothers whose sons were diagnosed with DMD, the charity has raised more than £34 million and supported 81 clinical trials. Today, all ambulant young people with Duchenne can access a drug through the NHS. Following a comprehensive review of its fundraising, Duchenne UK is taking a new, audience-led approach, backed by its board. It starts with the motivations and needs of supporters, donors, families and partners, and moves the charity to a multi-year relationship model built on stewardship, segmentation and supporter journeys, without losing the authenticity and close community connections that have made it so successful....
FG
08 Oct, 2026
Permanent
Application Support Consultant
FDM Group London, UK
About The Role FDM is a global business and technology consultancy seeking an Application Support (Equity Derivatives) to work for our client within the Financial Services sector. This is initially a 12 month contract with the potential to extend and will be a Fully Office based role that will be based in London. Our client is looking for smart, proactive individuals who can demonstrate strong communication skills and a practical, problem-solving mindset. This is a hands on application support role within the Equity Derivatives business, offering exposure to trading systems and critical institutional workflows. Responsibilities: Provide functional and technical support for applications used by the Equity Derivatives business Monitor and maintain the health of critical systems, performing regular checks and proactive issue identification Manage and respond to production incidents, including escalation, root cause analysis, and resolution Handle change...
IC
08 Oct, 2026
Permanent
Senior Treaty Broker
IDEX Consulting Ltd London, UK
Built something good somewhere else? Come and own it here. Most Brokers who build real value end up watching someone else capitalise on it. This business was built to do the opposite. We're working on behalf of a large, expanding, entrepreneurial reinsurance Broker with genuine global reach, currently backing a period of serious growth with serious capital. The team is already there. The infrastructure is already there. What they're missing is the next entrepreneurial producer - someone who wants to build and grow their own treaty portfolio and who wants a financial reward system that actually reflects what they bring in, rather than what a committee decides to hand back at year end. This group has a track record of turning performance into significant, tangible reward for the people who deliver it. Not vague promises about "upside potential" - a demonstrable history of rewarding entrepreneurial brokers properly, including through multiple successful shareholder events....
Ax
08 Oct, 2026
Permanent
Managing Director
Axco London, UK
Managing Director Location: UK / Hybrid - 2/3 days in our London office Salary: £170,000+ DoE per annum + Excellent Benefits Contract Type: Full Time, Permanent What We Can Offer You: 30 Days Annual Leave, Additional Holiday Purchase, Hybrid Working, Performance-Related Bonus, Life Assurance, Private Healthcare, Subsidised Gym Memberships, Cycle to Work Scheme, Discount Vouchers and Access to Wellbeing Resources. Why Do We Want You This is an opportunity to lead one of the most respected information businesses in the global insurance market. As Managing Director of Axco, part of Wilmington plc, you'll take full responsibility for the performance, strategy and growth of a business trusted by insurers, brokers and reinsurers around the world. With complete P&L accountability, you'll lead a team of recognised industry experts and help shape the next phase of Axco's success. We're looking for a commercially driven leader who can build on Axco's strong market...
PF
08 Oct, 2026
Permanent
Outsourcing Senior
Pro-Finance Wandsworth, London, UK
Outsourcing Senior Associate Competitive salary + benefits Central London Hybrid working I'm working with a longstanding accountancy and tax advisory firm that is looking to appoint an Outsourcing Senior Associate into its Central London team. This is a strong opportunity for a qualified ACA or ACCA accountant who enjoys management accounts, statutory accounts, client contact and cloud accounting, and wants to join a firm with real heritage, a strong culture and the backing of a growing Top 35 accountancy group. The firm works with entrepreneurial businesses, private clients and international groups, with particular strengths across technology, venture capital, corporate finance and international advisory work. It is a good fit for someone who wants a varied outsourcing role, strong client exposure and the chance to develop within a progressive, people-focused environment. The Role As Outsourcing Senior Associate, you will support a varied client portfolio across...
RH
08 Oct, 2026
Permanent
International Financial Controller
Robert Half London, UK
Robert Half are delighted to be partnering with a highly successful international asset-focused investment and advisory business. With operations spanning Europe, Asia Pacific and North America, the organisation operates within a complex, fast-paced and commercially driven environment, providing a broad range of asset, lending, investment and advisory solutions. Following continued growth and expansion, the business is seeking an experienced Director of International Financial Control to lead its finance function across EMEA and APAC. This is a high-profile leadership opportunity for an accomplished finance professional looking to combine technical excellence with commercial influence. Reporting into senior global leadership, you will take ownership of financial control, reporting, compliance, treasury, tax and finance operations across multiple international jurisdictions while leading the continued development of a scalable, best-in-class finance function. Key...
Barker Ross
02 Oct, 2026
Permanent
HR Advisor
Barker Ross London, UK
HR Advisor - Build Your Future with a Global Leader Are you ready to accelerate your HR career within a forward-thinking, international organisation where your impact will truly matter? We're looking for an ambitious, driven, and people-focused HR Advisor to join a market-leading, globally recognised business at an exciting stage of growth. This is more than just a role-it's an opportunity to become a trusted partner to senior leaders, shape workplace culture, and develop your expertise in a fast-paced, high-performing environment. Why This Role? As the organisation continues to expand, the HR function plays a pivotal role in enabling success. You'll be at the heart of that journey-supporting strategic growth while gaining exposure to complex HR challenges and real career progression opportunities within a multinational business. Based from the Brixton office, you'll also have the opportunity to travel across multiple sites around the South East and Kent areas building strong,...
FG
02 Oct, 2026
Permanent
Microsoft Purview Consultant
FDM Group London, UK
About The Role FDM is a global business and technology consultancy seeking a Microsoft Purview Consultant, specialising in unstructured data governance, to work for our client within the Lloyd's Market and marine insurance sector. This is initially a 12-week contract with very good prospects to extend and will be a hybrid role based in London, with attendance at the client site as required. Our client is seeking an experienced consultant to deliver the discovery, classification and governance of unstructured information across its Microsoft 365 and on-premises data estate. You will configure Microsoft Purview Information Protection capabilities, develop a sector-appropriate sensitivity-label taxonomy and introduce automated classification and data loss prevention controls. Working with IT, compliance and legal stakeholders, you will translate technical findings into practical governance recommendations and contribute to the documentation required for testing, deployment...
CO
02 Oct, 2026
Permanent
Lead Android Engineer
Capital One UK Islington, London, UK
White Collar Factory (95009), United Kingdom, London, London Lead Android Engineer Job Title: Lead Android Engineer Location: London - Hybrid Working Pattern: 3 days in-office (Tuesday-Thursday) and 2 days remote. Our Mission We're on a mission to be a force for good in lending. Throughout our almost 30-year history, we've consistently been recognised as a great place to work; in 2026, Capital One was officially ranked 9th in the UK's Best Workplaces list. Hear from our team about what it's like working at Capital One UK. You and the Role Working in and across tech teams is a natural part of our outcome-based culture, so you'll have plenty of opportunity to talk, coach and learn with many great and diverse individuals. As part of our mobile platform engineering team, you will set the pace for multiple mobile engineering teams and take ownership of the fully native mobile apps that our customers love. Please apply if you are...
Ad
01 Oct, 2026
Permanent
Senior Back End Engineer
Addition London, UK
Backend Developer - Java/Spring Boot Start Date: ASAP Contract Outside IR35 £475 per Day Duration: Until the End of March Location: Fully Remote We're partnering with a fast-paced, technology-led organisation to appoint an experienced Backend Developer on a fully remote contract. This is an excellent opportunity for a hands-on developer with strong Java and Spring Boot experience to build and develop scalable backend systems within a high-volume engineering environment. We're particularly interested in candidates with previous experience in iGaming, betting, FinTech or another sector where reliability, scalability and performance are critical. The Opportunity As Backend Developer, you'll work as part of an established engineering team to design, develop and improve backend services and microservice-based applications. You'll use Java and Spring Boot to create reliable, scalable solutions, develop REST APIs and support systems handling high...
Gleeson Recruitment Group
01 Oct, 2026
Permanent
Private Client Tax Manager
Gleeson Recruitment Group London, UK
Private Client Tax Manager City Hybrid 3 days in office Advise international families and individuals, with direct access to the partners Work with a highly collaborative private client tax team at a mid-tier firm, advising high and ultra-high net worth individuals and families on complex UK and cross-border tax matters. This is an advisory-led role for someone who wants to spend their time on planning, structuring and client relationships, backed by strong compliance experience. Why join Advisory-led work. You'll provide practical, clear advice on residency, global mobility, offshore trusts and structures, and international succession and estate planning, not just compliance. Direct partner access. You'll work closely with an International Tax Partner and collaborate with partners across the firm, with a high degree of autonomy and real exposure to senior decision-makers. Complex, varied clients. The client base is international, with offshore...
Calibre Search
30 Sep, 2026
Permanent
Senior Structural Design Engineer
Calibre Search London, UK
Senior Structural Engineer Central London There are plenty of Structural Engineering roles in London. This one is a little different. I'm working with a major multidisciplinary Engineering Consultancy that is looking to strengthen its London Structures team with a Senior Structural Engineer, with much of the workload centred around secure, technically demanding projects for the MOD, Ministry of Justice and wider public-sector estate. It means the work tends to be considerably more involved than simply designing another commercial office or residential scheme. Projects can include new-build facilities, upgrades and extensions to existing assets, refurbishment, structural assessment and investigation, strengthening works and the adaptation of buildings where security, resilience, buildability and the constraints of an operational site all need to be considered alongside the structural design itself. The Consultancy has a long-established presence across defence, government...
Aldwych Consulting
30 Sep, 2026
Permanent
Project Manager
Aldwych Consulting London, UK
Project Manager - Infrastructure London Construction Consultancy Permanent Big business opportunities. Small team exposure. A career with room to grow. I'm recruiting on behalf of an established, multidisciplinary construction consultancy looking to appoint a Project Manager to join its growing Infrastructure team in London. This is a particularly interesting opportunity for someone who wants the backing, resources and project portfolio of a large consultancy, but with the close-knit environment and individual exposure of a much smaller team. You'll be joining a business with an impressive presence across the built environment, working alongside experienced professionals on a varied portfolio of infrastructure projects, including rail, aviation, civil engineering and Environment Agency schemes. The team is small enough for you to make a genuine impact, take ownership and build strong relationships with senior colleagues and clients, while benefiting from the wider...
RT
30 Sep, 2026
Permanent
Operations Manager
Reed Talent Solutions London, UK
Key Responsibilities: Support the end-to-end operational delivery of a major launch event in Germany. Manage key elements of the event operations budget, including forecasting, cost tracking, and reporting to the Head of Operations. Negotiate supplier and contractor costs to ensure maximum value and cost efficiency. Work effectively within defined budget parameters and adapt to changing financial requirements. Collaborate closely with the Senior Operations Manager, Head of Operations, venue partners, exhibitors, and internal teams to support all build and breakdown activities in line with Health & Safety regulations and Clarion EMEA standards. Manage the development of risk assessments and ongoing health & safety planning. Manage the maintenance of accurate and compliant health & safety documentation for the event, producing a complete and verified Health & Safety file. Attend relevant health & safety training sessions and engage proactively...
Rullion Managed Services
26 Sep, 2026
Contract
Senior Flutter Engineer
£650 - £750 daily
Rullion Managed Services London, UK
Senior Flutter Engineer Full-time Inside IR35 Hybrid 1 office day London Farringdon office address: 47-53 Charterhouse St, London, EC1M 6PB Join a dynamic energy provider dedicated to sustainable solutions in the UK. We are seeking an experienced Senior Flutter Engineer to join a fast-paced development team delivering high-quality mobile applications. You will play a key role in designing, developing, and maintaining cross-platform applications using Flutter, while contributing to architecture decisions, code quality, and engineering best practices. Initially it will be a six-month contract but there is potential for it to be extended. The role is Hybrid, with one day a week being based in their London. It is a full-time role, 37 hours per week. If this role feels right, send us your CV. Accountabilities: Design, develop, and maintain scalable Flutter applications for iOS and Android. Collaborate with Product Managers, UX/UI Designers, and Backend...
Gleeson Recruitment Group
25 Sep, 2026
Permanent
Private Client Tax Manager
Gleeson Recruitment Group London, UK
Private Client Tax Manager City Hybrid 3 days in office Advise international families and individuals, with direct access to the partners Work with a highly collaborative private client tax team at a mid-tier firm, advising high and ultra-high net worth individuals and families on complex UK and cross-border tax matters. This is an advisory-led role for someone who wants to spend their time on planning, structuring and client relationships, backed by strong compliance experience. Why join Advisory-led work. You'll provide practical, clear advice on residency, global mobility, offshore trusts and structures, and international succession and estate planning, not just compliance. Direct partner access. You'll work closely with an International Tax Partner and collaborate with partners across the firm, with a high degree of autonomy and real exposure to senior decision-makers. Complex, varied clients. The client base is international, with offshore structures, dual...
Enmase Group
23 Sep, 2026
Permanent
Business Development Manager - Commercial Heat Pumps
Enmase Group London, UK
We are hiring a Business Development Manager to drive UK sales growth across a commercial heat pump range for an energy technology business. This is a field-based role suited to a high-performing technical sales professional who can win new business and develop strong long-term relationships with commercial and industrial customers, consultants, contractors and installers. The focus is on a high-efficiency commercial heat pump offering developed using propane turbocompressor technology with COP levels up to 7.2. This role would suit someone currently selling commercial heat pump solutions and ideally coming from a recognised manufacturer within the sector. Key Responsibilities: Develop new B2B relationships with consultants, M&E contractors, developers, specifiers and end users across the commercial heat pump market. Identify, qualify and convert new sales opportunities for commercial heat pump projects across the UK. Manage the full sales cycle from...
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