60 senior software developer jobs found

Senior Software Developer (Contract) Location: Warton - Hybrid (3 days per week on site) Rate: £46.80 per hour (Umbrella) Contract Length: 12 months IR35: Inside IR35 Overview A leading UK defence company is seeking an experienced Senior Software Developer to join a highly skilled engineering team working on mission‑critical, safety‑critical systems used by military personnel. This role involves developing and maintaining a suite of engineering support applications that enable frontline users to retrieve operational data, diagnose issues, and ensure continued system availability in demanding environments. The position offers hybrid working and the opportunity to contribute to long‑term, high‑integrity software programmes within the defence sector. The Role You will work on a mature .NET desktop application estate, contributing to both enhancement and ongoing support activities. The software environment blends established systems with opportunities for modernisation and...

Senior Software Developer (Contract) Location: Warton - Hybrid (1-2 days onsite) Rate: £46.80 per hour (Umbrella) Contract Length: 12 months IR35: Inside IR35 Overview A leading UK defence company is seeking an experienced Senior Software Developer to join a highly skilled engineering team working on mission‑critical, safety‑critical systems used by military personnel. This role involves developing and maintaining a suite of engineering support applications that enable frontline users to retrieve operational data, diagnose issues, and ensure continued system availability in demanding environments. The position offers hybrid working and the opportunity to contribute to long‑term, high‑integrity software programmes within the defence sector. The Role You will work on a mature .NET desktop application estate, contributing to both enhancement and ongoing support activities. The software environment blends established systems with opportunities for modernisation and...

Senior Software Developer (Contract) Location: Warton - Hybrid (1-2 days onsite) Rate: £44.31 per hour (Umbrella) Contract Length: 12 months IR35: Inside IR35 Overview A leading UK defence company is seeking an experienced Senior Software Developer to join a highly skilled engineering team working on mission‑critical, safety‑critical systems used by military personnel. This role involves developing and maintaining a suite of engineering support applications that enable frontline users to retrieve operational data, diagnose issues, and ensure continued system availability in demanding environments. The position offers hybrid working and the opportunity to contribute to long‑term, high‑integrity software programmes within the defence sector. The Role You will work on a mature .NET desktop application estate, contributing to both enhancement and ongoing support activities. The software environment blends established systems with opportunities for modernisation and...

Job Title: Senior Software Developer Location: Remote (South England) Estimated Duration: 6 months Weekly hours : 40 hours Engagement Type: Outside IR35-Limited contract Rate: £500 - £600 per day Our Client is an Energy technology company are seeking to recruit Senior Software Developer and this is a Remote role. The role is for a contract position of 6 months Outside IR35. Our client has 150-year legacy of innovation and will focus on energy transformation, new technologies, decarbonization and Innovative leading-edge technology. Role: Role Overview This is a 6 month contractor assignment for an experienced Senior Software Developer with a strong focus on business analysis and pre-development solution shaping within a finance environment. The role is designed to provide short-term, high-impact support to Finance and Digital teams by ensuring business needs are clearly understood, analysed and translated into actionable requirements before development begins. Key...

Rubicon Consulting is currently recruiting for a Senior Software Developer on a 6 month contract, based remote. Role Overview This is a contractor assignment for an experienced Senior Software Developer with a strong focus on business analysis and pre-development solution shaping within a finance environment. The role is designed to provide short-term, high-impact support to Finance and Digital teams by ensuring business needs are clearly understood, analysed and translated into actionable requirements before development begins. Key Responsibilities · Engage with Accounting, Controlling and FP&A stakeholders to elicit, clarify and challenge requirements before software development starts. · Analyse current-state and target-state finance processes, identifying inefficiencies, risks and opportunities for simplification. · Translate business needs into clear, prioritised functional and non-functional requirements suitable for delivery teams. · Act as the initial gatekeeper...

Rubicon Consulting is currently recruiting for a Senior Software Developer on a 6 month contract, based remote. Role Overview This is a contractor assignment for an experienced Senior Software Developer with a strong focus on business analysis and pre-development solution shaping within a finance environment. The role is designed to provide short-term, high-impact support to Finance and Digital teams by ensuring business needs are clearly understood, analysed and translated into actionable requirements before development begins. Key Responsibilities · Engage with Accounting, Controlling and FP&A stakeholders to elicit, clarify and challenge requirements before software development starts. · Analyse current-state and target-state finance processes, identifying inefficiencies, risks and opportunities for simplification. · Translate business needs into clear, prioritised functional and non-functional requirements suitable for delivery teams. · Act as the initial gatekeeper...

Job Advertisement: Senior Technical Business Analyst / Developer (Ruby on Rails) Duration: 6 months (with potential extension) Location: Remote IR35: Outside IR35 Join Our Dynamic Team! Are you a passionate Senior Software Developer with a knack for business analysis and a love for solving complex problems in the finance sector? If so, we have an exciting opportunity for you! Our client is seeking a talented professional for a temporary 6-month contract to support their Finance and Digital teams, and we want to hear from you! About the Role: In this vital position, you will play a key role in shaping software solutions that meet business needs before development kicks off. With your expertise in Ruby on Rails and business analysis, you will ensure that the requirements are not just understood but also prioritised and actionable. Your contributions will drive impactful changes and streamline finance processes. What You Bring: Hands-on experience with Ruby on Rails, including...

IDAM Back-end Java Developer - SC Cleared Rate: £500 - £535 a day IR35: Inside IR35 Location: Remote within the UK Duration: Initially 6 months Clearance: Active SC Clearance required You will join a global IT consultancy who are delivering digital transformation to public sector body. They are looking for a back-end Java Developer with proven IDAM (Identity and Access Management) experience. You will be part of a continuous improvement squad delivering enhancements and new features alongside BAU work (i.e. incidents and support maintenance activities). In addition, you will be involved in helping our client transform their IDAM service, re-platforming to Azure Kubernetes Service. You will have a solid understanding of modern deployment pipelines and DevOps principles. The role will require providing out of hours support (i.e. Monday to Saturday once per month). As a Senior Software Engineer with a focus on back-end development, you will play a key role in designing,...

I am currently working with a London-based financial services client who are actively seeking 3 Senior Java developers to assist in the development and maintenance of a business-critical system in the Equity Derivatives space. What you'll need to succeed: 10+ years' server side Java development experience. Strong commercial software development experience in financial services, ideally investment banking. Strong experience with CI/CD pipelines. Strong experience with Oracle. Strong experience with Linux/Unix. Strong cloud experience, ideally AWS. Good knowledge across a range of asset classes. What you'll get in return: Up to £850pd Umbrella London-based hybrid working. Initial 6-month contract with extensions. What you need to do now: If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now. If this job isn't quite right for you, but you are looking for a new position, please contact us for a confidential discussion about...

Salesforce Technical Lead - Remote - Public Sector - £700 per day We are seeking an experienced and hands-on Salesforce Technical Lead with strong development skills and relevant certifications, to join our UKI Salesforce practice in London, focusing on clients in the Public Sector Domain. As a Technical Lead, you will operate as a senior technical authority within the Salesforce practice, partnering with Solution Architects, Functional Leads, and client stakeholders to deliver scalable, secure, and high-performing solutions aligned to business outcomes. This role will lead technical workstreams across complex programmes, providing architectural oversight, engineering leadership, and technical assurance while mentoring delivery teams. What you'll be doing: Serve as a trusted advisor to key stakeholders within our Public Sector clients. Leading communication and stakeholder management, acting as the focal point between the client team and the development team (with support of...

Senior Data Scientist / Product Analyst II - Engineering Platform Location: London, UK (Hybrid) The Mission Behind every global streaming giant is a massive engine of internal tools and infrastructure. We are looking for a data expert to join our Platform Insights team. Your "customers" aren't the end listeners-they are the hundreds of world-class engineers building the applications used by millions. Your goal is to optimize the developer experience, ensuring our internal systems are fast, stable, and scalable. What You'll Do Drive Product Strategy: Partner with Product Managers and Engineers to define what "success" looks like for internal developer tools and cloud infrastructure. Full-Stack Analytics: Define key metrics, build robust datasets, and create high-impact dashboards (SQL/Python). Exploratory Research: Deep-dive into technical logs and user behavior to identify friction in the software development lifecycle. Influence Change: Communicate technical insights to...

DevSecOps Consultant * Sheffield (3 days per week onsite) * Inside IR35 We're partnering with a leading financial services client to appoint a DevSecOps Consultant to drive secure engineering practices across large-scale, cloud-based platforms. This role is ideal for someone who has come from a hands-on DevSecOps Engineering background and has since transitioned into architecture/design and advisory, while still retaining strong technical depth. Key Responsibilities: * Define and implement secure architecture patterns across engineering platforms (CI/CD, build systems, runtime environments) * Conduct security assessments, threat modelling, and gap analysis across platforms and pipelines * Develop and embed DevSecOps best practices, including secure pipeline design and automated controls * Establish and enforce security baselines using policy-as-code * Build and deliver security roadmaps, prioritising risk and regulatory requirements * Partner with engineering and...

Our client is looking for an experienced Responsible for a Housing Advice and Options Manager. You will be inccharge of x5 Team Leaders, x1 Senior Landlord Liaison Officer, x1 Reviews Officer in the Directorate and Service area: Strategic Housing, Development and Property Services (Adults, Health Partnerships and Housing (DASS), and Children’s Services) Ideally someone who is experienced in private rented sector access work, and who is feeling prepared for the changes coming on 1 May (Renters Rights Act). They are looking for a strong leader, and someone that can performance manager and drive forward service improvement. Principal responsibilities * Responsible for the management, delivery and performance of a housing advice and options service, including casework and homelessness assessments, ensuring the client meets its statutory duties in line with legislation, guidance, caselaw and the Council’s Homelessness and Rough Sleeping Strategy. * Ensure appropriate and prompt...

Job Title: SC Cleared Senior Integration and Test Engineer Location: Farnborough 3 days per wek with occasional travel to BUTEC Duration: 6 months with possible extension Rate: Up to £650 per day via an approved umbrella company Must be willing and eligible to go through the SC Clearance process Our client, a leading organisation in defence and technology, is hiring for a reputable company to find a Senior Integration and Test Engineer to join their Maritime project. This is a fantastic opportunity to lead technical integration and testing activities within a dynamic environment, working closely with project teams, stakeholders, and customers. What you'll be doing: * Manage the end-to-end integration of software, hardware, and firmware into complex systems across multiple environments. * Drive testing and integration efforts at the British Underwater Test and Evaluation Centre (BUTEC) and Farnborough reference facilities. * Collaborate with project managers and...

Software Developer - 12 Months Contract - 625/day I am looking to speak to Python Developers, in relation to a 12 months contract on a high profile transformation programme. This is a long-term assignment on one of the most challenging programmes across the Public Sector, and it's not an understatement to say your work will impact the lives of millions across the UK. Details need to remain vague, due to the nature of the assignment, however the central requirements are: Eligible to get a SC Clearance (ideally active for a quicker start) Python AWS CDK Experience of using AI / Prompt engineering to aid development Call me, Alex Manea, at NonStop Recruitment now for a confidential conversation. Contact me on (email address removed) or (phone number removed), please send your CV in word format OR if this does not sound like the opportunity for you, but you are a professional working across the Public Sector, please feel free to get in touch, to see other opportunities we may...

Mechanical Systems Installation Design Engineer Location South West England, Gloucestershire, Filton Job Type Contract (Full-Time hours) Primary Industry Aerospace and Aviation Secondary Industry Engineering Job Description As a Mechanical Systems Installation Design Engineer, you are responsible for the detailed design and integration of mechanical systems within aerospace platforms. You develop installation layouts, ensure compliance with technical specifications, and collaborate closely with cross-functional teams to deliver designs that meet safety, performance, and regulatory requirements. The role requires a thorough understanding of mechanical engineering principles applied to aerospace systems, with a strong focus on installation feasibility and maintainability. Key Duties and Responsibilities Design and develop mechanical system installation layouts, ensuring compatibility with existing structures and systems. Create detailed engineering drawings, models, and...

Software Developer - 12 Months Contract - 625/day I am looking to speak to Python Developers, in relation to a 12 months contract on a high profile transformation programme. This is a long-term assignment on one of the most challenging programmes across the Public Sector, and it's not an understatement to say your work will impact the lives of millions across the UK. Details need to remain vague, due to the nature of the assignment, however the central requirements are: Eligible to get a SC Clearance (ideally active for a quicker start) Python AWS CDK Experience of using AI / Prompt engineering to aid development Call me, Alex Manea, at NonStop Recruitment now for a confidential conversation. Contact me on (email address removed) or (phone number removed), please send your CV in word format OR if this does not sound like the opportunity for you, but you are a professional working across the Public Sector, please feel free to get in touch, to see other opportunities we may...

DevOps SME (AWS) 6 Months Contract | £60 to £80 per hour (Inside IR35) 📍Remote Working *Active SC Clearance is needed* A top tier pioneering firm is looking for an experienced devOps SME to support a critical initiative for a UK Public Sector end-client. This is a pivotal role within a high-performing Agile environment, focusing on the delivery of a secure, scalable, and automated DevOps toolchain. As an SME, you will not only be responsible for technical execution but will also provide the architectural foresight needed to maintain service stability and drive process optimisation. You will bridge the gap between complex engineering and business impact, ensuring that all cloud-native solutions are robust, secure, and performant. Key Responsibilities Create and manage automated scripts (using tools like Terraform or Ansible) so that complex computer systems can be set up quickly, reliably, and identically every time. Watch for signs that the system is slowing down or...

A contract position Inside IR35 Hybrid working - 3 days on site. Our client, a prominent player in the automotive sector, is seeking a Calibration Engineer for a contract position. This role focuses on delivering high‑quality powertrain/software calibrations, ensuring adherence to established change-control processes, and managing cross‑functional technical interactions across the calibration lifecycle. This opportunity is ideal for someone with strong technical leadership, problem-solving capabilities, and hands-on experience with calibration development tools, with CRETA proficiency being a mandatory requirement. Key Responsibilities: Accountabilities: Release high‑quality calibrations and provide OK/NOK for release readiness. Ensure full compliance with software and calibration change‑control processes. Core Responsibilities: Execute and maintain software & calibration change‑control activities, including ownership of issue resolution and continuous improvement....

A well-established client of ours are looking for a Project Manager for the delivery of essential infrastructure projects across electricity transmission, distribution, renewable energy and customer connection frameworks, with an emphasis on a National Grid substation in the Wiltshire area. This assignment will start 13/04/2026 and last 6 months. This would be an inside IR35 role. Key responsibilities: Lead multidisciplinary construction and engineering teams through end‑to‑end project delivery, ensuring alignment across civil, M&E, and commercial workstreams. Deliver projects to agreed time, cost, quality, and safety requirements. Drive a cohesive project team ethos across Construction Managers, Commercial Managers, Design Leads, and Project Engineers Provide strong safety leadership, including preparation and oversight of Health & Safety Plans, Method Statements, and Risk Assessments. Maintain the highest standards of HSEQ performance and ensure compliance with...