30 senior lead software engineer jobs found

Role: Senior / Lead Software Engineer (Python, Django) Type: 12 Months Contract Location: London / Manchester / Birmingham / Cardiff / North East, UK Working Model: Hybrid (2 days per week in Office) Payrate: £600 - £750 per Day on Inside IR35 via Umbrella What You'll Do: Lead end-to-end system design and delivery using Python and Django. Write secure, test-driven code and maintain live service performance. Work in an Agile, multidisciplinary team aligned with Government Digital Service (GDS) standards.What We Need: 5+ years experience (ideally 8-10 years). Deep technical expertise in Python & Django. Proven system design and architecture capabilities. Strong communication and collaborative problem-solving skills.Bonus: Previous experience with GDS standards, the public sector (e.g., MOD, HMRC), or secure defence environments. This is an urgent vacancy with a deadline where the hiring manager is shortlisting for an interview immediately. Please apply with a copy of your...

Role: Senior / Lead Software Engineer (Python, Django) Type: 12 Months Contract Location: London / Manchester / Birmingham / Cardiff / North East, UK Working Model: Hybrid (2 days per week in Office) Payrate: £600 - £750 per Day on Inside IR35 via Umbrella What You'll Do: Lead end-to-end system design and delivery using Python and Django. Write secure, test-driven code and maintain live service performance. Work in an Agile, multidisciplinary team aligned with Government Digital Service (GDS) standards.What We Need: 5+ years experience (ideally 8-10 years). Deep technical expertise in Python & Django. Proven system design and architecture capabilities. Strong communication and collaborative problem-solving skills.Bonus: Previous experience with GDS standards, the public sector (e.g., MOD, HMRC), or secure defence environments. This is an urgent vacancy with a deadline where the hiring manager is shortlisting for an interview immediately. Please apply with a copy of your...

Role: Senior / Lead Software Engineer (Python, Django) Type: 12 Months Contract Location: London / Manchester / Birmingham / Cardiff / North East, UK Working Model: Hybrid (2 days per week in Office) Payrate: £600 - £750 per Day on Inside IR35 via Umbrella What You'll Do: Lead end-to-end system design and delivery using Python and Django. Write secure, test-driven code and maintain live service performance. Work in an Agile, multidisciplinary team aligned with Government Digital Service (GDS) standards.What We Need: 5+ years experience (ideally 8-10 years). Deep technical expertise in Python & Django. Proven system design and architecture capabilities. Strong communication and collaborative problem-solving skills.Bonus: Previous experience with GDS standards, the public sector (e.g., MOD, HMRC), or secure defence environments. This is an urgent vacancy with a deadline where the hiring manager is shortlisting for an interview immediately. Please apply with a copy of your...

Role: Senior / Lead Software Engineer (Python, Django) Type: 12 Months Contract Location: London / Manchester / Birmingham / Cardiff / North East, UK Working Model: Hybrid (2 days per week in Office) Payrate: £600 - £750 per Day on Inside IR35 via Umbrella What You'll Do: Lead end-to-end system design and delivery using Python and Django. Write secure, test-driven code and maintain live service performance. Work in an Agile, multidisciplinary team aligned with Government Digital Service (GDS) standards.What We Need: 5+ years experience (ideally 8-10 years). Deep technical expertise in Python & Django. Proven system design and architecture capabilities. Strong communication and collaborative problem-solving skills.Bonus: Previous experience with GDS standards, the public sector (e.g., MOD, HMRC), or secure defence environments. This is an urgent vacancy with a deadline where the hiring manager is shortlisting for an interview immediately. Please apply with a copy of your...

Senior Network Engineer – NSX (JFF5) – 1736 Location: Yeovil, Somerset  Onsite: Full time on site (flexible extended hours available) Duration: 6 months Rate: £92.53 Per hour (Umbrella) Security Clearance: Active DV clearance or lapsed DV is required due to the sensitive nature of the project Your Impact Do you want to grow your career in network engineering and work on projects that safeguard some of the UK’s most critical systems? As a Senior Network Engineer, you will play a key role in designing, configuring, and supporting secure network environments that keep critical services connected and protected. You will lead the resolution of complex customer challenges in an agile, innovative, and collaborative environment. This role requires close engagement with technical teams, stakeholders, and customers to ensure successful delivery of secure networking solutions. We are seeking a Senior Network Engineer with strong NSX / network virtualisation expertise to support the...

Working Environment Data engineering work is grounded in real operational needs, often involving imperfect data, technical constraints and organisational complexity. Engineers work closely with delivery teams and stakeholders to understand problems end to end and deliver robust, production-grade solutions. Collaboration, pragmatism and persistence are valued, alongside strong engineering craft. What You'll Be Doing - Design, build and improve enterprise-scale data pipelines, platforms and services - Lead complex data engineering work end to end, from problem definition through build and operational use - Work directly with technical and non-technical stakeholders to translate real problems into effective data solutions - Engineer data integrations across diverse systems, including legacy and modern platforms - Build production-grade data solutions using strong software and data engineering practices - Improve data quality, lineage and metadata as first-class engineering...

Working Environment You'll operate in production-focused environments where platform usability and operational excellence matter. The work sits at the intersection of platform engineering, DevOps and MLOps, with close collaboration across data science, ML engineering, software engineering and architecture. The role requires comfort working 'in the weeds' - understanding how platforms behave under real workloads, and designing guardrails that balance flexibility for users with reliability, security and governance. What You'll Be Doing - Provide technical leadership across platform engineering, DevOps, and MLOps activities - Design, build, and operate a Kubernetes-based MLOps platform that supports the full model lifecycle - Implement and operate MLOps tooling and frameworks enabling teams to build, train, deploy, and serve models - Develop and support model serving and inference capabilities within Kubernetes environments - Implement workflows that support model...

Working Environment You will operate with a high degree of autonomy, owning work end-to-end and engaging closely with both technical and non-technical stakeholders. Delivery is supported by a strong technical assurance and review culture, encouraging challenge, learning and high standards. You will work within security, compliance and governance constraints where quality and judgement matter as much as pace. What You'll Be Doing Lead end-to-end delivery of machine learning solutions, from problem definition through experimentation, evaluation and iteration Develop, validate and deploy machine learning models into production environments Apply statistical, mathematical and scientific thinking to frame hypotheses and assess uncertainty Design and run experiments to evaluate model behaviour, performance and user impact Work with real, imperfect data drawn from operational systems and workflows Integrate machine learning components into wider software and data platforms Balance...

What You'll Be Doing - Provide technical leadership across AI-enabled software and DevOps engineering teams - Set architectural direction for API-first design, system integration, and platform enablement for AI - Lead the evolution of legacy or existing applications towards modern, service-based and API-driven architectures - Define and guide integration patterns between applications, platforms, and AI services - Make informed decisions on when and how emerging integration approaches (e.g. protocols such as MCP) should be applied as part of broader system design - Work closely with architects, product teams, data scientists, and platform engineers to deliver end-to-end solutions - Ensure solutions meet appropriate standards for security, resilience, performance, and operability - Anticipate and manage architectural and operational risks associated with AI-enabled systems - Champion strong engineering practices across software development, DevOps, and platform engineering...

Principal Platform Engineer - Ref: 1733 Initial contract until 27/12/26 £98.82ph, UMB, inside IR35 Yeovil - Full time onsite Please note, DV clearance is required for this positon and the programme will have "UK Eyes Only" restrictions. Your Impact Are you ready to take on complex technical challenges at the forefront of cyber and platform engineering? At Leonardo, our Principal Platform Engineers are hands-on experts who shape the design, integration, and delivery of secure platforms that keep our customers' missions running. Your work at Leonardo UK will see you take the lead in solving customer problems in an agile, innovative and team-centric manner. The role may involve a blended hybrid working model, with a mixture of working from home and working on site at one of our Leonardo offices to ensure close collaboration with the wider team and with our customers. Leonardo UK is seeking a Principal Platform Engineer to join the Cyber & Security Solutions Division...

Backend Software Engineer (Java & Identity Access Management) 7 Months 4 Days per week on site (Basildon) £593.48 per day (Inside IR35) My client in the automotive industry are looking for an experienced Senior Backend Software Engineer to join our Identity Management Services team, focusing on the core platform work that powers our identity infrastructure. In this role, you will design and build high-scale backend services while serving as a technical lead to upskill the team in modern, industry-leading application development. You will be responsible for ensuring the plaatform is secure and resilient, leveraging your deep engineering expertise to elevate the team's technical standards and foster a culture of excellence in backend engineering. OAuth would be very beneficial Skills Required: - Proficiency in Java - Java Framework - Web development - DevOps practices (CI/CD, version control) - Security and identity management - Monitoring and logging - Relational...

The Opportunity We are recruiting for an experienced Senior Site Engineer to join one of the UK's leading construction and civil engineering contractors on a major infrastructure project in Herefordshire. The business has an outstanding reputation for delivering complex, high-value projects across infrastructure, highways, defence, rail, energy, and major civil engineering sectors. Known for technical excellence, innovation, and delivering some of the country's most challenging construction schemes, they continue to invest in both their people and projects while maintaining the highest standards of safety, quality, and engineering delivery. This is an excellent opportunity to work on a prestigious long-term project where you will play a pivotal role in the engineering delivery of major civils and structural works. The Role As Senior Site Engineer, you will take ownership of all engineering activities across your section of works, ensuring construction is delivered safely,...

Lead Backend Software Engineer – Data Services Federated Data Services | Distributed Systems | Apache Spark | DataFusion | Python | Kubernetes Location: London (2 days per week onsite) Rate: £700–£800 per day (Outside IR35) Duration: Initial 6-month contract with likely extension Overview We're looking for an experienced Lead Backend Software Engineer to join a high-profile programme building secure, cloud-native data services that will support data-driven research and innovation at national scale. This is a founding engineering role, offering the opportunity to shape the architecture, engineering standards, and core data services from the ground up. Working closely with the Engineering Manager and a small team of senior engineers, you'll establish the technical foundations for a complex federated data platform operating within a highly regulated environment. We're looking for someone who enjoys building from first principles, thrives in ambiguity, and can balance strategic...

Lead Software Engineer  London, Manchester, Birmingham, Cardiff or Northeast (Darlington) Role Overview: We are seeking an experienced Lead Software Engineer for a leading public sector organisation to support the design, development, and continuous improvement of secure, user-centred digital services. Working within a large-scale Agile environment, you will be responsible for designing, building, and maintaining scalable software solutions using Python and Django, while providing technical leadership across multidisciplinary teams. This is an excellent opportunity for a senior engineer to take ownership of complex systems, contribute to end-to-end architecture and delivery, and play a key role in ensuring the performance, resilience, and ongoing evolution of critical services within a highly regulated environment. Key Responsibilities Lead the design and delivery of scalable, secure software solutions Translate user requirements into high-quality technical implementations...

Senior Design Engineer - Highways (6-Month Contract) Based in Glasgow, Edinburgh or Leeds (Flexible) 6 Months (possibility of extension and future works) Sector: Highways & Transportation Infrastructure Our client is seeking an experienced Senior Design Engineer to support the delivery of a diverse portfolio of transportation and infrastructure projects across the UK. This is an exciting opportunity for a highly motivated highways professional to join a multidisciplinary team on a six-month contract, with flexibility to be based in Glasgow, Edinburgh, or Leeds. The Role: As a Senior Design Engineer, you will be responsible for leading the design and delivery of highways projects from concept through to detailed design. You will work closely with multidisciplinary teams and clients to provide technical expertise and ensure successful project outcomes. Responsibilities: Lead the design and delivery of highways and transportation infrastructure projects. Develop and...

Quantitative Engineer - Exotic Derivatives (Contract) Location: London, UK (Hybrid/On-site) Engagement: Contract (Inside IR35) Duration: 12 months Rate: £750-£800 per day (via an umbrella company) About the Role We are seeking a Distinguished Quantitative Engineer for a high-impact, senior individual-contributor contract role based in London. This is a position for a seasoned professional with 15+ years of demonstrable experience independently designing, implementing, and delivering production-grade pricing and risk models for complex exotic derivatives across Equity, Rates, FX, and Commodities. We require deep, hands-on ownership. You will be responsible for everything from mathematical formulation and numerical implementation to performance optimisation and direct contribution to live analytics and trading systems. What You Will Do End-to-End Model Ownership: Independently design, implement, and validate pricing and risk models for complex and exotic OTC derivatives...

The RLE INTERNATIONAL Group is one of the world's leading providers in the fields of vehicle development, technology and consulting. On the basis of more than 40 years of development & consulting, we provide innovative and effective solutions for our UK customers in the area of Automotive Engineering. RLE INTERNATIONAL is represented at locations close to its customers in Europe, Asia and USA. Job Title: Senior Systems Engineer – Energy Storage Systems Rate: Negotiable (in line with experience) Location: Oxford/Banbury – 3 months (potential to extend) Job Description: We are seeking a Systems Engineer to support the development and integration of an energy storage program utilizing electric motors, power inverters, and battery systems. The Systems Engineer will be responsible for defining system requirements, ensuring subsystem integration, managing technical risks, and supporting the full system lifecycle from concept through deployment and operation. Key...

Working Environment The organisation is building momentum in AI but remains relatively early in its maturity. This creates both ambiguity and opportunity. You will work closely with engineers, technical leaders, product and delivery colleagues, supporting teams as they learn, adapt and scale AI-enabled engineering practices. Success depends on judgement, empathy and clear communication as much as technical understanding. What You'll Be Doing - Provide leadership and support to engineering teams delivering AI-enabled products and platforms - Act as a visible engineering leader, shaping culture, collaboration and professional standards - Support the adoption of AI-assisted development practices to improve delivery and quality - Work with senior engineers and technical leads to influence technical decisions and delivery approaches - Help teams navigate change, ambiguity and evolving priorities - Translate technical concepts for non-technical stakeholders where needed - Build...

3D Design Engineer (Inventor) with BIM Experience – Outside IR35 Contract – 6 Months Rolling – Carlisle (Office based) – Hourly rate Our leading engineering client is seeking 3D Design Engineer with BIM experience on a rolling contract basis. The successful candidate will be required to work on-site, utilising company systems and IT infrastructure (PC equipment will be provided). In addition to core design duties, this individual will take on the named responsibility of BIM Co-ordinator across projects, ensuring all digital deliverables comply with the project BIM Protocol and applicable standards (including ISO 19650). This is a dual-function role requiring strong technical design capability alongside proven BIM management experience. Duties: * Produce detailed 3D models and engineering drawings using Autodesk Inventor. * Develop design deliverables to the required standard, in line with project programme and milestones. * Collaborate with the wider engineering team...

Principal EC&I Engineer   Certain Advantage are recruiting on behalf of our established Engineering client for a number of Principal EC&I Engineers on a contract basis to support important Nuclear projects in the UK.   They require EC&I professionals to Guide EC&I engineering teams in providing innovative solutions for complex projects and who can offer strong proficiency in EC&I project delivery with experience covering: Design Reviews: Serve as Lead Engineer overseeing design reviews, technical discussions, and formal evaluations. Mentoring: Mentor team members, set clear objectives, and promote a collaborative and high-performing environment. Optimisation: Work closely with Project Managers to ensure projects are delivered on schedule and within budget.Your background Working knowledge of BS EN 60909 Fault Calculations Working knowledge of power distribution modelling software Experience with Protection and control systems (11kV & 400V) Experience...