21 gas engineer jobs found in London

Job Title: AI Engineer / Data & AI Scientist (LLM, Generative AI, Python) We are recruiting for an AI Engineer / Data & AI Scientist to join a high-impact programme building next-generation conversational AI and generative AI platforms. This role focuses on developing production-grade LLM applications, agent-based AI systems and RAG pipelines used in large-scale customer-facing environments. This is an opportunity to work on advanced AI assistant and conversational AI technology, building scalable multi-agent architectures and generative search systems using modern AI frameworks. Key Responsibilities * Design and build LLM-powered applications using Python and Generative AI frameworks * Develop RAG (Retrieval Augmented Generation) pipelines and AI orchestration workflows * Build and deploy agent-based AI systems using tools such as LangGraph, CrewAI or similar frameworks * Engineer scalable AI infrastructure across Azure and GCP environments * Implement...

Developer Experience (DevEx) Engineer Location: London Contract Type: 12 months About the Role Guidant Global is supporting our client in hiring a Developer Experience (DevEx) Engineer to enhance the productivity, satisfaction and efficiency of engineering teams. This role focuses on improving tooling, workflows, documentation and internal platforms to ensure developers can build, test and deliver software quickly, reliably and with minimal friction. You'll be at the heart of engineering excellence - streamlining processes, advocating best practices, and championing a developer‑first mindset across technical teams. Key Responsibilities Design and build internal tools, libraries and services that improve developer workflows Optimise CI/CD pipelines for speed, reliability and developer efficiency Collaborate with engineering teams to identify pain points and automate repetitive tasks Maintain and improve developer documentation, onboarding guides and internal wikis Promote...

Kubernetes Platform Engineer Location: London Contract Type: 12 Months About the Role Guidant Global is supporting our client in hiring a highly skilled Kubernetes Platform Engineer to design, deploy and optimise scalable, resilient Kubernetes‑based solutions across modern cloud environments. This is an exciting, hands‑on engineering role where you'll collaborate with DevOps, software development and security teams to ensure seamless deployment, management and monitoring of containerised applications. If you're passionate about cloud‑native engineering, automation and modern infrastructure design, this is an opportunity to make a major impact. Key Responsibilities Design, implement and maintain Kubernetes clusters in cloud environments Develop and automate CI/CD pipelines to streamline application delivery Monitor, analyse and optimise cluster performance, reliability, scalability and security Create and maintain Helm charts and Kubernetes manifests Implement service mesh...

Full Stack Developer (GCP / Java / Python) – Contract – Hybrid Location: London Working Pattern: Hybrid (2–3 days onsite) Employment Type: Contract Role Overview We are looking for an experienced Full Stack Developer to join a platform engineering team delivering modern cloud-native applications. The role involves developing scalable solutions while supporting the transition of legacy monolithic systems to API-driven microservices architectures. You will work closely with engineering and DevOps teams to design, build, and deploy secure applications within a GCP-based cloud environment. Key Responsibilities * Design and develop scalable full stack applications * Build and integrate REST APIs and microservices * Work within Google Cloud Platform (GCP) environments * Support CI/CD pipelines and modern DevOps practices * Contribute to modernising monolithic systems into microservices architectures * Participate in code reviews...

Senior Infrastructure Engineer Central London £550 - £650 p/d - outside IR35 3 month initial term A well-established, growing business is seeking an experienced Senior IT Infrastructure Engineer to support both core infrastructure and M&A projects. This is a critical role during a period of ambitious expansion, including multiple acquisitions and integration of new sites. You will ensure seamless IT operations, business continuity and secure, resilient infrastructure across offices and acquired businesses. Key Responsibilities: * Lead the assessment, integration and consolidation of IT environments during mergers and acquisitions * Manage core office and site networks, including LAN/WAN, VPNs, IP addressing and firewall operations (FortiGate)u * Conduct audits of IT infrastructure, cloud environments (Azure, AWS) and enterprise applications (ERP, CRM) * Plan and execute migrations, including tenant-to-tenant Microsoft 365 and Active Directory consolidations *...

Software Engineer - Active SC, Java, Microservices Up to £550 per day (Inside IR35) London / Remote 6 months My client is an instantly recognisable consultancy who require a strong Software Engineer with Active Security Clearance (SC) and with deep expertise in Java (Spring Boot) to join a large-scale, business‑critical microservices programme. Key Requirements: Proven experience working as a Java Software Engineer on large microservice architectures Active Security Clearance (SC) Strong capability building scalable RESTful APIs and backend services in Java (Spring Boot): Postgres (or other relational SQL databases) with solid understanding of schema design and SQL Docker: Confident containerising and deploying applications Test‑Driven Development (JUnit & Mockito or similar testing frameworks) CI/CD: Hands‑on experience with Jenkins or similar automated pipeline tooling Flexibility working in agile teams and collaborating closely with engineers, product, and design...

Infrastructure Engineer £(Apply online only) per day - Umbrella only Dates: 23/02/2026 - 31/07/2026 Mostly remote but will need to be flexible to travel to London, Manchester and Leicester as required An infrastructure operations engineer is responsible for the preparation and support of IT operations solutions and services, physical or virtual. They do so according to industry and organisational best practices, standards, service requirements and Key Performance Indicators (KPIs) throughout the product life cycle. Create and maintain documentation. Perform all routine tasks according to process and checklists. Monitor infrastructure and applications services. Alert and take appropriate action Required Skills * Asset and configuration management. * Availability and capacity management. * Change Management. * Coding and scripting. * Continual service improvement. * Incident management. * Problem management. * Service management framework knowledge. * Testing. *...

System Engineer Location: East London (Hybrid – office/home) Rate: £450–£500 per day (Inside IR35) Duration: Initial 3–4 month contract (backlog clearance) with strong potential for extension or permanent conversion Client Environment: Major London Rail customers (TfL, Network Rail – station systems) Overview We are seeking a mid-to-senior Cybersecurity & Network Assurance Engineer to join a high-performing networks team supporting critical rail infrastructure in London. This role will focus on cybersecurity governance, assurance, and technical documentation, ensuring networked systems meet customer, regulatory, and industry standards. You will play a key role in clearing an immediate backlog of assurance deliverables while providing technical oversight to junior engineers and supporting SIEM integration activities. This is a hybrid East London role with no trackside/site access required. Key Responsibilities Cybersecurity Governance & Assurance Produce and...

Senior Backend Engineer (Platform & Cloud) Location: London (Hybrid) Contract: 6–12 months Rate: Negotiable (DOE) We’re working with a global enterprise organisation that is expanding a centralised engineering function supporting multiple product teams across an international portfolio. They’re looking for a Senior Backend Engineer to join a core platform team responsible for building shared services, libraries, and cloud-based functionality used across a wide range of internal products. This is a highly collaborative role, working directly with senior engineers and technical leaders across multiple time zones, helping shape the foundations of how teams build, scale, and reuse backend capability. The Role You’ll be part of a central engineering group building common functionality for distributed product teams. Early work will focus on: Abstracting existing codebases into shared Python libraries Developing data-driven solutions using PySpark and DataFrames Building and...

Software Developer 6-12 months London - Remote £600 per day inside IR35 - umbrella only Overview Our developers work within multidisciplinary Agile teams to deliver secure, robust, and user centred digital services. The role involves building high quality software, contributing to technical design, and continually improving codebases to meet service and safety requirements. Soft Skills & Behaviours: Clear and confident communicator, able to work with designers, product teams, testers, engineers, and external partners. Highly collaborative, supporting team success and contributing to shared goals. Positive, engaged, and proactive, bringing energy to team ceremonies and wider delivery activities. Comfortable with change, able to work through evolving requirements or priorities. Keen to learn and share knowledge, contributing to code reviews, pair?programming, and community?of?practice activities. Experienced working within Agile delivery, contributing to stand-ups,...

Senior Technical Data Solution Designer Location: London Paddington / Reading Green Park (Hybrid – 2 days onsite) Contract: 6 Months Rate: £465–£550 per day (Inside IR35) It Means More This opportunity offers more than just another contract role: * More ownership – Act as the senior technical authority within your data product squad, shaping end-to-end solution design. * More impact – Build trusted business layers and dashboards that directly influence strategic business decisions. * More technical depth – Work hands-on with modern tooling including dbt, SQL, GCP, Tableau and Atlan within a hybrid data mesh environment. The Role We are seeking a Senior Technical Data Solution Designer to join a large-scale enterprise data transformation programme within a complex, fast-paced environment. This is a pivotal, hands-on leadership role — the peak of the technical career pathway within the squad model. It is not a people management role, but a senior individual contributor...

Job Title: Senior Backend Engineer Location: Dunton Essex - 4 days minimum mandatory onsite Rate: £67.15ph Umbrella Co Basis (Inside IR35) Employment Type: Contract (31.12.26) Hours: Standard 37.5 Hours Per Week Reference: F56475 The Senior Backend Engineer plays a pivotal role in driving the technical success in our backend teams. This position involves architecting scalable, resilient, and secure backend solutions and overseeing the technical completion of critical development tasks, often in ambiguous situations. The Senior Backend Engineer is responsible for ensuring that backend code and architectural reviews are aligned with organisational goals, facilitating productive technical discussions, and making decisions to resolve complex backend engineering issues effectively. In this role, the Senior Backend Engineer supports the technical direction for backend development, offering guidance to team members and exemplifying technical excellence in backend practices....

Software Engineer – Back End – Java, Spring, GCP Contract: 9 Months (Renewable) Location: Essex (near Basildon and Brentwood) Office based 4 days a week Rate: £500 per day – Inside IR35 One of the world’s leading engineering companies and a household name is seeking a Software Engineer, Backend Engineer to play pivotal role in driving the technical success in our backend teams. Main Tasks & Responsibilities Software Engineer – Back End – Java, Spring, GCP > Architect scalable, resilient, and secure backend solutions and oversee the technical completion of critical development tasks, often in ambiguous situations. > Ensure backend code and architectural reviews are aligned with organisational goals, facilitating productive technical discussions, and making decisions to resolve complex backend engineering issues effectively. > Support the technical direction for backend development, offering guidance to team members and exemplifying technical excellence in...

Configuration Manager Stevenage 12 Month Initial Contract   Overview of department: Configuration Management is pivotal to success in developing and delivering engineered products to our customers and frontline users. Through the controlled application and compliance of processes, we give our programmes confidence and assurance in all products that we produce.   Description of the Role Experienced Configuration professional with an ability to provide technical support to the Configuration Management team. Your ability to build networks and foster strong relationships with the team to review, develop and deliver Configuration Management processes and procedures, as well as supporting and technically coaching project Configuration Managers to deliver technical excellence contributing towards the overall success of our business programmes.   What we’re looking for A proven track record of experience within engineering organisations or operational domains, with a strong technical...

World Class Defence Organisation is currently looking to recruit an Electrical Systems Engineer / Architect subcontractor on an initial 12 month contract. Your base site can either be from the companies Bristol, Stevenage or Bolton office.  This role will be a hybrid position – 3 days per week onsite and 2 days remote.      Hourly Rate: £60 - £85 (Umbrella).      Contract Duration: 6 Months initially and then ongoing and long-term thereafter.   Missile Electronic Architect Job Description:   Electrical Architects/Engineers are involved in all aspects of missile development, from the early concept studies to series production and in-service support. It’s an excellent opportunity for someone wanting to build on their engineering experience. Responsibilities: You will be responsible for the electrical architecture and requirements for missiles and/or their associated launcher systems with duties including: Specifying/determining system electrical requirements interface definitions...

World Class Defence Organisation is currently looking to recruit 5x Embedded Software V&V Engineer subcontractors on an initial 6 month contract.  Skills in C, C++ or ADA are beneficial.  A defence or aerospace industry background would also be great.   Rate: £70.00 per hour Location: Stevenage or Bristol, depending on your preference. Hybrid / Remote working: Full time on site (occasional work from home day) (The company are happy with a 4 day week) Contract: 37 Hours per week Overtime: Hours worked over 37 hours per week will be calculated at ‘time and a quarter’ Duration: 6 Months (initially and then ongoing and long-term thereafter) IR35 status: Inside IR35 (Umbrella) Interview process: 1 stage video interview   Embedded Software V&V Engineer Job Description:   The department create the complex, highly reliable real-time software that powers missile systems and their components, ensuring that they provide the performance and functionality our users require when they...

Configuration Engineer Stevenage – Hybrid Working 6 12 Month Plus Contract Working with a Globally known Manufacturing Company within the Defence industry. They are actively seeking a Configuration Engineer on a 6 - 12 month plus contract within the Stevenage area.   Responsibilities: The Senior Configuration Engineer is responsible for the Product definition and/or Configuration Management of a minor project or major parts of a project.  Skillset/experience required: Knowledge of Configuration Management and the application of these within and demanding yet professional engineering environment. The ability to build rapport with stakeholders as well as positively promote the Configuration Management group through supportive and pro-active approach with internal customers. Awareness of relevant internal and external customer requirements and standards. Reflection of engineering input, through the engineering change process, into the design definition / structure,...

World Class Defence Organisation based in Stevenage is currently looking to recruit an FPGA Design Engineer Subcontractor on an initial 6 month contract.   Rate: £90.00 per hour Overtime Rate: Hours worked over the standard 37 hours per week, will be paid at ‘time and a quarter’ Location: Stevenage Hybrid / Remote working: The role will be onsite Duration: 6 Months with very likely extension. Contracts are often ongoing and long-term thereafter.  IR35 status: Inside IR35 (Umbrella) Interview process: One stage video interview   FPGA Design Engineer Job Description:    For this role, we are seeking an experienced FPGA design and verification engineer (~4+ years), to support the development of our growing portfolio of complex FPGA projects. The current portfolio ranges from advanced signal processing systems (ImageRadio), core embedded processing systems, through to safety & security critical systems. Responsibilities: The role involves working at all phases of the FPGA...

Hiring: Java Software Engineer 📍 UK-Based | 🏠 Remote | 📅 12‑month contract | 450 per day I'm currently supporting the search for a highly capable Java Software Engineer looking to transition into Architecture to join a major transformation programme, leading the migration from on‑prem services into Azure. This isn't a junior role in experience - we're looking for someone with high-level architectural capability, strong communication skills, and the confidence to guide and oversee the work of experienced engineers. What You'll Be Doing 🔹 Supporting the Senior Architect across a large-scale cloud migration 🔹 Shaping data pipelines, data flows, and system-wide design 🔹 Providing architectural oversight to senior developers 🔹 Working across Java, Python and large data environments (design > coding) 🔹 Bringing a strong, assertive technical voice to ensure delivery stays on track What we're looking for: ✔ Strong Java engineering experience ✔ Exposure to cloud migration...

Contract Role - Security Architect Location: Hybrid - Wokingham or Warwick (1-2 days onsite per week) Contract: 6 Months (likely extension) IR35: Inside IR35 Security Clearance: Active SC Clearance Required Role Overview Our client is seeking an experienced Security Architect to support a major internal programme responsible for delivering capabilities that underpin critical infrastructure operations. This role will embed within an agile delivery programme while also contributing to the wider Security Architecture Community of Practice, working alongside enterprise and domain security architects to strengthen security architecture practices across the organisation. The successful candidate will provide security architecture leadership for an internal application within the programme, ensuring security is embedded throughout the development lifecycle using secure-by-design and shift-left principles. You will work closely with engineering, architecture, and delivery teams to...