49 system engineer jobs found

Contract Software Engineer (Java/Microservices/Azure/SQL) - HealthTech - Outside IR35 - £500-£550pd - Fully Remote - 6 months Are you an experienced Backend Software Engineer looking for your next outside IR35 contract ? My client, an innovative HealthTech company , is seeking a talented Java Engineer to join their platform team on a fully remote, 6-month contract . Role Overview: You'll play a key role in enhancing and integrating core Back End services that power a modern healthcare platform. The focus will be on Java-based microservices , API integrations , and Azure cloud infrastructure , ensuring a robust and scalable system that supports critical healthcare operations. Key Skills & Experience: Strong commercial experience with Java (8+) and microservices architecture Proven background in API and platform integration Solid understanding of Azure (Functions, App Services, Service Bus, etc.) Expertise in SQL and database performance tuning...

Principal AI / Data Engineer (Contract): Length:  3 months initally (extension is likely)  Start Date:  ASAP  Location:  London, Hybrid (1 day per week)  Pay Rate / Determination: £525-575 p/d | Outside IR35  About:  Opus is supporting a UK-based digital consultancy partnering with organisations to design, build and scale high‑impact digital and AI‑driven products, with a strong people‑first culture. The role:  A hands‑on Principal AI / Data Engineer contract to assess, shape and deliver improvements to a live AI platform across two critical workstreams. You'll be responsible for: Assessing the current AI and data platform and define clear, actionable improvements Lead on delivery across two workstreams, aligning product, data and engineering Improving the natural language data exploration platform, focusing on trust and semantic consistency Designing and implementing scalable, multi‑source data pipelines and architecture About you: Strong experience with...

AI Product Developer | £400 - £500 We're working with a high-velocity enterprise AI innovation foundry on this exciting opportunity. They are at the forefront of engineering intelligent ecosystems that transform how modern enterprises operate through cutting-edge Generative AI. This is a high-octane role for a GenAI specialist to build production-ready Copilots and LLM applications from the ground up. You will leverage Azure AI, RAG architectures, and advanced vector databases to deploy scalable, secure-by-design AI agents that solve complex business challenges at scale. The Role Architect and deploy sophisticated LLM-powered applications and AI agents using Azure OpenAI and LangChain frameworks. Engineer high-performance RAG pipelines, optimizing embeddings and vector search capabilities for maximum accuracy. Build and integrate custom Copilot solutions and prompt libraries into existing enterprise system architectures via secure APIs. Establish robust AI...

Principal AI/Data Engineer (Contract): Length: 3 months initially (extension is likely) Start Date: ASAP Location: London, Hybrid (1 day per week) Pay Rate/Determination: £525-575 p/d | Outside IR35 About: Opus is supporting a UK-based digital consultancy partnering with organisations to design, build and scale high impact digital and AI driven products, with a strong people first culture. The role: A hands on Principal AI/Data Engineer contract to assess, shape and deliver improvements to a live AI platform across two critical workstreams. You'll be responsible for: Assessing the current AI and data platform and define clear, actionable improvements Lead on delivery across two workstreams, aligning product, data and engineering Improving the natural language data exploration platform, focusing on trust and semantic consistency Designing and implementing scalable, multi source data pipelines and architecture About you: Strong experience with...

Data Migration Engineer - Outside IR35 - Remote Overview We are seeking an experienced Data Migration Analyst/Engineer to support a major data warehouse rebuild for a wealth management firm undergoing a large-scale system and data migration programme. Working closely with the Lead Data Engineer, this role will play a critical part in ensuring the new data warehouse accurately replicates existing outputs, while identifying and resolving any data gaps introduced during migration. This is a hands-on role requiring strong analytical capability, deep SQL expertise, and experience working in complex, regulated data environments. Key Responsibilities Perform source-to-target mapping , documenting field-level lineage across systems and transformation layers Analyse and interpret complex Legacy SQL stored procedures (including multi-CTE logic, temp tables, and parameterised pipelines) Support data migration validation , ensuring accuracy and completeness of migrated datasets...

AI Product Developer | £400 - £500 We're working with a high-velocity enterprise AI innovation foundry on this exciting opportunity. They are at the forefront of engineering intelligent ecosystems that transform how modern enterprises operate through cutting-edge Generative AI. This is a high-octane role for a GenAI specialist to build production-ready Copilots and LLM applications from the ground up. You will leverage Azure AI, RAG architectures, and advanced vector databases to deploy scalable, secure-by-design AI agents that solve complex business challenges at scale. The Role Architect and deploy sophisticated LLM-powered applications and AI agents using Azure OpenAI and LangChain frameworks. Engineer high-performance RAG pipelines, optimizing embeddings and vector search capabilities for maximum accuracy. Build and integrate custom Copilot solutions and prompt libraries into existing enterprise system architectures via secure APIs. Establish robust AI...

SC Cleared VMware vSphere Engineer (Outside IR35 | 3 Month) Location: 5 days onsite: Corsham / Portsmouth (Onsite) Rate: £450-£500 per day (Outside IR35) Contract: Short-Term - 3 Month Overview We’re looking for an SC Cleared VMware vSphere Engineer to support a critical, short-term requirement within a live operational environment. You’ll be joining an established support function responsible for maintaining and stabilising legacy VMware infrastructure. Key Responsibilities Provide hands-on support across VMware vSphere 6.7 environments Work within a live system, ensuring minimal disruption to services Support incident management, troubleshooting, and resolution Collaborate closely with an existing support/resolver team Contribute to system stability and ongoing operational performance Essential Experience Strong experience with VMware vSphere (version 6.7) Active SC Clearance (mandatory) Background in live operational/support...

Senior Data Engineer — Contract UK Based | £500/day | Remote | Outside IR35 We're hiring a Senior Data Engineer on a 3-month contract to join an AI and Automation team inside a UK unicorn. The work is clearly scoped, the roadmap is planned, and they need someone who can hit the ground running from day one. What you'll do Build and integrate data tables that propagate learner status updates across a live tech stack, with data flowing in real time to an external provider's API Fix a permissions management system currently reliant on manual query execution and resolve API latency issues affecting an internal tool Expand a DataOps API to reduce direct SQL dependency across internal systems Support a data migration and build out additional tables with the right endpoints Improve pipeline performance and connection stability under growing user load Who you are An experienced contractor, active within the last 12 months Strong background in real-time...

Working Model: Onsite – 5 days per week/ Some hybrid work may be available Location: Corsham (advertised location due to portal limitation) Actual requirement includes Portsmouth and/or Corsham (on-site) Contract Length: Short-Term Contract Security Clearance: Active SC required (mandatory) Rate: £500.00-£550.00 IR35 Status: Outside IR35 Overview We are seeking experienced SC-cleared VMware vSphere engineers to support an urgent, short-term requirement within a live operational environment. This role involves augmenting an existing support team managing legacy VMware infrastructure. Clearance Due to the secure nature of the programme, candidates must hold active UK Security Clearance (SC) clearance . Key Responsibilities Provide hands-on support for VMware vSphere 6.7 environments Work within a live/operational system with minimal disruption Assist with incident resolution and system stability Collaborate with an existing...

Contract Opportunity: AI Engineer (GenAI) Fully Remote (UK-based) Outside IR35 - £550 - £600 p/d DOE Start Date: 19th May Contract Length: 6 months (Full time) We're looking for a skilled Python engineer to support a 10-week GenAI project. You’ll be working with LLMs, agentic frameworks, and modern backend tools in a remote, collaborative setup. What you'll need: Strong Python engineering background (AI/ML or backend) Experience building with LLMs (LangChain, LlamaIndex, or LangGraph) Familiar with vector databases for embedding/indexing with images, audio, text and video Familiar with different multi-agent system patterns Comfortable with FastAPI or Flask Strong cloud experience (GCP or AWS) Nice to have: GCP experience Background in ML projects Experience working on data-heavy applications Familiarity with CI/CD pipelines If you're available from 19th May and interested in a short-term, high-impact GenAI project. Get in touch if...

AI Product Developer | £400 - £500 We're working with a high-velocity enterprise AI innovation foundry on this exciting opportunity. They are at the forefront of engineering intelligent ecosystems that transform how modern enterprises operate through cutting-edge Generative AI. This is a high-octane role for a GenAI specialist to build production-ready Copilots and LLM applications from the ground up. You will leverage Azure AI, RAG architectures, and advanced vector databases to deploy scalable, secure-by-design AI agents that solve complex business challenges at scale. The Role Architect and deploy sophisticated LLM-powered applications and AI agents using Azure OpenAI and LangChain frameworks. Engineer high-performance RAG pipelines, optimizing embeddings and vector search capabilities for maximum accuracy. Build and integrate custom Copilot solutions and prompt libraries into existing enterprise system architectures via secure APIs. Establish robust AI...

🔥 Contract Lead JavaScript Developer 📜 Outside IR35 💸 £500p/d 🏡 Fully Remote (UK) ⏳ 12 Months Opus is partnered with an early‑stage start‑up embarking on a true 0→1 platform build . They’re looking for a Contract Lead JavaScript Developer to take ownership of the architecture, define the tech stack, and build a high‑performing engineering team from the ground up. This is a hands‑on technical leadership role where you’ll shape the platform, influence product direction, and be central to discovery through to delivery. If you thrive in ambiguity, enjoy greenfield builds, and want genuine ownership — this one’s for you 🚀 🔍 What You’ll Be Doing Leading a full 0–1 build for a start‑up platform Defining and owning the JavaScript-based tech stack Architecting a scalable, cloud‑native system Hands‑on development across frontend & backend Playing a key role in the discovery phase , shaping technical decisions Driving best practices...

Lead Integration Architect 12 Months Contract Outside IR35 £600 to £650 a day 3 days a week in Dartford Kent A global powerhouse in the Infrastructure and Built Environment sector is urgently seeking a visionary Integration Architect to spearhead the connectivity for a multi-million-pound Digital Manufacturing Cloud (DMC) transformation. This isn't a maintenance role. You will own the entire integration architecture, acting as the master orchestrator for a complex ecosystem. You will ensure that high-level ERP and HR systems communicate perfectly with the precision-engineered data flows of PLM, MES, and QMS platforms. As an integration Architect you will have the following responsibilities Define the integration architecture that allows disparate enterprise systems to speak a single, fluent language. Manage APIs, interfaces, and complex data streams to ensure seamless, real-time interoperability. Act as the guardian of architectural integrity across all...

🔥  Contract Lead JavaScript Developer 📜  Outside IR35 💸  £500–£550p/d 🏡  Fully Remote (UK) ⏳  12 Months Opus is partnered with an  early‑stage start‑up  embarking on a true  0→1 platform build . They’re looking for a  Contract Lead JavaScript Developer  to take ownership of the architecture, define the tech stack, and build a high‑performing engineering team from the ground up. This is a hands‑on  technical leadership role  where you’ll shape the platform, influence product direction, and be central to discovery through to delivery. If you thrive in ambiguity, enjoy greenfield builds, and want genuine ownership — this one’s for you 🚀 🔍  What You’ll Be Doing Leading a full  0–1 build  for a start‑up platform Defining and owning the  JavaScript-based tech stack Architecting a scalable, cloud‑native system Hands‑on development across frontend & backend Playing a key role in the  discovery phase , shaping technical decisions Driving best practices around...

Databricks. Azure. Cloud Migration. PySpark. Lakehouse. Teradata Modernisation We're building a bench of top-tier Databricks and Cloud Data Engineering contractors for a series of high-impact transformation programmes across multiple UK clients. If you specialise in cloud migration, Databricks engineering, and modern data platform builds , there are several projects kicking off now and over the coming weeks. These are hands-on, delivery-focused roles where you'll be shaping modern data platforms, migrating Legacy estates, and building scalable engineering foundations that actually get used; not just documented. What You'll Be Working On Depending on the project, you'll be involved in: Migrating enterprise data workloads from Teradata and other Legacy systems into Databricks on Azure Designing and building high-performance PySpark pipelines , Delta Lake tables, and medallion architectures Developing scalable ETL/ELT workflows and optimising existing...

Contract Lead JavaScript Developer Outside IR35 £500-£550p/d Fully Remote (UK) 12 Months Opus is partnered with an early stage start up embarking on a true 0 1 platform build . They're looking for a Contract Lead JavaScript Developer to take ownership of the architecture, define the tech stack, and build a high performing engineering team from the ground up. This is a hands on technical leadership role where you'll shape the platform, influence product direction, and be central to discovery through to delivery. If you thrive in ambiguity, enjoy greenfield builds, and want genuine ownership - this one's for you What You'll Be Doing Leading a full 0-1 build for a start up platform Defining and owning the JavaScript-based tech stack Architecting a scalable, cloud native system Hands on development across Front End & Back End Playing a key role in the discovery phase , shaping technical decisions Driving best practices around architecture,...

Platform Engineer - Outside IR35 - Remote - 6 months You will be an integral member of Squad A, working alongside the Senior Platform Engineer to deliver and maintain the integration layer that connects BSS/OSS systems. Mid-transformation - moving from vendor-managed, outsourced integration to a fully in-house engineering capability - and your contributions will matter from day one. The integrations you build and maintain are what connect Salesforce Communications Cloud to billing systems, provisioning pipelines, the NetAdmin network configuration platform, and ultimately to the customers getting connected across the UK. Must Have Skills Experience Minimum 18 months of hands-on integration or API development experience in a professional delivery environment - working on real platform implementations with production consequence, not solely academic or training exercises Solid REST API fundamentals - HTTP methods, status codes, JSON/XML payload structures - with...

Senior Platform Engineer - Remote - Outside IR35 - 6 months As Senior Platform Engineer (Integration) in Squad A, you will be the in-house technical authority for all API and integration work across critical BSS/OSS ecosystem. You will own the build, maintenance, and evolution of integration flows connecting Salesforce Communications Cloud, NetAdmin, Nokia/Adtran, billing systems, and new services provisioning pipelines - bringing rigour, repeatability, and platform ownership to an environment that has historically relied on external managed services. This is not a Back Office development role. You will be a senior contributor to the CI/CD pipeline, a guardian of integration quality across squad boundaries, working closely with the Head of OSS/BSS, the Software Solutions Architect, and cross-squad peers to establish the internal integration capability Experience Must Have Skills Minimum 3 years of hands-on API and integration development experience in a...

Lead Integration Architect 12 Months Contract Outside IR35 £600 to £650 a day 3 days a week in Dartford Kent A global Powerhouse in the Infrastructure and Built Environment sector is urgently seeking a visionary Integration Architect to spearhead the connectivity for a multi-million-pound Digital Manufacturing Cloud (DMC) transformation. This isn't a maintenance role. You will own the entire integration architecture, acting as the master orchestrator for a complex ecosystem. You will ensure that high-level ERP and HR systems communicate perfectly with the precision-engineered data flows of PLM, MES, and QMS platforms. As an integration Architect you will have the following responsibilities Define the integration architecture that allows disparate enterprise systems to speak a single, fluent language. Manage APIs, interfaces, and complex data streams to ensure seamless, Real Time interoperability. Act as the guardian of architectural integrity across all system...

JOB DETAILS - £500-£550 PER DAY - OUTSIDE IR35 - 12-MONTH CONTRACT - REMOTE ROLE WITH OCCASIONAL ON-SITE IN SOUTH WALES SKILLS - Experience working on SCADA projects. - Strong skills in Linux and Windows. - Knowledge of different encryption methods. - Understanding of Kerberos. - Prior experience working in Active Directory (AD) projects. RESPONSIBILITIES - Support SCADA upgrade programme and delivery of application upgrades across SCADA install base. - Managing enhanced privileged access management to SCADA. - Knowledge of onboarding legacy systems into Active Directory (AD). - Supporting Kerberos rollout. 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 your career. Hays Specialist Recruitment Limited acts as an employment agency for permanent...