16 contract systems engineer jobs found

Senior Front End Engineer/UX/UI Engineer - (Contract) Remote UK | 3-4 Days Per Week | Initial 3 months (Potential Extension) - £500 Per day Outside IR35 I'm working with an established organisation looking for a Senior Front End Engineer contractor to help modernise an enterprise SaaS application. Solid Front End development skills across JavaScript, jQuery, HTML and CSS/SCSS. You'll also have hands-on commercial experience using OpenAI Codex or similar AI coding agents within a development environment and any experience or exposure to ColdFusion/CFML is a bonus. This role goes beyond Front End engineering. We're looking for someone who combines strong development skills with genuine product UX/UI design experience. You should have experience designing user journeys, interaction patterns and scalable design systems, with a focus on creating intuitive user experiences as well as building them. The role will focus on improving an existing platform, building reusable...

Senior Network Engineer - 12 month Day Rate Contract (Outside IR35) Location: London (hybrid working of 3 days per week in the office) Duration: Initial 12 months The role will be responsible for designing and implementing solutions that compliment a dynamic, always growing and evolving global network for one of the leading organizations in financial services. Although the core focus of this role will be to act as a Network Engineer with a solid understanding of Network & IT Infrastructure Fundamentals including protocols, Switches, Routers/Firewalls, it will also include exposure to experience operating within Azure & AWS cloud tenants. You will design and manage the local and wide area networks of our organization to ensure maximum up time for our users. Key Responsibilities: - Develop secure, scalable, and highly available network architectures using technologies like VPNs, VPCs, virtual networks, and load balancers. - Provision, configure, and manage cloud-based...

Senior Java Engineer - Core Banking 6-month contract Fully Remote Outside IR35 £400 per day We are looking for a Senior Java Engineer to join a major Core Banking team delivering the development, modernisation and support of mission-critical banking services. You will work across several strategic initiatives, including core banking transformation, Legacy-system modernisation, regulatory enhancements and integrations between core banking platforms and surrounding services. This is a hands-on engineering position requiring strong Java expertise and recent experience delivering highly available systems within banking, payments or financial services. Key responsibilities Design, develop and maintain Java and Spring Boot services supporting core banking operations. Modernise Legacy banking applications into scalable microservices. Build APIs and event-driven integrations between core banking platforms, payment systems and third-party services. Develop services covering areas...

Senior Java Engineer - Contract Location: UK-based, Fully Remote Contract: 6 months initially Rate: Up to £500 per day IR35: Outside IR35 The Opportunity We're looking for an experienced Senior Java Engineer to join a major technology transformation and help build a brand-new greenfield iGaming platform for a global organisation generating over $1 billion in annual turnover . This is a genuinely exciting opportunity to join during a significant period of growth, with the wider engineering function being built out to 50+ engineers . You'll play a key role in designing and delivering a highly scalable, high-performance platform from the ground up. iGaming or betting platform experience is essential for this role. What You'll Be Doing Designing and developing high-quality, scalable Java applications and services. Contributing to the architecture and technical direction of a new greenfield iGaming platform. Working across the full software development life...

Initial 6 months - Outside IR35 Contract Rate: Up to £400/day Hybrid: 3-day onsite a week Security Operations Engineer | Microsoft Security Technologies | Contract Outside IR35 Hybrid: 3-day onsite (Bank Station) OR Liverpool office Rate: £350-£400/day (Outside IR35) Contract Duration: Initial 6 months with a potential extension Industry: Highly Regulated Environment Job Summary: Seeking for a Security Operations Engineer to join one of our highly regulated client on a contract basis. you'll be responsible for monitoring, detecting, investigating, and responding to security threats across Microsoft and hybrid environments. you'll play a key role in safeguarding critical business systems through proactive threat hunting, incident response, detection engineering, and operational support of core security programmes. Key responsibilities: Investigate and respond to escalated security incidents and events Perform event-based and policy-based threat...

Integration Engineer - Digital Health Location: Jersey / Hybrid Contract: September 2026 - January 2027 IR35: Outside IR35 Working Arrangement: Hybrid - regular on-site attendance in Jersey will be required I 'm supporting a large public-sector healthcare organisation in Jersey that is strengthening its Digital Health function with additional interim integration capability. The wider technology estate is supporting a number of critical digital programmes alongside significant operational demand and a backlog of technical work. The Integration Engineers will provide hands-on capability across the healthcare systems landscape, helping deliver new interfaces, improve interoperability and resolve existing integration challenges. This is a hands-on engineering role suited to somebody comfortable working across complex, multi-system environments rather than operating purely at architecture level. The Role: You will be responsible for:...

Back End Developer (Node.js) Senior Software Engineer Pricing & Inventory (Node/TypeScript) Contract: 6 months initially Rate: Up to £420 per day, Outside IR35 Location: Can be worked fully remote We re supporting a high-traffic global E-commerce platform in its search for a Senior Software Engineer to improve its pricing, inventory and availability systems. This is a hands-on role focused on building reliable, scalable services that process millions of customer searches across multiple international markets. What you'll be working on Building and improving pricing, inventory and availability services Developing quote-caching and data freshness strategies Designing resilient APIs and third-party integrations Reducing latency and improving platform performance Balancing pricing accuracy with cache efficiency and infrastructure cost Improving monitoring, tracing and production observability Owning solutions from investigation through to...

Senior Cloud Engineer - GCP/Kubernetes We are looking for a Senior Cloud Engineer to take ownership of the cloud infrastructure supporting a major new data platform. This is a hands-on contract role focused on GCP, Kubernetes, infrastructure as code, CI/CD and observability within secure, highly regulated environments. The Role You will desiHqagn, build and operate a distributed cloud platform spanning edge and central Kubernetes clusters. The environment uses a predominantly open-source technology stack, placing particular emphasis on networking, inter-cluster connectivity, platform security and deployment into restricted environments. You will work within an autonomous engineering team, establishing the infrastructure foundations that enable reliable and secure software delivery. Key responsibilities will include: Designing and operating secure, resilient infrastructure within Google Cloud. Building and managing production Kubernetes clusters using GKE. Supporting a...

Senior/Lead Software Engineer (Java) | Outside IR35 | Hybrid (2 Days Onsite in central London) Our client urgently seeks an experienced Senior Software Engineer with extensive Java expertise to take a lead role in the design,development and support of scalable, cloud-native Back End applications. Working within an Agile, DevOps environment, you'll help build high-performance microservices, APIs and event-driven solutions powering a next-generation platform used at significant scale. This is an exciting greenfield programme, working alongside engineers, operations and product teams to deliver software that supports critical business operations. Essential Experience Extensive commercial experience developing enterprise applications with Java and Spring Boot Proven track record designing and delivering high-throughput, distributed microservices at scale Strong experience building event-driven architectures using Kafka Expertise with PostgreSQL and Couchbase in...

Senior Software Engineer - Outside IR35 - Contract (Energy) About the role We are looking for a Senior Software Engineer (ideally with some Data Engineering experience) to join our client team in the energy trading sector. End date is not certain, but likely to be December 2026 or early Q1 2027. We are looking for experience in the following technologies: Microsoft Azure ecosystem Understanding of networking & security options in Microsoft Azure Infrastructure-as-code (preferably Bicep) Python Experience in the below would also be beneficial: Azure DevOps (pipelines) SQL We generally spend 2 days per week on-site with the client in central London (Monday & Thursday). £500-600 per day outside IR35 Start date: 10/08/2026 End date: December 2026 or early Q1 2027 About Softwire Softwire is a leading UK technology and strategy consultancy. From enterprise to government, we help visionary organisations turn...

Senior .Net Developer  My customer is looking for a Senior .Net Developer to join them on a 9 Month contract basis, Outside IR35 & working fully remote. AI assisted developement will need to be at the forefront of how you develop, operate, and process your workload and coding tasks.  As the succesfull Senior .Net Developer you'll be joining a greenfield build of a large scale platform. This isn't maintaining legacy code, it's building something new from scratch using modern patterns and AI-assisted development. The platform already has a working prototype but you'll be taking it into production. You'll be working across the full stack of backend services: building APIs, designing data models, implementing business logic engines, and making sure the platform scales. You'll need to be comfortable owning significant pieces of work with minimal hand-holding and making good technical decisions independently. Must Have Strong .NET / C# — this is your primary skill and it needs...

Cyber Security Contractor | Rate: £500.00 - £550.00p/d (Outside IR35) North Yorkshire Are you an experienced Cyber Security professional with a background in Defence or regulated industrial environments, looking for a hands-on contract where you can lead the security workstream on a genuinely high-profile project? Do you enjoy working across the full lifecycle, from threat modelling and risk assessment through to customer-facing assurance documentation? My client is an established manufacturer of precision technology, delivering solutions used across a range of regulated sectors including defence, energy, and industrial environments. They've built a strong reputation for reliability and operational integrity, with products used in demanding and safety-critical settings. Lead Cyber Security Delivery on a Live MOD Project This is a hands-on contract covering the full cyber-security workstream for a specialist monitoring and alarm system, delivered in line with the MOD Secure by...

Azure DevOps Engineer - Testing Background Rate: £500 per day IR35: Outside IR35 Location: Fully Remote Contract: Initial 3 months, with a strong possibility of extension Payment: Monthly We are looking for an Azure DevOps Engineer with a strong testing background to join an established technical team working on a large-scale Azure environment. This is not a pure DevOps role. The successful candidate will be responsible for Azure DevOps engineering alongside system testing, so previous experience in testing, QA, or test engineering is essential. You will work across Azure infrastructure, deployment pipelines, networking and application services, while also supporting system-level testing and ensuring applications and infrastructure operate as expected. Key Responsibilities Design, maintain and improve Azure DevOps pipelines and deployment processes. Work with Azure infrastructure and application services. Support system testing across applications...

Salary:  £55 - 58 per hour Reference:  18082026DF Cyber Security Contractor | Rate: £55.00 - £58.00p/h (Outside IR35) North Yorkshire Are you an experienced Cyber Security professional with a background in Defence or regulated industrial environments, looking for a hands-on contract where you can lead the security workstream on a genuinely high-profile project? Do you enjoy working across the full lifecycle, from threat modelling and risk assessment through to customer-facing assurance documentation? My client is an established manufacturer of precision technology, delivering solutions used across a range of regulated sectors including defence, energy, and industrial environments. They've built a strong reputation for reliability and operational integrity, with products used in demanding and safety-critical settings. Lead Cyber Security Delivery on a Live MOD Project This is a hands-on contract covering the full cyber-security...

Salary: £55 - 58 per hour Reference: 18082026DF Cyber Security Contractor | Rate: £55.00 - £58.00p/h (Outside IR35) North Yorkshire Are you an experienced Cyber Security professional with a background in Defence or regulated industrial environments, looking for a hands-on contract where you can lead the security workstream on a genuinely high-profile project? Do you enjoy working across the full lifecycle, from threat modelling and risk assessment through to customer-facing assurance documentation? My client is an established manufacturer of precision technology, delivering solutions used across a range of regulated sectors including defence, energy, and industrial environments. They've built a strong reputation for reliability and operational integrity, with products used in demanding and safety-critical settings. Lead Cyber Security Delivery on a Live MOD Project This is a hands-on contract covering the full cyber-security...

Senior Data Migration Engineer - SAP London Based - Onsite 1 day per week, mostly remote after the first month 6 month contract Outside of IR35 £410.00 We are seeking experienced Data Migration Analysts to support a large-scale global transformation programme that is replacing core ERP and Middle Office platforms across a substantial multi-site UK operation. Data migration is critical to the success of the programme, and you'll play a key role in preparing high-quality data for pilot go-live and subsequent deployment phases. This is an exciting opportunity to join a high-profile transformation initiative and take ownership of hands-on data migration activities, enabling operational teams to focus on subject matter expertise and business validation. What You'll Be Doing As a Data Migration Analyst, you'll be responsible for executing the end-to-end data preparation process across multiple data domains, ensuring data is mapped, cleansed and ready for migration....