17 senior java engineer jobs found

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...

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...

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...

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 backend 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/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 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 - 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 Software Engineer - Rust & Python - any Ruby OR Java a bonus. 100% remote. £600-£650/day OUTSIDE IR35. 12 MONTH CONTRACT We are seeking an experienced Software Engineer to help build and evolve Back End services. You will also play a key role in modernising our engineering ecosystem by helping decommission Legacy Rails components, migrating data models into modern services, and establishing new sources of truth across CLIENTS platform. KEY SKILLS ARE RUST, PYTHON & ANY RUBY, JAVA & API's A BONUS! This is a hands-on engineering role requiring deep expertise with Rust & Python and have experience to build high-performance, scalable Back End systems. YOU MUST BE AN EXPERT IN RUST & PYTHON. Any API's (REST OR GRAPHGL) & Ruby On Rails OR JAVA a big bonus but not essential. Key Deliverables Build and enhance Back End services that reduce operational costs through automation and process optimisation. Develop scalable Rust & Python-based services...

Senior DevOps & Platform Automation Engineer - Outside IR35 Contract - Hybrid - London Driving Agentic AI, Ephemeral Infrastructure & Next-Generation Delivery We're seeking an experienced DevOps and Platform Automation professional to play a key role in shaping the future of engineering delivery within a rapidly evolving technology function. Working closely with the DevOps & Automation leadership team, you'll help accelerate a strategic transformation focused on intelligent automation, cloud-native engineering, self-service platforms and ephemeral environments. This role is ideal for someone who thrives on innovation, enjoys solving complex challenges at scale, and wants to influence how modern software delivery is implemented across an enterprise organisation. You'll be instrumental in advancing capabilities across platform engineering, deployment automation, observability, AI-driven operations and Infrastructure as Code, helping move the organisation toward...

Technical Lead 6-Month Contract | (Outside IR35) £500 day rate / Hybrid (Edinburgh / Glasgow) Parity Network is recruiting on behalf of a public sector organisation seeking an experienced Technical Lead for an initial 6-month contract. This is a hybrid role, with team collaboration taking place in Edinburgh or Glasgow as required. About the Role As an experienced Technical Lead / Senior Software Engineer you will join an agile development team working within the Housing Management Registers domain. This is a hands-on technical leadership role requiring strong commercial experience with Java, Spring Boot and OpenShift. You will lead technical solutions, support architectural decision-making and help ensure the development team delivers secure, scalable and maintainable digital services. You will also act as a link between the development team and architecture stakeholders, helping to establish best practices, technical standards and engineering principles. Key Responsibilities...

Senior Data Engineer London | Fleixble, hybrid working pattern | Outside IR35 | 12 month engagement We're looking for a Senior Data Engineer who understands that great data engineering is about building reliable, scalable data products, not simply moving data from A to B. This is an opportunity to shape modern data platforms, solve complex engineering challenges, and deliver data solutions that create genuine business value. You'll join an organisation investing heavily in its data capabilities, working alongside architects, analysts, data scientists, and engineering teams to build robust, production-grade data platforms that support analytics, AI, and operational decision-making. Why join Work on large-scale data and cloud transformation initiatives Influence architecture, engineering standards, and platform strategy Deliver solutions that have measurable business impact Join a collaborative team of experienced data professionals Responsibilities...

Technical Lead 6-Month Contract | (Outside IR35) £500 day rate / Hybrid (Edinburgh / Glasgow) Parity Network is recruiting on behalf of a public sector organisation seeking an experienced Technical Lead for an initial 6-month contract. This is a hybrid role, with team collaboration taking place in Edinburgh or Glasgow as required. About the Role As an experienced Technical Lead / Senior Software Engineer you will join an agile development team working within the Housing Management Registers domain. This is a hands-on technical leadership role requiring strong commercial experience with Java, Spring Boot and OpenShift. You will lead technical solutions, support architectural decision-making and help ensure the development team delivers secure, scalable and maintainable digital services. You will also act as a link between the development team and architecture stakeholders, helping to establish best practices, technical standards and engineering principles. Key...

Technical Lead 6-Month Contract | (Outside IR35) £500 day rate/Hybrid (Edinburgh/Glasgow) Parity Network is recruiting on behalf of a public sector organisation seeking an experienced Technical Lead for an initial 6-month contract . This is a hybrid role, with team collaboration taking place in Edinburgh or Glasgow as required. About the Role As an experienced Technical Lead/Senior Software Engineer you will join an agile development team working within the Housing Management Registers domain. This is a hands-on technical leadership role requiring strong commercial experience with Java, Spring Boot and OpenShift . You will lead technical solutions, support architectural decision-making and help ensure the development team delivers secure, scalable and maintainable digital services. You will also act as a link between the development team and architecture stakeholders, helping to establish best practices, technical standards and engineering principles. Key...

Senior Backend Rust Engineers Outside IR35 Fully Remote I'm looking for 2 Senior Backend Rust Engineers to join a major, long-term platform transformation programme. This isn't a short-term "come in and fix a few bugs" contract. The team are rebuilding and modernising a business-critical platform, there's a significant roadmap of engineering work ahead, and I'm looking for experienced engineers who want something they can properly get their teeth into. You'll be working hands-on across: • Rust • Backend services & APIs • Distributed systems • Cloud-native development • SQL & NoSQL databases • Modern AI-assisted software engineering I'm not looking for architects who have moved away from coding. I'm looking for experienced software engineers who still enjoy getting into the detail, solving difficult technical problems and building production systems. You don't need to have spent your entire career working exclusively with Rust either. A strong wider backend...

Technical Lead - 6 Months - Outside IR35 - Edinburgh (Hybrid) Day Rate - Circa £540 Harvey Nash's public sector client are currently looking to recruit a Technical Lead to join their team based remotely for an initial 6 month period. software engineer with solid commercial experience of building containerised Spring Boot Java applications running on OpenShift is required to provide hands-on technical leadership to an agile development team. Ensuring alignment with strategic architectural direction and acting as a conduit between the development team and the Architecture Steering Group, helping to define and refine best practices, standards and architectural principles. Main Duties: Support the continued rollout of the Property Factors Meet accessibility standards and remain compliant as they evolve Improve operational efficiency for administrative users Enhance citizen interactions Comply with data protection legislation Provide effective support and maintenance of...

Senior Backend Rust Engineers | Outside IR35 | Fully Remote I'm looking for 2 Senior Backend Rust Engineers to join a major, long-term platform transformation programme. This isn't a short-term "come in and fix a few bugs" contract. The team are rebuilding and modernising a business-critical platform, there's a significant roadmap of engineering work ahead, and I'm looking for experienced engineers who want something they can properly get their teeth into. You'll be working hands-on across: • Rust • Backend services & APIs • Distributed systems • Cloud-native development • SQL & NoSQL databases • Modern AI-assisted software engineering I'm not looking for architects who have moved away from coding. I'm looking for experienced software engineers who still enjoy getting into the detail, solving difficult technical problems and building production systems. You don't need to have spent your entire career working exclusively with Rust either. A strong wider Back End...

Technical Lead - 6 months - Outside IR35 - Edinburgh (Hybrid) Day Rate - Circa £540 Harvey Nash's public sector client are currently looking to recruit a Technical Lead to join their team based remotely for an initial 6 month period. software engineer with solid commercial experience of building containerised Spring Boot Java applications running on OpenShift is required to provide hands-on technical leadership to an agile development team. Ensuring alignment with strategic architectural direction and acting as a conduit between the development team and the Architecture Steering Group, helping to define and refine best practices, standards and architectural principles. Main Duties: Support the continued rollout of the Property Factors Meet accessibility standards and remain compliant as they evolve Improve operational efficiency for administrative users Enhance citizen interactions Comply with data protection legislation Provide effective support and maintenance of...