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        1 API job in United States + 20 miles

        Senior Backend Engineer

        Plexus Resource Solutions Ltd
        United States
        From £190,000 to £240,000 per annum
        $190k - $240k - Fully Remote - San Francisco, USA - RAISED OVER $100 MILLION!!! Plexus has another great opportunity in the Web3 space. The company is creating entertainment that empowers on the blockchain. Powered by talent from around the globe, they believe in making bold moves to create products that have never been seen in the marketplace. They are looking for a Senior Backend Engineer to join their DEX team to design, built and scale the services that power decentralized trading. * Architect and Build DEX services with a focus on throughput, determinism, and fault isolation. * Design APIs (REST/WebSocket) and data models that are explicit , versioned, and easy to integrate. * Integrate on-chain logic with their blockchain. * Performance and Reliability. * Security and Compliance by Design. * Observability: Define golden signals, metrics, tracing and error budget
        $190k - $240k - Fully Remote - San Francisco, USA - RAISED OVER $100 MILLION!!! Plexus has another great opportunity in the Web3 space. The company is creating entertainment that empowers on the blockchain. Powered by talent from around the globe, they believe in making bold moves to create products that have never been seen in the marketplace. They are looking for a Senior Backend Engineer to join their DEX team to design, built and scale the services that power decentralized trading. * Architect and Build DEX services with a focus on throughput, determinism, and fault isolation. * Design APIs (REST/WebSocket) and data models that are explicit , versioned, and easy to integrate. * Integrate on-chain logic with their blockchain. * Performance and Reliability. * Security and Compliance by Design. * Observability: Define golden signals, metrics, tracing and error budget
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        NEW

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        They are looking for a Principal Software Engineer to help shape the future of digital services. * Setting the technical direction of software engineering and helping to define best practice. * Strong software engineering expertise, ideally with JavaScript (React preferred) and knowledge of cloud platforms (AWS, Azure, Cloudflare). Salary: £65,000 - £75,000 - Location: UK-based - iO Associates is supporting a large public-sector organisation. You'll join a forward-thinking Head of Engineering who is transforming the team to deliver smarter, more efficient solutions for residents and staff. What you'll be doing * Taking a hands-on role in solution design and development. * Collaborating closely with platform engineering to create robust, scalable services. * Building new tools internally to improve access to services,
        They are looking for a Principal Software Engineer to help shape the future of digital services. * Setting the technical direction of software engineering and helping to define best practice. * Strong software engineering expertise, ideally with JavaScript (React preferred) and knowledge of cloud platforms (AWS, Azure, Cloudflare). Salary: £65,000 - £75,000 - Location: UK-based - iO Associates is supporting a large public-sector organisation. You'll join a forward-thinking Head of Engineering who is transforming the team to deliver smarter, more efficient solutions for residents and staff. What you'll be doing * Taking a hands-on role in solution design and development. * Collaborating closely with platform engineering to create robust, scalable services. * Building new tools internally to improve access to services,
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        An innovative, mission-driven LegalTech SaaS start-up is looking for a Senior Product Engineer (Backend & Data) with deep experience in Python, Product development, and Data engineering. Founding Engineer | Python | GCP | Terraform | Event-Based Systems | Data Pipelines - They want engineers to be setup to stay on top in the new AI world. Your mission: own, build, and scale version 1 - the first commercial-ready Product to go to market. * Salary: Up to £100,000 (DOE) + Equity * Location: Fully remote (UK only) * Stack:Python, TypeScript, GCP, Pub/Sub, SQL & NoSQL, IaC (Terraform), CI/CD (GitHub Actions), Observability tools, AI tooling - Youll join a remote first, high-trust engineering team working with a modern, cloud-native stack - with real influence over technical decisions from day one. Youll ta
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        A newly established venture, backed by leading names in management consulting and global investment, is seeking outstanding Software Developers to join its growing team in the heart of Newcastle City Centre. Developers here are trusted to take ownership, work at pace, and tackle intellectually stimulating challenges while collaborating closely with colleagues and clients. * Ability to manage full lifecycle software development projects from inception to delivery £100,000 GBP - Onsite WORKING - Location: Newcastle Upon Tyne, North East - United Kingdom Type: Permanent - This is a unique opportunity to be part of an exciting new business from the ground up, helping to shape the culture, drive innovation, and deliver cutting-edge solutions to complex business challenges. Why Join - The organisation pride
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        They are building a team of exceptional developers in the heart of Newcastle City Centre, creating an intellectually stimulating environment where world-class technical talent can work on complex, high-impact initiatives tied to global markets and events. If you're an outstanding developer and communicator who thrives on solving challenging problems at pace, this is a rare opportunity to join a business at its inception and help shape its culture and future. ££110,000 - £130,000 GBP - Onsite WORKING - Location: Newcastle Upon Tyne, North East - United Kingdom Type: Permanent - Up to £130,000 + Excellent Benefits - Our client is a newly established joint venture between a global leader in management consulting and a leading global alternative investment fund manager. What You'll Be Doing * Take ownership of technical products and proje
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        Android Wi-FI AOSP Engineer

        Henderson Scott
        CA - California, 94 128
        US$160000.00 - US$200000.00 per annum + + Excellent benefits
        We're looking for an elite Android Wi-Fi & AOSP Engineer to own and evolve the core system features that keep media streaming and wireless connectivity buttery-smooth across embedded Android devices. * AOSP Wi-Fi Innovation: Build, customize, and enhance the Android Wi-Fi stack & middleware (above driver level) for cutting-edge embedded devices. * Driver & Chipset Collaboration: Partner with low-level engineers to integrate & debug with Qualcomm, Broadcom, and other leading Wi-Fi chipsets. * 10+ years of Android development, with deep AOSP and Wi-Fi stack expertise. * Mastery in debugging Android's Wi-Fi framework & middleware. * Proven success optimizing Android for real-time or media-intensive workloads. Apply now and help us push t
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        Senior Backend Engineer

        Ncounter LTD
        W1, Central London
        From £120,000 to £160,000 per annum Equity and package
        Product-Focused Backend Engineer Functional Programming & Distributed Systems - As a Backend Engineer, youll join a growing team working at the forefront of AI infrastructure. * Proven track record of building and scaling distributed backend systems - London (Hybrid) | £120,000£160,000 + Equity - At Ncounter, were partnering with a cutting-edge AI company on a mission to redefine how professionals in highly regulated industries interact with complex, multi-modal data. Their platform empowers users to deploy custom no-code AI agents that produce verifiable outputs with full transparency - ensuring trust, compliance, and control remain central to every decision. This isnt just about clean code or strong delivery - its about ownership, product intuition, and building for scale. Youll be
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        Team Lead Java Developer

        TEKsystems
        Manchester, Greater Manchester
        80000.00 - 100000.00 GBP/Salary + Pension, Holidays, Bonus.
        Our global, market leading client is looking to recruit Team Lead Java Developers. Job Title: Team Lead Java Developer Java Software Engineering Team Leads in Greater Manchester- Hybrid role 2 days per week in the office. Technical Leadership & Consulting/Advisory/Traning skills are a must as well as versed in Java, Microservices, Kafke, AWS, React and Angular, CI/CD & * Team management, advisory and training skills. Description - Terraform. Has the history to drive engineering standards, mentor, pair programmes and bring outside in view. Essential Skills Required; * Javascript * Microservices * Kafke * Aws * React * Angular * CI/CD - Location: Manchester, UK - Rate/Salary: 80000.00 - 100000.00 GBP Yearly - Job Type: Contract to Hire - Trading as TEKs
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        Our client is seeking a talented and motivated Senior Software Engineer to lead the development of our next-generation observability platform. Are you a seasoned software engineer with a passion for designing and developing cloud-native Infrastructure-as-Code (IaC) solutions from the ground up? * Collaborate within a dynamic software engineering team to architect and build a new cloud-native IaC platform. * Develop software using technologies such as Docker Compose, Terraform, Kubernetes (K8s), Python, and Go. * A software developer experienced in designing and delivering complex IaC capabilities from scratch, not merely operating existing environments. * A background in developing cloud-native systems software within SaaS organisations. * Demonstrate
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        Senior Java Developer - Credit, E-Trading, Algo sought by leading investment bank based in the city of London. * Extensive hands-on coding in server-side Java with strong emphasis on Java Concurrency, RX Streams, Caching (GridGain as Cache), Collections API, Messaging and Event processing across multiple streams * Overall 7+ Years of Java dev Experience **Inside IR35 - 4 days on site** * Project work also includes enhancements to the auto-quoting and algo framework for pricing, offering, and quoting. * Will specifically focus on engagement, framework design and development of deliverables for Credit Cash electronic trading. * Understand business requirements and propose design and code changes. * Participate in peer-to-peer code and design reviews * Build and support QA * Resolve and have keen focus o
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        It's an ideal role for a driven Lead Engineer who thrives in ambitious environments and wants to make a tangible impact. As a Lead Backend Engineer, you'll take ownership of designing and scaling cloud-native backend systems. * Lead architectural discussions with a focus on performance, scalability, and reliability. * Deliver complex features end-to-end - from design through deployment and monitoring. Location: London - 1x a month - Salary: Up to £120,000 (D.O.E) + benefits - Fruition Group are partnering with a high-growth Insurtech unicorn that's scaling its engineering function. This is a unique chance to work across both proven, revenue-generating products and greenfield initiatives that are reshaping the future of insurance. You'll work primarily with Python (FastAPI) and play a
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        Principal Software Engineer (Java/Python)

        Rise Technical Recruitment Limited
        London
        £90000.00 - £95000.00 per annum + Progression + Pension
        The ideal candidate is a hands-on Software Engineer with strong experience in Java and Python, confident working with AWS cloud infrastructure including containerisation (Docker/Kubernetes), architecture, and scaling systems. *Experienced Hands-on Software Developer with strong Java and Python experience - Technical Lead (Java/Python) An excellent opportunity awaits an experienced Developer with strong Python and Java experience join an exciting SaaS business. The company is a profitable, maturing technology business delivering software and AI-driven solutions for industrial sectors. As a team lead, you'll mentor and provide technical guidance while working closely wi
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        Senior Principal Software Engineer

        Stott & May Professional Search Limited
        London
        £83000.00 - £90000.00 per annum
        We're looking for a Senior Principal Software Engineer to provide technical leadership, shape engineering standards, and mentor a team of engineers. This senior role combines architectural oversight with hands-on contribution, driving best practice and innovation across our platforms. Mentor and coach engineers to support career growth - Represent the Head of Software Engineering in decision-making forums - Proven experience in senior technical roles with architectural influence - Track record of mentoring engineers and leading by example - Location: UK (Hybrid - 2 days/week in Winchester or London office) Salary: Up to £83k + bonus + benefits - The Role - What You'll Do - Lead development across complex projects and cross-functional teams - Define an
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        Senior Software Developer

        Oscar Associates (UK) Limited
        NG1, Nottingham
        £60000 - £70000 per annum
        An innovative company within the construction sector are looking to an experienced Software Developer to join their talented development team. If you are an experienced Software Developer looking to join a company where personal progression and development is valued, then this is the role for you. There will be a lot of autonomy to leave your technical mark on their systems, as well as exploring modern technologies to continually transform and improve their market leading software. Constantly staying ahead of the curve and enabling their Developers to thrive. They have a real focus on making user friendly design, pulling data and research from their countless years of experience within the industry that then can get then get translated into efficient pieces of software. The Role - You
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        Senior Backend Software Engineer

        Plexus Resource Solutions Ltd
        EC1, City of London
        From £80,000 to £110,000 per annum
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        KEYWORDS: Contract .NET Developer, Microsoft Stack Engineer, AI/ML Engineer, Azure Developer, Banking Software Engineer, Outside IR35, Remote - New contract opportunity for an experienced .NET Developer to join a high-profile programme in the banking/fintech sector, delivering secure enterprise applications and integrating AI/ML solutions. * Open to UK/EU-Based Candidates Only * Outside IR35 * 9-12 Month Initial Contract | Start ASAP | Likely Extension * Independently manage and deliver technical projects end-to-end - greenfield project experience. * Design, develop, test, and deploy enterprise applications using Microsoft technologies. * Build secure fintech workflows aligned with compliance (GDPR, OAuth, encryption). * Integrate and deploy AI/ML components (NLP and recommendation systems). * Collaborate in an Agile
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        Java Developer

        UA Consulting Limited t/a The Grangeside Group
        EC2A, City of London
        From £50,000 to £65,000 per annum
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        Senior Backend Engineer

        Plexus Resource Solutions Ltd
        EC1, City of London
        From £180,000 to £200,000 per annum
        They are seeking a Senior Backend Engineer to scale systems, build high-performance APIs, and manage mission-critical infrastructure. -Architect, develop, and maintain backend services and APIs for high-volume data processing. -Implement monitoring, logging, and performance optimization for backend services. -Experience in backend engineering experience, bonus if within Fintech and Web3 -Proficiency in Node.js and backend frameworks. Dapp Analytics & Discovery - Remote: (HQ: London) £180K - £200K - Plexus is partnered with a global leader in blockchain analytics, delivering real-time insights, NFT valuations, and portfolio tools to millions worldwide. Their platform processes over 14 billion rows of data and 800 TB of information, driving actionable reporting for the Web3 ecosystem. T
        They are seeking a Senior Backend Engineer to scale systems, build high-performance APIs, and manage mission-critical infrastructure. -Architect, develop, and maintain backend services and APIs for high-volume data processing. -Implement monitoring, logging, and performance optimization for backend services. -Experience in backend engineering experience, bonus if within Fintech and Web3 -Proficiency in Node.js and backend frameworks. Dapp Analytics & Discovery - Remote: (HQ: London) £180K - £200K - Plexus is partnered with a global leader in blockchain analytics, delivering real-time insights, NFT valuations, and portfolio tools to millions worldwide. Their platform processes over 14 billion rows of data and 800 TB of information, driving actionable reporting for the Web3 ecosystem. T
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        We are looking for a Senior Backend Engineer to join our Algo & MLOps team. You will collaborate closely with Data Scientists, Backend and Data Engineers to lead major initiatives end-to-end ensuring that our ML infrastructure and services supporting model predictions adhere to our requirements of latency, reliability and scale. - Collaborate closely with data scientists, MLOps and backend engineers to build and manage infrastructure and services for training and deployment of a diverse set of ML and NLP models - We are the leader in human-centric cybersecurity. Half a million customers, including 87 of the Fortune 100, rely on Proofpoint to protect their organizations. Were driven by a mission to stay ahead of bad actors and safeguard the digital world. Join us in our pursuit to defe
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        Principal Software Engineer (Java/Python)

        Rise Technical
        London
        £90000.00 - £95000.00 per annum + Progression + Pension
        The ideal candidate is a hands-on Software Engineer with strong experience in Java and Python, confident working with AWS cloud infrastructure including containerisation (Docker/Kubernetes), architecture, and scaling systems. *Experienced Hands-on Software Developer with strong Java and Python experience - Technical Lead (Java/Python) An excellent opportunity awaits an experienced Developer with strong Python and Java experience join an exciting SaaS business. The company is a profitable, maturing technology business delivering software and AI-driven solutions for industrial sectors. As a team lead, you'll mentor and provide technical guidance while working closely wi
        The ideal candidate is a hands-on Software Engineer with strong experience in Java and Python, confident working with AWS cloud infrastructure including containerisation (Docker/Kubernetes), architecture, and scaling systems. *Experienced Hands-on Software Developer with strong Java and Python experience - Technical Lead (Java/Python) An excellent opportunity awaits an experienced Developer with strong Python and Java experience join an exciting SaaS business. The company is a profitable, maturing technology business delivering software and AI-driven solutions for industrial sectors. As a team lead, you'll mentor and provide technical guidance while working closely wi
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        NEW
        Our client an industry leading private sector business located in East Sussex is looking for a full stack .Net developer. * Relevant software development experience, with strong expertise in .NET (C#) And ideally VB.NET - Contract - 6 Months - East Sussex - Hybrid model (3 days p/w on site) £375 - 425 p/d (outside IR35) Key Roles * Participate in migration of legacy systems built in C#, VB.NET, Angular, using SQL Server technologies. * Maintaining applications, ensuring reliability, maintainability, and evolution. * Act as a liaison between the development team and internal business stakeholders. * Implementation of modern architectures: micro services, containerised services, and serverless cloud-native components in AWS. * Diagnose and resolve complex support issues. * Collaborate with Business Anal
        Our client an industry leading private sector business located in East Sussex is looking for a full stack .Net developer. * Relevant software development experience, with strong expertise in .NET (C#) And ideally VB.NET - Contract - 6 Months - East Sussex - Hybrid model (3 days p/w on site) £375 - 425 p/d (outside IR35) Key Roles * Participate in migration of legacy systems built in C#, VB.NET, Angular, using SQL Server technologies. * Maintaining applications, ensuring reliability, maintainability, and evolution. * Act as a liaison between the development team and internal business stakeholders. * Implementation of modern architectures: micro services, containerised services, and serverless cloud-native components in AWS. * Diagnose and resolve complex support issues. * Collaborate with Business Anal
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        Senior Guidewire Developer

        Pioneer Search
        City of London, London
        £90000 - £110000 per annum + 20% bonus
        An ACE Certified Guidewire Developer with experience with Guidewire for claims, and ClaimCenter configurations is required for a leading insurance organisation in London. Guidewire Developer - Ace Certified - The business is currently in the process of migrating to Guidewire and would be looking for a developer to lead them through the migration process and to monitor and configure the platform, as well as architect and design solutions being pioneered within the Guidewire Cloud. You should have strong development skills in Java and GOSU as well as stakeholder skills to help the organisation navigate the migration and onboard Guidewire. * Leadership: Leading the development, design, architecture, integration, and customisation of Guidewire for the insurer. * ACE Certified in Guidewire * Experience onboarding and integrating Guidewire for a specialty insurer
        An ACE Certified Guidewire Developer with experience with Guidewire for claims, and ClaimCenter configurations is required for a leading insurance organisation in London. Guidewire Developer - Ace Certified - The business is currently in the process of migrating to Guidewire and would be looking for a developer to lead them through the migration process and to monitor and configure the platform, as well as architect and design solutions being pioneered within the Guidewire Cloud. You should have strong development skills in Java and GOSU as well as stakeholder skills to help the organisation navigate the migration and onboard Guidewire. * Leadership: Leading the development, design, architecture, integration, and customisation of Guidewire for the insurer. * ACE Certified in Guidewire * Experience onboarding and integrating Guidewire for a specialty insurer
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        We're seeking a Senior Software Architect to help co-design next-gen data center platforms and scalable communications software. * Explore innovative solutions in HW and SW for our next generation platforms as part of co-design efforts involving GPU, Networking, and SW architects. NVIDIA is leading groundbreaking developments in Artificial Intelligence, High Performance Computing and Visualization. The GPU -- our invention -- serves as the visual cortex of modern computers and is at the heart of our products and services. Our work opens up new universes to explore, enables groundbreaking creativity and discovery, and powers inventions that were once considered science fiction, including artificial intelligence to autonomous cars. Come work for the team that brought to you NCCL, NVSHMEM & GPUDirect. Our GPU communicati
        We're seeking a Senior Software Architect to help co-design next-gen data center platforms and scalable communications software. * Explore innovative solutions in HW and SW for our next generation platforms as part of co-design efforts involving GPU, Networking, and SW architects. NVIDIA is leading groundbreaking developments in Artificial Intelligence, High Performance Computing and Visualization. The GPU -- our invention -- serves as the visual cortex of modern computers and is at the heart of our products and services. Our work opens up new universes to explore, enables groundbreaking creativity and discovery, and powers inventions that were once considered science fiction, including artificial intelligence to autonomous cars. Come work for the team that brought to you NCCL, NVSHMEM & GPUDirect. Our GPU communicati
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        NEW
        excellent knowledge of Java JDK 1817 JEE Maven Hibernate EJB 31 MQ SQL REST XML XSD JSON * experience with continuous integration Jenkins unit tests integration tests selenium based tests * very good knowledge of Application Servers WebSphere WebLogic or JBoss * very good knowledge of Oracle database * knowledge of Docker or Kubernetes environment * knowledge of Linux environment * knowledge of Kafka is an advantage * excellent problem solving teamworking and time management skills * payment expertise see next column * Optional knowledge of PostgreSQL JIRA Bitbucket XCT eg SWIFT MTMX Cross Border will be an asset * OPF general payments knowledge payment gateway * SEPASCTINST SEPA CT SEPA DD SEPA Instant Payment * CBIS payment gateway accounting
        excellent knowledge of Java JDK 1817 JEE Maven Hibernate EJB 31 MQ SQL REST XML XSD JSON * experience with continuous integration Jenkins unit tests integration tests selenium based tests * very good knowledge of Application Servers WebSphere WebLogic or JBoss * very good knowledge of Oracle database * knowledge of Docker or Kubernetes environment * knowledge of Linux environment * knowledge of Kafka is an advantage * excellent problem solving teamworking and time management skills * payment expertise see next column * Optional knowledge of PostgreSQL JIRA Bitbucket XCT eg SWIFT MTMX Cross Border will be an asset * OPF general payments knowledge payment gateway * SEPASCTINST SEPA CT SEPA DD SEPA Instant Payment * CBIS payment gateway accounting
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