14 senior backend engineer jobs found

Senior Platform Engineer - Contract - Outside IR35 Full job description We’re looking for an EPOS & SCO Platform Engineer to build, configure, and support the in-store point of sale and self-checkout platforms across the estate. You’ll own the full lifecycle of Travel Money Kiosks, EPOS and Hospitality infrastructure, including till hardware, self-checkout units, peripherals, and backend systems—ensuring services are secure, compliant, resilient, and consistently deployed at scale. You’ll automate provisioning, configuration, updates, and monitoring so stores benefit from reliable transaction processing, seamless customer journeys, and minimal downtime. Success means stable retail operations, predictable performance, and confidence from store colleagues, product owners, and operations teams. This is a hybrid role where 3 days per week are expected on site in Bracknell. Requirements Role Responsibilities: Design,...

Senior Platform Engineer - Contract - Outside IR35 Full job description We’re looking for an EPOS & SCO Platform Engineer to build, configure, and support the in-store point of sale and self-checkout platforms across the estate. You’ll own the full lifecycle of Travel Money Kiosks, EPOS and Hospitality infrastructure, including till hardware, self-checkout units, peripherals, and backend systems—ensuring services are secure, compliant, resilient, and consistently deployed at scale. You’ll automate provisioning, configuration, updates, and monitoring so stores benefit from reliable transaction processing, seamless customer journeys, and minimal downtime. Success means stable retail operations, predictable performance, and confidence from store colleagues, product owners, and operations teams. This is a hybrid role where 3 days per week are expected on site in Bracknell. Requirements Role Responsibilities: Design,...

Must have skills: Demonstrable experience with Solidity. Strong understanding of blockchain security practices and potential vulnerabilities. Proficiency in Hardhat and Foundry. Experience with Solidity security testing tools like Slither, Mythril, Echidna Practical experience with scripting languages like Javascript or Typescript. Ability to craft unit, integration, fork, and invariant tests, ensuring code longevity. Demonstrable aptitude for best development practices, data structures, algorithms, and methodologies. Bachelor's degree in Computer Science, Engineering, or a related STEM discipline. Excellent debugging and troubleshooting skills. Strong written and verbal communication skills. Self-motivated with the ability to work in a fast-paced, evolving environment. Proficient communication skills in English. Development background in sectors such as banking, finance, or trading, paired with a comprehensive grasp of financial...

Senior Platform Engineer - Contract - Outside IR35 We’re looking for an EPOS & SCO Platform Engineer to build, configure, and support the in-store point of sale and self-checkout platforms across the estate. You’ll own the full lifecycle of Travel Money Kiosks, EPOS and Hospitality infrastructure, including till hardware, self-checkout units, peripherals, and backend systems—ensuring services are secure, compliant, resilient, and consistently deployed at scale. You’ll automate provisioning, configuration, updates, and monitoring so stores benefit from reliable transaction processing, seamless customer journeys, and minimal downtime. Success means stable retail operations, predictable performance, and confidence from store colleagues, product owners, and operations teams. This is a hybrid role where 3 days per week are expected on site in Bracknell. Requirements Role Responsibilities: Design, build, and maintain EPOS and SCO...

Senior Platform Engineer - Contract - Outside IR35 We’re looking for an EPOS & SCO Platform Engineer to build, configure, and support the in-store point of sale and self-checkout platforms across the estate. You’ll own the full lifecycle of Travel Money Kiosks, EPOS and Hospitality infrastructure, including till hardware, self-checkout units, peripherals, and backend systems—ensuring services are secure, compliant, resilient, and consistently deployed at scale. You’ll automate provisioning, configuration, updates, and monitoring so stores benefit from reliable transaction processing, seamless customer journeys, and minimal downtime. Success means stable retail operations, predictable performance, and confidence from store colleagues, product owners, and operations teams. This is a hybrid role where 3 days per week are expected on site in Bracknell. Requirements Role Responsibilities: Design, build, and maintain EPOS and...

Must have skills: Demonstrable experience with Solidity. Strong understanding of blockchain security practices and potential vulnerabilities. Proficiency in Hardhat and Foundry. Experience with Solidity security testing tools like Slither, Mythril, Echidna Practical experience with scripting languages like Javascript or Typescript. Ability to craft unit, integration, fork, and invariant tests, ensuring code longevity. Demonstrable aptitude for best development practices, data structures, algorithms, and methodologies. Bachelor's degree in Computer Science, Engineering, or a related STEM discipline. Excellent debugging and troubleshooting skills. Strong written and verbal communication skills. Self-motivated with the ability to work in a fast-paced, evolving environment. Proficient communication skills in English. Development background in sectors such as banking, finance, or trading, paired with a comprehensive grasp of financial...

We are looking for a Senior Fullstack Mobile Engineer with a strong emphasis on backend architecture to join the team developing a greenfield platform. You will own the end-to-end technical delivery of features, with the majority of your time focused on designing and building a robust, secure, and scalable backend using NestJS, Node.js and TypeScript . On the mobile side, you will contribute to feature integration and deployment within a React Native and Expo environment, ensuring seamless delivery across the full technology stack. The platform operates within a large enterprise technology ecosystem, so this role requires a senior engineer who is comfortable driving technical discussions, making architectural decisions, aligning infrastructure, and collaborating with neighbouring teams working across different technology stacks, including Kotlin and Spring Boot .   This role requires onsite time in Pimlico and sits inside IR35.   Backend...

Skills & Experience Job roles: AI Engineer Experience level: Mid, Senior Core skills considered: Artificial Intelligence, Python, APIs, Cloud Computing, Docker Other skills considered: Kubernetes, Terraform, CI/CD, Data Pipelines Logistics Base salary: Undisclosed Employment type: Freelance/Contract Remote working: Remote Work from: Within Europe Visa sponsorship: Not available Job Description You 9ll design, build, and integrate advanced AI models into real software systems. This role sits at the intersection of software engineering, data science, and MLOps, turning research into robust, scalable, production-ready AI services. Core Responsibilities Model Engineering Build functional AI services from architectural designs Orchestrate data ingestion, inference flows, and output pipelines Optimise...

Who Are We? Xcelirate develops technologically-advanced platforms which are accessed by thousands of users every minute! We are proud to offer a workplace where the sharpest developers come together to strategically plan and swiftly execute practices which see us maintain our existing market dominance and attain global expansion. We owe our success to our customers who have seen us grow across a decade, and our talented team who have made that growth possible!   What are we looking for? You're a Principal-Level Engineer first. The tech lead title is almost incidental. It just means you're the person the team orbits around, because that's what happens naturally when you're the one who understands the system most deeply and keeps the clearest head under pressure. The 10% that's people management fits inside your engineering work, not alongside it. You hire, you steer, you unblock, but you do it the way a strong engineer does everything: with good...

Senior Platform Engineer - Contract - Outside IR35 Full job description We’re looking for an EPOS & SCO Platform Engineer to build, configure, and support the in-store point of sale and self-checkout platforms across the estate. You’ll own the full lifecycle of Travel Money Kiosks, EPOS and Hospitality infrastructure, including till hardware, self-checkout units, peripherals, and backend systems—ensuring services are secure, compliant, resilient, and consistently deployed at scale. You’ll automate provisioning, configuration, updates, and monitoring so stores benefit from reliable transaction processing, seamless customer journeys, and minimal downtime. Success means stable retail operations, predictable performance, and confidence from store colleagues, product owners, and operations teams. This is a hybrid role where 3 days per week are expected on site in Bracknell. Requirements Role Responsibilities: Design,...

Must have skills: Demonstrable experience with Solidity. Strong understanding of blockchain security practices and potential vulnerabilities. Proficiency in Hardhat and Foundry. Experience with Solidity security testing tools like Slither, Mythril, Echidna Practical experience with scripting languages like Javascript or Typescript. Ability to craft unit, integration, fork, and invariant tests, ensuring code longevity. Demonstrable aptitude for best development practices, data structures, algorithms, and methodologies. Bachelor's degree in Computer Science, Engineering, or a related STEM discipline. Excellent debugging and troubleshooting skills. Strong written and verbal communication skills. Self-motivated with the ability to work in a fast-paced, evolving environment. Proficient communication skills in English. Development background in sectors such as banking, finance, or trading, paired with a comprehensive grasp of financial...

We are looking for a Senior Fullstack Mobile Engineer with a strong emphasis on backend architecture to join the team developing a greenfield platform. You will own the end-to-end technical delivery of features, with the majority of your time focused on designing and building a robust, secure, and scalable backend using NestJS, Node.js and TypeScript . On the mobile side, you will contribute to feature integration and deployment within a React Native and Expo environment, ensuring seamless delivery across the full technology stack. The platform operates within a large enterprise technology ecosystem, so this role requires a senior engineer who is comfortable driving technical discussions, making architectural decisions, aligning infrastructure, and collaborating with neighbouring teams working across different technology stacks, including Kotlin and Spring Boot .   This role requires onsite time in Pimlico and sits inside IR35.   Backend...

Job Information Date Opened 25/08/2026 Job Type Contract Industry IT Services Work Experience 5+ years Salary £400 - £425 Outside IR35 About Scrumconnect Consulting Scrumconnect Consulting is a multi-award-winning digital consultancy, recognised for delivering impactful technology solutions across UK government departments. Our work has positively influenced the lives of over 40 million UK citizens. With a strong commitment to user-centred design and agile delivery, we continue to build innovative digital services that truly make a difference. Role Purpose We are looking for an experienced  Backend Developer  to design, build, and maintain scalable, secure server-side services and APIs, while contributing to the adoption of  Agentic AI  capabilities within our engineering platform. The role sits at  SFIA Level 4 : the individual works under general direction, uses discretion in resolving...

Are you a coding expert fluent in Python eager to shape the future of AI? Large‑scale language models are evolving from clever chatbots into powerful engines of scientific discovery. With high‑quality training data, tomorrow's AI can democratize world‑class education, keep pace with cutting‑edge research, and streamline software development for engineers everywhere. That training data begins with you—we need your expertise to help power the next generation of AI. We're looking for Python coding specialists who live and breathe algorithms, data structures, software architecture, frontend and backend development, cloud infrastructure, and systems programming—and who can do so fluently using Python. You'll challenge advanced language models on topics like asynchronous programming, RESTful API integration, memory management, object-oriented design, secure coding practices, and debugging distributed systems—documenting every failure mode so we can harden model...