Senior Software Engineer: Neurosymbolic AI & Scalable API

Company IconJack and Jill AI
Location IconLondon

Jack and Jill AI is looking for a Senior Software Engineer to join their team in Greater London. This role involves designing a public API and building systems that integrate probabilistic machine learning with deterministic computing. You will play...Read More>>.

Posted: June 6th, 2026
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Senior Backend Engineer for AI-Powered SaaS

Company IconEchobox
Location IconLondon

A fast-growing AI company in London is seeking a Back-End Developer to design and maintain systems for their innovative AI-powered products. You will collaborate with senior engineers and data scientists, optimize performance, and contribute to syste...Read More>>.

Posted: June 6th, 2026
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Senior .NET Data & AI Backend Engineer

Company IconOmnis Partners
Location Icon

A high-growth technology organisation is looking for a Senior Software Engineer (.NET) to join their Data & AI team in London. The successful candidate will be responsible for building scalable backend services, developing data models, and implementi...Read More>>.

Posted: June 6th, 2026
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Technical Project Lead: API, AI & Product Delivery

Company IconRoyalwares
Location Icon

Royalwares is looking for a Technical Project Manager to oversee project delivery across client engagements and internal product development. You'll need genuine technical literacy and be capable of engaging effectively with clients and developers...Read More>>.

Posted: June 6th, 2026
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Java Security Engineer - Enterprise Finance & IAM Expert

Company IconE-Solutions
Location Icon

E-Solutions is seeking a Java Security Engineer with at least 7 years of hands-on experience in the Java enterprise environment. The ideal candidate will have experience with Agile methodologies, enterprise financial solutions, and be proficient in J...Read More>>.

Posted: June 6th, 2026
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AI Backend Engineer: LLMs, AI Agents & MLOps

Company IconMoody
Location IconLondon

Moody is searching for an AI Software Engineer specializing in backend software development using Node.js and Python. The role includes designing production-grade software solutions leveraging machine learning techniques such as large language models...Read More>>.

Posted: June 6th, 2026
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AI Integration Engineer in London - Moneysupermarket.com Group PLC

Company IconJava Script Works
Location IconLondon

AI Integration Engineer London, United Kingdom Posted 9 months ago Moneysupermarket.com Group PLC Tech stack Artificial Intelligence React Next.js Frontend Experience...Read More>>.

Posted: June 6th, 2026
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Senior Full-Stack Engineer (Java + React) — AI-Driven Apps

Company IconGrid Dynamics
Location IconLondon

We are looking for a Senior Full-Stack Engineer to join our global Investment Banking client. You will be responsible for the development and overall implementation of AI-enabled web applications in a complex, critical and large cross-departmental...Read More>>.

Posted: June 6th, 2026
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Graduate Software Engineer - Night Shifts in London - Graduate Recruitment Bureau

Company IconJava Script Works
Location IconLondon

Job Responsibilities Working with clients to develop, test, and support their new and existing software products. Duties to Include: Developing high quality Java code Getting involved in design discu...Read More>>.

Posted: June 6th, 2026
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Data Platform Security Engineer – SaaS & API Risk

Company IconAviva
Location IconBristol

Aviva is looking for a Data Security Engineer to enhance the security posture across enterprise data platforms. You will implement security controls and monitor compliance with standards. Ideal candidates possess hands-on experience securing platf...Read More>>.

Posted: June 6th, 2026
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React Developer (Contract) — Design & Transformation

Company IconJava Script Works
Location Icon

React Developer (IT) United Kingdom Posted 9 months ago Tech stack Learning React Responsibilities Technical Troubleshooting Continuous Learning Software Desig...Read More>>.

Posted: June 6th, 2026
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Senior Full Stack Engineer (React, Redux, Node.JS, Ruby)

Company IconZebra People
Location IconLondon

A Unicorn company that have recently opened up a Enterprise division in London are looking for multiple full stack engineers to join their London based team.The clientIt’s an opportunity to have an immediate and real impact on...Read More>>.

Posted: June 6th, 2026
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Lead Full-Stack Engineer: Node/TS/React, AWS

Company IconJava Script Works
Location IconLondon

Java Script Works is looking for an experienced software developer based in Greater London, United Kingdom, with strong expertise in Node.js and Typescript. The ideal candidate will have a minimum of 5 years of backend experience and 3 years of UI...Read More>>.

Posted: June 6th, 2026
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Senior Backend Engineer - AI-Driven Marketplace

Company IconJack & Jill/External ATS
Location IconLondon

A leading fashion tech startup in London is seeking a Senior Backend Software Engineer to architect transaction systems for their AI-native secondhand fashion marketplace. You'll work on scalable systems integrating AI models into ecommerce, impactin...Read More>>.

Posted: June 6th, 2026
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Senior Full-Stack Engineer (Java/React) — Build AI-driven research tools

Company IconRELX
Location IconOxford

A global leader in information and analytics is seeking a Senior Full Stack Software Engineer in Oxford. This role involves designing and developing cloud-based applications, collaborating with stakeholders, and mentoring team members. Ideal candidat...Read More>>.

Posted: June 6th, 2026
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AI Backend Engineer — LLMs, AI Agents & MLOps

Company IconPassFort
Location IconLondon

PassFort is searching for a Software Engineer specializing in AI systems to design and implement advanced machine learning solutions. The successful candidate will have over 3 years of experience in backend software development, focusing on Node.j...Read More>>.

Posted: June 6th, 2026
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Security Engineer: API, IAM & Automation

Company IconAnson McCade
Location IconGlasgow

A leading technology recruitment firm is seeking a Security Engineer in the UK to design secure systems focusing on API security. The ideal candidate will have experience in DevSecOps or Security Engineering with strong skills in Python, Bash, IAM, a...Read More>>.

Posted: June 6th, 2026
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Senior Backend Architect — Global Gaming Platform

Company IconIMAGE FRAME INVESTMENT (UK) LIMITED
Location IconLondon

IMAGE FRAME INVESTMENT (UK) LIMITED is seeking an experienced backend developer with over 8 years of experience, including 5 years in the gaming industry. This role involves providing technical support for overseas game projects and collaborating...Read More>>.

Posted: June 6th, 2026
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Lead Software Engineer: AI-Driven Payments (Java)

Company IconJPMorgan Chase & Co.
Location IconGlasgow

JPMorgan Chase & Co. is seeking a Lead Software Engineer to join their Payments team in Glasgow. This role focuses on developing technical solutions for a fully cloud-based payments application, ensuring high performance and low latency. You will exe...Read More>>.

Posted: June 6th, 2026
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Golang Backend Engineer — AI, OpenSearch on AWS

Company IconS-RM
Location IconLondon

S-RM, a leading global intelligence and cyber security consultancy, is recruiting a Golang Developer in London. This role is pivotal in supporting the Corporate Intelligence team, focusing on developing complex software products. Responsibilities inc...Read More>>.

Posted: June 6th, 2026
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Frontend & UX Designer (Figma, React)

Company IconJava Script Works
Location IconLondon

Java Script Works is looking for a front-end developer in Greater London. The role involves designing wireframes and building responsive UIs using HTML, CSS, and JavaScript (React or similar). You will collaborate with backend developers and produ...Read More>>.

Posted: June 6th, 2026
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Senior Java Software Engineer II — AI-Driven Cloud Solutions

Company IconRELX
Location IconOxford

A leading information and analytics company in the UK is seeking a Senior Java Software Engineer II to enhance its cloud-hosted systems supporting scientific research. You will work in a dynamic Agile team, focusing on design, development, and deploy...Read More>>.

Posted: June 6th, 2026
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Senior Backend Engineer — AI-Powered SaaS

Company IconEchobox
Location IconLondon

A fast-growing tech company in the UK is looking for a Back-end Developer to work closely with the Product team and Data Scientists. The role involves designing and maintaining back-end services while ensuring high performance and reliability. The id...Read More>>.

Posted: June 6th, 2026
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Senior Backend Engineer for AI-Powered SaaS

Company IconPassFort
Location IconLondon

PassFort is seeking a talented back-end developer to join their team in Greater London. You will work closely with product teams to design and build robust back-end systems that support innovative AI solutions.The ideal candidate has 3-5 ye...Read More>>.

Posted: June 6th, 2026
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Senior Front-End Engineer — Crypto UI/UX (React/TypeScript)

Company IconJava Script Works
Location IconLondon

Java Script Works is seeking a front-end software developer with over 5 years of experience. The role involves innovating and participating in building crypto services around software quality, UI/UX, security, and blockchain technology. The ideal can...Read More>>.

Posted: June 6th, 2026
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Frontend Engineer & AI Coding Trainer

Company IconJava Script Works
Location IconLondon

A technology training company in London is seeking an AI Chatbot Coding Trainer. The role involves helping to train chatbots to code. Candidates should be fluent in English, proficient in Python and/or JavaScript, and possess a bachelor’s degree. S...Read More>>.

Posted: June 6th, 2026
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Senior Tech Lead — Cloud, API & E‑commerce Architect

Company IconCrimson
Location IconEnfield

A leading IT consulting firm in Enfield is seeking a Head of Delivery – Technical Development Lead. This role involves leading hands-on development and architecture, managing integrations, and mentoring a technical team. The ideal candidate should...Read More>>.

Posted: June 6th, 2026
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Senior UI Designer & React Front-End Architect

Company IconJava Script Works
Location IconLondon

ExperienceVisual Studio Online3+ years of professional front-end development experience, including 3+ years of React.js.Proficient in JavaScript, ES6+, HTML5, and CSS3 (including SASS, LESS, and styled-components).Experi...Read More>>.

Posted: June 6th, 2026
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Automation QA Engineer: Cloud & API Testing, Growth Path

Company IconMaxwell Bond
Location IconLeeds

Maxwell Bond is seeking an Automation Test Engineer in Leeds. The role involves manual and automation testing using Java, Selenium, and other tools, contributing to the enterprise cloud-native platform. You'll work in a supportive environment with op...Read More>>.

Posted: June 6th, 2026
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Fintech .NET Core Engineer – Greenfield API & Blockchain

Company IconBlockchain Works
Location IconLondon

A well-known fintech company in the City of London is seeking Engineers to join their 30-man flat Dev Team. Candidates should have a degree in Computer Science and strong experience with .Net Core, C#, TypeScript, and Docker. The role involves develo...Read More>>.

Posted: June 6th, 2026
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Accessibility Specialist (With Automation Experience) in London - Solirius Reply

Company IconJava Script Works
Location IconLondon

Accessibility Specialist (With Automation Experience) London, United Kingdom Posted 10 months ago Accessibility Specialist role focused on building test automation frameworks from scratch and scripting in JavaScript and T...Read More>>.

Posted: June 6th, 2026
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Automation QA Engineer - UI/API & CI/CD

Company IconIBM
Location IconLondon

IBM in Greater London is seeking a Quality Engineer with automation experience to develop reliable automated tests. You will collaborate with cross-functional teams and utilize modern tools like Selenium and Cypress. Responsibilities include creating...Read More>>.

Posted: June 6th, 2026
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Automation QA Engineer – Playwright, Cypress & CI/CD

Company IconJava Script Works
Location IconLondon

Java Script Works in Greater London is seeking a candidate skilled in automated testing tools such as Playwright and Cypress, as well as scripting languages like TypeScript and JavaScript. The ideal applicant should have a strong grasp of CI/CD tools...Read More>>.

Posted: June 6th, 2026
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Elastic Stack Engineer for AI-Driven Data Platform

Company IconJava Script Works
Location IconLondon

Java Script Works is seeking an Elastic Stack Engineer to join their team in Greater London. In this role, you will engage with advanced technologies including artificial intelligence and machine learning, collaborating with multiple development team...Read More>>.

Posted: June 6th, 2026
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Senior Test Automation Engineer – Banking & API/UI CI/CD

Company IconPersistent Systems
Location IconGlasgow

Persistent Systems is hiring a Test Automation Engineer in Glasgow, UK. This role involves designing and maintaining automated test solutions for complex banking applications, playing a crucial part in Barclays’ digital transformation. Applicants s...Read More>>.

Posted: June 6th, 2026
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Front End Developer - Javascript, React & Typescript in London - Wolf & Badger

Company IconJava Script Works
Location IconLondon

Skills and Experience NeededWith modern frontend build pipelines and tools,Also very desirable:Experience using GatsbyJS or NextJSFamiliarity with TypescriptKnowledge of Storybook and Design Syste...Read More>>.

Posted: June 6th, 2026
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Senior Automation Test Engineer — CI/CD & API Testing (Flexible)

Company IconIBM Computing
Location IconLondon

IBM Computing seeks a Senior Automation Test Engineer in Greater London. This position involves designing and developing automated test scripts to support our public sector clients. The ideal candidate will collaborate with cross-functional teams,...Read More>>.

Posted: June 6th, 2026
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Senior Automation Engineer in Northampton - Barclays

Company IconJava Script Works
Location IconNorthampton

Skills/ExperienceHere are the skills/experience required:Experience in designing and implementing test automation frameworks for both front end (e.g. React.js) and back-end applications (e.g. Java Spring Boot), ensuring hig...Read More>>.

Posted: June 7th, 2026
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Senior Business Analyst: React & API‑Driven Product Lead

Company IconUniversal Music Holdings Ltd
Location Icon

Universal Music Holdings Ltd is hiring a Senior Business Analyst to join its dynamic product team in the UK. This pivotal role involves bridging complex business requirements and user experience within key products built in React.The ideal...Read More>>.

Posted: June 8th, 2026
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Senior Automation Test Engineer – Flexible CI/CD, API & UI Testing

Company IconIBM
Location IconManchester

IBM is seeking a Senior Automation Test Engineer to support public sector and defense clients. The role involves delivering automated testing solutions, designing test scripts, and collaborating with DevOps teams to enhance product quality. The po...Read More>>.

Posted: June 8th, 2026
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Senior Backend Engineer - AI-Driven MedTech

Company IconAisthesis Medical Limited
Location Icon

A fast-moving MedTech startup is seeking a Senior Back-End Developer to shape backend systems. You will design high-performance services enabling real-time healthcare data processing. The ideal candidate has strong Python skills, experience with micr...Read More>>.

Posted: June 10th, 2026
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Lead Software Engineer – Java, AI & AWS, Agentic AI

Company IconJ.P. MORGAN
Location IconGlasgow

J.P. MORGAN in Glasgow is hiring a Lead Software Engineer to design and implement cutting-edge AI and data engineering solutions. You will collaborate within a cross-functional team to develop innovative products that meet critical business object...Read More>>.

Posted: June 10th, 2026
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Back-end Developer (Java &Spring Boot/GCP) - inside IR35

Company IconMethods Business and Digital Technology Ltd
Location IconLondon

Methods is looking for a Back End Developer specialising in Java Spring Boot and GCP(Google Cloud Platform) to join our team within the private Sector Business unit. Rate:£490 inside IR35 Duration:6 month initially...Read More>>.

Posted: June 10th, 2026
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Senior Ruby on Rails Engineer - Scale Reliable Backend

Company IconFynity
Location IconLondon

Fynity is seeking a Mid/Senior Ruby Engineer to join a growing team focused on SaaS platforms for operational workflows. The ideal candidate has strong experience with Ruby on Rails and will be responsible for maintaining scalable backend services...Read More>>.

Posted: June 11th, 2026
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Senior Java Engineer (Kafka, Kubernetes, SpringBoot) – Banking

Company IconSalt Digital Recruitment
Location IconLondon

Senior Java Engineer (Kafka, Kubernetes, SpringBoot) - Banking - London/HybridDaily rate: €600 - €700 (inside IR35) Duration: 12 months Start: ASAPMy client is looking for a Senior Java Engineer to join on a contract basis. Th...Read More>>.

Posted: June 12th, 2026
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Java Engineer: Spring Boot, Kafka & Production Support

Company IconCapgemini
Location IconGlasgow

Capgemini is seeking a Java Developer in Glasgow to enhance enterprise Java applications. This role will involve delivering new functionalities, resolving defects, and ensuring system stability.The ideal candidate should have strong Java de...Read More>>.

Posted: June 12th, 2026
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Backend Engineer for AI Agents & Cybersecurity

Company IconMaze
Location IconLondon

Maze is seeking an Engineer to shape our product through the development of AI Agents and ML systems. This role involves designing, building, and scaling solutions in AI-powered cybersecurity, influencing architecture and user experience.Yo...Read More>>.

Posted: June 12th, 2026
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Java Full-Stack Dev (Mid-Senior) – Spring Boot + React/Angular

Company IconCubestech Ltd
Location IconBournemouth

Cubestech Ltd is seeking a Java Full Stack Developer (Java FSD) for a contract position in Bournemouth, UK. This role is ideal for a mid-senior level developer experienced in Java and Spring Boot for backend work.The successful candidate wi...Read More>>.

Posted: June 13th, 2026
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Senior Backend Software Engineer (£100k–£140k + Equity) at $50M Series B AI-native marketplace

Company IconJack & Jill
Location IconLondon

Job Title Senior Backend Software Engineer Salary £100k–£140k + Equity Company Description $50M Series B AI-native marketplace backed by a16z and Y Combinator Job Description You will...Read More>>.

Posted: June 13th, 2026
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Senior Rust/C++ Backend Engineer – Crypto Trading

Company IconAXS Blockchain
Location IconLondon

AXS Blockchain is seeking a Senior Software Engineer for their Institutional team in Paris. The role involves building scalable trading services in RUST and enhancing OMS functionality. Candidates should have extensive experience in C++ and/or Rus...Read More>>.

Posted: June 13th, 2026
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