2,330,368+ Full Stack Software Engineer Javascript React Elixir Jobs in UK — Top Companies Hiring July 2026

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Staff Backend Engineer — Data Lakehouse & Data Integration

Blumberg Capital Company seeks a Staff Backend Software Engineer to join our Partner Platform team. This role focuses on building scalable data integration pipelines and contributing to critical engineering projects impacting clients and internal teams. Ideal candidates will have strong programming ski ...

Senior Java Engineer Real Time Payments & Reactive

Icon Solutions, located in Greater London, is looking for an experienced Software Engineer with a solid product engineering background. You will be pivotal in delivering a cutting-edge solution for real-time payment processing, working hands-on to solve complex challenges. The ideal candidate should ha ...

Senior Storage & Compute Reliability Engineer

A leading financial technology firm in London is seeking a Senior Software Engineer for their Storage and Compute Stability Team. This role focuses on ensuring reliability, performance, and security of cloud infrastructure while collaborating with cross-functional teams. Candidates should have strong programming ...

Senior QA Engineer: Remote, Impactful Test Leader

A global security solutions company in Greater London is seeking a Senior Software Test Engineer with over 5 years of experience. In this role, you will oversee the planning and execution of testing activities within cross-functional teams, focusing on test automation and quality engineering. You will work with ...

Senior SDET: Architect Global Testing Frameworks (Remote)

BR-DGE in Edinburgh is seeking a Senior Software Development Engineer in Test to build and scale our automated testing infrastructure. The role focuses on engineering systemic solutions that allow development teams to own their quality and deploy safely. Ideal candidates are passionate about infrastruc ...

Senior AI Platform Engineer & Tech Lead

Compare the Market in Peterborough is seeking a Senior Software Engineer for AI Native Platforms. In this role, you will lead the design and development of AI agent interaction services while mentoring engineers. Your responsibilities include driving the application of GenAI to modernise systems and influencing ...

Remote Senior Distributed Systems Engineer — Managed Services

Grafana Labs is looking for a Senior Software Engineer for their Managed Services team in the UK. This role involves operating multi-cloud streaming clusters, diagnosing system performance issues, and designing upgrade strategies. Applicants should have 6+ years of engineering experience, particularly in distrib ...

Senior Ruby on Rails Engineer — AI Health Platform

Jack and Jill AI is seeking a Senior Software Engineer to design scalable backend architectures using Ruby on Rails. You'll work in a collaborative and high-autonomy environment at the forefront of health-tech, integrating AI-driven insights into personalized health journeys. The role offers a wellness-focused c ...

Senior Data Platform Engineer (Trading Systems)

A leading Investment Manager in the UK is seeking an experienced Software Engineer for an initial 6-month role that could lead to permanent employment. The position involves working within a core engineering team to develop and enhance data and infrastructure platforms supporting systematic trading strategies. T ...

Senior Electrical Engineer – High Voltage & Critical Systems

Ramboll is seeking a Senior/Principal Electrical Engineer to join their Critical Systems Team in Southampton. This role involves providing electrical design expertise, particularly in high voltage systems, while mentoring junior staff and managing project work. The ideal candidate will have a track rec ...

Platform Engineer – Fintech Cloud & Automation

A leading financial services firm in the UK seeks a Platform Engineer to join the platform team. The role focuses on developing secure, high-quality production code and deploying Kubernetes applications. Ideal candidates should possess hands-on experience in software engineering and cloud technologies. The compa ...

Senior AI Driven Engineer | Build Autonomous Ad Engine

Adzact in the United Kingdom is seeking a Senior Engineer to build an autonomous B2B ad engine. This role focuses on developing core platform systems and involves working with cutting-edge technologies like Python, AWS, and Docker. Candidates should have over 5 years of software delivery experience and an owners ...

Senior AI Engineer — Human Centric LLM & Systems

A cutting-edge AI development company is seeking a Senior Software Engineer to work in a hybrid role in London. This position focuses on developing innovative AI solutions, requiring deep proficiency in TypeScript and a background in disruptive technologies. The ideal candidate will enjoy building intelligent sy ...

Senior Embedded UI Engineer for Live Streaming

A leading streaming platform seeks a Senior Software Engineer to innovate on core features for the Roku platform. You'll enhance user experience through embedded UI development and work on complex features with a talented team. The ideal candidate is experienced in embedded C++ and Typescript, understands core O ...

Senior Cloud Infra Engineer Go & Kubernetes

A leading tech company in Greater London seeks a Cloud Infrastructure Software Engineer to design and maintain Golang services for their streaming data platform. You will ensure the performance and availability of the cloud infrastructure and work alongside other engineers to build a powerful PaaS application. T ...

Senior Lead Backend Engineer – Services (Hybrid, London)

Capital One (Europe) plc is seeking a Senior Software Development Engineer in London, UK. This role involves leading a backend team in delivering complex projects and requires proven technical leadership and exceptional programming skills in modern OO languages, preferably Java. The position offers a hybrid work ...

Senior Platform Engineer — High Performance Trading

A technology firm focusing on trading platforms is looking for a Senior Software Engineer to enhance its trading platform. The role involves architecting solutions, optimizing performance, and ensuring system stability. Candidates should have deep experience with mission-critical distributed systems and be skill ...

Senior C#/.NET Engineer for Risk Systems (Hybrid London)

A financial services vendor in Central London is seeking a Senior Software Engineer with expertise in C# and .NET to join their dynamic team. The role involves immediate contributions to web application design and development, while also fostering collaboration and innovation. Ideal candidates have experience wi ...

Principal Platform Integration Architect

Broadridge Financial Solutions is searching for a Principal Development Engineer in London. This role will involve contributing to the technical architecture and integration design of the enterprise platform. The successful candidate will be responsible for project scoping, technical architecture documentatio ...

Senior Backend Engineer — SaaS Banking Platform

A technology firm in banking is seeking a Senior Software Engineer to lead projects and contribute to their award-winning platform. You will work primarily with Java and be involved in building new features and internal tooling. The ideal candidate has experience in cloud technologies like AWS and GCP, understan ...

Senior Go Engineer – Kubernetes Security & WAF

Cisco Systems is seeking a Senior Software Engineer to develop a Go-based control plane for traffic security in Kubernetes environments. You will be responsible for building and enhancing the management of an eBPF datapath, ensuring security in cloud and hybrid enterprise scenarios. The ideal candidate will have ...

Senior Ruby on Rails Tech Lead – Build, Guide & Influence

A leading experience commerce platform in London is seeking a Senior Software Engineer to develop core services and mentor team members. This role involves building and maintaining Ruby on Rails applications, optimizing performance, and collaborating with product leaders on technical strategies. The ideal candid ...

Senior Ruby on Rails Engineer & Tech Lead

Easol Trading Limited is seeking a Senior Software Engineer in Greater London to develop core services and mentor engineering talent. This role involves building and maintaining Ruby on Rails applications, leading teams, collaborating on product development, and ensuring high-quality engineering practices. You w ...

Senior JVM Kotlin Backend Engineer (Hybrid, London)

A leading technology firm is seeking a Senior Software Engineer to design and build essential backend services for a scalable marketing platform. The role requires a strong foundation in JVM-based development, preferably Kotlin, along with robust SQL experience and knowledge of automated testing. You will collab ...

Senior Backend Engineer, Flights Booking (Hybrid/Remote)

On the Beach is looking for a Senior Software Engineer to join their Flights Booking team in Manchester. You will build scalable backend systems to connect customers with flight providers and ensure a seamless booking process. This role requires strong skills in distributed systems and operational exce ...

Senior C# Engineer for Greenfield Trading Systems

An innovative proprietary trading firm in London is looking for a Senior C# Software Engineer. You will work on greenfield projects and use cutting-edge technology to influence trading systems. The ideal candidate will have a strong background in C# and .NET, alongside experience with database technologies such ...

Senior UI Engineer, Subscriptions (Typescript)

Roku, Inc. in Cambridge is seeking a Senior Software Engineer to pioneer development for the Roku platform. You will develop core features for the Roku Channel app and work closely with multiple teams including Product Development and UI/UX design. The position demands strong experience in Typescript, ...

Senior Mechanical Engineer Data Centre & Mission Critical

A leading engineering consultancy in Leeds seeks a Principal Mechanical Engineer to deliver high-quality, sustainable solutions in Data Centre projects. The role involves leading design delivery, managing client relationships, and ensuring project success with a focus on innovation. Ideal candidates will hold Ch ...

Senior Platform Engineer — Greenfield Data Platform Hybrid

Baringa is looking for a Senior Platform Software Engineer to join the Data and Processing Platform team in Greater London. This role involves shaping the design and ongoing support of a greenfield Data and Processing Platform, engaging closely with teams to enhance capabilities. The ideal candidate sh ...

Senior Civil Engineer: Drainage & Infrastructure Lead

Penguin Recruitment is looking for a Senior Civil Engineer in Hemel Hempstead to lead drainage and infrastructure design while taking technical ownership of projects. This role involves working closely with a multidisciplinary team on various developments across the South East UK. Applicants should hav ...

Senior Geotechnical Engineer — Lead Projects & Mentorship

BWB Consulting Ltd in Manchester is seeking a Geotechnical Engineer to lead projects from concept to delivery. This role combines office and site work, focusing on delivering innovative design solutions across various geotechnical challenges while building strong client relationships. The ideal candida ...

Senior Ruby on Rails Engineer — Scale Fintech Impact (UK)

A fast-growing fintech startup is seeking a Software Engineer to join their team in Greater London. The role involves working within a cross-functional squad to develop features aimed at enhancing users' financial health using Ruby on Rails. Candidates should have at least 4 years of industry experience, with a ...

Senior Civil Engineer Drainage & Infrastructure Lead

Penguin Recruitment is looking for a Senior Civil Engineer based in Hemel Hempstead. In this role, you will take technical ownership of drainage and infrastructure design projects while mentoring junior engineers and fostering client relationships. You'll work in an established consultancy focused on resident ...

Senior Structural Engineer — Hybrid, Oxford, £45k £55k

Aldwych Consulting Ltd in Oxford seeks a Senior Structural Engineer to manage and deliver complex structural design projects. The ideal candidate will have proficiency in structural analysis software, excellent communication skills, and a desire to attain chartership. Join a multidisciplinary property ...

Senior Mechanical Engineer – Renewables Scale Up

A pioneering synthetic fuel company in Greater London seeks a Senior Mechanical Engineer to design and integrate complex systems for large-scale renewable energy applications. The role requires over 5 years of professional experience and expertise in thermofluids, simulation, and system design using CAD software ...

Senior Public Health Design Engineer – London

Energy Jobline CVL is seeking a Senior Public Health Design Engineer for their London office. The role focuses on delivering public health design engineering services across a range of projects, from large commercial to high-end residential. Candidates should have 5+ years of relevant experience, strong softw ...

Civil Design Lead Water & Wastewater Projects

Avove Utilities in Warrington is seeking a Senior Civil Engineer to advance the civil design aspects of water industry projects. You will lead projects as part of a multidisciplinary team, supervising junior engineers and ensuring successful project deliveries. Applicants should have a strong technical ...

Lead Mechanical Engineer Equipment & Technology (Hybrid)

HR Wallingford seeks an experienced Principal Engineer for leading projects involving mechanical solutions. This role encompasses collaboration with electrical and software teams to deliver high-quality solutions. The candidate should possess a strong background in mechanical engineering and experience with l ...

Product Security Engineer for AI‑Driven Secure Platforms

Creandum Advisor LLP is looking for a Security Engineer to join its team in London, United Kingdom. The ideal candidate will have over 3 years of experience in security engineering, partnering with teams to integrate security into the software development lifecycle, and expertise in security concepts such as ...

Structural Engineer — Hybrid Role with Project Leadership

AECO is looking for a Structural Engineer based in their South West offices, including Bristol, Plymouth, Exeter, Cardiff, or Basingstoke. The successful candidate will manage design processes, assist with structural design of complex projects, and provide support to graduate engineers. Candidates shou ...

Power System Studies Engineer — Remote Day, ETAP/EMT

Swan Recruitment Ltd. is seeking a Power System Studies Engineer for a 6 - 12 month assignment in Leatherhead. The role will involve supporting onshore projects related to power generation, including running various power system studies. The ideal candidate will have experience in equipment sizing, loa ...

Contract BMS Engineer – London (Trend/Tridium)

VIGO Recruitment is actively seeking a knowledgeable BMS Engineer for a 6-12 month contract role based in London. The successful candidate will drive hardware and software installations and offer technical support, ensuring solutions meet specifications and are delivered on time. The ideal candidate wi ...

Senior iOS Engineer Hybrid Fintech Impact & Growth

Lloyds Banking Group seeks a Senior Software Engineer - Mobile (iOS) in London. This role involves designing, building, and shipping high-quality features for mobile applications while collaborating with cross-functional teams. The position allows for hybrid working arrangements and requires expertise in Swif ...

Senior Golang Backend Engineer Hybrid (London)

Lloyds Banking Group is seeking a Senior Software Engineer specializing in Golang to join a dynamic team in London. In this role, you will develop, design, and architect robust Golang microservices while engaging in various engineering tasks that aim at continuous improvement. Join us for an impactful ...

Senior Data Platform Lead — Backend Architect (Python/AWS)

Aurora Energy Research in Oxford is seeking a founding Software Engineer for the Data Platforms team to build infrastructure that supports data-intensive outputs and large-scale simulations in the energy sector. The role involves managing a team, developing impactful backend systems, and ensuring high ...

Senior Civil Design Engineer Water (BIM Enabled)

ARCADIS is seeking a Senior Civil Engineer in Cambridge to lead and support wastewater and clean water projects. The role involves collaboration with clients and project stakeholders, ensuring the preparation of high-quality design documentation and drawings. The ideal candidate will have a degree in C ...

Senior Platform Driven AI Engineer for Client Solutions

Enablis in Leeds is seeking an AI Engineer to drive their AI capabilities by building production-grade solutions for clients and internal use. You'll work closely with the CTO and engineering leadership to enhance their internal AI platform, developing advanced AI tools and solutions. The ideal candida ...

Product Engineer: End to End HealthTech Impact

Stott and May is seeking a Mid-Senior Product Engineer in Greater London. This role offers the chance to shape product decisions and influence technical direction in a fast-growing, product-led HealthTech start-up. You will collaborate closely with customers, product managers, and designers, ensuring t ...

Hybrid Senior Modelling Engineer — Run Training Algorithms

A leading fitness technology firm based in Greater London is seeking a Software Engineer with expertise in Python to join their Train Team. You will be responsible for building and delivering innovative training features, leveraging data-driven approaches, and coaching fellow engineers. The role offers a competi ...

Edge Platform Engineer (C/C++/Go) – Hybrid, Benefits

IOTech Systems based in Newcastle upon Tyne is looking for a mid-level or senior software engineer to join their experienced team. You will tackle complex distributed systems problems, designing and building solutions while writing clean, production-quality code in C, C++, or Go. The role comes with a ...

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    Full Stack Software Engineer Javascript React Elixir Jobs in United Kingdom Job Search Guide, Trends and Insights