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C# Software Engineer Fintech, Small Teams, Big Impact

A global fintech company in Glasgow is seeking a Software Engineer (C#) to design and develop backend services for their payment platform. The role emphasizes autonomy and innovation within a collaborative setting, utilizing modern development practices and tools. The ideal candidate will have 3-5 years in softw ...

Lead C&I Engineer – Low Carbon Energy (Hybrid)

A leading engineering services firm is seeking a C&I Engineer to join its Low Carbon Team in Cardiff. The role involves leading a team to develop designs for energy projects, from feasibility studies to detailed designs. Candidates should have a degree in engineering, postgraduate experience in C&I design, and s ...

Backend Software Engineer C#/.NET, SQL (London Onsite)

A leading technology firm in London seeks a Backend Software Engineer with expertise in C# .NET and SQL. Join a collaborative team to develop algorithmic trading systems, ensuring high performance and scalability. Ideal candidates will have a strong academic record, advanced programming skills, and a thorough un ...

Senior Backend Engineer C#/NET, SQL Server, APIs

A leading tech recruitment firm is seeking a Senior Back-End Developer in Manchester to enhance their capabilities in delivering SaaS products. Responsibilities include contributing to the full development lifecycle and utilizing expertise in C#, .NET, and SQL Server. Join a friendly, forward-thinking team that ...

Mobile HVAC & A/C Engineer — Field Service & Chillers

A leading HVAC service company in Greater London seeks an experienced Air Conditioning service engineer. The role involves fault diagnostics, installations, and ensuring customer satisfaction while adhering to safety protocols. Candidates must have a minimum of 2 years of field-based experience, a full driving l ...

Lead C&I Engineer – Low Carbon Energy (Hybrid)

A leading engineering firm in the UK is seeking a C&I Engineer for its Low Carbon Team. The role involves leading a team in developing innovative designs across various energy projects. The ideal candidate will have a degree in engineering and relevant experience in C&I design. The firm values inclusivity and of ...

Senior C# .NET Backend Engineer Sports Trading (London)

A global Sports Trading company is seeking a Backend Software Engineer (C# .Net) based in London. This full-time position offers a salary up to £150k plus bonuses based on performance. The ideal candidate should have strong expertise in C# and ASP.Net, along with a solid understanding of databases and computer s ...

Mobile A/C Engineer – Regional Service with Vehicle

A well-established facilities provider in Leicester is seeking a Mobile Air Conditioning Engineer to manage service and maintenance for commercial systems. The ideal candidate will have proven experience in fault-finding and repairing air conditioning systems and be comfortable working independently. Responsibil ...

Hybrid Backend Engineer (C++, Rust) Low Latency Trading

A leading trading firm in Greater London is seeking a skilled Backend Software Engineer to develop high throughput low-latency backend services using C++ and Rust for trading engines. You'll be part of a collaborative team with opportunities for remote work, a salary up to £180k, and performance-based bonuses. I ...

Senior Embedded Software Engineer – Hybrid (C/Ada/Rust)

A leading defence technology firm in Northampton is seeking a Senior Embedded Software Engineer to work on a contract basis. The candidate will engage in the full development lifecycle, including software development and verification. Experience with procedural programming languages like C, Ada, or Rust, along w ...

Senior P&C Design Engineer—Substations (Remote/Flexible)

A leading engineering firm in the UK seeks a Principal P&C Design Engineer to join their Power T&D team. The role involves engineering control designs for electrical substation projects up to 400 kV, along with planning, procurement, and design responsibilities. Candidates will benefit from a flexible working po ...

Functional Safety C&I Engineer — EPC Project Leader

A leading engineering firm seeks an experienced C&I Engineer in Warrington for pivotal roles in delivering high-quality design across complex projects. You'll engage in various stages from concept through to commissioning, focusing on sectors including Oil & Gas, Nuclear, and Utilities. The ideal candidate has a ...

Lead Software Engineer Cross Platform C++ & POS Systems

A leading software development company in Reading is looking for a Lead Software Engineer for the Client Adapter team. This role entails leading the development of cross-platform technology, providing technical mentorship, and shaping the technical roadmap. Ideal candidates will have over 5 years of C++ experien ...

ROV Software Test Engineer — C#, WinForms & Unit Testing

A technology company specializing in underwater robotics is seeking a developer to join their Edinburgh team. This role involves improving and maintaining applications for controlling ROVs, focusing on unit testing and collaboration with hardware teams. Candidates should have a degree in computer science, and st ...

Senior C&I Engineer: Shape Fusion Power & Operations

A leading energy organization in Culham is seeking a Senior C&I Engineer to enhance the future of fusion energy. In this pivotal role, you will manage control and instrumentation systems, overseeing maintenance and upgrades critical to operations. Candidates should possess a degree in Electrical/C&I Engineering, ...

Senior C++ Software Engineer – Front‑Office Trading Engines

A leading global financial services firm in London is seeking a Software Engineer III - C++ Senior Associate to enhance and deliver innovative technology products within an agile team. The role requires advanced expertise in C++ programming and involvement across the software development cycle. Successful candid ...

Senior Software Engineer (C#/F#) Hybrid, Scalable FinTech

A fast-growing financial services organization is seeking Software Engineers to join their team in Cheadle Hulme. The role involves designing, developing, and maintaining robust systems using F# and Vue.js. Ideal candidates will have 5+ years of software development experience, strong C# proficiency, and a willi ...

Rust/C++ Backend Engineer for Scalable, Reliable Systems

A cutting-edge AI company in the UK seeks a Backend Engineer with expertise in Rust or C++. The role involves working on production systems to ensure reliability and scalability. Candidates should have strong knowledge of distributed systems and service observability. The position offers a comprehensive benefits ...

C++ Software Engineer 3D Reality Capture & Point Cloud

A leading industrial technology company in the UK is looking for a C++ Software Engineer to develop advanced features for a point cloud extension used globally. The role requires strong expertise in C++ and domains like Computer Vision or Image Processing. Collaborate with teams to innovate and translate complex ...

Senior QA Test Engineer C# API Azure SaaS

6 days ago Be among the first 25 applicants This range is provided by Client Server. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base pay range Direct message the job poster from Client Server Senior QA Test Eng ...

Senior C# Engineer for Low Latency Trading Platform

A leading financial institution in the United Kingdom is seeking a Senior C# Developer to lead the design, development, and support of low-latency pricing and execution platforms for front-office trading teams. The ideal candidate will collaborate closely with quantitative teams, traders, and technology stakehol ...

Senior C++ Software Engineer Ultra Low Latency Trading

We are partnering with a leading technology‑driven market‑making firm that builds some of the fastest and most sophisticated trading systems in the world. Their engineering culture is deeply centred around modern C++, low‑latency performance, and large‑scale distributed system design. You'll join a sma ...

C++ Software Engineer — Real Time Motion Capture (Contract)

A leading motion capture technology firm in Yarnton seeks a Software Engineer to develop core application software and design APIs. Candidates should have expertise in modern C++, strong analytical skills, and experience with substantial software systems. The role offers a competitive salary, 25 days of annual l ...

Software Integrations Engineer (C#/SQL) – On‑Site UK

A leading automation solutions provider in Nottingham seeks a Software Integrations Engineer. In this full-time role, you will develop integrations for automation platforms while enhancing legacy systems. The position requires proficiency in C, C# .NET, and SQL, alongside strong communication skills and customer ...

Low Latency C++ Engineer for High Performance Trading

A leading tech-driven trading firm is seeking an exceptional C++ Developer to drive the development and optimization of their high-performance trading systems. The ideal candidate will possess expert-level C++ skills, experience in building low-latency systems, and a strong understanding of networking protocols. ...

Low Latency C#/.NET Front Office Tech Engineer

A tech-native consultancy in the UK seeks an experienced C# / .NET Developer for their Front Office, specializing in real-time and low-latency trading systems. Candidates should have a strong background in performance-sensitive environments and be able to design and implement efficient applications. This role em ...

Senior QA Test Engineer C# API Performance Testing

Senior QA Test Engineer C# API Performance Testing Senior QA Test Engineer C# API Performance Testing 1 week ago Be among the first 25 applicants This range is provided by Client Server. Your actual pay will be based on your skills and experience — talk with your recruiter to learn mo ...

Senior Substation P&C Design Engineer (Hybrid/Remote)

A leading global engineering firm is seeking a Senior Electrical Engineer in Epsom to lead design projects related to electricity transmission and distribution. This role offers opportunities for personal development and aims to drive the transition to Net Zero. You will collaborate with clients and multidiscipl ...

Impact Software Engineer — Build Critical Systems (Rust/C++)

A leading AI development firm in Greater London is looking for exceptional software engineers to work on their most critical product and technical challenges. Candidates should take pride in their work, thrive in a meritocratic environment, and have strong communication skills. The interview process includes cod ...

Onsite Full Stack Engineer (Java/C++) • DevOps Ready

Ncounter is seeking a Full Stack Software Engineer for their Cheltenham office. The role focuses on building resilient systems combining backend expertise in Java or C++, and modern frontend capabilities in JavaScript. Candidates should possess a strong understanding of software engineering best practices includ ...

Secure Full‑Lifecycle C# Engineer — Onsite Reading, Equity

CGI is seeking a C# Developer to play a pivotal role in building secure, high-impact applications in their Reading office. You will be involved in the complete application lifecycle and provide 4th line support to ensure high-performing systems. The position is full-time, onsite, and requires UK sole nationality ...

Remote C&I Control Systems Engineer Energy Projects

Mane Energy is looking for an experienced Control & Instrumentation (C&I) Engineer to contribute to major energy sector projects. This role involves developing control narratives and system architectures, alongside hands-on system configuration and optimisation tasks. Ideal candidates will have proven experience ...

Remote C&I Control Systems Engineer Energy Projects

Mane Energy is looking for an experienced Control & Instrumentation (C&I) Engineer to contribute to major energy sector projects. This role involves developing control narratives and system architectures, alongside hands-on system configuration and optimisation tasks. Ideal candidates will have proven experience ...

I&C Engineer III Substations & EPC Power Projects

ITAC Solutions is looking for a skilled engineer in Birmingham, United Kingdom to manage high-impact EPC projects in substations, renewables, and energy delivery systems. This role involves developing designs for control panels and instrumentation systems, collaborating across various engineering teams, and ensu ...

Remote C&I Control Systems Engineer Energy Projects

Mane Energy is looking for an experienced Control & Instrumentation (C&I) Engineer to contribute to major energy sector projects. This role involves developing control narratives and system architectures, alongside hands-on system configuration and optimisation tasks. Ideal candidates will have proven experience ...

Remote C&I Control Systems Engineer Energy Projects

Mane Energy is looking for an experienced Control & Instrumentation (C&I) Engineer to contribute to major energy sector projects. This role involves developing control narratives and system architectures, alongside hands-on system configuration and optimisation tasks. Ideal candidates will have proven experience ...

Lead Engineer C&I Functional Design (Safety Systems)

Lead Engineer - C&I Functional Design (Safety Systems) page is loaded## Lead Engineer - C&I Functional Design (Safety Systems)locations: Derby, UK: Derby: Warringtontime type: Full timeposted on: Posted 2 Days Agotime left to apply: End Date: May 31, 2026 (27 days left to apply)job requisition id: ...

Lead Engineer, C&I Functional Design – Safety Systems

Rolls Royce SMR Ltd. is seeking a Lead Engineer for C&I Functional Design in Derby, UK. This role involves defining functional specifications for nuclear safety systems and leading design efforts during engineering phases. Key responsibilities include ensuring compliance with IEC standards, mentoring junior engi ...

C#.NET Cloud Software Engineer – CI/CD & IaC

DFDS UK & Ireland in Grimsby is looking for a skilled Software Engineer to design and develop high-performing software solutions. This role involves utilizing C#.NET and cloud-native technologies within an Agile team, managing infrastructure as code, and optimizing CI/CD pipelines. Candidates should have a stron ...

Senior C++ Engineer — Low Latency Trading (Hybrid UK)

IC Resources is seeking a Senior C++ Software Engineer to join a leading technology firm in Cambridge. You will design and develop C++ software on Linux OS for low-latency trading systems that integrate custom silicon with advanced software. The role offers a hybrid working model, requiring you to be onsite 3 da ...

Commercial HVAC Field Engineer – A/C & VRV Specialist

TXM Recruit in Maidstone is seeking an experienced Air Conditioning Engineer to maintain and service commercial HVAC systems. The role offers a salary of £48,812 per year, plus additional benefits such as 25 days of holiday, an average bonus of 4%, and funding for training. Candidates must have a Full UK License ...

Backend C# Engineer for Mission Critical Systems (Remote)

Motorola Solutions in Glasgow is looking for a Software Engineer to join our agile team, focusing on backend development using C# and .NET. Candidates should have at least 3 years of software development experience and be capable of obtaining NPPV3 clearance. This primarily remote role offers a competitive salar ...

Senior C++ Engineer for AI Hardware & Compiler Tech

A leading AI startup in London is looking for a C++ Developer to design and build cutting-edge software and compiler frameworks for AI models. You will collaborate closely with hardware engineers to ensure seamless interaction between custom processors and platforms. The ideal candidate has proven expertise in C ...

Mobile HVAC Engineer VRV/VRF & Commercial A/C

A reputable engineering recruitment company in Manchester is seeking an experienced HVAC Engineer to perform maintenance and service tasks across various sites, including gyms and offices. The role offers a salary between £38,000 and £52,000, plus travel and overtime benefits. Candidates should have strong troub ...

Junior C#/.NET Engineer — Financial Services, Hybrid London

SGI is seeking a Junior Software Developer to join their growing technology team in London with hybrid working arrangements. The ideal candidate will have approximately 2 years of experience with C#/.NET and SQL Server, contributing to system development and enhancements applied across financial services. You wi ...

Junior Software Engineer | C#/.NET | Financial Services, | London

Junior Software Engineer | C#/.NET | Financial Services, | London We’re looking for a Junior Software Developer to join a growing technology team within a fast‑paced, regulated financial services environment. This is a great opportunity for someone early in their career who ...

A/C Project Engineer Manchester | Hybrid, Car & Bonus

A leading HVAC firm in Manchester is seeking an experienced Air Conditioning Project Engineer. This role involves managing projects from order through to completion, including scheduling, resource management, and client communication. Candidates should have a strong background in air conditioning systems, specif ...

Senior Full Stack UI Engineer (C#/WPF) – Hybrid

Citi is seeking a development role for the User Interface in their Equities Technology team, located in Belfast. The ideal candidate will provide technical direction, conduct code reviews, and resolve complex problems using agile methodologies. The position requires extensive development experience, with skills ...

Senior C++ Engineer — Low Latency Trading Systems (Hybrid)

Miller Maxwell Ltd, an international electronic trading organization, is looking for a Senior C++ Software Engineer. This role offers a chance to join a high-performance engineering team working on cutting-edge trading infrastructure. Applicants should have at least five years of experience in C++ development wi ...

Lead Software Engineer: C#/.NET for Trading Platform

Caxton Associates LP. is looking for an experienced Software Engineer to lead a team in London. This hands-on leadership role involves designing scalable systems, owning delivery across projects, and mentoring engineers. Candidates should have over 8 years of experience with C#, .NET, and other technologies. Str ...

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    Fullstack Engineer C Python React Data Management Jobs in United Kingdom Job Search Guide, Trends and Insights