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Remote AI Code Reviewer & Systems Evaluator (Contract)

Lifted, an Upwork Company™ is seeking a Copy of AI Code Reviewer & Systems Evaluation Engineer 1. This remote role involves improving AI systems through human feedback, focusing on systems evaluation and performance optimization. Candidates should have over 2 years of experience in backend engineering or AI auto ...

Staff Product Engineer — Fintech AI Accounting Platform

Artifact AI Ltd is looking for a senior backend engineer in Greater London to lead development in a fast-paced environment. The role entails owning significant components of the accounting software, working with Python, and possibly other technologies like Go, Rust, and TypeScript. Ideal candidates will possess ...

SRE Engineer Cloud Reliability & Automation

A leading graph intelligence platform in London is looking for a Software Engineer in Site Reliability Engineering. The role focuses on automating processes for reliability across a vast cloud infrastructure. Candidates should have strong backend experience, particularly in Go, and demonstrate a solid understand ...

Payments Platform Principal Engineer — Scale & Architecture

A cross-border payments company is seeking a Principal Software Engineer to design and build scalable applications and APIs. The role involves working across the full stack, mentoring junior team members, and contributing to architecture decisions. Ideal candidates should have strong system design and API skills ...

GenAI Full Stack Engineer — Hybrid London

83zero is seeking GenAI Full Stack Engineers for hybrid positions based in London. In this role, you will design, build, and scale AI applications while working throughout the full development lifecycle. The ideal candidate will have strong backend experience with Python or TypeScript and familiarity with Genera ...

Senior Full Stack Engineer: Ground Floor AI Platform Lead

RGH-Global Ltd is seeking a Senior Full-Stack Software Engineer for a pivotal greenfield project in London. The position involves building a customer-facing platform, backend automation, and architecting technical foundations from the ground up. Ideal candidates will have over 5 years of experience, strong skill ...

Hybrid Full Stack Engineer II – London

Ziff Davis, LLC is seeking a Software Engineer II to join their Engineering team in London. This hybrid role involves collaborating with a squad of over 25 engineers to deliver exceptional user experiences for 8 million monthly visitors. The position requires at least 4 years of backend development experience, p ...

GenAI Full Stack Engineer — Hybrid London

83zero Ltd is seeking a GenAI Full Stack Engineer to design and develop AI powered applications and full stack solutions. The role involves working on cutting-edge technology in a hybrid environment with 2 days per week in the office. Candidates should possess backend development skills in Python or TypeScript, ...

Graduate Software Engineer — Hybrid, Cloud & FinTech

A fast-growing FinTech company in Central London is seeking a Graduate Software Engineer to join their engineering team during an exciting scale-up phase. The role involves building backend services in C#, contributing to frontend development, and collaborating with various teams. Candidates should have foundati ...

Senior Rails Engineer — AI Health Platform (Flexible Hours)

Thriva is looking for a Senior Rails Engineer to join their impactful product team in London. The ideal candidate will have over 5 years of experience in backend systems, particularly with Ruby on Rails and microservices. You will collaborate closely with engineers, designers, and product managers to build meani ...

Senior C#/.NET Engineer — Trading Systems & Data Platforms

Kite Consulting Group is seeking an experienced C# / .NET Engineer to join their Back Office IT team in Central London. The role involves hands-on development, enhancing trading applications, and contributing to a broader data platform transformation. Candidates should have 5–10 years of experience in backend/se ...

Founding Lead Engineer, Agentic SRE — London

A leading tech company is seeking a Founding Lead Engineer to architect and build the core alert investigation pipeline in London. Candidates should have 5+ years of professional software engineering experience with proven product delivery capabilities. This role emphasizes backend systems and the opportunity to ...

Remote Elixir Software Engineer (LiveView & TDD)

A growing marketing technology firm in the UK is seeking an Elixir Software Engineer. The successful candidate will join a collaborative team focused on using Elixir and LiveView to tackle real-world marketing challenges. The role allows for remote work with opportunities to excel in a flexible environment. Appl ...

Senior Full Stack Engineer – Remote Ready Vinyl Tech

A leading technology company in Greater London is looking for a Senior Full Stack Engineer to transform the music industry. In this role, you will leverage your PHP and JavaScript/TypeScript expertise to develop APIs and backend services. Collaborating with cross-functional teams, you will create reliable and sc ...

Founding Full Stack Engineer: Build Impactful AI Tools

A dynamic InsurTech startup is seeking a Full Stack Engineer to develop a leading AI platform. You will focus on frontend development with TypeScript while contributing to backend services. The role emphasizes product ownership and fast-paced problem-solving in a collaborative environment. Ideal candidates will ...

Principal Full Stack Engineer — Lead Cloud Native Solutions

A tech company in London is seeking a Principal Full Stack Software Engineer to lead the design, development, and delivery of modern, scalable applications. This senior role involves shaping technical direction, mentoring engineers, and implementing best practices across the software development lifecycle. Ideal ...

Senior Full Stack Engineer

Senior Fullstack Software Engineer Location: London (3 days in the office) Contract Type: Permanent Salary: Up to £100,000 (DOE) Build end-to-end features across a modern t ...

Application Security Engineer

Overview Hello! We're Teya. Teya is a payment and software service provider, headquartered in London serving small, local businesses across Europe. Founded in 2019, we build easy to use, integrated tools that enable our members to accept payments and boost business performance. </ ...

Senior Full Stack Engineer

Senior Full Stack Developer Reporting to: Engineering Manager Office Environment: Hybrid (minimum two days per week) Type: Full time, permanent Join Our Mission Skip the queue. Shape the future. See real impact. At QuantSpark, we're transforming how data ...

Senior Rust Engineer Payments

Overview Join Proton and build a better internet where privacy is the default. At Proton, we believe that privacy is a fundamental human right and the cornerstone of democracy. Since 2014, we have provided free and open-source technology to millions worldwide, ensuring access to privacy, security, ...

Lead Engineer

* Lead-Level Experience: 6+ years in backend development, with a proven track record in a Senior, Lead, or equivalent role where you have moved beyond individual tasks to drive the technical roadmap and operational excellence of critical sub-systems or service portfolios.* Node.js Ecosystem Mastery: Deep technic ...

Lead & Staff JavaScript Engineers | Full Stack | Hyper Growth Fintech & Tech for Good | Typescr[...]

Overview We're supporting a hyper-growth fintech client that is also tech-for-good. They’ve got big hiring plans for the year and are currently looking for Senior, Lead, Staff & Principal Full Stack Engineers to join the team. You’ll be working with Typescript, React.js, Node.js, Next.js & more, ...

Software Engineer

Software Engineer – Real‑Time Python Systems (Front Office) A leading global investment bank is growing a front‑office engineering team responsible for building and owning high‑performance, real‑time systems used directly in live environments. This ...

Platform Engineer (Data)

We’re hiring a Platform Engineer to join a growing Technology & Innovation team within a well-established corporate finance business. This role is primarily focused on cloud infrastructure, deployment, and platform reliability , supporting the build-out of a greenfield analytics and ...

Senior Android Engineer, Full Stack, Generative AI, 8 Millions Users, | Greenfield | Up to £120[...]

Senior Android Engineer – Full Stack, Generative AI Location: London, United Kingdom | Old Street | Hybrid, 4 days per week in the office Salary: Up to £120,000 base salary + equity Company: Owen Thomas | Pending B Corp – exclusive partnership with a rapidly scaling social media plat ...

Senior Integration Engineer

We are seeking a Senior Integration Engineer to design and build scalable, enterprise‑grade UI systems using Blazor integrated with .NET APIs . This role focuses on owning the UI and integration layer within a modern microservices architecture, ensuring performance, scalability, and excellen ...

Platform Engineer at Saturnos.com

Job Title Platform Engineer Company Description Saturnos.com - Series A, YC-backed AI fintech Job Description Join a high-caliber engineering team from Cred and Postman building the AI-native operating system for the £100B+ financial advice industry. You will d ...

Full Stack Engineer

Overview Having been in business for eight years & risen to the top of their sector, this company are going through an exciting period of growth! The product is aimed at sole traders & helps them to essentially run & scale their business from one central hub – their app. They operate on a hybrid m ...

Senior Software Engineer

(Python, NodeJS or TypeScript, with React and ideally some AI engineering) Summary This is an exciting team of smart and kind engineers -- and they index for both when hiring. They’re looking for a Senior Software Engineer who can ideally work up and down the stack; the technologies and l ...

Full Stack Engineer

trg are partnered with a data platform and insights provider used by major global brands to navigate and engage virtual worlds. They are a start up with ambitious growth plans over the next 24 months, fostering a culture of collaboration and innovation where every idea is valued. The Engineering tea ...

Full Stack Engineer

Senior Full Stack Engineer (TypeScript leaning) | London (Hybrid) We’re working with a high-growth, AI-first fintech that’s quietly building something pretty special and now looking to add a Senior Full Stack Engineer to their team. This isn’t your typical “we use AI” environment. Engineeri ...

MacOS Engineer

Job Details:6 months (likely to extend)2 Days Onsite in Central LondonOutside IR35SC Clearance RequiredPosition Overview:The MacOS Engineer will be responsible for the development, deployment, ...

MacOS Engineer

Job Details:6 months (likely to extend)2 Days Onsite in Central LondonOutside IR35SC Clearance RequiredPosition Overview:The MacOS Engineer will be responsible for the development, deployment, ...

UX Designer Amazon Developer, Alexa Device Applications, Devices Experience Design

Amazon Developer is seeking a talented UX Designer to help shape the developer experience for building and submitting applications for Alexa devices. This role requires a strong foundation in user-centered design, technical understanding, and problem-solving skills to create intuitive workflows that empower deve ...

Lead Software Engineer Margin Technology Vice President

Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build ...

Senior Software Engineer Business Expense Management

Company Description Wise is a global technology company, building the best way to move and manage the world’s money. Min fees. Max ease. Full speed. Whether people and businesses are sending money to another country, spending abroad, or making and receiving international payment ...

Software Engineer Embedded Finance

Company Description Wise is a global technology company, building the best way to move and manage the world’s money. Min fees. Max ease. Full speed. Whether people and businesses are sending money to another country, spending abroad, or making and receiving international pay ...

Software Engineer Embedded Finance

Company Description Wise is a global technology company, building the best way to move and manage the world’s money. Min fees. Max ease. Full speed. Whether people and businesses are sending money to another country, spending abroad, or making and receiving international pay ...

Software Engineer Business Onboarding

Company Description Wise is a global technology company, building the best way to move and manage the world’s money. Min fees. Max ease. Full speed. Whether people and businesses are sending money to another country, spending abroad, or making and receiving int ...

Software Engineer Business Onboarding

Company Description Wise is a global technology company, building the best way to move and manage the world’s money. Min fees. Max ease. Full speed. Whether people and businesses are sending money to another country, spending abroad, or making and receiving int ...

Senior Software Engineer II Data Engineering

Senior Software Engineer II – Data Engineering Are you passionate about designing scalable data solutions?Do you thrive on transforming complex datasets into reliable, high‑impact systems? About the team: Our team is dedicated to unlocking ...

Senior Engineer (Full Stack)

The TP ICAP Group is a world leading provider of market infrastructure.Our purpose is to provide clients with access to global financial and commodities markets, improving price discovery, liquidity, and distribution of data, through responsible and innovative solutions.Through our people and technology, we conn ...

Software Engineer (Full Stack)

The TP ICAP Group is a world leading provider of market infrastructure.Our purpose is to provide clients with access to global financial and commodities markets, improving price discovery, liquidity, and distribution of data, through responsible and innovative solutions.Through our people and technology, we conn ...

Software Architect

Level Up Your Career with Zynga! At Zynga, we bring people together through the power of play. As a global leader in interactive entertainment and a proud label of Take‑Two Interactive, our games have been downloaded over 6 billion times—connecting players in 175+ countries through fun, strategy, and a lit ...

Senior Software Engineer II Data Engineering

## .**About the team:**Our team is dedicated to unlocking the rich knowledge embedded within Elsevier’s content through our rich data platform; this empowers researchers, clinicians, and innovators worldwide to gain new insights, make informed decisions, and accelerate progress across research, healthcare, and ...

Software Team Lead

Worker Type: Employee Application End Date: We are using and creating technology to transform operations at sea to enable people and the planet to thrive. We are open-minded and fearless in our approach to innovation and don't believe in boundaries. We challenge everything and have massiv ...

AI Native Software Engineer

<div> <div> <div> <div>Overview: <br /> </div> <div>TekWissen Group is a workforce management provider throughout the UK, Europe and many other countries in the world. The client below is a global professional services compa ...

AI Native Software Engineer

<div> <div> <div> <div>Overview: <br /> </div> <div>TekWissen Group is a workforce management provider throughout the UK, Europe and many other countries in the world. The client below is a global professional services compa ...

Mid Senior Ruby on Rails Engineer (B2B SaaS | Hybrid | UK)

B2B SaaS | Hybrid – 2-3 days office | UK Location: London Type: Full-time Role Overview Accessible rail travel depends on systems that work reliably in live environments. Our Passenger ...

AI Systems Engineer — Production Grade LLMs & RAG

SLR Consulting is looking for an AI Development Engineer to design and implement production-grade AI systems. The role requires strong backend engineering skills, proficiency in Python, and experience with large language models. Responsibilities include building retrieval pipelines, knowledge indexing, and deplo ...

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