Jobs for senior software engineer- java at London

Evolve, enhance, and modernise large-scale systemsDrive adoption of technologies such as GoImprove system performance, reliability, and scalabilityDevelop automation for infrastructure deployment, monitoring, and scalingBuild tools and processes supporting continuous integration and delivery (CI/CD)Make data-guided decisions affecting core business metrics...

Job SummarySenior Software Engineer at Checkout.com will develop next‑generation payment technologies to help merchants increase acceptance rates, reduce costs, combat fraud, and create outstanding customer experiences. Working across Checkout.com’s portfolio of products, you will design, build, and maintain scalable, high‑availability systems while...

Salary: £59,000 - 99,000 per year Requirements: We are looking for a senior engineer with practical experience in high-performing engineering teams. We value advanced working knowledge of a general programming language such as Python, Java, C#, or Typescript. We value working knowledge of data management technologies such as SQL, NoSQL, or Databricks. We...

We’re building the next generation of travel and expense (T&E) technology using AI and large language models. Our mobile platform blends cutting-edge AI with strong product and UX so travelers get an intelligent companion, not just another booking app. The app should understand needs, anticipate requests, and deliver personalized help through...

About Fractile Fractile was founded in 2022 on the bet that, eventually, the world’s most capable AI systems would be limited in their impact by the time taken to produce useful outputs. We bet everything on the logical conclusion: that the only way to truly unlock this latent value, to make speed viable at scale, was to radically re-invent the hardware...

Role Overview:We are looking for a strong backend Software Engineer to join the Spacetime team and help build the next generation of our platform: orchestration of 5G Non-Terrestrial Networks (NTN) and Direct-to-Cell services, and coordination between satellite operators and terrestrial mobile networks through 3GPP- and O-RAN-aligned interfaces.Spacetime...

In order to be considered for this role, after clicking "Apply Now" above and being redirected, you must fully complete the application process on the follow-up screen.Senior C++ Software EngineerHi, I’m Steve Hardingson, Head of the “Video and Cloud” Value Stream at Hawk-Eye Innovations. Are you interested in working with the latest technologies in a...

About usEncord is the universal data layer for AI that helps 300+ AI teams train and run models on the right data. Our platform indexes, curates, annotates, and evaluates data across the full AI lifecycle, from development through production. Trusted by Woven by Toyota, AXA, UiPath, Zipline, and more.We're an ambitious team of 100+ working at the frontier of...

DescriptionJoin us to shape the future of trading technology at JPMorganChase. As a leader, you will drive impactful solutions for the Global Commodities Exotics Desk, collaborating with top talent and business partners. You’ll have the opportunity to influence strategy, deliver high-value outcomes, and foster a culture of innovation and excellence. Your...

Up to £100,000 depending on experience📍 Salary based on London. Hybrid, with flexible hours.Fanvue is one of the fastest-growing creator monetisation platforms globally. We're an AI-powered, creator-first platform helping creators connect, engage, and earn directly from their audiences at scale. Following our recent Series A, Fanvue has surpassed $200m+...

Trusted Connectivity for AI-Powered Dominance.Everfox delivers trusted connectivity to protect the world’s most critical environments and safeguard the sensitive data powering decision advantage.Built for mission-critical operations, Everfox protects what matters most by securing how data moves, how users access it, and how threats are neutralized across...

Lynx Recruitment are looking for a talented engineer to join a growing technology consultancy delivering cloud-native solutions for enterprise organisations. This role combines hands-on software engineering with technical consulting, giving you the opportunity to influence architecture, guide clients, and deliver high-quality solutions using modern Microsoft...

**Senior Software Engineer (Python) – Reducing Carbon Emissions with Machine Learning!** **Python on AWS** **£90-£110,000 per annum plus stock** **London Office - 1-2 days a week** Are you a Senior Software Engineer with a passion for working with curious, humble colleagues to build exceptional customer-focused products using Python? Do you align...

Our Mission At Carbon Re, we’re on a mission to cut gigatonnes of carbon emissions from the world’s biggest emitting industries, like cement, steel, and glass, by applying cutting‑edge AI where it matters most. We’re a small and growing team of scientists, engineers, and strategic thinkers who care deeply about impact and believe in getting there...

We've partnered with a profitable, fast-growing (10x last year) AI company building LLM-powered tools that are already used by some of the world's largest private equity and consulting firms. The team is 40+ across London & New York and this is a key backend hire for the London office.You'll own backend systems end-to-end: architecting and scaling...

A leading UK-based tech company is advancing research through innovative software solutions. The company delivers ethically sourced human data at speed, enabling academic, commercial, and AI-driven teams to generate actionable insights. With a strong engineering culture and fully remote setup, it empowers engineers to tackle complex problems and make a...

Senior Full Stack Engineer (React, Typescript, Node, AWS)HealthTech, up to £90kLondon (once or twice per fortnight in office)Troi Search are delighted to be partnering once again with this innovative & mission driven HealthTech client.We’re now looking for a Senior Full Stack Engineer who enjoys balancing hands-on coding with architectural thinking....

Hybrid (2-3 days onsite with flexibility)We’re partnering with an ambitious AI start-up developing cutting-edge behavioural biometrics technology that’s redefining digital identity, authentication and cybersecurity.This isn’t another SaaS platform.This is software sitting at the intersection of AI, cloud infrastructure, identity and security, where...

We are seeking a Senior Full Stack & Systems Engineer to join our Defence delivery team. This is a versatile, high-impact role designed for funded client delivery: you will build mission-critical web applications and API backends for central MoD programmes, while contributing to low-level system integrations (Kotlin, Android ART, IPC/AIDL) on tactical edge...

We're looking for a Senior Software Engineer to join a growing AI team and take ownership of the application and integration layer behind a new generation of AI-powered products.This is a genuinely full-stack engineering role, combining production-grade backend development, API design, AI integrations and frontend engineering. You'll work across the full...