13 of 13 Backend Developer Jobs in Slough

potential. Our solutions include intelligent payment routing, customized financial products, Banking as a Service (BaaS), and secure global payouts. Role Description As a Senior Backend Developer for Payomatix Technologies, you will play a critical role in designing and implementing back-end infrastructure for our fintech and payment orchestration … platforms. Responsibilities include developing scalable APIs, optimizing database performance, designing microservices, integrating various payment processors, and ensuring the reliability and security of our backend systems. You will collaborate closely with cross-functional teams to deliver cutting-edge solutions in high-risk payments, iGaming, and fintech. This is a full ...

Leading Backend Developer – AI Security Startup About the Company We are partnered with a fast‐growing, venture‐backed AI startup building next‐generation video intelligence technology. Our platform helps organisations extract real value from their video data, faster, smarter, and with far less manual effort. They've secured … scale. The founding team consists of experienced technologists and entrepreneurs with deep backgrounds in advanced robotics, AI, and large‐scale systems. The Role: Leading Backend Engineer We're looking for a highly capable Leading Backend Engineer to become a key contributor within our core engineering team. ...

Senior Backend Engineer London (Hybrid) Early-Stage | AI Platform | Enterprise-Grade Systems We're partnering with an ambitious early-stage AI company building a challenge-based interview intelligence platform. The product replaces CV-noise with real signal — evidence from real work and real human capability. They're in full … build mode toward launch. Small team. High standards. High ownership. No corporate theatre. They're hiring a Senior Backend Engineer to build the enterprise backbone of the platform — high-concurrency APIs, event-driven systems, and reliability foundations that transform complex hiring inputs into secure, trusted, GDPR-safe outputs. ...

Senior DotNet Backend Developer – WealthTech SaaS Platform – London, UK – 6 Month Contract (Outside IR35) A global wealth management technology provider is seeking multiple DotNet Backend Developers to contribute to its core enterprise SaaS platform used by private banks and wealth management firms. We're looking for developers … wealth management. Backed Development Work across the full software development lifecycle (SDLC), from requirement gathering to testing and deployment Design and develop robust backend services using .NET Core/C# Build and maintain scalable RESTful APIs and collaborate with front-end developers on UI integration Develop and maintain Azure ...

Senior Backend Engineer, London, £60,000 - £75,000 + Benefits A Senior Backend Engineer is needed to join an ambitious and fast-scaling technology company operating within a regulated market. This role is based in central London 4 days a week on-site. As their product suite evolves … customer demand increases, they are investing in senior engineering talent to strengthen backend capability and long-term platform resilience. This hire is central to that journey, offering meaningful equity and the opportunity to influence architectural decisions at a critical stage of growth. The Senior Backend Engineer (Full Stack ...

data scientists and chemists. All positions at CheMastery come with an extraordinary level of freedom to showcase your skill. Description The position as a Backend Python Developer is a permanent full-time position. As a Python Developer you will have be part of a brilliant software ...

financial‐industry clients is looking for a Senior Backend Developer to join their team. You'd be contributing to a new proof‐of‐concept initiative built on their enablement platform, specifically focused on bringing self‐executing smart‐contract capabilities into the loans portfolio. It's a high‐impact … days a week. We are looking for: Experience with smart contract development using Solidity, EVM chains, and Ethereum‐based technologies Strong backend engineering expertise Background in finance or crypto environments Bonus skills: Core/Advanced Java, J2EE, Spring Boot, REST APIs, CI/CD understanding, Agile experience, Angular ...

Cloud Backend Engineer (Python/AWS/Kubernetes) London (Hybrid) ASAP - End May Competitive Day Rate – Outside IR35 We're supporting a highly PE-backed Professional Services organisation building cloud-native, AI-enabled applications within tax advisory. This is a hands-on engineering role sitting within a cross-functional … delivery squad. You'll be building backend APIs and deploying them into a modern AWS + Kubernetes environment. The Role • Building backend APIs in Python (FastAPI ideally) • Working with PostgreSQL • Deploying services into AWS (EKS preferred) • Managing container workloads in Kubernetes • Building infrastructure with Terraform • Implementing CI/ ...

Back-End Developer (Go) Location: London (2 days onsite) Contract: 12 Months (Extension Possible) Experience: 3–5+ Years About the Role We are looking for an experienced Back-End Developer with strong expertise in Go (Golang) to build scalable, high-performance backend systems. You will design APIs … deployed on AWS cloud infrastructure. This role is ideal for someone passionate about data-driven systems, cloud-native architecture, and performance optimization. Key Responsibilities Backend Development Develop and maintain scalable backend services using Go (Golang). Design and implement RESTful APIs and GraphQL endpoints. Build APIs for data ...

Senior Backend Engineer | Digital Payments | FinTech | Hybrid/Remote | £90k Company Overview: A fast-growing global FinTech company building modern, on-chain financial infrastructure for payments, banking, and investments across 140+ countries. Role: We're hiring a Senior Backend Engineer to join a Digital Payments team working … high-scale systems that integrate with global bank networks, card schemes, and modern payment methods. You'll own core backend services, influence architecture, and help move millions in daily transactions. Requirements: • 5+ years backend engineering experience. • Strong JavaScript/TypeScript/NodeJS expertise. • Experience with microservices, REST APIs ...

Senior Backend Engineer £80,000 – £110,000 | London (Hybrid – 3 days in office) The Opportunity We're partnered with a scaling, venture-backed SaaS business delivering a mobile-first platform used by large distributed workforces across global enterprise organisations. This is not greenfield development and it's not legacy … with strong product traction, enterprise customers, and continued platform evolution across both technical and commercial areas. You'll be joining an organisation solving complex backend and platform engineering challenges at scale, supporting a product that is already widely adopted while helping shape its future architecture. The Product The platform ...

Role: Senior Python Backend Engineer Location: London King's Cross - full time on site Salary: up to £200k base + equity We are partnered with a high-growth AI-driven platform that helps large enterprises automate complex, data-heavy workflows. The company is well-funded with. over $90M from … scaling rapidly, and already working with globally recognised organisations in a highly regulated environment. The Role As a Senior Backend Engineer, you'll help design and scale the backend systems behind a sophisticated AI platform. You'll work on high-performance services, complex data pipelines, and secure infrastructure ...

Senior Backend Engineer – Remote first, London office (UK) £65k–£75k | Full-time, 4-day work week I'm working with an exciting client who is looking for a Senior Backend Engineer to join their mission-driven team transforming frontline public services with AI. This is a unique opportunity … well being and justice, reduce admin, improve compliance, and spend more time on meaningful human work. What You'll Do: Build and scale core backend systems, APIs, data pipelines, and integrations Collaborate with CTO, product, and design teams to deliver tools used by real frontline workers Write maintainable, tested ...