Last updated: 2025-11-09
102 Backend Software Engineering jobs in London.
Fortinet
Join Fortinet, a cybersecurity pioneer with over two decades of excellence, as we continue to shape the future of cybersecurity and redefine the intersection o…
London
- Skills: Cybersecurity, Data Loss Protection, Machine Learning, Statistical Analysis, Behavioral Analytics, Go, Starlark, Regular Expressions, PostgreSQL, REST APIs
- Level: mid
- Type: full_time
Tessl
Tessl is a Series A startup based in London, focused on AI Native Development, providing a platform that transforms how software is created and maintained.
London
- Skills: AI Native Development, real-time workflows, software engineering, code generation, REST APIs, CI pipelines, Kubernetes, tooling, programming languages, autonomy
- Level: senior
- Type: full_time
Flowdesk
Flowdesk's mission is to build a global financial institution for digital assets, one designed from the ground up for market integrity and efficiency.
London
- Skills: DeFi, crypto, blockchain, integration, API design, Typescript, Python, Postgres, cloud environments, CI/CD
- Level: mid
- Type: full_time
Encord
At Encord, we're building the AI infrastructure of the future. One of the biggest challenges AI companies face today is data quality. The success of any AI app…
London
- Skills: Python, Typescript, React, Kubernetes, GCP, Machine Learning, PyTorch, CUDA, Ray, Computer Vision
- Level: mid
- Type: full_time
Improbable
At Improbable, we believe that the next revolution in entertainment and society will come from massive virtual worlds. They will create new economies and oppor…
London
- Skills: cloud services, web apps, prototyping, TypeScript, Python, Go, infrastructure-as-code, Terraform, AWS, GCP
- Level: mid
- Type: full_time
UW
Hi! We're UW. We’re on a mission to take the headache out of utilities by providing them all in one place. One bill for energy, broadband, mobile and insurance…
London
- Skills: Golang, Kafka, PostgreSQL, AWS, Terraform, microservices, event-sourced architecture, data products, Kubernetes, CRM
- Level: mid
- Type: full_time
Vercel
Vercel gives developers the tools and cloud infrastructure to build, scale, and secure a faster, more personalized web. As the team behind v0, Next.js, and AI …
London
- Skills: CI/CD, micro-services, distributed systems, containerisation, JavaScript, TypeScript, Go, build pipeline, developer experience, open-source
- Level: senior
- Type: full_time
Pleo
Pleo is a company on a mission to revolutionise the way businesses manage company spending. They create tools that promote autonomy and trust, simplifying the …
London
- Skills: Kotlin, distributed systems, microservices, AWS, Kubernetes, PostgreSQL, JUnit, Testcontainers, observability, collaboration
- Level: mid
- Type: full_time
Monzo
We're on a mission to make money work for everyone. We’re waving goodbye to the complicated and confusing ways of traditional banking.
London
- Skills: Go, Cassandra, Kafka, Kubernetes, Docker, AWS, GCP, React, Kotlin, Swift
- Level: intern
- Type: internship
XTX Markets
XTX Markets is a leading algorithmic trading firm which uses state-of-the-art machine learning technology to produce price forecasts for over 50,000 financial …
London
- Skills: algorithmic trading, machine learning, HPC cluster, distributed systems, Golang, Rust, Python, data structures, performance optimization, scalability
- Level: senior
- Type: full_time
Cloudflare
At Cloudflare, we are on a mission to help build a better Internet. Today the company runs one of the world’s largest networks that powers millions of websites…
London
- Skills: distributed systems, software applications, machine learning, Rust, TypeScript, Go, data structures, algorithms, API design, performance optimization
- Level: senior
- Type: full_time
Cogna
Cogna was founded to change this. Our mission is to give critical industries their own AI-powered Software Factory: a way to build and deploy bespoke digital t…
London
- Skills: AI-powered Software Factory, Engineering culture, High-impact projects, Modern typed Python, Go, Frontend development, Docker, PostgreSQL, Large codebases, LLM toolchains
- Level: mid
- Type: full_time
Sony Interactive Entertainment
Sony Interactive Entertainment is a wholly-owned subsidiary of Sony Group Corporation, recognized as a global leader in entertainment producing The PlayStation…
London
- Skills: full-stack engineering, API development, Python, Go, Node.js, REST, GraphQL, OAuth, cloud-native services, agile environments
- Level: senior
- Type: full_time
hyperexponential
At hyperexponential, we're building the AI-powered platform that enables the world's most critical decisions in a $7 trillion industry, which risks to take, an…
London
- Skills: Kotlin, AWS, Terraform, distributed systems, data architecture, analytics, API development, cloud-native systems, AI/ML, data processing
- Level: senior
- Type: full_time
DRW
DRW is a diversified trading firm with over 3 decades of experience bringing sophisticated technology and exceptional people together to operate in markets aro…
London
- Skills: C++, Python, trading systems, market data, execution algorithms, high availability, distributed systems, concurrency, numerical recipes, software engineering
- Level: senior
- Type: full_time
M-KOPA
M-KOPA creates financial inclusion for the traditionally excluded through a fair, flexible, customer-centric financing model.
London
- Skills: C#, .NET, Microservices, Azure, Kubernetes, Event-Driven Architecture, DevOps, Automation, Cloud Computing, Testing
- Level: senior
- Type: full_time
Anaplan
At Anaplan, we are a team of innovators focused on optimizing business decision-making through our leading AI-infused scenario planning and analysis platform.
London
- Skills: Rust, Java, Kotlin, Kubernetes, Docker, AWS, GCP, multi-threaded systems, DevOps, agile development
- Level: mid
- Type: full_time
Cohere
Cohere is a team of researchers, engineers, designers, and more, who are passionate about their craft and are focused on scaling intelligence to serve humanity…
London
- Skills: Kubernetes, AI infrastructure, cloud providers, GPU workloads, Infrastructure as Code, Go, Python, machine learning, scalability, performance optimization
- Level: mid
- Type: full_time
Lyst
Lyst is a global fashion shopping platform founded in London in 2010 and catering to over 160M shoppers per year. We offer our customers the largest assortment…
London
- Skills: Python, Django, JavaScript, TypeScript, React, AWS, Kubernetes, Docker, PostgreSQL, Automated Testing
- Level: senior
- Type: full_time
Faculty
At Faculty, we transform organisational performance through safe, impactful and human-centric AI. With more than a decade of experience, we provide over 350 gl…
London
- Skills: Python, TypeScript, React, PostgreSQL, CI/CD, Docker, Kubernetes, AI, Decision Intelligence, Computational Twins
- Level: senior
- Type: full_time