You'll work across the stack building core systems from scratch using Python, C#, Go, or Java, with direct collaboration with founders on product and technical strategy. This role is at an early-stage cybersecurity start-up focused on transforming how organizations secure data and infrastructure.

You'll work with TypeScript, React, Node.js, Python, JavaScript, SQL/NoSQL databases, and AI/ML tools including LLM-based APIs. Steven.com builds an operating system for the creator economy, and you'll ship end-to-end features across internal and external products.

You'll work with Python, SQL, Linux, Docker, and legacy systems, plus desirable tools like dbt, Snowflake, Kafka, AWS, and Java. You'll develop ELT pipelines, build a streaming platform for tick data, and consolidate legacy systems for Aspect Capital, a London-based systematic hedge fund. This is a lean team owning end-to-end delivery of data ingestion and transformation.

You'll work with TypeScript, React, Next.js, Node.js, Express, and PostgreSQL. The team builds financial products for African businesses, including automated payouts, payment automation, and invoice processing. You'll join a small, high-performing team shaping the product vision and technical architecture.

Staff Full Stack Engineer at Capi, working with Typescript, React, NextJS, NodeJS, Express, and PostgreSQL. The role involves building and scaling a platform for African businesses, contributing end-to-end from UI to backend logic, and working closely with the founding team in London and Paris.

Build features using Java, Python, and MATLAB, integrating with proprietary trading systems and strategic SaaS providers while applying TDD, CI/CD, and monitoring. You will join the Software Development team at Aspect Capital, an award-winning systematic hedge fund managing over $8 billion in assets.

You'll work with Java 21, Spring Boot 3, event-driven microservices on AWS (EC2, RDS, SQS, SNS, SES, Cognito), PostgreSQL, Docker, and GitHub Actions CI/CD, using AI tools like Claude Code. Aslan builds the back-end systems that power payroll and payments for companies and their employees.

Tech Lead role at a boutique financial services consultancy building digital banking solutions. Leads a team of engineers using Java, Kotlin, Python, JavaScript/TypeScript, Spring, and Node.js, with hands-on coding, system architecture, and cloud-based applications.

You will work with SailPoint IdentityIQ, Java, Active Directory, Azure AD, LDAP, Workday, Fieldglass, SAML, OAuth, and SCIM. You will join AIG’s Identity and Access Management team, designing and maintaining enterprise IAM infrastructure for the global insurance company. No team size is stated.

Fitch Group★4.5 (4)· London

Service Reliability Engineers embed with Fitch Ratings development squads, using AWS, Azure, Kubernetes, Docker, GitHub Actions, Datadog, and AWS Bedrock/SageMaker. They drive reliability, observability, and AI-enabled operations for mission-critical services, focusing on new AI development and cloud infrastructure automation.

You'll work with AWS, AWS CDK, Kubernetes/EKS, Lambda, ECS, CircleCI, GitHub Actions, Redshift, RDS, Kafka, Flink, Redis/Valkey, Datadog, and scripting languages like TypeScript, Python, or Bash. Sparta is a commodity trading platform; its Platform Engineering team owns the tooling, automation, and infrastructure that developer teams use to build, deploy, and run software.

You will work with Go, Rust, Python, Java, C++, headless browsers (Chrome DevTools Protocol, Playwright, Puppeteer), proxy systems, and distributed systems. The team builds infrastructure for massive web data acquisition and operates a distributed crawler via the Grass bandwidth-sharing network, powering dataset creation for AI model training.

Work with Python, Java, or C++, and AI frameworks like TensorFlow, Keras, or PyTorch to develop and implement AI models and algorithms. You will solve real-world problems, integrate AI into existing systems, and research performance enhancements for cutting-edge AI applications at Demo Co.

You will work with Oracle (Exadata Cloud, Autonomous, 11g/12c/18/19c, RAC, ASM, Data Guard), PL/SQL, Python, Bash/KSH, Ansible, Java, Oracle APEX, Git/Stash, JIRA, RMAN, and data pump. The Global Database Engineering Team manages Deutsche Bank’s relational database platform and builds automation to keep business systems operational.

You'll work with GitLab, Artifactory, Ansible Automation Platform, Kubernetes, ArgoCD/Flux, and cloud-native technologies. As a Principal Engineer in the Engineering Platforms team, you’ll deliver a modern software development toolchain for over 25,000 colleagues across the bank, coordinating multiple feature teams and defining architecture for end-to-end automation and scalability.

This role involves building data pipelines, Snowflake data models, and automation using SQL, Python, Java, or R, with practices like version control and CI. The engineer joins Sony Interactive Entertainment's Security Data Analytics team, supporting Information Security with analytics-ready data and AI-enabled workflows.

You will work with Kotlin, Java, Python, or TypeScript on AWS (Lambda, ECS, EKS), using AWS CDK, Terraform, Kubernetes, Datadog, Kafka, Flink, Redis/Valkey, RDS, and Redshift. This role is a 50/50 backend and reliability engineering split on Sparta’s commodity trading platform, building distributed services for real-time market data and owning production observability and resilience.

You will work with ReactJS, NodeJS, MongoDB, AWS, HTML/CSS/LESS/SASS, and Git/CICD. Atominvest builds software that powers private equity, venture capital, and hedge funds to manage investing, fundraising, and operations. You will help mentor junior team members, though the team size is not specified.

Hands-on technical lead supporting low-latency trading infrastructure and financial systems. Technologies include AWS, Kubernetes, Terraform, Ansible, Jenkins, GitLab, Python, Bash, Docker, Splunk,

You’ll build cloud-first web apps using C#/ASP.NET Core, TypeScript/React/Angular/Blazor, REST APIs, microservices, and messaging (Service Bus/Kafka), deploying via Azure Kubernetes Service, Docker, and DevOps tools like Git, Jenkins, and Azure DevOps. You’ll join the Tax & Legal Technology team—300+ technologists—working on tax and legal software, client portals, and generative AI initiatives in small agile engineering teams.

You will work with Kotlin, Java, Python, TypeScript, AWS/GCP, Kafka, Flink, Redis, and clustered Postgres, using agent-based tools like Claude Code. As a backend engineer on Sparta’s next-generation commodity trading platform, you’ll design and maintain services for real-time and analytical data processing, optimizing for low latency and high throughput.

Design and deliver secure, scalable Microsoft 365, Azure and AI-enabled solutions using TypeScript, SharePoint Framework (SPFx), Microsoft Graph APIs, PnP PowerShell, Azure AI Foundry, Azure OpenAI, Azure Functions, Logic Apps, .NET Core, C#, Terraform and Bicep for client projects.

GUARDIAN NEWS & MEDIA★4.6 (7)· London

Staff Android Developer role building the Guardian Android app in Kotlin and Java, using Jetpack Compose, Coroutines & Flow, MVVM, WebViews, and modular architectures. You'll lead technical direction, influence architecture, and mentor engineers across multiple teams for an app with over 5 million downloads.

Lead AI Software Engineer working hands-on with Java, Spring Boot, React or Angular, RESTful APIs, microservices, Kafka, RabbitMQ, and cloud-native architectures. The role leads software implementation and engineering delivery across squads for VOIS, Vodafone’s strategic arm creating intelligent solutions.

Work with Java, Python, JavaScript, ReactJS, AngularJS, AWS, GitLab, Google Cloud Platform, Kafka and Hadoop. You will join the Engineering Platforms team delivering a modern software development toolchain for engineers across the bank.