Java back-end developer using microservices, REST APIs, AWS (Lambda, EKS, RDS, S3, MSK), CI/CD, and AI tools (GitHub Copilot, LLMs). Builds next-gen trading and cash management systems for the Short-Term, Cash, and Collateral desks, modernizing platforms and migrating to AWS.

JPMorgan★3.9 (20k)· London

You will work with Python, AWS, EKS, Docker, Kubernetes, Kafka, and MLOps tools. As a member of the Applied AI/ML Software Engineering team within CIB Security Services Technology, you will build cloud-based frameworks for hosting machine learning models alongside Data Scientists to integrate AIML solutions into production systems.

Capgemini★3.7 (11k)· London

Design, build, and manage data pipelines and models using AWS Snowflake, Azure Data Lake, Databricks, Redshift, and BigQuery. Automate CI/CD with Azure DevOps, GitHub Actions, Jenkins, GitLab CI/CD, and provision infrastructure with AWS CloudFormation, Docker, ECS, EKS, and Kubernetes. Capgemini is an AI-powered global business and technology transformation partner.

MAREX★3.2 (6)· London

You will work with C# .NET, JavaScript, TypeScript, React, Node.js, GraphQL, Docker, NoSQL/RDMS databases, and AWS cloud services (ECS/EKS, Lambda, S3, RDS, API Gateway). The team builds and maintains applications to strengthen the company’s market-making capabilities and improve operational efficiency across multiple asset classes and geographies.

You will work with Python/Java, Docker, ECS/EKS, GitLab, CI/CD, Terraform, AWS, and Kafka to build a cloud-native customer onboarding platform for a banking client. As a Principal Engineer, you provide technical leadership across multiple squads and mentor a team of approximately 10 junior engineers.

You will design, build, and operate AWS infrastructure, engineer Kubernetes environments (EKS, Docker, Helm), and use Terraform for infrastructure-as-code. You will support critical investment and trading systems, improve CI/CD pipelines with GitHub Actions and GitOps (Argo CD), and work with databases like Snowflake, Aurora, and SQL Server. You will take end-to-end ownership of production systems, solve complex problems across distributed environments, and influence cloud architecture and reliability standards.

American Express★4.1 (9.7k)· London

You will work with Kotlin/JVM, Java, React, Postgres, MongoDB, Redis, Docker, Kubernetes, and GitHub Actions. The Financial Insights and Tools group builds financial analysis software for American Express customers, powered by APIs and underlying platforms for web and mobile applications.

Work with Kotlin/JVM, Java, React, APIs, Postgres, MongoDB, Redis, Docker, Kubernetes, GCP GKE, AWS ECS/EKS, Ktor, Spring, and GitHub Actions. The Financial Insights and Tools group builds customer-facing web and mobile features that aggregate and analyze financial data to enhance personal finance management.

You'll work with Azure, Kubernetes (AKS), Terraform, GitHub Actions, Prometheus, Grafana, and PowerShell to build and maintain the Azure platform and CI/CD for a 100-person fintech. As the third member of the Platform team, you'll support a 10-person dev team by improving infrastructure and making the platform easier for them to use.

Work with AWS, Amazon EKS, Terraform, GitHub Actions, Python/Go, Amazon RDS, and Linux to build and maintain cloud-native infrastructure. The platform serves regulated financial services, trading, and gambling clients, with a focus on security, availability, and SRE principles (SLIs, SLOs, error budgets). You will act as a technical leader, owning architecture and standards with real influence over platform direction.

American Express★4.1 (9.7k)· London

Work with Kotlin/JVM, Java, React, Postgres, MongoDB, Redis, Docker, Kubernetes (GCP GKE, AWS ECS/EKS), GitHub Actions, Ktor, and Spring. The Financial Insights and Tools group within Digital Banking builds financial analysis and planning applications for American Express customers on web and mobile, powered by APIs.

STINT★3.6 (65)via Jack & Jill· London

Build and maintain core systems using Python (Django), Go, Flutter, GraphQL, PostgreSQL on AWS/EKS with DataDog and GitLab. You’ll join a cross-functional product pod powering Stint’s platform that combines a flexible student workforce with AI for hospitality brands.

Durlston Partners· London

You'll use Java, Spring Boot, Kafka, and AWS (EKS, S3), plus PostgreSQL, SQL Server, and CI/CD. The team builds the core trade processing, reconciliation, and reporting platform for a leading systematic hedge fund’s multi-asset trading, collaborating closely with traders and quants.

Apple★4.1 (14k)· London

Work with Kubernetes (GKE/EKS), GCP/AWS, Java, Swift, Python, or TypeScript, Nginx, Envoy, Prometheus, Docker, Terraform, Pulumi, and CI/CD pipelines. The SRE team supports Private Cloud Compute (PCC), Apple's privacy-preserving cloud intelligence platform, ensuring availability and automation of critical systems.

Wipro★3.8 (17k)· London

Lead design and build-out of a managed container environment, migrating existing VM-based infrastructure (likely Kube, an internal Kubernetes/EKS cluster); work with Docker, Terraform, Ansible, RHEL, Bash, Python, and tooling like Prometheus, Grafana. The team at Wipro manages EMEIA cloud infrastructure and internal system connectivity.

You will work with Java 11+, Spring Framework, Hibernate, REST microservices, AWS (Lambda, ECS, EKS), Terraform, and Kubernetes (deployments, ingress, autoscaling, monitoring). This role is with LA International Computer Consultants Ltd, an IT consultancy. No specific team or project scope is listed.

You will design and build Python services and APIs using AWS (Lambda, S3, ECS/EKS, Step Functions, Aurora), Kafka, and PostgreSQL/SQL Server/Snowflake to support portfolio construction, trading, and analytics. This Investment Technology role turns research tools into production-grade platforms for Portfolio Managers and Quantitative Researchers across Equities, Fixed Income, and Alternatives.

Work with Java/Kotlin/JVM, Postgres, MongoDB, Redis, Docker, Kubernetes, GCP GKE, AWS ECS/EKS, GitHub Actions, and frameworks like Ktor and Spring. You'll handle end-to-end delivery of green-field and brown-field software projects, collaborating with customers and product teams.

Capgemini★3.7 (11k)· London

Architect enterprise-scale generative AI solutions on AWS using Amazon Bedrock, RAG, agentic workflows, and cloud-native services. Define reusable patterns, implement observability, and ensure governance in regulated environments. Hands-on Python, Lambda, SageMaker, OpenSearch, and ECS/EKS.

You will work with AWS and Amazon EKS, automating infrastructure with Terraform and building CI/CD with GitHub Actions, GitLab CI/CD, ArgoCD, and GitOps. Scripting is in Python and Bash/Shell, using Helm, Kustomize, Prometheus, Grafana, and the ELK stack. The team supports production AWS/EKS environments for a leading gaming company.

Build with Java/Kotlin using event-driven architectures, Spring Boot, and Kafka on containerised AWS infrastructure (EKS, SQL/NoSQL databases). You will architect and deploy software services for Runa’s digital payments API, enabling instant global payouts to 5 billion+ consumers.

U.S. Bank★3.5 (12k)· London

Work with CI/CD (GitLab, Jenkins, Harness), Terraform, AWS (ECS/EKS, Lambda, S3, IAM), Docker, Kubernetes, OpenTelemetry, CloudWatch, and Python/Bash. You own the deployment, operations, and reliability of the AI‑SDLC platform as it transitions from local execution to a centralized, hosted enterprise service.

You will build with Java and Kotlin using event-driven architectures on AWS (EKS, SQL/NoSQL databases) and the Spring ecosystem, with tools like Kafka or Terraform. You'll architect, implement, and deploy end-to-end software services that power Runa's global digital payments infrastructure, enabling instant, scalable money movement. You will also guide and mentor more junior engineers on the team.

You will build with Java and Kotlin using Spring Boot, REST, and Data on an event-driven microservice architecture running in containers on AWS EKS, with SQL/NoSQL databases and tooling like Kafka, Terraform, and Helm. The team builds Runa’s digital payment rail that lets businesses send money instantly to cards, wallets, and bank accounts globally.

Build and manage CI/CD pipelines (GitLab/Jenkins/Harness), infrastructure as code (Terraform), and AWS cloud services (ECS/EKS, Lambda, S3) with Docker and Kubernetes for the AI‑SDLC platform. Ensure platform reliability, monitoring (OpenTelemetry, CloudWatch), and operational support, while driving the centralized, hosted enterprise service through automation and security compliance. This role is within the team at Elavon, a U.S. Bank subsidiary building tailored payment solutions.