Work with Java, Spring, event-driven systems (Solace, Kafka, Web Sockets), Domain-Driven Design, CI/CD, and cloud containerization. Lead hands-on development of high-performance core services for Citi’s FX technology platform, collaborating with traders, quants, and engineers to evolve global finance systems.

Reward Gateway★4.4 (11)· London

Define and champion the architecture vision for the Engagement Business Unit, working with global architecture and engineering leaders. The role involves leading architecture governance, establishing reusable patterns, and driving the adoption of AI-enabled engineering practices across APIs, microservices, event-driven systems, and data streaming platforms like Kafka. You'll partner with product and engineering teams to deliver scalable cloud-native applications and improve CI/CD pipelines and software delivery practices.

Insulet Corporation★3.1 (189)· London

Lead a globally distributed MuleSoft engineering team owning the AI Enablement Integration portfolio. The role works with MuleSoft Anypoint Platform, AI Gateway, Model Context Protocol (MCP), Agent Fabric, CloudHub 2.0, and Flex Gateway to make enterprise systems and APIs securely available to AI agents and automation platforms.

Insulet Corporation★3.1 (189)· London

You will lead a globally distributed MuleSoft engineering team, using MuleSoft Anypoint Platform, AI Gateway, MCP, Agent Fabric, API-led connectivity, CloudHub 2.0, and Flex Gateway to build secure, governed integration capabilities for enterprise AI agents, automation, and intelligent workflows. This role owns the AI Enablement Integration portfolio at Insulet, a company pioneering “Liveable Technology” to transform diabetes care.

Wise★3.5 (42)· London

Build backend

Work with C#, .NET 8+, Blazor, Azure (Service Bus, Container Apps, SQL), Terraform, and CI/CD to build event-driven microservices that integrate AI/LLM components at an AI and PropertyTech scale-up. You'll join a small, close-knit team collaborating directly with

FDM Group★2.9 (270)· London

Senior .NET developers use C#, .NET 8, ASP.NET Core MVC, CQRS, Domain-Driven Design, Azure DevOps, Git, and CI/CD to build secure web applications and services. The role leads design and delivery for a large-scale Investment Programme platform within the Public Sector, integrating with Dynamics 365 and CRM systems.

You'll build and maintain core domain services using C#, .NET, Kafka, and AWS, employing Domain-Driven Design, hexagonal architecture, and AI tooling (Copilot, Claude Code, Codex). You'll help re-platform a legacy Django application to a service-based .NET platform for En>ACT, a RegTech SaaS solution enabling regulatory transaction reporting and reconciliation for financial firms.

Work with Java, Spring Boot, Kafka, and PostgreSQL to design and maintain highly scalable microservices. You will join the Partner Cash Management team, building infrastructure that lets banks fund, hold, and manage money within interbank payment networks.

Lead a hands-on engineering team building a greenfield Agentic AI Platform for banking workflows using Python, Java/Spring Boot, and Go, with LLM/agentic frameworks (Google ADK, LangChain), GCP, Vertex AI, Elastic, Pinecone, Databricks, Kafka, Kubernetes, and Terraform. You will drive architecture, code, and mentor a new team of software and ML engineers.

Citi★3.9 (21k)· London

Lead architecture and hands-on development of a greenfield Agentic AI Platform on GCP using Vertex AI, ADK, LangChain, multi-agent architectures, and RAG with Python, Java/Spring Boot, and Kubernetes. The platform empowers Citi’s corporate and investment bankers with autonomous agents to streamline workflows and deepen client relationships.

You will work with Java, Spring, PostgreSQL, Neo4j, Docker, and CI/CD pipelines to build APIs and scalable access control systems. The team develops GraphAware Hume, a graph-powered analytics platform that helps law enforcement and analysts gain data insight.

Wise★3.5 (42)· London

You'll work with Java, Spring Boot, Kafka, and PostgreSQL, building event-driven microservices on Wise's global payment network. You'll join the Partner Cash Management team, which builds infrastructure enabling banks to fund, hold, and manage liquidity in interbank payment systems.

Globant★4.1 (350)· London

Modern architecture patterns (microservices, DDD, cloud-native on AWS/Azure/GCP) and hands-on depth with principal architects. This VP Technical Evangelist bridges engineering and executive stakeholders (CTO, Directors) within Globant’s airline digital transformation programmes, defending architectural integrity across multi-vendor delivery.

Ebury★3.3 (13)· London

You will work with Python, Java, or Go, cloud platforms (AWS, GCP, Azure), Docker, Kubernetes, and CI/CD pipelines. As part of the Identity team, you’ll design and build IAM platforms, Fine-Grained Access Control systems, and authorization policies for Ebury’s global FinTech platform.

Wise★3.5 (42)· London

You'll use Java (Spring), Kubernetes, AWS, RESTful APIs, Swagger, OpenAPI, OAuth2, and relational/non-relational databases like MySQL, PostgreSQL, MongoDB, and Cassandra. On the Wise Platform team, you'll provide technical consulting and integration support to global financial institutions and tech companies embedding Wise's international money movement products via API.

Ebury★3.3 (13)· London

You will use Python, Java, or Go with cloud platforms (AWS, GCP, Azure) and containerisation (Docker, Kubernetes). You will build and maintain mission-critical identity, access management (IAM), and fine-grained access control (FGAC) systems for Ebury’s global financial platform as part of the Identity team.

Citi★3.9 (21k)· London

You will work with Java, Angular, microservices, event-driven architectures (Kafka, RabbitMQ), Spring Boot, Docker, Kubernetes, and AI frameworks (Python, LangChain). At Citi, a global financial services firm, you will design and deploy AI-enabled full-stack applications, integrating agentic AI to solve complex business challenges.

Wise★3.5 (42)· London

You will work with Java, Spring Boot, Kafka, and PostgreSQL to build scalable microservices. You will join the Partner Cash Management team, which maintains infrastructure enabling banks to fund, hold, and manage money within interbank payment networks.

Work with TypeScript, Node.js, Go, AWS, PostgreSQL, event-driven architecture, and AI infrastructure (vector stores, embedding pipelines, LLM orchestration). You'll lead monolith-to-services decomposition, scale systems for tens of millions of MAU, and build AI-powered features for Fanvue's creator monetisation platform.

You'll lead a ~35-person engineering organization at Xapien, an AI-driven due diligence and risk intelligence platform serving financial services, wealth management, and supply chain sectors. Responsibilities include establishing agile delivery practices, scaling the team, implementing DevOps and MLOps standards, governing platform scalability and reliability, and partnering across product, commercial, compliance, and security functions. The role reports to the Co-Founder and CTO, owning operational execution while they retain product and technical vision.

LSEG★3.7 (402)· London

You will design and maintain backend services in Scala, Akka, Play Framework, and Cats within AWS cloud infrastructure, working on event-driven microservices for LSEG's critical equities market infrastructure. The role requires expertise in Kafka, Docker, Kubernetes, PostgreSQL, and DevOps pipelines using GitLab, alongside strong functional programming skills. You'll report to the Senior Technical Delivery Engineer and help shape engineering standards for the team.

LSEG★3.7 (402)· London

You'll work with Java 17+, Spring Boot, Docker, Kubernetes, Kafka, GitLab, PostgreSQL, and AWS services (Aurora, MSK, S3) to build event-driven microservices with blockchain integration capabilities. LSEG, a global financial infrastructure provider, is launching a new cloud-based post-trade market infrastructure service, and you'll contribute across the full engineering lifecycle while collaborating with cross-functional teams in an agile environment.

LSEG★3.7 (402)· London

You'll work with Java 17+, Spring Boot, Docker, Kubernetes, Kafka, PostgreSQL, and AWS services (Aurora, MSK, S3) while building event-driven microservices for a new cloud-based blockchain infrastructure platform for LSEG, a global financial markets infrastructure provider. The role requires blockchain integration expertise including smart contracts, interoperability protocols, and cross-chain communication. You'll report to the Director of Technical Delivery and lead engineering excellence across solutioning, design, coding, and testing in an agile environment.

Citi★3.9 (21k)· London

You'll build high-performance Java backend services for Citi's FX trading platform using Spring, event-driven architectures (Kafka, Solace), and Domain-Driven Design principles. The role involves designing scalable, resilient systems while collaborating with traders and quants, modernizing existing platforms, and improving CI/CD pipelines and observability. This hands-on engineering lead position requires Java expertise, AI tooling experience, cloud-ready development skills, and strong fundamentals in distributed system design.