Senior Python Developer using Python and AWS to design, develop and enhance high performance trading systems and cloud infrastructure supporting front, middle and back office operations on the Asset Management side of a global Japanese bank.

You'll work with modern Angular 21, JavaScript, SQL, REST APIs, real-time systems, CI/CD, and AWS, with some Java backend exposure. The team builds a highly complex real-time shift rota application for the NHS, a "tech for good" product hosted on AWS. As a senior member of a small team, you'll re-architect the front end to Angular and influence technical decisions.

You will use Python daily, with Ruby useful but not required, and AI tools like Claude in your workflow. The team focuses on greenfield projects in a start-up or small business environment.

Develop high-performance systems using modern C++ (C++17/23) and Rust in a Linux environment. Build low-latency, highly concurrent software for a cybersecurity platform that automates threat detection and neutralization. Provide technical leadership, feature ownership, code reviews, and mentorship.

Senior C# Developer working with C# .Net, AWS, Apache Flink, Java, SQL, Terraform, and CI/CD on a Greenfield Market Data platform handling 40 billion messages per day with high scalability and low latency.

As a Backend Software Engineer, you'll use Go or Node.js to build and scale the company's core real-time messaging platform, working on low-latency Pub/Sub services and state synchronization in an AI-first engineering environment.

You will work with TypeScript, Python, and agentic AI in cloud environments such as AWS, Azure, or Google Cloud. You will lead data diligence and shape technology and data strategies for portfolio companies in finance and insurance. This is a Technical Lead role interacting directly with investors and executive leadership.

Full Stack Developer role using Python, TypeScript, AWS, Ruby on Rails, React, Redux, Node, and PostgreSQL. You’ll work on a loan origination and servicing platform for an ethical FinTech that offers small, short-term secured loans to help improve credit ratings.

You will work with Python, GCP (or AWS/Azure), FastAPI, and CI/CD practices, leading a small tech team to deliver new features and enhancements for a core banking platform that integrates with major partners like HSBC.

Software Engineer role using Python, SQL, ETL pipelines, Data Lakes/Lakehouses, distributed systems, microservices, Excel add-ins, CI/CD, and observability tools. You'll build a medallion architecture data platform for a Hedge Fund, working on data engineering, infrastructure, and frontend in a small collaborative team.

You will work with JavaScript, TypeScript, and offensive security tools for penetration testing, reverse engineering, and vulnerability assessments. You join a specialist security team at a global leader in Computer Vision, AI, and biometric identity, acting as the bridge between Security and Engineering to embed security throughout web application development.

Design, develop and deliver transformational projects focusing on Kafka messaging, migrating legacy systems to AWS, and introducing CI/CD pipelines. You will use Java, Spring Boot, REST APIs, and Kafka in microservices environments for clients, mainly in financial services.

Full Stack Engineer / Technical Lead role using Ruby, TypeScript, and React. You will own the technical strategy for Developer Ecosystems at a provider of serverless real-time infrastructure powering live chat, VoIP, and real-time pricing. Lead cross-team initiatives, mentor engineers, and manage open-source collaboration.

Software Engineer role using C# .Net, AWS, Apache Flink with Java, SQL, CI/CD, and Terraform to build a Greenfield Market Data platform requiring high scalability and low latency, handling 40 billion messages per day for a global financial Market Data provider.

Backend Software Engineer working with Kotlin, Spring Boot, Java, and AWS on a HealthTech startup’s greenfield applications. Collaborates with the CTO to design and code the full tech stack, including APIs, authentication, and security for a beta product improving patient record access.

Backend Python and Rust, with AWS, Azure, or GCP. You'll build a new Greenfield product to combat AI-based security attacks on the R&D team at a cybersecurity company.

You'll work with Python, Rust, and emerging technologies on a new Greenfield product that combats AI-based security attacks for a global cybersecurity company. The R&D team handles rapid prototyping and structured development across complex backend systems.

Work with Java, Spring Boot, Angular (v15+), Ruby, TypeScript, SQL, REST APIs, and AWS. Re-architect and enhance a real-time shift rotascheduling platform for the NHS, with a 50/50 split between backend and frontend projects. You will help influence best practice as a senior member of a small team.

As a Senior C# Developer, you will use C# .Net to design and develop real-time trading systems. You will collaborate with the strategy team on greenfield projects within the trading engine team of a global Sports Trading business.

Java, Spring Boot, JavaScript, Angular, Ruby, TypeScript, SQL, REST APIs, CI/CD, and AWS — re-architecting and enhancing a real-time NHS shift rota scheduling platform with a 50/50 backend/frontend split.

You'll work with Python, Go, Django, Flutter, AWS, and PostgreSQL on an AI workforce optimisation platform that connects temporary workers with hospitality clients via AI scheduling, scaling from 250,000 to millions of users while transitioning from a monolith to microservices.

C++ Developer working with C++, SQL, and AWS. You will design and build a strategic trading platform for a leading financial services client, collaborating closely with traders, stakeholders, and domain experts.