Core Technical Jobs

Senior Software Engineer - LondonHarrington Starr are working alongside a unique financial trading technology firm who are seeking 10+ Senior Java Developers to join their Core Development team and build out low latency systems.You absolutely have to have is a demonstrable interest in technology, precision, and technical excellence. Our client's mi...

Senior C# .NET Developer (Contract) Remote London (1 day per week in office)£475 per dayOutside IR35A well-established and highly specialised organisation operating within the infrastructure and environmental services sector is seeking an experienced Senior C# .NET Developer to join their team on a contract basis. This role will focus on enhancing ...

Senior C# .NET Developer (Contract) Remote London (1 day per week in office)£475 per dayOutside IR35A well-established and highly specialised organisation operating within the infrastructure and environmental services sector is seeking an experienced Senior C# .NET Developer to join their team on a contract basis. This role will focus on enhancing ...

We are partnering with one of London’s most selective and highest-performing quantitative investment funds to appoint a Senior Quant Software Developer to their core systematic trading group. This is a confidential mandate for a team renowned for world-class engineering standards, scientific rigour, and a culture built around high impact and low eg...

We are partnering with one of London’s most selective and highest-performing quantitative investment funds to appoint a Senior Quant Software Developer to their core systematic trading group. This is a confidential mandate for a team renowned for world-class engineering standards, scientific rigour, and a culture built around high impact and low eg...

Oracle Lead DeveloperKey PointsGlasgowImmediate start preferredContract – Outside IR35Competitive RateOverviewThis is an opportunity to join a global technology-driven organisation delivering large-scale, business-critical systems across complex enterprise environments.The organisation specialises in transforming and modernising core business platf...

.NET Developer, .NET 10.0, C# 14 - Digital Download Site – Sheffield(Tech stack: .NET Developer, .NET 10.0, ASP.NET Core, C# 14, Azure DevOps, Agile, Blazor, JavaScript, React, Multithreading, RESTful, ML.NET, Azure AI, Programmer, Full Stack Engineer, Architect, .NET Developer) With operations in over 20 countries our client has fast become a majo...

Founding Software Engineer | Python | Early-Stage AI Start-Up | LondonFounding Software Engineer (Python) required to build, scale, and own the technical foundation of a well backed, early-stage AI start-up from day one.This is a rare opportunity for a strong Python Software Engineer to join at the ground floor, working directly with the founders t...

Founding Software Engineer | Python | Early-Stage AI Start-Up | LondonFounding Software Engineer (Python) required to build, scale, and own the technical foundation of a well backed, early-stage AI start-up from day one.This is a rare opportunity for a strong Python Software Engineer to join at the ground floor, working directly with the founders t...

Java Developer –· Over 9-12+ years of experience in Java development, with a focus on microservices architecture.Responsibilities -· Lead the design, development, and deployment of microservices using Java and Spring Boot.· Develop and maintain scalable, high-performance microservices.· Integrate microservices with various databases, APIs, and thir...