9 of 9 Remote/Hybrid Legacy Code Jobs in England

untangling complex systems and modernising core infrastructure without breaking production. This is an exciting opportunity to modernise core C#/SQL systems! Extract legacy business logic, build clean services, and verify changes in shadow mode with zero downtime to revenue flows. Extract business rules scattered across C#, embedded JavaScript … rules assemblies. Build new services cleanly. with proper Dependency Injection (DI), robust authentication/authorization, structured logging, and full observability. Work fluently across both legacy .NET Framework 4.8 (ASP.NET MVC5, WebAPI 2, EF6) and modern .NET, as both will coexist for the whole transition period. Navigate across the multiple ...

time messaging systems. Enhance Observability: Build deep telemetry and metrics to diagnose latency and performance anomalies across the full client-to-backend path. Kill Legacy Code: Gracefully sunset legacy networking components without interrupting the user experience for hundreds of millions of clients. Who You Are An Expert ...

help build, modernise, and support business-critical Windows applications for this fantastic Software Consultancy. If you enjoy C#, SQL Server, system integrations, and transforming legacy code into clean, modern.NET solutions, this is a great opportunity to make a real impact. Work with: C#, .NET/.NET Core, WinForms ...

join initially on a 2-year Fixed Term Contract. With a significant multi-year Billing Transformation Programme underway, the business is replacing a complex legacy billing platform with a modern enterprise solution. This is a high-impact programme to with strong investment to modernise and the chance to introduce … your time will involve working on a heavily customised, customer-specific billing platform, where logic can vary significantly between clients. You'll analyse existing code, uncover undocumented behaviours and translate this into clear documentation and understanding for both technical and business teams. You'll work closely with Billing SMEs ...

lean heavily into AI‐driven development. Using Goldman Sachs' AI tooling and agentic coding assistants, you will govern multiple AI agents, rapidly comprehend large legacy codebases, generate and assess production‐quality code, and accelerate every phase of the software development lifecycle. Your Impact Drive a strategic transformation : Work … centric, AI‐driven world, and define and deliver the requirements for CTL integration. Multiply your output with AI : Orchestrate AI coding agents (e.g., Claude Code, GitHub Copilot, Devin, Gemini Code Assist) across all stages of the SDLC while maintaining mastery, quality, and production fitness over all AI‐generated ...

London in need of a developer to architect and enhance their regulatory reporting infrastructure. You'd be designing systems from scratch, not just maintaining legacy code. The technical challenges involve processing massive datasets, implementing robust validation protocols, and creating scalable solutions that meet strict regulatory requirements. ...

technical direction About You We're looking for an engineer with commercial experience in embedded systems who enjoys building products rather than simply maintaining legacy code. You'll ideally have experience with: Embedded C ARM-based microcontrollers Embedded firmware development Hardware debugging Sensor integration IoT or connected devices Reading ...

NetSuite environment, ensuring our data and workflows are as high-performing as our team. Scripting: Generating SuiteScripts to solve business puzzles and maintaining legacy code. Optimisation: Managing system updates (products, classes, customers) and ensuring workflows run like clockwork. Data & Insights: Handling migrations, imports/exports, and building powerful reports ...

business. You'll help build highly resilient APIs and backend services capable of processing millions of signalling events every day, whilst modernising legacy architecture into loosely coupled, cloud-native services that are easier to scale, maintain and evolve. This isn't a role where you'll spend months fixing … bugs in a legacy codebase. You'll be helping shape the next generation of the platform while solving the kind of scaling and reliability challenges that don't exist in smaller engineering teams. What You'll Be Doing Building scalable backend services using Python Designing robust, secure APIs powering ...