25 of 25 Refactoring Jobs in London

looking for Strong C/C++ engineering experience in performance-sensitive systems Solid Python for tooling, Scripting, and integration Experience modernising or refactoring Legacy codebases Cloud experience (Azure preferred, AWS/GCP also fine) Familiar with CI/CD, containerisation, and DevOps practices Comfortable working closely with quantitative or financial ...

maintain applications using C# and .NET/.NET Core Contribute to the development of RESTful APIs and backend services Work on the modernisation and refactoring of legacy .NET applications Collaborate with product managers, business analysts and QA to deliver high-quality features Write clean, testable and maintainable code following best ...

appreciation for simple, maintainable design Experience in the financial industry is a plus Experience working with Third-party APIs is a plus Experience in refactoring and improving code performance and design is a plus Experience with Unit Testing is a plus Current tech stack C# .NET MVC Entity Framework (Code ...

across our stack (.NET Framework/.NET Core, HTML/CSS/TypeScript/React, Python, SQL Server, Oracle). The role focuses on refactoring legacy systems to reduce technical debt, improve reliability and performance, and embed modern security patterns across the service estate. In addition, the engineer will contribute ...

will join our team to help us deliver high quality code for new and existing projects. Your main focus will be the development and refactoring of backend-services using C# .NET (full framework, .NET6) and supporting application delivery to multiple environments. The main responsibilities of the position include: Full stack ...

through code reviews, design sessions, and hands-on pairing—encouraging thoughtful abstractions, clean architecture, and pragmatic delivery. Use AI development tools for assisted coding, refactoring, test generation, secure code analysis, documentation, and knowledge search—evaluating where AI accelerates while maintaining human oversight. Collaborate with stakeholders to translate trading requirements into ...

engineers through code reviews, design sessions, and hands-on pairingencouraging thoughtful abstractions, clean architecture, and pragmatic delivery. Use AI development tools for assisted coding, refactoring, test generation, secure code analysis, documentation, and knowledge searchevaluating where AI accelerates while maintaining human oversight. Collaborate with stakeholders to translate trading requirements into robust ...

through code reviews, design sessions, and hands-on pairing—encouraging thoughtful abstractions, clean architecture, and pragmatic delivery. Use AI development tools for assisted coding, refactoring, test generation, secure code analysis, documentation, and knowledge search—evaluating where AI accelerates while maintaining human oversight. Collaborate with stakeholders to translate trading requirements into ...

through code reviews, design sessions, and hands-on pairing—encouraging thoughtful abstractions, clean architecture, and pragmatic delivery. Use AI development tools for assisted coding, refactoring, test generation, secure code analysis, documentation, and knowledge search—evaluating where AI accelerates while maintaining human oversight. Collaborate with stakeholders to translate trading requirements into ...

will architect scalable, secure, cost-optimized target environments on AWS, guide containerization & modernization initiatives, and drive migration strategies such as rehost (lift & shift), replatforming, refactoring, and application consolidation . This role requires a blend of deep hands-on AWS knowledge, architectural leadership, stakeholder management, and the ability to articulate business ...

systems and processes across a given project(s) or technical domain Analyse, profile and plan work, aligned with project priorities Perform reviews of code, refactoring where necessary Deploy code in a structured, trackable and safe manner Document your data developments and operational procedures Ensure adherence to data/software delivery ...

procedures. Software Engineering & Collaboration Write clean, tested, maintainable code in Python (and optionally .NET). Apply SOLID, TDD/BDD where sensible, code reviews, refactoring, performance profiling. Collaborate in an Agile environment; contribute to technical specs and implementation plans. Build POCs to de-risk architecture and showcase value; harden POCs ...

high-impact legacy services while building AI-powered engineering workflows. What You'll Do Modernise critical legacy Java services using AI-driven analysis and refactoring Apply migration patterns (e.g. strangler fig) to deliver clean, modern APIs Ship improvements in fast cycles with measurable gains in performance and reliability Build ...

engineering, model selection, and LLM capabilities. Proven AI Impact Demonstrated success in using AI to improve productivity and code quality. Experience with AI-assisted refactoring, test generation, and documentation at scale. Please apply within for further details - Matt Holmes, Harvey Nash ...

engineering, model selection, and LLM capabilities. Proven AI Impact Demonstrated success in using AI to improve productivity and code quality. Experience with AI-assisted refactoring, test generation, and documentation at scale. Please apply within for further details - Matt Holmes, Harvey Nash ...

sector. Active SC Clearance. Experience maintaining and troubleshooting legacy applications/infrastructure, including Oracle, WebLogic, and Elasticsearch. Building and supporting CI/CD pipelines, refactoring code, and developing automated tests. Strong knowledge of Nginx, Apache Tomcat/HTTP, and ETL processes. Installing and supporting Oracle 11, including Partitioning, RAC, RMAN ...

enterprise environment. What You'll Be Doing Designing and developing applications using .NET Framework/.NET Core , React/TypeScript , Python , and relational databases Refactoring and modernising legacy systems to reduce technical debt and improve performance and reliability Embedding modern security patterns across APIs and services (authentication, authorisation, OWASP controls ...

ensure permanent closure of incidents Engage with development team throughout the life cycle to help develop software for reliability and scale, ensuring minimal refactoring or changes Identify application patterns and analytics in support of better service level objectives Design self-healing and resiliency patterns Design automated software and product upgrades ...

Proven experience working on live production systems ✔️ Full-stack JavaScript/TypeScript (Next.js, Node, APIs, databases) ✔️ Python experience (scripting, services, tooling, data processing) ✔️ Strong refactoring and system-improvement skills ✔️ Comfortable in fast-moving, imperfect environments ✔️ Able to work autonomously with strong judgement on priorities & risk Highly Desirable ⭐ C#/.NET ...

SAST, etc.) Optimization: Enhance performance through parallel builds, caching, and dependency prefetching Integrity & Security: Ensure artifact integrity via SHA-mapping and reproducible inputs while refactoring legacy scripts to modern standards. Mentorship: Act as a subject matter expert for engineers on secure pipeline development and supply-chain practices 🎯 Major Requirements ...

SAST, etc.) Optimization: Enhance performance through parallel builds, caching, and dependency prefetching Integrity & Security: Ensure artifact integrity via SHA-mapping and reproducible inputs while refactoring legacy scripts to modern standards. Mentorship: Act as a subject matter expert for engineers on secure pipeline development and supply-chain practices 🎯 Major Requirements ...

maintaining scalable Back End systems Comfortable working with APIs, databases, and distributed systems Strong problem-solving skills and a pragmatic approach to debugging and refactoring Experience working with version control, testing practices, and code reviews Product-minded - able to think beyond the code and understand real user impact Experience working ...

target-state SAS architecture aligned to AWS. Repoint SAS workloads (ETL, models, analytics, reporting) from Cloudera to AWS. Provide guidance on code compatibility, refactoring, and modernization opportunities. Ensure solutions are secure, scalable, and compliant with banking regulations. Act as the technical authority, collaborating with architects, data engineers, and stakeholders. What ...

running on Node.js/Express Model and query relational and search-optimized data using PostgreSQL and Elasticsearch Contribute to backend architecture, performance tuning, and refactoring work Collaborate with technical and non-technical teammates to clarify requirements and break down work Own implementation from development through to deployment and monitoring ...

Practical experience of network segmentation of an existing network into zones, segments, end-to-end segregation from design through to delivery and migration (e.g. refactoring, deployment), and accompanying standards. • Documentation of the above areas including but not limited to: Standards, Patterns, Strategies, Roadmaps and recommendation papers – positioned at senior leadership ...