Legacy Code Jobs in London

1 to 25 of 26 Legacy Code Jobs in London

Mid PHP Developer

London, United Kingdom
Hybrid / WFH Options
Salt Digital Recruitment
work on impactful projects that support NHS patients and service users across the UK. Responsibilities: Develop, maintain, and enhance PHP applications. Optimise and refactor legacy code for performance, security, and maintainability. Collaborate with cross-functional teams to design and implement new features. Ensure seamless integration between legacy systems and new applications. Maintain high code quality through testing, code reviews, and best practices. Provide technical support for live deployments when required. Experience: Proven experience in PHP development. Strong front-end skills, particularly in Vue.js, JavaScript, HTML, and CSS. Proficiency in SQL, preferably PostgreSQL. Previous experience More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Lead Software Engineer - Sustainable Cloud Native Platform

London, United Kingdom
Burns Sheehan
on the market. Having received huge investment, they are on a journey to truly disrupt the industry and are not held back by any legacy code or old customers. This means that they're able to build out state-of-the-art, Greenfield code which can focus More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Senior Software Engineer

London Area, United Kingdom
Burns Sheehan
on the market. Having received huge investment, they are on a journey to truly disrupt the industry and are not held back by any legacy code or old customers. This means that they're able to build out state-of-the-art, Greenfield code which can focus More ❯
Posted:

Senior Software Engineer

london, south east england, United Kingdom
Burns Sheehan
on the market. Having received huge investment, they are on a journey to truly disrupt the industry and are not held back by any legacy code or old customers. This means that they're able to build out state-of-the-art, Greenfield code which can focus More ❯
Posted:

Lead Software Engineer

London Area, United Kingdom
Burns Sheehan
on the market. Having received huge investment, they are on a journey to truly disrupt the industry and are not held back by any legacy code or old customers. This means that they're able to build out state-of-the-art, Greenfield code which can focus More ❯
Posted:

Lead Software Engineer

london, south east england, United Kingdom
Burns Sheehan
on the market. Having received huge investment, they are on a journey to truly disrupt the industry and are not held back by any legacy code or old customers. This means that they're able to build out state-of-the-art, Greenfield code which can focus More ❯
Posted:

Senior QA Engineer

London, United Kingdom
Zeelo
in from the start, while championing best practices and modern QA approaches. We're a fast-moving TransitTech business with plenty of exciting challenges-legacy code, evolving architecture, and new features that need rigorous testing across web, iOS, and Android platforms. If you thrive in an environment where More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Senior Software Engineer - Unified Platform

London, United Kingdom
DRW Holdings, LLC
systems with a constant focus on testing, reliability, scalability, and maintainability. Designing, modeling, and programming in a variety of languages and technologies. Working on legacy code as well as green field development. Initiative driving projects to completion. Learning and promoting new technologies with a focus on best practices. More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Senior Software Engineer

London Area, United Kingdom
Prism Digital
Software Engineer | C#, SQL, Legacy Refactoring | Systematic Hedge Fund Rate: £650-750 per day IR35: Outside Duration: 12 months+ Location: 3 days in the office per week in Moorgate/Liverpool Street We’re working with a high-performing, systematic hedge fund based in the City to help them … experience as a hands-on software engineer Strong C#/.NET and SQL background, ideally in data-centric or financial systems Solid experience refactoring legacy applications without full test coverage Testing; You must be a meticulous Tester in TDD. Excellent at writing characterisation tests to lock down behaviour before … improving You must have a passion for refactoring to improve code quality and for automated testing at all levels; unit, integration & acceptance. You take pride in annotated, clean commits and structured workflows Having a ‘DevOps mindset’ and getting the importance of culture If you enjoy carefully improving legacy More ❯
Posted:

Senior Software Engineer

london, south east england, united kingdom
Prism Digital
Software Engineer | C#, SQL, Legacy Refactoring | Systematic Hedge Fund Rate: £650-750 per day IR35: Outside Duration: 12 months+ Location: 3 days in the office per week in Moorgate/Liverpool Street We’re working with a high-performing, systematic hedge fund based in the City to help them … experience as a hands-on software engineer Strong C#/.NET and SQL background, ideally in data-centric or financial systems Solid experience refactoring legacy applications without full test coverage Testing; You must be a meticulous Tester in TDD. Excellent at writing characterisation tests to lock down behaviour before … improving You must have a passion for refactoring to improve code quality and for automated testing at all levels; unit, integration & acceptance. You take pride in annotated, clean commits and structured workflows Having a ‘DevOps mindset’ and getting the importance of culture If you enjoy carefully improving legacy More ❯
Posted:

Staff Software Engineer - Fintech

London, United Kingdom
Hybrid / WFH Options
Ebury
applications. Proficiency in constructing and managing services, including establishing standard APIs, integrating monitoring and alerting services, and expert integration with external systems. Comfort with legacy code, allowing you to maintain it and propose improvements once familiar with our workflows to help reduce technical debt. A strong commitment to … quality, expecting your code to be testable and well-covered with unit and integration tests. Familiarity with CI Jenkins pipelines and Terraform for the deployment of services and infrastructure is a plus. Demonstrated leadership experience in guiding engineering teams through high-impact projects, fostering a collaborative and innovative team More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Software Engineer (Kotlin)

London, United Kingdom
ENGINEERINGUK
processes e.g. Google Play Store Experience in UI development on a direct-to-consumer product Comfortable writing in cutting edge technologies as well as legacy code Familiarity with design patterns and object-orientated programming Understanding of version control e.g. Git. Understanding of unit testing and/or test … the in-house expert in Kotlin, with the opportunity to work with contractors when scaling up for larger projects Build well-formed and logical code for new functionality and bug fixes across our U platform primarily for mobile Implement accessibility features across our app(s) Work from supplied designs More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Software Engineer

London, United Kingdom
Deepstreamtech
making changes customers can see from day one. Some key projects on our roadmap this year include migrating key sections of our app from legacy code to Laravel and React, and working with our data team to integrate machine learning models into our data pipeline and front end. … a large number of documents from the web, index them, and allow users to search them through the web app. The majority of our code is written in PHP, but some parts of the data pipeline are written in Python, which is what we use for our data science More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Senior Platform Engineer AWS - FinTech

London, England, United Kingdom
Hybrid / WFH Options
Client Server
London/WFH to £100k+ Are you a senior Platform Engineer looking for an opportunity to work with a modern tech stack with no legacy code where you can make an impact and progress your career in a leadership role whilst remaining hands-on? You could be joining … have expertise with AWS You have experience of architecting, designing and implementing high frequency platforms You have a strong knowledge of IaC (Infrastructure as Code) tools such as AWS CDK, Terraform or CloudFormation You have experience of working on event driven microservices You're collaborative and pragmatic, with some More ❯
Posted:

Senior Platform Engineer AWS - FinTech

london, south east england, United Kingdom
Hybrid / WFH Options
Client Server
London/WFH to £100k+ Are you a senior Platform Engineer looking for an opportunity to work with a modern tech stack with no legacy code where you can make an impact and progress your career in a leadership role whilst remaining hands-on? You could be joining … have expertise with AWS You have experience of architecting, designing and implementing high frequency platforms You have a strong knowledge of IaC (Infrastructure as Code) tools such as AWS CDK, Terraform or CloudFormation You have experience of working on event driven microservices You're collaborative and pragmatic, with some More ❯
Posted:

Senior Software Engineer, Clojure

London, United Kingdom
DRW Holdings, LLC
systems with a constant focus on testing, reliability, scalability, and maintainability. Designing, modeling, and programming in a variety of languages and technologies. Working on legacy code as well as green field development. Initiative driving projects to completion. Learning and promoting new technologies with a focus on best practices. More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Lead Software Engineer

London Area, United Kingdom
Durlston Partners
and market connectivity—working closely with researchers and PMs to iterate rapidly. The environment is flat, technical, and collaborative, with minimal bureaucracy and no legacy code. Tech: Core stack in C++ and Rust. Open to other OOP backgrounds, however. Custom protocol handling, kernel bypass networking. Strategy evaluation infrastructure and More ❯
Posted:

Software Engineer

London Area, United Kingdom
Albany Growth
Software Engineer (C#/SQL/TDD/Code Refactoring/Python/Trading) 6 month contract initially £500 - £600 per day (outside IR35) Hybrid (London, The City) About the Role Albany Growth are looking for an experienced Software Engineer to join a growing technology team. This role is … critical to improving governance, code quality, and testing standards across applications and databases. The successful candidate will be responsible for rearchitecting and refactoring a key database in the company’s trading system. This will enable further modernisation of the software stack in collaboration with other engineers in the software … impact on business-critical software and to collaborate with and learn from other experts. Ideally you’ll have a passion for refactoring to improve code quality, and for automated testing at all levels: unit, integration and acceptance. Essential experience 10+ years commercial experience as a software engineer Significant experience More ❯
Posted:

🚀 C++ Engineer – World’s Largest (Almost!) Supercomputer

London Area, United Kingdom
Augmentti
the top of their fields, pushing the boundaries of technology and finance every day. Innovation & Impact: Work in a modern, young codebase with minimal legacy code and technical debt. You’ll have the freedom to choose the best technology for the job, allowing you to innovate and deliver More ❯
Posted:

🚀 C++ Engineer – World’s Largest (Almost!) Supercomputer

london, south east england, United Kingdom
Augmentti
the top of their fields, pushing the boundaries of technology and finance every day. Innovation & Impact: Work in a modern, young codebase with minimal legacy code and technical debt. You’ll have the freedom to choose the best technology for the job, allowing you to innovate and deliver More ❯
Posted:

Crypto Middle Office Engineer

London, United Kingdom
P2P
connectivity solutions, and monitoring systems Working in multiple languages, including Java, Python, and TypeScript Testing at the unit, functional, and integration level Working on legacy code as well as greenfield development Providing on-call support as needed Collaborating with traders, operations, and software engineers within our group as More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Model Risk Developer - Python

London Area, United Kingdom
Hybrid / WFH Options
Harrington Starr
GCP). Key Responsibilities Build, improve, and automate risk models. Collaborate with teams to refine risk strategies. Optimise reporting and infrastructure. Enhance and improve legacy codebase. What You’ll Need Expertise in Python, SQL, and GitLab. Experience in risk model development (LGD, PD, VaR, etc.). Background in banking More ❯
Posted:

Chief Technology Officer (CTO)

London, United Kingdom
Hybrid / WFH Options
OpenCorporates Limited
and maintaining a variety of self-service delivery mechanisms including web applications, API and data exchanges. Experience working with, and refactoring/rewriting, a legacy codebase. Familiarity with multiple programming languages (Ruby is our primary language at the moment, but we have a diverse tech stack, including Python). More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Chief Technology Officer (CTO)

City, London, United Kingdom
Hybrid / WFH Options
OpenCorporates
and maintaining a variety of self-service delivery mechanisms including web applications, API and data exchanges. Experience working with, and refactoring/rewriting, a legacy codebase. Familiarity with multiple programming languages (Ruby is our primary language at the moment, but we have a diverse tech stack, including Python). More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Backend Engineering Team Lead (.NET Azure)

London, United Kingdom
Hybrid / WFH Options
M-KOPA Kenya Limited
team you will work as a servant leader, coach and contributor within a team which places emphasis on high quality output using infrastructure as code, observability and monitoring as well as automated testing in all environments, including production. About Us At M-KOPA, we are revolutionising financial inclusion and … committed to building a fully decoupled, event-driven architecture. Why M-KOPA? Leadership Opportunity: Lead a team of talented engineers, guiding them through both legacy and greenfield projects. Innovative Environment: Continuously improve and innovate within a dynamic and supportive team. Remote Flexibility: Fully remote role within UTC -1 to … backend engineers, fostering a collaborative and high-performing environment. Lead as a servant leader, coach, and contributor, emphasising high-quality output using infrastructure as code, observability, and monitoring, as well as automated testing in all environments, including production. Full Ownership: Oversee the entire software stack, including supporting infrastructure, throughout More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:
Legacy Code
London
10th Percentile
£83,875
25th Percentile
£85,000
Median
£110,000
75th Percentile
£115,000