1 to 25 of 50 Design Patterns Jobs in the City of London

This is an excellent opportunity to contribute to cutting-edge systems in Capital Markets and Risk Management , working with modern tools and robust enterprise-level platforms. Key Responsibilities Design, develop, and maintain robust applications using C#, .NET Core/.NET Framework . Collaborate with business and technology teams across the full software development lifecycle — from requirements gathering to … deployment. Build scalable, high-performance solutions using MVC architecture , RESTful APIs , and strong OOP principles. Develop and optimise complex SQL queries for SQL Server databases. Apply design patterns and best practices to deliver maintainable, high-quality code. Enhance and support Windows desktop applications (WinForms, WPF) working with large on-premise data sets. Participate in code reviews, documentation … . Proven experience developing Windows desktop apps (WinForms, WPF) and working with large on-prem databases . Solid understanding of MVC, RESTful APIs, OOP , and software design patterns . Exposure to Azure or AWS cloud environments. Familiarity with Git , CI/CD , and modern deployment methodologies . Excellent communication skills with the ability to engage both technical More ❯

events and stadiums to education, retail, and public sector projects. With more than 450 professionals across 15 countries, we combine global expertise with local insight to deliver strategy, design, and operational services that drive innovation, engagement, and growth. We’re now seeking a Solutions Architect to join our London based EMEA team. This role is a unique opportunity … relationships with business and technical teams to ensure adoption and success of solutions. Support business development initiatives by participating in client workshops, proposals, pitches and presentations. Solution Architecture & Design: Design solutions across cloud platforms, applications, and integrations … ensuring alignment with business strategy and best practice. Deliver clear architectural documentation, diagrams, and roadmaps to guide implementation teams. Contribute to PMY’s architecture standards, reusable design patterns, and governance frameworks. Technical Leadership & Delivery: Provide technical leadership during solution delivery, ensuring adherence to design principles. Collaborate with internal teams, partners, and vendors to integrate platforms More ❯

end to end eCommerce technology solutions with Shopify and associated systems (OMS, IMS, WMS, credit card processing, tax engine, digital distribution etc.) Strong proficiency in modern design patterns and development languages including JavaScript, Typescript, Python, HTML5, CSS3, HTML-CSS-Bootstrap and Ruby Experienced in NodeJS, JavaScript (ES2019+), ESLint and coding standards, Typescript Solid grounding with common design patterns and development best practices Knowledge of APIs, webhooks, and general data transfer approaches Able to define, design, implement complex, and scalable systems Ability to identify areas that can be streamlined or automated Good team player and communication skills Experience with agile development methodologies with Test Driven Development (TDD) Experience with Jenkins Setup CI/ More ❯

you ll play a key part in ensuring the reliability, security, and scalability of complex systems while collaborating with talented teams across development, QA, and operations. Key Responsibilities Design and develop scalable, high-performance solutions on AWS with a focus on robust architecture and efficient code. Continuously monitor and optimise AWS resources for performance, security, and cost efficiency. … standards across all AWS environments. Troubleshoot and resolve complex technical issues as part of incident response efforts. Maintain detailed documentation of architectures, configurations, and processes. Apply design patterns to ensure code reusability and maintainability. Develop and execute unit tests, following test-driven development (TDD) principles. Translate business requirements into technical deliverables to meet project goals. Key Skills … other languages such as Go is also welcome. Excellent problem-solving and troubleshooting skills. Strong communication and collaboration abilities, working effectively in Agile teams. Knowledge of design patterns, coding standards, and best practices. Experience with unit testing frameworks and TDD methodologies. AWS Certification (or equivalent) is highly desirable. What s on Offer Fully remote working from anywhere More ❯

We’re partnering with a leading FinTech company based in London to find an exceptional contractor who thrives in backend development. As a Senior .NET Engineer, you’ll design, develop, and optimise backend solutions for complex financial applications. You'll work in a collaborative environment, ensuring the delivery of scalable and secure solutions for critical FinTech projects. This … maintain backend applications using C#, .NET, and Azure. Leverage Microsoft SQL Server services (database, integration services, reporting services) and write complex T-SQL stored procedures. Implement design patterns such as Factory, Adapter, and Chain of Responsibility to ensure clean and maintainable code. Utilise Object Relational Mappers (ORMs) like Entity Framework for efficient database interaction. Work with Test … cloud technologies. Hands-on experience with Microsoft SQL Server services (database, integration services, reporting services). Advanced knowledge of T-SQL, including stored procedures. Familiarity with design patterns (e.g., Factory, Adapter, Chain of Responsibility). Experience with Object Relational Mappers (ORMs) like Entity Framework. Understanding of Test Driven Development (TDD) practices. Nice-to-Have Skills: Experience with More ❯

Designer, Mobile, B2C, Marketplace | London, Hybrid, UK Remote (Or 1 Day Hybrid from London) | Up to £85,000 We’re seeking a Senior UI Designer to join the Design System team on a 12-month fixed-term contract. This role focuses on shaping and evolving the company’s design language across web and mobile platforms (iOS … Day Hybrid from London) | Up to £85,000 Contribute to the ongoing evolution of the company’s design system — creating, maintaining, and documenting reusable UI components and patterns for use across digital platforms. Deliver pixel-perfect, production-ready UI with a focus on usability, accessibility, and brand identity. Collaborate closely with product designers, engineers, and product managers … to ensure design components are functional, scalable, and easy to implement. Identify opportunities to streamline workflows and standardise design patterns to improve product development efficiency. Champion system-led design consistency across web and native platforms. Design engaging UI elements, transitions, and microinteractions that enhance the user experience. Optimise designs for multiple More ❯

in London. This role is ideal for someone who enjoys working across multiple technologies, building scalable applications, and contributing to innovative projects in a collaborative environment. Key Responsibilities Design, develop, and maintain web applications using PHP and Python . Build and integrate RESTful APIs and microservices. Collaborate with front-end developers, DevOps engineers, and product teams to deliver … . Solid proficiency in Python (Django, Flask or FastAPI) . Experience with MySQL/PostgreSQL and familiarity with NoSQL databases . Understanding of object-oriented programming , design patterns, and software architecture principles. Knowledge of RESTful APIs , JSON, and web services. Familiarity with version control systems (Git) . Experience working in Agile/Scrum environments . Desirable Skills More ❯

API-first mindset and clean coding practices 🧪 Knowledge of Agile, peer reviews, pair programming, and test-driven development 📐 Understanding of software design principles (SOLID, design patterns, etc.) 🎯 Experience turning stakeholder needs into scalable solutions 🎁 Perks & Benefits: 💰 Salary Up to £95k 🏡 Hybrid work setup (2 days onsite) 🏥 Private Health Insurance 💵Pension Scheme If you’re ready More ❯

deploy, and monitor solutions using AWS services (Lambda, API Gateway, CloudWatch, ECS, ECR, Dynamo, S3 etc.) Integrate APIs into CI/CD pipelines using Azure DevOps, Github workflows Design, deploy, and manage applications tailored to business needs, while customizing platforms and overseeing the full API lifecycle using Apigee Edge and X. Drive API strategy execution, provide technical support … Ability to generate custom analytics reports for API consumption and errors Implementation of API security and access control (OAuth, API keys, JWT, etc.) Familiarity with API design patterns, best practices, and performance optimization Excellent collaboration and communication skills Randstad Technologies Ltd is a leading specialist recruitment business for the IT & Engineering industries. Please note that due to More ❯

monitor solutions using Apigee or AWS services (Lambda, API Gateway, CloudWatch, ECS, ECR, Dynamo, S3 etc.) Integrate APIs into CI/CD pipelines using Azure DevOps, Github workflows Design, deploy, and manage applications tailored to business needs, while customizing platforms and overseeing the full API lifecycle using Apigee Edge and X. Drive API strategy execution, provide technical support … Automate upgrade workflows using CI/CD pipelines and infrastructure-as-code tools. Infrastructure & DevOps: Hands-on experience with Terraform and Ansible for infrastructure provisioning and configuration management. Design and manage Azure DevOps CI/CD pipelines for secure and efficient software delivery. Deploy microservices using AWS ECS, ECR, and Fargate, ensuring secure and scalable architecture. Development & Containerization … on experience with Docker for containerizing applications and managing secure container environments. API Management & Analytics: Strong knowledge of Apigee or similar API Management platforms. Implement API design patterns, performance optimization, and custom analytics reporting for API consumption and error tracking. System Architecture: Deep understanding of build and deployment methodologies for distributed systems. Experience with enterprise-grade applications More ❯

API-first mindset and clean coding practices 🧪 Knowledge of Agile, peer reviews, pair programming, and test-driven development 📐 Understanding of software design principles (SOLID, design patterns, etc.) 🎯 Experience turning stakeholder needs into scalable solutions 🎁 Perks & Benefits: 💰 Salary Up to £95k 🏡 Hybrid work setup (2 days onsite) 🏥 Private Health Insurance 💵Pension Scheme If you’re ready More ❯

Treasury team in London. The firm operates at hedge fund scale with a start-up pace, focusing on building high-performance trading platforms. In this role, you will design and develop cutting-edge trading, funding, and liquidity management systems, working directly with traders and decision-makers in a live-market environment. Responsibilities: Architect and code resilient applications for … language, with integration into data platforms and tools. Engage directly with traders and treasury stakeholders during live situations, adapting to evolving requirements and delivering solutions on the fly. Design and optimise data pipelines for real-time and historical treasury data, ensuring accuracy and performance in analytics. … Work with operations teams to deploy, monitor, and scale systems, ensuring uptime and quick incident response. Identify technology gaps and inefficiencies, experimenting with new tools and design patterns to enhance speed and quality. Experience: 5-15 years of software engineering experience, ideally in Treasury or from a hedge fund/buy-side firm Expertise in Python for More ❯

a leading FTSE 250 organisation to recruit a WebApps Technical Lead. The Technical Lead will be responsible for guiding and mentoring a team of software engineers in the design, development, and deployment of .NET-based applications on the Azure cloud platform. You will work closely with cross-functional teams, including architects, business analysts and product managers to ensure … taking strategic direction from AppDev leadership, coordinate the technical design and development of enterprise-level .NET applications on Azure, ensuring alignment with best practices, design patterns, and industry standards. Azure Solutions: Architect and implement solutions leveraging Azure services (e.g., Azure App Services, Azure Functions, Azure SQL Database, Azure Blob Storage, Azure Service Bus, etc.) to More ❯

Senior Software Developer | £85,000 | London | Financial Services Overview: A leading financial services organisation is seeking a Senior Software Developer to drive the design, development, and delivery of critical technology solutions across its operations. This high-impact role sits at the heart of business transformation, focused on building scalable systems to support reporting, compliance, and operational efficiency.The successful … candidate will combine hands-on technical expertise with strong business acumen, driving the development of innovative solutions to support complex, enterprise-scale systems. Role & Responsibilities: Lead the design and delivery of enterprise applications and reporting systems Develop tools for dashboards, analytics, and operational monitoring Build and maintain APIs, data pipelines, and automation for business processes Implement scalable solutions … and data quality Enhance and integrate commercial off-the-shelf (COTS) platforms where required Collaborate with business stakeholders to gather requirements and deliver tailored solutions Define design patterns, development standards, and quality controls Lead and mentor developers, managing performance and growth Contribute to technology strategy, promoting innovation and best practices Essential Skills & Experience: 8+ years in software More ❯

We are looking for a Lead Architect Technology & Design responsible for shaping the future-state architecture that enables the organisation to meet its strategic business goals. This role ensures that technology solutions directly support desired business outcomes—such as improved efficiency, customer experience, scalability, and innovation—while maintaining strong architectural integrity. The Lead Architect oversees the design … product leaders to ensure technology decisions enhance business capability, value delivery, and time-to-market. Identify technology enablers for business innovation, operational excellence, and digital transformation. Application & Solution Design Oversight Provide architectural oversight on key projects, ensuring solutions are well-designed, secure, maintainable, and aligned with enterprise strategy. Guide the design of applications that deliver tangible … reduce complexity and total cost of ownership, while improving functional coverage and user satisfaction. Architecture Governance & Best Practice Define and enforce architectural principles, technology standards, and design patterns that balance innovation with operational integrity. Lead architectural governance forums to review and approve solution designs and ensure architectural consistency across the enterprise. Maintain up-to-date architectural artefacts More ❯

applications in a fast-paced, collaborative environment. What You’ll Be Working On: Building and maintaining advanced Android apps using Kotlin , Java , and frameworks like RxJava Designing with architecture patterns like MVP , MVVM , or MVI Handling the full app lifecycle – from modules through to Play Store deployment Optimising mobile experiences across a range of screen sizes and Android versions … Kotlin and Android architecture components Strong understanding of app lifecycle and mobile UI/UX best practices Strong understanding of Object-Oriented Programming, data structures, and design patterns Proficiency in Java application development Familiarity with GitHub , Jira , Confluence , Jenkins , and Gradle Agile mindset and collaborative working style Banking experience is a bonus, but not essential Android Developer More ❯

engineering team. This is a hands-on technical leadership role with high visibility and impact across the organization. You’ll work on large-scale systems, contributing to the design and development of modern, scalable, cloud-native .NET applications. You'll collaborate closely with platform teams, influence tech strategy, mentor engineers, and help evolve systems that serve both public … .NET Core, ASP.NET Cloud experience with AWS (Lambda, DynamoDB) or Azure + DevOps Proficiency with IaC tools like Terraform Strong grasp of modern dev methodologies and design patterns Exposure to containerization and CI/CD tooling Bonus: Familiarity with Go, Python, React, TypeScript, Node.js 🗺️ Location : Hybrid – 2 days a week in London This is a high-impact More ❯

Senior Software Developer | £100,000 | London | Financial Services Overview: A leading financial services organisation is seeking a Senior Software Developer to drive the design, development, and delivery of critical technology solutions across its operations. This high-impact role sits at the heart of business transformation, focused on building scalable systems to support reporting, compliance, and operational efficiency. The … successful candidate will combine hands-on technical expertise with strong business acumen, driving the development of innovative solutions to support complex, enterprise-scale systems. Role & Responsibilities: Lead the design and delivery of enterprise applications and reporting systems Develop tools for dashboards, analytics, and operational monitoring Build and maintain APIs, data pipelines, and automation for business processes Implement scalable … and data quality Enhance and integrate commercial off-the-shelf (COTS) platforms where required Collaborate with business stakeholders to gather requirements and deliver tailored solutions Define design patterns, development standards, and quality controls Lead and mentor developers, managing performance and growth Contribute to technology strategy, promoting innovation and best practices Essential Skills & Experience: 8+ years in software More ❯

empowering organizations with transformative tools to stay ahead in an evolving regulatory landscape. Job Type: Inside IR 35 Contract for 1 year Job Location- London, Hybrid Key Responsibilities: Design, implement, and maintain market connectivity solutions using TransFICC’s Unified API. Integrate and manage connectivity to electronic trading venues (e.g., Tradeweb, Bloomberg, MTS, BrokerTec, MarketAxess). Configure and support … Core Java (8/11/17) . Build and enhance components for pricing, order routing, and execution workflows. Apply low-latency, event-driven, and asynchronous design patterns to improve throughput and efficiency. Troubleshoot and resolve connectivity, performance, and messaging issues in production. Conduct latency tuning, load testing, and system optimization. Collaborate with SRE/DevOps teams … electronic market protocols: FIX (4.x/5.x) Market-specific APIs (Tradeweb, Bloomberg, MTS, etc.) Binary/Streaming protocols (ITCH, FAST, SBE, JSON over TCP). Familiarity with low-latency patterns, high-throughput messaging, and microservices. Additional Skills Experience with Linux, shell scripting, and performance analysis tools. Knowledge of Kafka, Redis, Aerospike, or other high-performance data stores. Understanding of More ❯

end-to-end Act as the principal technical adviser to engineering, infrastructure, trading, and operational teams, offering guidance on emerging threats, modern defensive techniques, and secure design patterns Partner closely with internal teams to embed security considerations into new systems and services without hindering performance or workflow Lead the design, rollout, and iterative refinement of … Lead cloud security assessments across the firm’s Azure and AWS environments, identifying misconfigurations, excessive permissions, insecure interfaces, and other weaknesses Work with cloud and DevOps teams to design and implement remediation steps - covering IAM refinement, network segmentation, encryption practices, API security, and data access controls Promote strong cloud security hygiene across the … organisation, ensuring new deployments follow best practice and remain compliant with internal and external standards Contribute to upcoming security engineering initiatives spanning areas such as application whitelisting, secure development patterns, data categorisation, and data loss prevention Produce clear security documentation, engineering guidance, and process materials to support consistency and long-term maintainability What You’ll Bring... 4-8 years More ❯

ActiveSpaces 2.x, EMS, Hawk, and Administrator , enabling end-to-end event-driven solutions. Strong skills in TIBCO ActiveSpaces for distributed in-memory storage integration with BE—including space design, indexing, queries, and caching strategies. Experience with event consumption, enrichment, correlation, deduplication, and rule execution logic to support enterprise process automation. Ability to work independently and in teams, with … demonstrated adaptability to new concepts and technologies . Exposure to complete SDLC , including requirements gathering, design reviews, development, testing, deployment, production monitoring, and enhancement cycles. Experience participating in architecture discussions and solution design workshops for CEP-based integration strategies. Hands-on experience integrating BE solutions with relational databases like … Oracle, IBM DB2, and SQL Server , including data caching and reference lookups. Strong background in object-oriented design, J2EE concepts, RUP, UML, and enterprise design patterns relevant to event-driven and rule-based systems. Proficiency with XML, XSD, DTD, XPath, and XSLT , especially for message and rules configuration. Expertise in Web Services (SOAP/WSDL More ❯

implementing such a crucial layer of email protection clearer, simpler and more secure. The OnDMARC team is a consolidated mix of experts in Product, Frontend, Backend, Testing and Design that work together as a cross-functional team to continuously improve our OnDMARC product for performance, reliability and functionality. With a fair amount of tech debt and a long … Go. We believe in using the right tool for the right problem and regularly use different programming languages. You possess a strong understanding of cloud computing, microservices, API design, and event-driven architectures. You are proficient in writing unit and integration tests and have experience with NoSQL databases like Mongo … and version control systems such as Git . With excellent problem-solving skills and attention to detail, you demonstrate a solid understanding of software development principles, design patterns, and best practices with experience in containerization and orchestration tools like Docker and Kubernetes. You are enthusiastic about observability, and take charge of features delivered by monitoring their functionality More ❯

international team, solve complex modeling and optimization challenges, and have the flexibility to work from the UK, the Netherlands, or (where appropriate) remotely. What will you be doing? Design, develop, and maintain robust, well-structured, and well-documented Python-based analytics and optimization modules for our Pulse product. Implement and optimize algorithms for econometric marketing mix modeling, forecasting … and real-world forecasting challenges. Ensure high code quality through thorough unit and integration testing, promoting long-term stability and maintainability. Apply SOLID principles and appropriate design patterns to ensure scalable and maintainable architecture. Work with modern technologies including SciPy, NumPy, Pandas, SQL, cloud platforms, Docker, Kubernetes, and CI/CD tools. Collaborate with cross-functional teams More ❯

demonstrate high-quality software development expertise, responsible for developing a secure, high-performance code. You will be confident with the software development life cycle (SDLC) from preliminary system design through to development, onto tests and deployment. We want someone who is passionate and remains curious, always asking why, and why not, and not afraid to have a voice. … Lastly, we want you to get to know the three pillars of our culture: ambition, accountability, and impact – to live and breathe it. Objectives (6-12 months) Software Design and Development Take new feature documentation and tickets from the Product Team and develop high quality code, often leading the implementation of the feature ready for testing. Work with … well-structured code. Understand Object Orientated software development principles such as inheritance and polymorphism. Knowledge of the software development process and related technologies. Good knowledge of Design Patterns, Software Engineering Principles and Best Practice Knowledge of configuring and supporting Dynamics CRM including writing custom code is a benefit. You Confident managing multiple projects, ensuring timely delivery of More ❯

platforms (e.g., Bloomberg, Tradeweb) Understanding of financial markets, particularly Rates and Credit bonds/derivatives Oustanding experience and knowledge with ION platform Expertise in object-oriented design patterns and SOLID principles Experience with functional programming concepts. Proven track record in Agile development environments Excellent problem-solving and analytical skills Experience with Spring Framework and RESTful API Cloud More ❯