15 of 15 Client/Server Jobs in the City of London

Backend Software Engineer / Developer (C# .Net Core Cloud CQRS) London / WFH to £80k Are you a technologist with strong backend C# .Net skills? You could be progressing your career at in a senior, hands-on role Backend Software Engineer role at a successful and scaling Retail FX Brokerage working on complex and interesting Greenfield systems with … technology stack in a modern development environment with microservices. There are many technical challenges to explore, the initial project will be to build a KYC system from scratch. Location / WFH: You'll join colleagues in the London office Monday to Wednesday with flexibility to work from home Thursday and Friday. About you: You have strong C# .Net Core … backend development experience You have a good knowledge of microservices and Cloud (AWS or Azure) experience, ideally you'll have some experience with Docker / Kubernetes, EKS You have a good understanding of CQRS and event driven architectures Ideally you will also have some front end development experience with JavaScript / TypeScript / React.js or Angular You More ❯

Senior Full Stack Developer / Engineer (Java Angular) London / WFH to £90k Are you full stack technologist? You could be progressing your career in a hands-on, impactful, Senior Full Stack Developer role, working on a 'tech for good' product that is helping to drive efficiencies for the NHS, the core product is a highly complex real … time shift rota application, hosted on AWS and available via the web or mobile device (iOS / Android). As a Senior Full Stack Developer you will play a crucial role in re-architecting and enhancing the scheduling platform to a Java and Angular codebase (from Ruby and TypeScript). You'll design and develop scalable backend Java services … ll input into technical discussions and decision making, as a senior member of a small team where you'll be able to influence best practice and technology choices. Location / WFH: You'll join colleagues in the London, City based offices 3-4 days a week with some flexibility to work from home 1-2 days. About you: You More ❯

Senior C# Developer / Software Engineer (Windows Desktop Trading Systems) London to £140k Are you a Senior C# Developer with strong Windows desktop development skills combined with banking / financial services experience? You could be progressing your career at a Hedge Fund with over $10 billion under management. As a Senior C# Developer you will work on critical … focus on building C#, WinForms, WPF desktop applications and design and implementation of scalable, service orientated architectures (SOA) but will also gain exposure to web applications using React and / or Angular. This is a senior, hands-on position, you'll collaborate with colleagues in the US and Canada and be the sole resource on these systems for the … UK. Location / WFH: You'll join colleagues in the London office with flexibility to work from home once a week; there's a friendly and collaborative environment with casual dress code and a range of facilities. About you: You have strong C# desktop development experience on Windows within a banking or financial services environment You have a strong More ❯

Senior Software Engineer / Developer (Full Stack JavaScript) London to £100k Opportunity to progress your career in a senior, hands-on Software Engineer role at a scale-up tech company, that enables smart matching for commercial van drivers and consumers, via job bidding and route optimisation, streamlining processes and delivering CO2 carbon neutral targets, the company has been established … for the job as well as own your own DevOps and deployment. There's an emphasis on getting stuff done and immediate business impact, alongside longer term strategy. Location / WFH: There's a hybrid work from home model with three days a week in the Hammersmith office and the other two work from home. When in the office … and free breakfast. About you: You have strong full stack JavaScript development skills and are happy to work on projects that could be weighted either way or a 50 / 50 split You have experience with JavaScript frameworks they use Vue.js but Angular or React experience is fine, you will also have experience with Python, Node.js and TypeScript You More ❯

will lead to your success with us. This position will work daily with Regional Sales Managers and Channel Account Executives. BlueVoyant provides our clients with both consultative (fixed price / deliverable) and ongoing (managed) security services, so the ability to communicate and present well is important. Role Responsibilities: Actively participate in the sales process and work closely with the … or more of the following: Next-Generation Anti-virus, Endpoint Detection and Response (EDR), Security Orchestration, Automation, and Response (SOAR), Security Information and Event Management (SIEM, particularly Splunk and / or Splunk Cloud), firewalls, and other core security products. (e.g. Crowdstrike, Carbon Black, Splunk, and / or the Microsoft security technologies) A solid working knowledge of Windows Azure … Active Directory, Windows OS, Mac OS, Virtualization, SQL Server, networking protocols, certificates, virtual and physical client / servers. Some hands-on experience with one or more of the following: Microsoft Azure Sentinel, Microsoft 365 Defender, and Azure Defender suite of security solutions (i.e. Defender for Endpoint, Defender for Identity, Defender for Office365, MSFT Cloud App More ❯

SRT, etc. (nice to have) Knowledge of audio streaming development. Familiarity with AI speech-to-speech technology. Source control (GIT). Excellent communication skills. Understanding of client / server architectural principles. Hands-on experience in: C++ SIP signaling protocols WebRTC (nice to have) Audio streaming development AI speech-to-speech technology Experience in architecting web … OAuth Azure DevOps feature stack SDLC DotNet Core 3 and above, C# JavaScript HTML CSS By applying, I confirm I have read and accept TransPerfect's Privacy Policy: https: / / www.transperfect.com / about / data-privacy-recruiting. More ❯

C++ Developer / Software Engineer (TDD FX Options) London to £100k Are you a bright, ambitious C++ Developer with an eagerness to learn and progress your career working on complex financial trading systems? You could be joining the Investment Management arm of a global bank. As a C++ Developer you will design and develop full stack systems for new … to build the solutions they require. You'll work across the full software development lifecycle including assisting with architecture of new solutions, you'll be working with C++ 14 / 17 with a TDD environment but will also gain exposure to Python, TypeScript and React. You'll join a small, highly talented team, working across the full development lifecycle … and will be supported to progress your career. Location / WFH: You'll be based in the London office and have flexibility to work from home once a week. About you: You have achieved a 2.1 or above from a top tier university (e.g. Russel Group / Oxbridge) in Computer Science or similar technical or numerate discipline You More ❯

Java Developer / Backend Software Engineer / Developer WFH to £100k Are you a skilled Java Developer with low latency trading systems experience? You could be progressing your career at a global market data and trading platform provider for cryptocurrency markets. As a Java Developer you will develop, test and maintain high-quality, low-latency Java applications handling … day, collaborating with cross-functional teams to design systems that meet business and regulatory requirements. You'll seek to continuously improve system performance and scalability, implement automated testing, CI / CD pipelines and document system workflows, architecture and design decisions. Location / WFH: You can work from home from anywhere in the UK on a fulltime basis … with some flexibility around start / finish times - please note: you must have the right to work in the UK and be UK based. About you: You have strong Java development experience including concurrency, garbage collection, low level performance optimisation, data structures and memory efficient design patterns You have experience with low latency systems, particularly OMS (Order Management Systems More ❯

now looking for a Senior Backend Game Engineer to help design and build scalable systems that power seamless multiplayer experiences. You’ll be embedded directly with a major client studio, working alongside talented engineers, designers, and DevOps teams to bring ambitious projects to life. What you’ll do: Architect and build backend systems for multiplayer online games — authentication … with cloud platforms (AWS, Azure, or GCP) Familiarity with matchmaking, player sessions, anti-cheat systems Database experience across SQL and NoSQL (PostgreSQL, Redis, MongoDB) Hands-on with microservices, Docker / Kubernetes, and server orchestration Bonus if you have: Familiarity with PlayFab, AccelByte, Nakama, or similar GBaaS Experience working with console / PC network platforms (Xbox, PSN … Steam, etc.) Knowledge of UE5’s networking model or client-server architecture CI / CD and modern DevOps workflows Benefits: Salary up to £80k Fully remote opportunity able to be worked from anywhere in the world. A chance to work with top AAA studios. A well-established career ladder that offers chances for advancement, more More ❯

global trading firm seeking an IT Operations Engineer to join a fast-paced, engineering-led tech function. This is a hands-on support and systems role spanning desktop, server, and network infrastructure across Linux, Windows, and macOS environments. You’ll provide critical support to internal users, manage systems configuration and deployments, and contribute to automation projects that reduce … of core infrastructure and end-user environments. The role combines real-time problem solving, infrastructure maintenance, and technical project delivery, including scripting and automation. This is a hybrid operations / engineering role with real visibility across systems, platforms, and business-critical workflows. Key Responsibilities Respond to support tickets and resolve hardware, software, and infrastructure issues across a diverse user … problem-solving skills and a natural service mindset Solid understanding of IT infrastructure, across networking, system administration, and endpoint management Hands-on experience with Windows OS (client / server), Active Directory, and enterprise IT environments Clear written and verbal communication, especially for supporting non-technical users Comfortable working across platforms, experience with Linux / More ❯

document, and refine business and non-functional requirements to align with stakeholder goals. Map workflows, analyse processes, and propose solutions to enhance efficiency. Translate user needs into use cases / user stories for clear project delivery. Collaborate with technical teams and vendors to integrate cloud technologies. Support testing, implementation, and post-launch reviews to ensure compliance and cost-effectiveness. … Develop training programs and technical documentation for system enhancements. Maintain proactive communication with stakeholders and drive innovative solutions. Experience / Skills Required: Bachelor’s Degree in Engineering, Technology, or related field. 5+ years in business process analysis; prior business analyst experience preferred. Strong skills in documenting requirements, process mapping, and use case development. Familiarity with Waterfall / Agile … methodologies and cloud / client-server architectures. Proficient in MS Visio, PowerPoint, and Excel; experience with international teams a plus. Excellent communication, stakeholder management, and problem-solving skills. Knowledge of legal services or IT industry trends is advantageous. Role Details: Permanent Competitive salary and benefits Hybrid working – 3 days in office per week Central London More ❯

Golang Developer / Backend Software Engineer (Go Kafka API) London / WFH to £110k Do you have a deep knowledge of Go / Golang combined with software architecture and design skills? You could be progressing your career as a Backend Software Engineer at a start-up payments technology company that is revolutionising the payments industry to Africa … scalability and reliability. You'll join a small, collaborative, Agile team working on 2 week sprints, you'll be a key part of tech discussions and decision making. Location / WFH: You'll join colleagues in the London, Canary Wharf offices three days a week (also the possibility to be remote in the UK). About you: You're … an experience backend focussed Software Engineer with strong commercial Go / Golang development experience You have experience with system design, event driven architectures, Kafka, API development You have a product based mindset and commercial acumen You have a thorough understanding of Computer Science fundamentals such as OOP, Design Patterns, Data Structures You have experience of working on scalable, distributed More ❯

Onsite & Remote IT Support Technician ________________________________________ Location: Central London Salary: £35,000 ________________________________________ About the company Our client is a well-established Managed Service Provider based in Central London. Position Overview You'll be the primary point of contact for clients, providing both on site and remote support. This role is for someone who enjoys both desk work and outgoing … Responsibilities * Client Interaction: Engage directly with clients, offering solutions and support for IT-related issues. * Project Management: Oversee projects from initial diagnostics to final resolution, including onboarding / offboarding staff, and conducting inductions. * Technical Mastery: Handle desktop, application, and network support, including installation of networking equipment like switches, routers, and firewalls. * Networking Expertise: Work with TCP / … Macs in a business environment. * Cloud and Software: Familiarity with managing Office 365 or G Suite environments. * Networking Knowledge: Proficient in networking hardware, with a strong understanding of TCP / IP protocols and the ability to troubleshoot network issues. * Security Skills: Experience with firewalls, security software, and modern internet technologies. * Experience in Hospitality: Prior experience in the hospitality sector More ❯

basis. About you: You have mobile application development experience using React Native You also have experience with React.js, Redux and TypeScript You have a strong appreciation for good UI / UX design You're keen to explore and use AI tools such as copilot You're comfortable taking ownership and building systems from scratch Finance experience would be great … day snacks and breakfast at modern well equipped offices Self development and career growth opportunities Apply now to find out more about this React Native Developer opportunity. At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come More ❯

training and maintain support documentation Share Salesforce knowledge across the team What We’re Looking For: Proven experience in Salesforce administration or support Strong understanding of cloud and client-server technologies Experience with CRM and sales order processing systems Salesforce ADM201 certification (desirable) Excellent communication and stakeholder management skills Ability to work independently and manage competing More ❯