Client Server

About the Company

At Client Server, we are driven by technology and powered by people.

We are a leading technology recruitment consultancy, specialising in a vast range of technology roles in London, the UK, Europe, and the USA.

Our focus is finding exceptional candidates for exceptional organisations. These include technology leaders, innovative start-ups, hedge funds, banks and consultancies.

Listed Jobs

Company Name

Client Server

Job Title

Sales Engineer - Mechanical Engineering

Job Description

**Job Title:** Sales Engineer – Mechanical Engineering **Role Summary** Provide technical sales support for a scientific software platform, crafting complex proposals, engaging prospects, and delivering product presentations while collaborating with cross‑functional teams on a 12‑month fixed‑term basis. **Expectations** - Execute end‑to‑end commercial proposal development. - Drive business development activities and client engagement. - Manage multiple priorities with minimal supervision. - Deliver compelling online presentations and attend key industry events when required. **Key Responsibilities** 1. Prepare and author large, technical commercial proposals tailored to client needs. 2. Coordinate cross‑departmental contributions to ensure on‑time, high‑quality deliverables. 3. Prospect new business, initiate outbound outreach, and qualify sales opportunities. 4. Conduct product demonstrations and client presentations, primarily via virtual platforms. 5. Participate in conferences, trade fairs and client meetings as scheduled. 6. Maintain accurate sales pipeline and documentation in the CRM system. **Required Skills** - Strong technical writing and proposal development experience. - Proficient in English (spoken & written) with advanced Portuguese language skills. - Excellent organization, planning, and deadline management. - Ability to convey technical concepts to non‑technical audiences. - Independent, self‑motivated with the capacity to manage multiple tasks. **Required Education & Certifications** - Bachelor’s, Master’s, or Ph.D. in Mechanical Engineering, Electrical Engineering, Electromechanical Engineering, or a related technical discipline. - Relevant certifications in technical sales or proposal management are an advantage.

Swansea, United kingdom

Hybrid

23-11-2025

Company Name

Client Server

Job Title

C++ Software Engineer Windows - Finance

Job Description

Job Title: C++ Software Engineer (Windows) – Finance Role Summary: Build and maintain high‑performance, real‑time low‑latency market connectivity systems in C/C++ on Windows, supporting exchange data feeds that handle billions of messages daily and deploying scalable services on AWS. Expectations: - Develop, test, and ship robust C/C++ code within an Agile team. - Own all stages of the software lifecycle, from design to production monitoring. - Collaborate with global engineers to deliver mission‑critical connectivity tooling. Key Responsibilities: - Design, code, and optimize real‑time, low‑latency applications on Windows. - Expand and maintain TCP/IP, UDP, and multicast networking components. - Build high‑performance data pipelines and core transport protocols. - Deploy scalable services to AWS and ensure operational stability. - Participate in code reviews, sprint planning, and continuous improvement activities. Required Skills: - Proficiency in C/C++ development on Windows (C# experience a plus). - Strong grasp of computer‑science fundamentals: multithreading, OOP, data structures, design patterns. - Knowledge of networking protocols (TCP/IP, UDP, multicast). - Experience with low‑latency system design and optimization. - Comfortable with Agile methodologies and cross‑functional collaboration. - Excellent verbal and written communication abilities. Required Education & Certifications: - Bachelor’s degree in Computer Science, Software Engineering, or related field (or equivalent professional experience).

Cambridge, United kingdom

On site

27-11-2025

Company Name

Client Server

Job Title

C++ Developer Windows Networking

Job Description

Job Title: C++ Developer – Windows Networking Role Summary: Deliver high‑performance, low‑latency Exchange Connectivity software on Windows, building and maintaining data feeds and transport protocols for a global market data provider. Expectations: - Design, implement, and optimize C++ and C# components for real‑time data transmission. - Participate in the full software development life cycle in an Agile environment. - Ensure scalability and reliability of systems handling billions of messages daily. Key Responsibilities: - Develop and maintain Windows‑specific C++ modules for data feed handling. - Implement networking protocols (TCP/IP, multicast) and custom transport layers. - Debug, profile, and tune code for performance and latency targets. - Collaborate with cross‑functional teams (architecture, QA, ops) to deliver robust releases. - Contribute to architectural decisions and design patterns for scalable systems. Required Skills: - Strong C/C++ programming on Windows OS. - Proficient in networking fundamentals (TCP/IP, UDP, multicast). - Solid understanding of multi‑threading, concurrency, and performance optimization. - Object‑oriented design, data structures, and design patterns. - Experience with the full SDLC in Agile settings. - Excellent written and verbal communication; collaborative team player. Required Education & Certifications: - Bachelor’s degree in Computer Science, Engineering, or equivalent. - (No mandatory certifications, but knowledge of relevant industry standards is a plus.)

Manchester, United kingdom

Remote

08-12-2025

Company Name

Client Server

Job Title

Senior Full Stack Engineer React TypeScript

Job Description

**Job Title** Senior Full Stack Engineer – React/TypeScript **Role Summary** Lead end‑to‑end development of a high‑throughput fintech platform, focusing on scalable React/Redux front‑end interfaces and robust Node.js/TypeScript back‑end services. Drive architecture decisions, code quality, and delivery of new feature releases in a remote, collaborative setting. **Expectations** - Act as a technical ambassador for full‑stack best practices. - Mentor junior developers and review code. - Own design, implementation, and maintenance of critical modules. - Engage with product, UX, and DevOps teams to ensure seamless delivery. **Key Responsibilities** - Design, develop, and optimize React/Redux components using TypeScript. - Implement secure, high‑performance REST/GraphQL APIs in Node.js with TypeScript. - Integrate third‑party services (payments, data feeds, authentication). - Conduct code reviews, unit/integration testing, and continuous integration workflows. - Monitor application performance, troubleshoot issues, and refactor legacy code. - Collaborate on infrastructure decisions (cloud, containers, CI/CD). - Facilitate knowledge sharing and documentation for the engineering team. **Required Skills** - 5+ years of professional full‑stack development experience. - Deep proficiency in React, Redux, and modern JavaScript/TypeScript patterns. - Strong command of Node.js, Express/Koa, and API design principles. - Experience with automated testing (Jest, React Testing Library, Supertest). - Familiarity with CI/CD pipelines (GitHub Actions, Jenkins, GitLab CI). - Knowledge of cloud platforms (AWS, Azure, or GCP) and containerization (Docker, Kubernetes). - Familiarity with data storage (SQL/NoSQL) and ORM/ODM tools (Prisma, TypeORM). - Excellent communication and problem‑solving skills. **Required Education & Certifications** - Bachelor’s degree in Computer Science, Software Engineering, or a related field. - Optional: Certifications such as AWS Certified Developer or Microsoft Certified: Azure Developer Associate.

City, United kingdom

On site

Senior

19-12-2025