Client Server

2 weeks ago

Backend Software Engineer Python R&D

UK

Backend Software Engineer / Developer London / WFH to £85k Are you a backend focused technologist who enjoys problem solving and working on complex systems at the cutting edge of technology? You could be progressing…

AI Cybersecurity

2 weeks ago

Backend Software Engineer Python ML AWS

RemoteUK

Agile AWS Databricks Design Patterns Machine Learning +6 skills

Backend Software Engineer / Developer (Python Machine Learning AWS) Remote UK to £90k Are you a data savvy Backend Software Engineer with experience of implementing ML algorithms into production? You could be…

2 weeks ago

Senior Java Backend Engineer — AI-Assisted RealTime Trading

UKSenior

Senior Java backend engineer modernising a high-performance real-time trading system onsite in Newcastle upon Tyne. Day to day: hands-on backend Java development, architectural input on latency-sensitive design, and collaboration with Front Office and engineering teams, using AI tools like Claude to speed up delivery.

AI Java

Front Office C++ Backend Engineer — Low-Latency Trading

Open 18d RemoteUK

Backend C++ engineer redeveloping a core equity trading system for the EMEA market, tackling high-volume data and low-latency challenges on Linux. Front-office role with direct trader exposure and design-to-delivery ownership, paying up to £125k plus bonus, based in London with a weekly work-from-home option.

C++ Linux

up to 125K £

Senior Backend Engineer: Python, ML & AWS (Remote UK)

Open 18d RemoteUKSenior

AWS Machine Learning Python

Senior Backend Engineer building Python backend services to help produce and deploy machine learning models into production on AWS, working day to day with data scientists and ML engineers across the full ML lifecycle. Fully remote within England/UK, up to £90k, with flexible hours and mentoring opportunities.

up to 90K £

C++ Backend Engineer - Low-Latency Trading Systems

Open 19d UKSenior

HireHi is seeking a senior C++ backend engineer to redevelop a core equity trading system for the EMEA market. You will design, build, and optimise large data‑intensive backends running on Linux, collaborating directly…

C++ Linux

Backend Developer Golang Node Pub / Sub

Open 21d UK

AI Cloud Distributed Systems Event Driven Architecture Kafka +3 skills

Overview As a Backend Developer, you will shape the core messaging platform that powers real-time interactions at scale. You’ll design and build highly scalable distributed systems and low-latency Pub/Sub components…

Lead Backend Engineer - Technologist

Open 21d UKLead

API Api Design AWS Azure Cloud +13 skills

Overview In this role you will lead backend engineering to design and implement core application logic, APIs and microservices for data processing and integrations, while ensuring secure, reliable server environments.…

Lead Backend Engineer - Technologist

Open 22d UKFull-timeLead

API AWS Azure CI/CD Cloud +16 skills

Lead Backend Engineer joining the consulting division of Client Server's Newcastle office, serving a scaling FinTech. Day to day: designing backend logic, building APIs and microservices (Python, TypeScript), maintaining secure server environments, mentoring engineers, and gathering requirements directly with clients. Full-time onsite, salary to £130k + bonus.

up to 130K £

Lead Backend Engineer - Python/TypeScript (Onsite, Newcastle)

Open 22d UKLead

API C# Fintech Python TypeScript

A hands-on lead role designing and building core applications and APIs for clients at a FinTech consultancy, based onsite in Newcastle. The engineer oversees secure server environments and architecture while mentoring others, working across Python, TypeScript, and C#.

Client Server Ltd.

Senior C# Backend Engineer: API, Microservices, WFH

Open 25d UKSenior

AI API AWS Cloud C# +4 skills

Client Server Ltd. in Bracknell, Berkshire seeks a senior backend C# Developer to lead the rebuild of a payments platform. You’ll own backend services, build robust APIs with C# .Net Core, and influence architecture…

TypeScript Backend Engineer: Cyber Security | Hybrid/Remote

Open 25d UK

A backend software engineer designs and builds TypeScript backend services for a cybersecurity company's customer portal in Cambridge, taking ideas from rapid prototypes to production in a fast-paced R&D environment. Hybrid working with Cambridge office presence and work-from-home options.

TypeScript

Senior C# / .NET Core Backend Engineer – FinTech (Newcastle)

Open 26d UKSenior

Senior C# / .NET Core backend engineer at Client Server Limited, working on-site in Newcastle upon Tyne to build complex FinTech-grade systems. You own technical projects and contribute across the full development lifecycle, with a salary of up to £110k+ plus bonus, healthcare, and pension.

Lead Python Backend Engineer (APIs, FastAPI) – Hybrid

Open 26d UKLead

API CI/CD Cloud FastAPI Fintech +1 skills

Lead a small London tech team building and refactoring a core banking platform, splitting time 50/50 between architecture/design and people management. Day-to-day work spans API development with Python/FastAPI, GCP cloud services, and CI/CD in a hybrid fintech setting.

Senior Python Backend Engineer - AI Cybersecurity R&D

Open 28d UKSenior

AI C++ Prototyping Python Rust +1 skills

Client Server is seeking a Senior Python Developer in Cambridge to join a Greenfield platform addressing AI-driven cyber threats. You will design and build high-performance Python backends, with opportunities to work…

Hybrid Backend Engineer (TypeScript) - Cybersecurity

Open 28d RemoteUK

Client Server is seeking a Backend Software Engineer / Developer (TypeScript) in Cambridge with work-from-home flexibility up to £70k. The role focuses on backend TypeScript services for the customer portal, within a…

Cybersecurity TypeScript

last month

Senior C# Backend Engineer • .NET Core (Onsite, Newcastle)

Open 30d UKSenior

Senior C# developer leading backend work on the company's core platform using .NET Core, owning technical projects and delivering high-quality code across the full SDLC with a small onsite team in Newcastle. Onsite hours 09:00-18:00, salary up to £110k plus bonus.

Backend Engineer - Go/Node, Distributed Systems + Equity

Open 30d UK

AI Distributed Systems Node.js

A backend engineer builds scalable, low-latency distributed systems in Go and Node.js for a real-time messaging platform used by developers and businesses worldwide. The role offers hybrid/remote working with North London office meetups, plus equity.

last month

Cybersecurity Backend Engineer (TypeScript) – WFH Cambridge

Open 31d UK

Client Server is seeking a Backend Software Engineer / Developer (TypeScript) to join their team in Cambridge, offering a competitive salary of up to £70k plus bonuses. You will develop backend services for a customer…

TypeScript