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Client Server

246 jobs

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246 jobs Posted Sort

Realtime Backend Engineer (Go/Node) – Remote/Hybrid

NewBe an early applicant HybridUK

Backend engineer building a real-time messaging platform (Pub/Sub) using Go and Node.js at a high-growth tech company, working remotely or hybrid from London. Day to day involves designing scalable messaging infrastructure and delivering production-grade software with autonomy.

Backend Developer Golang Node Pub / Sub

NewBe an early applicant UKFull-time

Backend developer building the core of a high-growth real-time messaging platform — distributed systems, low-latency Pub/Sub, state synchronisation and AI communication infrastructure — mostly remote with monthly meetups at a North London office. Core stack: Go and/or Node.js, with Kafka/RabbitMQ/NATS experience a plus.

AI Cloud Distributed Systems Event Driven Architecture Go +5 skills

Lead Python Developer - Hybrid FinTech Platform

NewBe an early applicant HybridUKLead

Lead Python Developer at Client Server in London, blending hands-on engineering on a modern Python-based platform with technical leadership — mentoring developers, driving engineering standards and guiding architecture in a fast-moving FinTech environment. Hybrid role with up to two WFH days per week.

Azure Devops Platform Engineer Self-Service Ai Tools Madrid

NewBe an early applicant Europe

Platform engineer who designs and builds scalable internal Azure platforms and self-service developer tooling, focusing on cloud-native infrastructure and workflow automation. Day-to-day work centers on Azure and DevOps practices to support internal development teams.

Automation Azure Cloud Cloud Native

Data Engineer: Python + SQL on Azure Databricks (Madrid)

NewBe an early applicant On-siteEurope

Onsite Data Engineer in Madrid who will migrate the company's core data platform to Azure Databricks, manage third-party data ingestion, and introduce streaming capabilities. Day-to-day work uses Python, SQL, Spark, PySpark and Pandas on a small team collaborating with an Investor Hedge Fund partner.

Azure Data Ingestion pandas PySpark Python +2 skills

Data Engineer – Python, SQL & Azure Databricks (Madrid)

NewBe an early applicant Europe

Onsite Data Engineer in Madrid for an investment management startup backed by a hedge fund. You will migrate the core data platform to Azure, manage third-party data ingestion, and work with a small team to improve data quality and enable event streaming using Python, SQL, and Azure Databricks. Salary up to €130,000.

Azure Data Ingestion Data Quality Databricks Python +1 skills

Java Developer - Trading Systems

NewBe an early applicant UK

Senior hands-on Java Developer role, onsite in Newcastle upon Tyne, working on a new client engagement to transform a complex C++ legacy trading system at a professional services company. Suited to someone with backend development experience in finance or trading environments; salary up to £120k.

Software Engineer C# .Net - Sports Trading

Software Engineer / Developer (C# .Net) London onsite to £90k Are you an experienced C#, backend focussed Software Engineer? You could be progressing your career in a hands-on, backend focussed Software Engineer role…

Backend Software Engineer Python C# AI

Backend Software Engineer / Developer (Python C# AI) London / WFH to £100k Are you a Backend Software Engineer with Python and / or C# coding skills combined with a strong knowledge of software engineering best…

Agile AI C# Python

Principal Backend Engineer Java Spring Boot AWS

New UKPrincipal

Principal Backend Engineer at global tech consultancy Client Server, leading the design and delivery of complex transformation projects primarily for financial services clients in London. Day to day involves technical ownership, project leadership, and direct client work, building backend services with Java, Spring Boot, and AWS, up to £120k.

AWS Java Spring

Software Engineer Full Stack - Start-up

Software Engineer / Full Stack Developer (Node TypeScript React Azure) Bristol / WFH to £95k Are you a senior Software Engineer looking for a genuine Greenfield opportunity where you'll shape architecture from day one?…

Azure React TypeScript

Senior Software Engineer C# Python AI

Senior Software Engineer / Developer (C# Python AI) London / WFH to £100k Are you a Senior Software Engineer with C# and / or Python coding skills combined with a strong knowledge of software engineering best practices…

Agile AI C# Python

Java Developer - Trading Systems

Senior hands-on Java developer role in Newcastle to transform a complex C++ legacy trading system into a modern Java application, collaborating closely with front-office trading teams at a professional services company. Salary up to £120k, onsite.

Python Software Engineer Cyber Security

Python Software Engineer / Developer London / WFH to £80k Do you have strong backend Python software development experience? You could be progressing your career at the world's most advanced cybersecurity technology…

AI Cybersecurity Python

Data Analytics Lead - Azure

Data Analytics Lead (Azure PowerBI SQL) Watford / WFH to £100k Do you have strong Data Analytics knowledge? Looking for an opportunity to take ownership and shape the data strategy of a growing company? You could be…

AI Analytics Automation Azure CRM +3 skills

Software Engineer Python Django SQL - FinTech

Software Engineer / Developer (Python Django SQL) London onsite to £80k Are you a data savvy Python Developer who enjoys cross team collaboration and has a keen interest in financial markets? You could be progressing…

Django Fintech Python SQL

C# Developer / Technical Lead .Net - FinTech

New HybridUKLead

A senior, hands-on technical lead role building complex C#/.NET desktop applications for a global fintech, based in Reigate with hybrid working (3 days a week from home) and a salary up to £100k plus a ~20% bonus.

C# .NET Fintech

Principal C# Developer .Net AWS - FinTech

New UKPrincipal

Principal C# Developer / Engineer (C# .Net AWS Python) London / WFH to £120k Would you like to join a growing and profitable scale-up that is viewed as a leading FinTech disruptor in a senior role that will allow you a…

Agile AWS C# .NET Fintech +1 skills

Application Support Engineer / Consultant

Application Support Engineer / Consultant London to £50k Are you a technically minded client facing Application Support Engineer professional who enjoys working directly with customers, solving complex technical…

Python Developer / Team Lead - FinTech

Python Developer / Team Lead London / WFH to £120k Are you a skilled Python Developer with team leadership experience? You could be progressing your career at a well-funded and profitable FinTech start-up. As a Python…