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Client Server

246 jobs

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246 jobs Posted Sort

Client Server Ltd.

Java Developer in Test SDET - Finance Consultancy

NewBe an early applicant HybridUK

Java SDET at a global technology consultancy serving financial services and energy clients: designing test automation frameworks, building UI/API automation (Selenium, Cypress, Playwright), integrating tests into CI/CD, and using AI-enabled tools to boost quality and productivity. Hybrid role based in London, paying £75k–£90k.

AI API Automation AWS Azure +15 skills

Client Server Ltd.

Data Engineer Quant Finance

NewBe an early applicant UK

A hybrid London-based Data Engineer role at a scaling investment-research tech company, building and testing data pipelines, data models and tooling so quant and data science teams can work with large, complex financial datasets. Core stack is Python and SQL, with a path toward more quantitative/data science work over time.

Data Engineering Data Modeling Data Pipelines Data Quality Data Science +2 skills

80K – 120K £

Client Server Ltd.

Data Engineer – Quant Finance Pipelines (Remote)

NewBe an early applicant UK

A data engineer builds data pipelines and infrastructure for quants and data scientists at a scaling investment research tech company in London, working across the full data lifecycle. Core stack is Python and SQL, with a gradual move into quantitative projects; hybrid London office work three days per week.

Data Pipelines Python SQL

Client Server Ltd.

Senior Java Developer – RealTime Trading (Onsite Newcastle)

NewBe an early applicant UKSenior

Senior Java Developer onsite in Central Newcastle (Mon-Fri) modernising a legacy C++ trading system into a Java-based real-time trading platform. Day to day is backend, multithreaded, low-latency Java development with strong financial-markets knowledge, working with Front Office teams and using Java and Claude.

Client Server Ltd.

Java Developer - Trading Systems

NewBe an early applicant UKFull-time

Senior hands-on Java developer in Central Newcastle transforming a complex legacy C++ trading system into a modern Java application, building robust, low-latency, real-time trading systems alongside front-office trading teams. Core stack is multithreaded Java with AI tooling like Claude.

90K – 120K £

Java Developer - Trading Systems

NewBe an early applicant UKFull-time

Senior hands-on Java developer joining a client engagement to transform a complex C++ legacy trading system into a modern Java application. Day to day: building robust, secure, real-time trading systems with multithreaded Java, collaborating with Front Office trading teams and engineers, and using AI tools like Claude.

Senior Backend Software Engineer Python

NewBe an early applicant HybridUKSenior

Senior backend engineer role in Central London (The City) building Python services, with a focus on FastAPI, distributed systems, and AWS-based infrastructure (Terraform, Docker, PostgreSQL, DynamoDB, CI/CD via GitHub Actions). Onsite, salary £40,000–£70,000 per year.

AI AWS CI/CD Cloud Distributed Systems +9 skills

Senior Information Security Engineer - London

NewBe an early applicant UKSenior

A senior information security engineer based in Central London, working hands-on with the Microsoft security stack (Defender, Entra, Purview) covering IAM, endpoint security, incident response, and data security, while coordinating with an outsourced SOC or managed security provider.

AI IAM Network Security

Lead C# Developer .Net FinTech

NewBe an early applicant HybridUKLead

A lead C#/.NET Core backend developer role at a FinTech in Central London, focused on hands-on technical ownership of features on large, scalable systems rather than people management. Pays £40,000–£70,000 per year, onsite.

Agile Azure CI/CD Cloud C# +8 skills

Java Developer - Trading Systems

NewBe an early applicant UKFull-time

Senior hands-on Java developer role in Central Newcastle, transforming a complex C++ legacy trading system into a modern Java-based application for a client engagement. Day to day involves multithreaded, low-latency backend Java work in financial markets, using AI tools like Claude alongside Front Office trading, engineering, and product teams.

100K – 120K £

Application Support Engineer / Consultant

NewBe an early applicant

Salary: £40,000 - 70,000 per year Requirements: Experience in a similar technical, client facing role such as Application Support, Technical Support, Solutions Consultant, or Technical Account Manager Strong…

AI Pre-sales Stakeholder Management

Senior Software Engineer Python AWS Front Office

NewBe an early applicant HybridUKSenior

Senior backend engineer building and enhancing high-performance front-office trading systems and cloud infrastructure in Python on AWS for a Central London financial firm. Day to day involves DevOps/CI-CD and containerised delivery, occasional front-end work, and owning the software delivery lifecycle end to end.

Automation AWS CI/CD Cloud Containerization +2 skills

100K – 100K £

Full Stack Engineer Node React Azure

NewBe an early applicant HybridUK

An onsite Full Stack Engineer role in Central London building applications end to end with Node.js, TypeScript and React on Microsoft Azure. Day to day involves designing scalable cloud-native APIs, integrating enterprise systems with event-driven solutions, working with IaC and CI/CD pipelines, and using AI-assisted development tools.

AI API Automation Azure CI/CD +10 skills

Lead Software Developer - Finance

NewBe an early applicant UKLead

Lead a software development team in a finance/trading environment in Newcastle upon Tyne — running 1-2-1s, coaching, mentoring and driving project leadership — while building software in modern C# .NET Core (Python a plus) using modern engineering best practices.

100K – 100K £

Mobile Engineer, Flutter (FinTech)

NewBe an early applicant UK

A mobile engineer role building a fintech app in Flutter at a Newcastle Upon Tyne company. Day to day involves designing and developing the mobile application using Flutter (or similar), applying computer science fundamentals like OOP and design patterns, with an understanding of financial markets.

Design Patterns Fintech Flutter iOS OOP +2 skills

100K – 100K £

Backend Software Engineer Python Data R&D

NewBe an early applicant UK

Onsite backend engineer in Cambridge building Greenfield Python data/R&D systems for a well-funded medical technology startup developing terahertz sensing and imaging solutions. Day to day involves tackling complex problems like image processing alongside scientists and engineers, with a salary up to £55k.

Software Engineer Python SQL - Market Data

NewBe an early applicant UK

Software Engineer / Developer (Python SQL) London to £150k Are you a data savvy Software Engineer with strong Python coding skills? You could be joining a Hedge Fund with complex work and substantial bonus earning…

Data Engineering Distributed Systems Python SQL

Chief of Staff - Hedge Fund

NewBe an early applicant UKC-level

Chief of Staff London to £100k Are you a tech savvy Chief of Staff with finance domain experience? You could be progressing your career at a Hedge Fund with complex work and substantial bonus earning potential. As a…

Backend Software Engineer Python Data R&D

NewBe an early applicant UK

Onsite backend software engineer (Python, data/R&D) in Cambridge, UK, joining a well-funded medical technology start-up developing terahertz sensing and imaging solutions. You'll tackle greenfield R&D problems in image processing, machine learning, numerical simulation, databases, networking and interfacing, with a salary up to £55k.

Image Processing Machine Learning Networking Python

Data Engineer - Databricks, SQL & Python (Newcastle)

NewBe an early applicant UK

Data Engineer joining a fintech client onsite in Newcastle, building and maintaining data pipelines from external providers, automating data processes, and designing data models to support analytics and operations. Core stack is SQL, Databricks, and Python, working closely with front office teams.

Analytics Data Pipelines Data Quality Databricks Fintech +2 skills