/

Point your AI agent at freehire and let it find you a job. A CLI and an MCP server over the whole job API — no browser.

Get the CLI →

Client Server Limited

Jobs Hiring Closed Discussion

42 jobs

Posted Sort

42 jobs Posted Sort

Client Server Limited

Lead Backend Engineer - Technologist

NewBe an early applicant UKLead

Lead Backend Engineer at a scaling FinTech consultancy in central Newcastle (onsite, Mon-Fri): designing APIs and microservices, overseeing secure server environments, gathering client requirements, and mentoring the team. Broad tech stack including Python, TypeScript, C#/.NET, REST APIs, PostgreSQL, CI/CD and AWS/Azure/GCP; salary to £130k plus bonus.

API AWS Azure CI/CD Cloud +16 skills

Madrid Fintech Software Engineering Lead (Python/Ts) - Up To €120.000 A Year

Lead a team of software engineers in Madrid for a fintech consulting firm, working with Python and TypeScript while driving technical insights and collaborating with clients. On-site in Madrid, with salary up to €120,000 per year.

Fintech Python TypeScript

Client Server Limited

Senior Full-Stack Tech Lead – Ruby/TS/React, B2B SaaS, Remote

New HybridUKLead

Senior full-stack engineer / technical lead owning technical strategy and architecture for developer ecosystems, centered on API and SDK design. Day to day: driving the full development lifecycle with Ruby, TypeScript and React, mentoring engineers, reviewing contributions, and collaborating with the developer community. Hybrid London/remote, package to £130k.

API React Ruby TypeScript

C# Software Engineer / Team Lead

Lead a squad rebuilding an international payments platform within a global financial services company's Corporate Payments division, staying hands-on with C# architecture, development, delivery, and production operations. Based in Bracknell/Warfield with WFH options, salary up to £95k.

Release Engineering Lead Azure DevOps

New HybridUKLead

Leads release engineering for a SaaS product: owns packaging, releases and customer-facing delivery, runs day-to-day releases, and modernises CI/CD, automation, governance and observability on Azure while coaching teams to raise release maturity. Core tech: Azure, Azure DevOps, GitHub, Infrastructure as Code, GitOps.

Automation Azure Azure DevOps CI/CD Cloud +8 skills

Client Server Limited

Full Stack Engineer / Technical Lead B2B Saas

Technical lead role at a B2B SaaS provider of serverless real-time infrastructure that processes billions of messages daily. You'd own technical strategy and architecture for developer ecosystems, define API/SDK design standards, lead cross-team initiatives, and mentor engineers. Core stack: Ruby, TypeScript, React; mostly remote with monthly meetups at a North London office.

AI API Automation Design Patterns iOS +8 skills

Lead C# & .NET Core Backend Engineer (Hands-on Leader)

A hands-on lead backend engineer role in Newcastle upon Tyne: you own C#/.NET Core backend systems, architect APIs and microservices, and mentor a growing team while guiding technical decisions and roadmaps. Onsite position with competitive package and bonus potential.

API C++ C# .NET Java +2 skills

Client Server Limited

Lead Python Developer & Team Lead - FinTech, Hybrid London

Lead Python Developer & Team Lead in London (hybrid) heading a small team on a core banking platform: delivering features, refactoring, and blending architecture/design with people management and mentoring. Core stack: Python, FastAPI, cloud services, and SDLC; a STEM degree (2.1+) is required.

API Cloud FastAPI Python SDLC

Client Server Limited

Senior Front End React Engineer — Lead, WFH + Equity

A senior/lead React engineer will own the frontend of a payments/events platform in London — leading front end architecture, collaborating with product and design, and integrating APIs and real-time data with backend engineers. Hybrid: 3-4 days in office initially, with travel abroad.

Release Engineering Lead Azure DevOps

Release Engineering Lead at a global InsurTech business, owning release management and DevOps for complex SaaS systems built on Azure DevOps. Hybrid role (Reigate / Bracknell with WFH flexibility), salary up to £130,000.

Azure Azure DevOps DevOps SaaS

Release Engineering Lead Azure DevOps

Release Engineering Lead at a global InsurTech business, owning release engineering/management for complex SaaS systems using Azure DevOps. The role combines a DevOps background with strong release management leadership; based in Reigate with WFH/flexible working, salary up to £130k.

Azure Azure DevOps DevOps SaaS

Release Engineering Lead Azure DevOps

Release Engineering Lead at a global InsurTech business: you own day-to-day releases for an assigned SaaS product stack while modernising CI/CD pipelines, release automation and governance across the estate. Hands-on role blending Azure DevOps, GitHub, IaC and GitOps with coaching engineering teams; hybrid (3 days WFH), up to £130k plus bonus.

Automation Azure Azure DevOps CI/CD Cloud +7 skills

Release Engineering Lead Azure DevOps

Lead release engineering at a global InsurTech SaaS business, owning how software is packaged, released and presented to customers. Day-to-day combines DevOps practices with strong release management, using Azure DevOps. Based in Reigate with WFH/flexible working; salary up to £130k.

Azure Azure DevOps DevOps SaaS

Release Engineering Lead Azure DevOps

Release Engineering Lead at a global InsurTech business, owning release engineering and release management for complex SaaS systems using Azure DevOps. Requires a DevOps background and strong SaaS release management experience; based in Reigate or WFH with a salary up to £130k and flexible working.

Azure Azure DevOps DevOps SaaS

Client Server Limited

Lead Backend Engineer: Architect APIs & Microservices

Lead Backend Engineer at Client Server Limited in Newcastle upon Tyne, designing and implementing APIs and microservices, managing secure server environments, and providing architectural leadership while liaising with clients. Core stack: C#, .NET, Python, TypeScript, and REST APIs in a consultancy setting.

API C# .NET Microservices Python +2 skills

Lead Full Stack Engineer TypeScript Python API

Lead engineer driving data and technology strategy across a private equity portfolio: running data diligence, maturing portfolio companies' data capabilities and delivering data projects that support value creation. Core tech is TypeScript and Python for API development, with cloud (AWS, Azure, GCP) and AI/agentic programming.

Agentic AI AI Analytics API Api Design +7 skills

Python Developer / Team Lead - FinTech

Hands-on Team Lead for a core banking platform at a well-funded FinTech in London: split roughly 50/50 between hands-on Python/FastAPI architecture, refactoring and feature delivery, and leading/mentoring a small team. Stack is Python with FastAPI APIs, cloud (GCP preferred), and CI/CD.

API AWS Azure CI/CD Cloud +7 skills

React Developer Senior / Lead

Hands-on Lead React Developer owning the frontend of a core product at a scale-up: leading front-end architecture, integrating APIs and real-time data, setting tooling and build pipelines, and mentoring junior developers. Core stack: React, JavaScript/TypeScript, Redux/Context API. London-based with hybrid/remote flexibility; salary up to 90k plus potential equity.

API JavaScript React Redux TypeScript

Client Server Limited

Senior React Architect – Lead Frontend for Scalable FinTech

HireHi is hiring a Lead Front End Engineer in London to architect and build React front-ends for its financial operating system used in live events. The role stays hands-on, covering performance, accessibility, API/payment and real-time integrations, and front-end tooling decisions.

Client Server Limited

Lead Data Engineer: GCP, BigQuery & DBT | Hybrid Kraków

Senior lead data engineer role on a hybrid basis in Kraków: you lead a squad delivering a data platform on GCP (BigQuery, DBT) with batch and real-time Kafka workloads, blending technical leadership with people management while embedding data contracts and observability.

BigQuery dbt GCP Kafka Observability