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301 jobs

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301 jobs Posted Sort

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

react developer for live events

Lead/ senior React developer for a startup building a financial operating system for live events (payments, queue reduction). Day to day: own front-end architecture in React/TypeScript, integrate payment APIs and real-time data, mentor juniors. London office 3-4 days/week for first 6 months, then flexible.

API JavaScript React Redux TypeScript

Backend Software Engineer Python R&D

Join an R&D team building a greenfield backend product that counters AI-based security threats. The role is primarily Python (with Rust/exposure to other languages), spanning rapid prototyping, architecture, and deploying/scaling on cloud platforms (AWS/Azure/GCP). London-based with WFH.

AI AWS Azure Cloud C++ +5 skills

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

Client Server Limited

Lead Data Engineer GCP BigQuery DBT

RemoteEuropeLead

Lead a squad of data engineers at a global FinTech/CFD trading company in Kraków, delivering batch and real-time Kafka data pipelines on GCP. Core stack: BigQuery, dbt, SQL, Python, with Medallion architecture, data contracts, observability and people management.

Analytics BigQuery Data Governance Data Pipelines Data Quality +9 skills

up to 35K PLN / mo

Technical Product Manager - Platform Engineering

A hands-on Technical Product Manager with a software engineering background joins a global Platform Team at a major FinTech, driving a SaaS transformation across a diverse portfolio of products and services. Based Reigate or WFH, salary up to £100k.

Backend Software Engineer C++ Python - Trading

A backend engineer builds and optimizes data-driven systems in C++ and Python that power systematic trading strategies, collaborating with senior engineers and quantitative researchers in a Linux environment at a tech-led trading firm.

C++ Linux Python

Lead C# Developer .Net - FinTech

Hands-on Lead C# Developer role building and leading development of complex, scalable C#/.NET desktop applications for a global fintech. Based in Reigate, Surrey with hybrid working (3 days a week from home), paying up to £100k plus a ~20% bonus.

C# .NET Fintech

Senior Software Engineer C# Python AI

Salary: £40,000 - 70,000 per year Requirements Strong backend software engineering skills with C# and/or Python Strong knowledge of Computer Science fundamentals, including OOP, multithreading, design patterns, and…

Agile AI Angular AWS Azure +14 skills

Client Server Limited

Backend Software Engineer C++ Python - Trading

UKFull-timeLead

Hands-on backend engineer at a systematic trading firm in London, designing, implementing and optimising C++ and Python components that power proprietary, data-driven trading strategies, collaborating with experienced engineers and quantitative researchers. Office-based Monday-Friday near St James Park; salary up to £125k.

C++ Linux Python

90K – 125K £

Client Server Limited

Software Engineer Python GenAI LLM - Finance

HybridUKContract

Software Engineer Python GenAI LLM - Finance London, Greater London | £140k - £180k per year Software Engineer / Developer (Python GenAI LLM RAG) London 12 month FTC to £180k Are you a Senior Software Engineer with a…

Agentic AI API Claude Code Data Engineering Developer Experience +7 skills

Senior Java Developer – Spring Boot TDD

Salary: £40,000 - 70,000 per year Requirements: Strong backend software engineering skills and experience Strong Java and Spring Boot development experience Technical or team leadership experience, including mentoring…

Agentic AI AI AWS Cloud Design Patterns +9 skills

Client Server Limited

Python Cyber Security Software Engineer

Salary: £40,000 - 70,000 per year Requirements Advanced Python and backend software engineering experience Advanced problem-solving and critical-thinking skills Interest in learning and adopting new technologies…

AI AWS Azure Cloud C++ +6 skills

Python Software Engineer Agentic AI

Overview In this role you will design and deliver backend solutions and AI-enabled workflows that empower intelligent agents. You’ll work with a cross-functional team to implement robust APIs and prompt-driven systems…

Agentic AI Agile AI API AWS +9 skills

Python Software Engineer Cyber Security

Overview In this Python Software Engineer role, you will help build a Greenfield AI cybersecurity product within the R&D team. You’ll mainly develop backend services in Python while evaluating Rust and other…

AI AWS Azure C++ Cybersecurity +4 skills

Client Server Limited

Python Software Engineer Cyber Security

Python Software Engineer / Developer London / WFH to GBP80k Do you have strong backend Python software development experience? You could be progressing your career at the world's most advanced cybersecurity…

AI Cybersecurity Python

Client Server Limited

Python Software Engineer Conversational AI

RemoteUKFull-time

Python Software Engineer Conversational AI London, Greater London | £80k - £90k per year Python Software Engineer / Developer (Conversational AI) Remote UK to £90k Are you a backend focussed Python Software Engineer…

Agentic AI AI AWS Conversational AI Infrastructure as Code +4 skills

Backend Software Engineer C++ Python - Trading

Backend Software Engineer / Developer (C++ Python) London / WFH to £125k Are you a bright, ambitious technologist with strong C++ and Python skills combined with a good understanding of the trade lifecycle? You could…

Backend Software Engineer Python R&D

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

Founding Software Engineer Python - Start-up

Overview In this Founding Software Engineer role you will shape both technology and product in a fast-growing AI startup. You’ll own the design and development of cloud-native applications, spanning backend, frontend,…

Agentic AI AI API Azure CI/CD +10 skills