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97 jobs Posted Sort

Client Server Limited

Remote Backend Engineer (Go/Node) - Real-Time Pub/Sub, Equity

NewBe an early applicant HybridUK

Backend engineer building and optimizing a real-time pub/sub messaging platform using Go and Node.js — designing scalable distributed systems, tuning performance, and owning critical components in an AI-driven environment. Remote with occasional meetups at the North London office; equity included.

AI Distributed Systems Node.js

Client Server Limited

Backend Developer Golang Node Pub / Sub

NewBe an early applicant UK

Backend engineer working on the core of a real-time messaging platform, building scalable distributed systems for low-latency Pub/Sub messaging, state sync and AI communication infrastructure in Go or Node.js. Mostly remote with monthly meetups at a North London office; salary up to £120k plus equity.

AI Cloud Distributed Systems Event Driven Architecture Kafka +4 skills

Client Server Limited

Backend Software Engineer Python LLM - Finance

NewBe an early applicant UK

Backend engineer at a finance technology consultancy serving global investment banks, designing autonomous AI systems: multi-modal LLM integration, agentic workflows with RAG and prompt engineering, model optimisation, and scalable MLOps pipelines. Core stack is Python with API development and cloud-native AI deployment.

Agentic AI Agile AI API Cloud +14 skills

Full Stack Engineer C# TypeScript - AI Start-up

NewBe an early applicant UK

Full stack engineer at an AI start-up building scalable SaaS products with C#, TypeScript, and Azure, using AI coding tools (Cursor, Claude) to ship MVPs fast. Day to day you own features end to end — design, CI/CD, testing, production — and work with the CTO to shape the product backlog.

Agentic AI AI Azure CI/CD Cloud +4 skills

Java Developer AI Claude - FinTech

NewBe an early applicant UK

Senior, hands-on Java backend developer role at a scaling FinTech in Newcastle (onsite), working on a new client engagement to modernise a sophisticated C++ trading system into a scalable platform, with an AI/Claude angle. Salary up to £120,000.

AI C++ Fintech Java

Client Server Limited

Full Stack Engineer (C# & TS) — AI SaaS, Hybrid WFH

NewBe an early applicant HybridUK

Full Stack Engineer building SaaS products at a scaling AI startup in London, working across C# and TypeScript on Azure and leveraging AI tooling. Hybrid role with two days a week in the office; salary is £100k–£120k per year plus pension.

AI Azure C# SaaS TypeScript

100K – 120K £

Client Server Limited

Full Stack Engineer C# TypeScript - AI Start-up

NewBe an early applicant RemoteUK

Full stack engineer at a bank-funded AI start-up incubator in London, building SaaS products from rapid, design-led MVPs using C#, TypeScript and Azure, while directing AI coding tools (Cursor, Claude Code) and owning CI/CD, testing and deployments. Hybrid: in the London office Wed/Thu, WFH otherwise.

Agentic AI AI Azure CI/CD Claude Code +5 skills

100K – 120K £

Client Server Limited

Python Software Engineer Conversational Ai

NewBe an early applicant RemoteUKFull-time

Hands-on backend Python engineer building production conversational/agentic AI systems — working with LLMs, third-party AI integrations, backend services and AWS/IaC infrastructure, while helping modernise the platform architecture. Remote-first UK role with flexible hours and salary to £90k.

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

Client Server Limited

Software Engineer Python Django Sql - Fintech

NewBe an early applicant HybridUKFull-time

Business-facing software engineer building internal platforms and applications with Python, Django, and SQL at a scaling London FinTech whose core product is a private equities / alternative investment management platform. Works across multiple teams and stakeholders, London-based, salary to £80k plus bonus.

Agentic AI AI API Django Fintech +2 skills

Client Server Limited

Backend Software Engineer Python Llm

NewBe an early applicant RemoteUKFull-time

Senior hands-on backend engineer at a scaling AI software provider, building production-grade conversational/agentic AI systems with Python, LLMs and third-party AI integrations, plus the supporting backend services and infrastructure (AWS, TypeScript, Node.js, IaC). Fully remote UK role with a team meetup every other month; salary to £90k.

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

Client Server Limited

Founding Software Engineer Python - Start-up

NewBe an early applicant RemoteUK

Founding full-stack engineer at a fast-growing AI start-up building compliance and operational-efficiency products for the NHS and other regulated industries. You own architecture through deployment, working mainly in Python and TypeScript with FastAPI, React, LLM/agentic AI, and CI/CD on Azure.

Agentic AI AI API Azure CI/CD +10 skills

100K – 115K £

Client Server Limited

Java Developer AI Claude - FinTech

NewBe an early applicant UKFull-time

Senior hands-on Java developer at a scaling FinTech in Central Newcastle (onsite, Mon–Fri), modernising a sophisticated C++ trading system into a scalable, real-time, low-latency Java trading platform with front-office teams, using AI-assisted tools like Claude. Salary to £120k plus bonus.

AI C++ Fintech Java

Python Developer - Problem Solver

NewBe an early applicant UK

On-site Python/backend software engineer role in Cambridge (up to £65k) at a cybersecurity company that uses AI to protect clients from advanced cyber threats. Day to day involves problem solving on complex systems, primarily using Python.

AI Cybersecurity Python

Backend Software Engineer TypeScript

NewBe an early applicant UK

Backend Software Engineer (TypeScript) joining one of the world's leading cyber security technology companies in Cambridge (with WFH options), developing next-generation software that protects organisations from AI-driven cyber threats. Salary up to £70,000.

AI Cybersecurity TypeScript

Full Stack Engineer C# TypeScript - AI Start-up

NewBe an early applicant UK

Full Stack Engineer / Developer (C# TypeScript Azure) London / WFH to £120k Are you a technologist with full stack development skills looking for an opportunity to make an impact at a scaling start-up? You could be…

AI Azure C# TypeScript

Python Developer - Cyber Security

NewBe an early applicant UK

Python Developer / Backend Software Engineer Cambridge to £65k Are you a technologist Python Developer who enjoys problem solving and working on complex systems? You could be progressing your career at the world's most…

AI Cybersecurity Python

Backend Software Engineer TypeScript

NewBe an early applicant UK

Backend Software Engineer / Developer (TypeScript) Cambridge / WFH to £70k Are you a backend focussed TypeScript Engineer? You could be progressing your career at one of the world's leading cyber security technology…

AI Cybersecurity TypeScript

Client Server Limited

Python Software Engineer - Technologist

Backend Python engineer in the R&D team of a cybersecurity technology firm in Cambridge, building a greenfield product to defend against AI-based attacks. Day to day is backend Python development with some Rust/TypeScript/C++ and cloud platforms, hybrid from the Cambridge office twice a week.

AI AWS Azure C++ Cybersecurity +5 skills

Client Server Limited

Founding Software Engineer (Python) – Equity & Impact

Founding engineer at an early-stage AI start-up, owning the design and build of scalable, cloud-native apps end-to-end (backend and frontend) in Python and TypeScript, with CI/CD and Azure deployments. Works alongside the founding team to set engineering direction, splitting time between London and Cambridge.

AI Azure CI/CD Cloud Cloud Native +2 skills

Client Server Limited

Senior Software Engineer Python TypeScript AI

New RemoteUKSenior

Senior Software Engineer at a global games software house, taking AI prototypes into reliable production systems used by ~700,000 live users. Builds LLM-powered applications and agentic workflows across Python and TypeScript backends on AWS, working hybrid from Central Manchester three days a week.

Agentic AI AI AWS CI/CD Cloud +7 skills