Tech jobs

Senior Backend Engineer: Real-Time Data Platform

Senior backend engineer at Grid Dynamics building a cloud-native real-time and end-of-day market data platform for a commodities-firm client in London. Day to day: plan the migration, deploy new systems, analyse traffic, and expand data feeds and APIs while keeping client apps working unchanged.

API Cloud Cloud Native

Holt Executive Ltd

Software Engineer

Atlassian Bitbucket C Can Bus Confluence +6 skills

Software Engineer building real-time C software for full flight simulators and fixed training devices that replicate aircraft flight decks — spanning control systems, GUIs, integration, testing, and full product lifecycle. Desirable extras include C++/C#, web tech, avionics protocols (ARINC, AFDX, CAN).

Oliver James Group

Software Engineer

New HybridUK

Agile AI Analytics API AWS +31 skills

Full-stack Software Engineer at a SaaS business serving social housing, local government and healthcare, building a multi-tenant AI platform with a ColdFusion/CFML backend, MySQL and a React/TypeScript frontend. Involves REST APIs, ML/LLM integrations, CI/CD and AWS; ColdFusion experience is not required.

Experis (Austria)

Kotlin Backend Engineer - Hybrid, Contract to 2027

New HybridUKContract

Agile API Bitbucket CI/CD Confluence +5 skills

Contract (to 2027) Kotlin developer role in Sheffield, hybrid with 2-3 days onsite per week, up to £450.80/day inside IR35 via Experis. Day to day: building backend features and APIs in Kotlin/Java within a microservices architecture, plus some frontend and PoC work, using GitHub/Bitbucket, Jira, Confluence and agile CI/CD.

up to 451 £ / day

Additional Resources Ltd

Backend Engineer (C++/Java) - Linux, SC Cleared, Relocation

Designs, develops and maintains high-performance backend solutions in C++ and Java on Linux, working with customers and internal teams on architecture, APIs and scalable systems. Requires ~5 years' commercial experience and SC security clearance eligibility, based in Cheltenham with relocation supported.

API C++ Java Linux

Experis UK

DV Cleared Full Stack Developer for Public Sector

DV-cleared Full Stack Developer building web applications for Defence & National Security projects in the UK public sector. Day to day involves developing responsive front-end UIs, secure APIs, and back-end services, collaborating with cross-functional teams and contributing across the full software development lifecycle.

Aumni

Software Engineer III - Java E-Trading Developer

Agile AI Automation CI/CD Cucumber +13 skills

Java e-trading developer on J.P. Morgan's Macro e-trading platform in London, building highly available, low-latency components that stream real-time prices and execute client trades across FX, Rates, Commodities, Credit and ETFs. Core stack: Java, FIX protocol, low-latency middleware, Linux, and CI/CD tooling.

WeDo

Senior DevOps Engineer

New UKFull-timeSenior

AI Authentication Automation AWS Azure +26 skills

Senior DevOps engineer role with a security-first (DevSecOps) focus: hardening AWS and Azure environments, embedding security into CI/CD and IaC, strengthening IAM, improving observability, and driving SOC 2 compliance by Q1 2027. Mostly remote with 1 day per month in Shoreditch, London.

DevOps Engineer - C#

Agile AI Analytics Azure Azure Application Insights +26 skills

Senior DevOps engineer at consultancy Grid Dynamics, embedded with a London asset-management client to standardise build and deployment pipelines for a C#/.NET and Python estate. Day to day: reusable GitHub Actions workflows, containerisation, Kubernetes/VM deploy patterns, quality and security gates, Terraform/Bicep IaC, and migrating off Azure DevOps.

Teton.ai ApS

Backend Engineer: Real-Time Health Data & APIs

API Data Ingestion MQTT Observability

Backend engineer at Teton.ai building and scaling core infrastructure that ingests real-time data from thousands of edge devices deployed in care facilities. Day-to-day work spans distributed data ingestion, real-time event pipelines, APIs and backend services, databases and storage, MQTT/edge communication, and observability.

Software Engineer,Risk & Data Technology - Python or Java or C#

AI Analytics API Athena AWS +21 skills

Senior backend engineer building a greenfield cloud-native market data platform for a global commodities trading firm: event-driven feed ingestion from market data providers, query APIs on ClickHouse/Iceberg, an intercepting proxy for API compatibility, and end-to-end observability, using Python, Java, or C# on AWS.

iwoca

Backend Engineer - Repeats

New HybridUK

AI Analytics AWS Claude Code Data Science +13 skills

Backend engineer on iwoca's Repeats team, owning the Python services that decide which repeat small-business borrowers get a loan, at what price and amount. You'll ship features end-to-end behind split tests using PostgreSQL and Django, gradually picking up React/TypeScript front-end work. Hybrid role based in London.

60K – 80K £

Python Quantitative Developer – Cross Asset XVA & Capital Analytics

AI Analytics Cloud C++ C# +8 skills

Opportunity We are looking for an experienced C++/Python Quantitative Developer to join a high-impact quantitative analytics team focused on Cross Asset XVA and Capital Analytics . This is a senior technical role…

Ex-Mil Recruitment Limited

Python Software Engineer vacancy in Hybrid (Midlands & Remote) (243lw)

Agile Ansible Bash DevOps Docker +6 skills

Software engineer building software solutions for Defence and secure technology projects in a hybrid Midlands/remote role. Day to day: coding in Python on Linux, Agile sprint work, DevOps tooling, documentation, and third-line customer support. Requires 3+ years' commercial experience and SC clearance eligibility.

Allstate Northern Ireland Limited

Senior Java Engineer: Cloud, APIs & Kafka (Hybrid)

Ex-Mil Recruitment Limited

Senior engineer at Allstate Northern Ireland designing, building, and operating billing-related software in a hybrid Belfast role. Day-to-day work centers on Java, cloud platforms, APIs, and Kafka, alongside architecture, test-driven development, mentoring juniors, and improving CI/CD.

CI/CD Cloud TDD

Python Software Engineer - Defence Tech (Hybrid/Remote)

New HybridUK

Hybrid (West Midlands / remote) Python engineer role in the defence and secure technology sector, working in an established tech team to deliver software across multiple projects. Core stack is Python, Linux, and Bash; 3+ years' experience required, with SC clearance preferred.

Bash Linux Python

Senior Low-Latency Java Engineer: JVM Tuning & Performance

Global Payment Holding Company

Senior Java engineer optimizing low-latency FX e-trading: profiling and tuning the JVM and building high-throughput, low-GC Java systems for order execution and market data delivery, working alongside quants and traders with Ambrosia and telemetry stacks. London-based with a competitive salary and flexible schedule.

Java JVM

Senior Java Engineer for Global Payments (Linux & Oracle)

Senior Java engineer on the Worldwide Payments Gateway team at a global payment holding company in Manchester, writing code and providing technical leadership to deliver payments software built on Java, Oracle, and Linux.

Java Linux Oracle

Senior Low-Latency Java Engineer