Backend Developer jobs in London hiring now at vetted startups and product companies on Alion, updated daily. Average salary around $190,840/year. Compare remote, hybrid and on-site positions with relocation and visa sponsorship. Browse and apply today.
flatiron.com · HQ: New York, United States · CRO & CDMO Services · Medical AI · Est. 2012 · Trust A · Hiring 23, 5 new
HQ: New York, United States · CRO & CDMO Services · Medical AI · Est. 2012 · Trust A · Hiring 23, 5 new
Flatiron Health is a New York company founded in 2012 that builds real-world evidence datasets from oncology electronic health records. It combines machine extraction with clinical abstraction to turn unstructured notes into research-grade data used in regulatory submissions and drug development. Acquired by Roche in 2018, it continues to operate independently and also sells software to cancer practices.
capgemini.com · HQ: Paris, France · Management Consulting · Engineering Services · Systems Integrators · IT Consulting & Digital Transformation · 5000+ employees · Est. 1967 · IT services · Trust B · Hiring 4289, 293 new
HQ: Paris, France · Management Consulting · Engineering Services · Systems Integrators · IT Consulting & Digital Transformation · 5000+ employees · Est. 1967 · IT services · Trust B · Hiring 4289, 293 new
Capgemini is a French information technology services and consulting group founded in Grenoble in 1967 by Serge Kampf, and one of the largest IT service providers in the world. It designs, builds and runs systems for large enterprises and governments across some fifty countries, with a delivery workforce concentrated in India and a European client base heavier than most of its competitors. The group is organised into Capgemini Invent for strategy and design, Capgemini Engineering for research and development services acquired with Altran, and Sogeti for local technology services, and it has reoriented its portfolio around cloud migration, data platforms and generative AI.
uipath.com · HQ: New York, United States · Document AI · AI Agents · Workflow & Process Automation (RPA, BPM) · 51-200 employees · Est. 2005 · NYSE: PATH · Trust B · Hiring 96, 13 new
HQ: New York, United States · Document AI · AI Agents · Workflow & Process Automation (RPA, BPM) · 51-200 employees · Est. 2005 · NYSE: PATH · Trust B · Hiring 96, 13 new
UiPath is a Romanian-founded American company started in Bucharest in 2005 that became the leading vendor of robotic process automation, software robots that operate other applications through their user interfaces to automate work no integration existed for. Having grown enormously on that premise, it has spent recent years absorbing the fact that language models can do parts of the same job differently, and has rebuilt its platform around agentic automation that combines deterministic robots with model-driven agents. Headquartered in New York and listed on the New York Stock Exchange, it retains one of the largest installed automation estates in the enterprise market.
caisgroup.com · HQ: New York, United States · Financial Software & Embedded Finance · 51-200 employees · Est. 2009 · Trust A · Hiring 12
HQ: New York, United States · Financial Software & Embedded Finance · 51-200 employees · Est. 2009 · Trust A · Hiring 12
CAIS is a New York financial technology company founded in 2009 that connects independent wealth advisers to alternative investments. Its platform handles fund access, education and operational workflow for private equity, credit and hedge fund allocations. The company serves thousands of advisory firms in the United States.
cusp.ai · HQ: Cambridge, United Kingdom · Manufacturing · AI for Science · Artificial Intelligence · 501-1000 employees · Est. 2024 · Startup · Trust A · Hiring 22
HQ: Cambridge, United Kingdom · Manufacturing · AI for Science · Artificial Intelligence · 501-1000 employees · Est. 2024 · Startup · Trust A · Hiring 22
CuspAI builds generative models that search for new materials with target properties. Its first applications focus on carbon capture materials. The company was founded by researchers from DeepMind and academia.
pleo.io · HQ: Copenhagen, Denmark · Cards & Card Issuing · Procurement & Spend Management · 501-1000 employees · Est. 2015 · Trust A · Hiring 35, 6 new
HQ: Copenhagen, Denmark · Cards & Card Issuing · Procurement & Spend Management · 501-1000 employees · Est. 2015 · Trust A · Hiring 35, 6 new
Pleo is a major European FinTech unicorn and smart business spend management enterprise headquartered in Copenhagen, Denmark. Founded in 2015 by Fintech entrepreneurs Jeppe Rindom (CEO) and Niccolo Perra, the company operates on a B2B SaaS subscription model combined with interchange revenue from corporate card transactions.
faculty.ai · HQ: London, United Kingdom · Management Consulting · Custom Software Development · Decision Intelligence · AI Consulting & Integration · 201-500 employees · Est. 2014 · Startup · Trust A · Hiring 66, 6 new
HQ: London, United Kingdom · Management Consulting · Custom Software Development · Decision Intelligence · AI Consulting & Integration · 201-500 employees · Est. 2014 · Startup · Trust A · Hiring 66, 6 new
Faculty is an artificial intelligence technology company headquartered in London, United Kingdom, and founded in 2014. The firm provides services including AI strategy consulting, custom software development, and specialized talent programs to help organizations implement decision intelligence. It operates as a subsidiary of Accenture and serves a global client base across sectors such as defense, healthcare, and energy, focusing on the safe and high-performance deployment of AI solutions.
kernel.ai · HQ: London, United Kingdom · B2B Company & Contact Data · Data Quality & Observability · Startup · Hiring 15, 1 new
HQ: London, United Kingdom · B2B Company & Contact Data · Data Quality & Observability · Startup · Hiring 15, 1 new
Kernel builds a business identity layer that gives AI agents and sales and operations teams trustworthy company data. It cleans duplicated records, fills in missing parent companies and corrects outdated addresses in CRMs, ERPs and third-party datasets. The company is headquartered in London, United Kingdom.
itv.com · HQ: London, United Kingdom · Streaming & OTT Platforms · TV Production · Broadcasting · 501-1000 employees · Est. 1955 · Hiring 30, 3 new
HQ: London, United Kingdom · Streaming & OTT Platforms · TV Production · Broadcasting · 501-1000 employees · Est. 1955 · Hiring 30, 3 new
Headquartered in London, United Kingdom, ITV is a public media and television production conglomerate operating as the UK's largest commercial broadcaster. The company functions through two core divisions: Media & Entertainment, which operates its portfolio of free-to-air linear channels and the ITVX streaming platform, and ITV Studios, an international content creator and distributor.
broadridge.com · HQ: Lake Success, United States · Custody & Fund Administration · Financial Software & Embedded Finance · 5000+ employees · Est. 2007 · Trust B · Hiring 244, 22 new
HQ: Lake Success, United States · Custody & Fund Administration · Financial Software & Embedded Finance · 5000+ employees · Est. 2007 · Trust B · Hiring 244, 22 new
Broadridge is an American financial technology company spun out of ADP in 2007 that operates much of the invisible infrastructure behind securities markets. It processes shareholder communications and proxy voting for the large majority of United States public company shares, runs post-trade processing and clearance systems for broker-dealers, and sells wealth management, capital markets and communications platforms to banks and asset managers. Headquartered in New York and listed on the New York Stock Exchange, its revenue is almost entirely recurring because clients cannot easily move the record-keeping systems it operates.
Nationwide Building Society is a UK mutual financial institution headquartered in Swindon, England, providing mortgages, current accounts, savings, credit cards and business banking to its members. Owned by its members rather than shareholders, it is the largest building society in the world, operates a national branch network and acquired Virgin Money UK in 2024. Its openings span software, data and integration engineering, analytics, compliance, risk and audit roles, mortgage technical delivery, customer support and branch management, mainly in Swindon, London, Northampton and Glasgow.
seedtag.com · HQ: Madrid, Spain · Artificial Intelligence · Advertising · Est. 2014 · Hiring 15, 3 new
HQ: Madrid, Spain · Artificial Intelligence · Advertising · Est. 2014 · Hiring 15, 3 new
Seedtag is a Madrid advertising technology company founded in 2014 by two former Google employees. Its contextual advertising engine reads the meaning of articles and images to place ads without using personal identifiers. The company operates across Europe and the Americas and is a reference in cookieless advertising.
≈ $59k – $121k per year (Estimated) · Senior · Madrid · Barcelona · Hamburg · London · Milan · Remote (Germany, France, United Kingdom, Belgium, Italy) · Full-Time · Senior
arqfinance.com · HQ: Mexico City, Mexico · Stablecoins · Currency Exchange & FX Payments · Digital Banks & Neobanks · Est. 2021 · Startup · Trust B · Hiring 28, 4 new
HQ: Mexico City, Mexico · Stablecoins · Currency Exchange & FX Payments · Digital Banks & Neobanks · Est. 2021 · Startup · Trust B · Hiring 28, 4 new
ARQ, formerly known as DolarApp, is a financial technology company that offers digital dollar and euro accounts, international payment cards, and cross-border transfer solutions. Built on stablecoin infrastructure, the platform allows users across Latin America to seamlessly convert currencies, send international payments, and store savings in digital assets. Headquartered in Mexico City, Mexico, the firm operates across the Americas to connect consumers and businesses with global financial markets.
flowengineering.com · HQ: San Francisco, United States · CAD, PLM & BIM Software · Manufacturing & Industrial Software · 501-1000 employees · Startup · Trust B · Hiring 35, 3 new
HQ: San Francisco, United States · CAD, PLM & BIM Software · Manufacturing & Industrial Software · 501-1000 employees · Startup · Trust B · Hiring 35, 3 new
Flow Engineering develops Flow, a requirements management and verification platform for hardware engineering teams that links requirements, CAD, simulation, code and test data in one living systems graph, with AI agents that propagate changes and run impact analysis. Its customers are aerospace, defense, automotive and hardware companies, and it has announced a three-year strategic partnership with Rivian and Volkswagen Group Technologies. Based in San Francisco with staff in London, Los Angeles, Austin and Washington, it hires software and infrastructure engineers, forward deployed engineers, solutions architects, account executives, deployment strategists and growth marketers.
depop.com · HQ: London, United Kingdom · Marketplaces · Secondhand · 501-1000 employees · Est. 2011 · Trust B · Hiring 22, 2 new
HQ: London, United Kingdom · Marketplaces · Secondhand · 501-1000 employees · Est. 2011 · Trust B · Hiring 22, 2 new
Depop is a London company founded in 2011 that runs a social marketplace for second hand fashion. Its app blends resale listings with a feed and follower model that suits younger sellers building personal brands. The company was acquired by Etsy and continues to operate from London with millions of active users.
palantir.com · HQ: Denver, United States · Defense AI · Data Integration & ETL Tools · Decision Intelligence · 1001-5000 employees · Est. 2003 · NASDAQ: PLTR · Trust C · Hiring 233, 5 new
HQ: Denver, United States · Defense AI · Data Integration & ETL Tools · Decision Intelligence · 1001-5000 employees · Est. 2003 · NASDAQ: PLTR · Trust C · Hiring 233, 5 new
Palantir Technologies is an American software company founded in 2003 that builds platforms for integrating, analysing and acting on large and fragmented datasets. Its Gotham platform serves defence, intelligence and law enforcement customers, Foundry brings the same data-operating model to commercial industries such as manufacturing, healthcare and energy, and the Artificial Intelligence Platform layers large language models over both. Headquartered in Denver, Colorado and listed on the New York Stock Exchange since 2020, the company is known for deploying forward engineers directly inside customer organisations.
createfuture.com · HQ: Edinburgh, United Kingdom · AI Consulting & Integration · IT Consulting & Digital Transformation · Custom Software Development · 501-1000 employees · Est. 2010 · Trust A · Hiring 43, 8 new
HQ: Edinburgh, United Kingdom · AI Consulting & Integration · IT Consulting & Digital Transformation · Custom Software Development · 501-1000 employees · Est. 2010 · Trust A · Hiring 43, 8 new
CreateFuture is an AI transformation and software engineering partner that builds digital products, platforms, and AI-native solutions for enterprise clients. Headquartered in Edinburgh, Scotland, the company assists organizations across sectors like fintech, energy, and government in modernizing legacy technology and scaling intelligent workflows. Its services span business strategy, cloud infrastructure, customer experience design, and data engineering to drive digital growth.
cityscience.com · HQ: Exeter, United Kingdom · Engineering Services · 51-200 employees · Est. 2015 · Hiring 2
HQ: Exeter, United Kingdom · Engineering Services · 51-200 employees · Est. 2015 · Hiring 2
Carbon first engineering We help clients who are committed to decarbonisation achieve meaningful and quantifiable carbon reductions quickly and efficiently Contact us now City Science is the first engineering company dedicated to decarbonisation.
red-badger.com · HQ: London, United Kingdom · UI/UX Design · IT Consulting & Digital Transformation · Custom Software Development · 201-500 employees · Est. 2010 · Trust A · Hiring 28, 2 new
HQ: London, United Kingdom · UI/UX Design · IT Consulting & Digital Transformation · Custom Software Development · 201-500 employees · Est. 2010 · Trust A · Hiring 28, 2 new
Red Badger is a digital product consultancy that designs and builds software products, web platforms and mobile apps for large enterprises, offering product strategy, user experience design, software engineering and platform delivery. Its clients include banks, retailers and media groups, and it runs delivery teams in the United Kingdom, South Africa and New Zealand. The company is headquartered in London, England, United Kingdom.
