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.
intercom.com • HQ: San Francisco, United States • AI Agents • Conversational AI • Customer Support & Help Desk Software • Est. 2011 • Trust B • Hiring 116, 4 new
HQ: San Francisco, United States • AI Agents • Conversational AI • Customer Support & Help Desk Software • Est. 2011 • Trust B • Hiring 116, 4 new
Intercom is a customer service software company founded in Dublin in 2011 that began as a messenger embedded in web products and has rebuilt itself around artificial intelligence support agents. Its Fin agent resolves customer questions autonomously from a company's own help content and is priced per resolution rather than per seat, which is an unusual model for the category, and it sits alongside a help desk, knowledge base and proactive messaging tools for human teams. Headquartered in San Francisco with a large engineering presence in Dublin, the company is privately held and competes with Zendesk, Salesforce and the newer artificial intelligence support vendors.
wiz.io • HQ: New York, United States • Security Operations • Cloud Security • Cybersecurity AI • Information Security • 1001-5000 employees • Est. 2020 • Trust B • Hiring 110, 14 new
HQ: New York, United States • Security Operations • Cloud Security • Cybersecurity AI • Information Security • 1001-5000 employees • Est. 2020 • Trust B • Hiring 110, 14 new
Wiz is a cloud security company founded in 2020 by four Israeli engineers who had previously built and sold Adallom to Microsoft, and it grew faster to a hundred million dollars of recurring revenue than any software company before it. Its platform connects to a customer's cloud accounts without agents, builds a graph of every resource, identity and permission, and surfaces the small number of attack paths that actually combine into a serious risk rather than producing thousands of unranked alerts. Headquartered in New York with research in Tel Aviv, the company agreed in 2025 to be acquired by Google for around thirty-two billion dollars, the largest deal in Google's history.
nominal.io • HQ: Los Angeles, United States • Manufacturing & Industrial Software • 501-1000 employees • Est. 2023 • Startup • Trust B • Hiring 38
HQ: Los Angeles, United States • Manufacturing & Industrial Software • 501-1000 employees • Est. 2023 • Startup • Trust B • Hiring 38
Nominal builds a connected test and operations platform for hardware engineering teams, ingesting test and telemetry data, analyzing performance and automating test execution. It serves aerospace, defense and robotics teams, from spacecraft to autonomous vehicles, and hires forward deployed, product and mission operations engineers. The company is headquartered in Los Angeles, California, United States.
indicium.com • New York • London • Lisbon • Houston • AI Consulting & Integration • Data Engineering & Migration Services • Analytics & BI Consulting • 201-500 employees • Trust C • Hiring 30, 3 new
New York • London • Lisbon • Houston • AI Consulting & Integration • Data Engineering & Migration Services • Analytics & BI Consulting • 201-500 employees • Trust C • Hiring 30, 3 new
Indicium is a global data and AI consultancy that takes analytics and artificial intelligence projects into production for large enterprises. It serves clients in financial services, energy and utilities, healthcare and life sciences, retail and manufacturing, and hires data engineers, consultants and account directors in New York, London and Lisbon. The company is based in the United States.
atominvest.co • HQ: London, United Kingdom • Financial Software & Embedded Finance • 11-50 employees • Est. 2020 • Trust C • Hiring 11
HQ: London, United Kingdom • Financial Software & Embedded Finance • 11-50 employees • Est. 2020 • Trust C • Hiring 11
The operating system for modern private markets firms. Streamline investor and portfolio workflows with one modular platform with best-in-class time to value.
sphere.com.ai • HQ: San Francisco, United States • Accounting & Tax Software • RegTech, AML & Compliance • Likely startup • Trust C • Hiring 13
HQ: San Francisco, United States • Accounting & Tax Software • RegTech, AML & Compliance • Likely startup • Trust C • Hiring 13
Sphere is a software company building infrastructure for trade compliance, helping businesses handle the rules of more than 190 sovereign jurisdictions. Its platform treats trade rules as a complex, constantly changing system, and the company hires account executives, growth leads, tax support specialists, trainers and content creators. The company is headquartered in San Francisco, California, United States.
mavensecurities.com • HQ: London, United Kingdom • Hedge Funds & Alternative Investments • Online Brokerage & Trading Platforms • Trust C • Hiring 33
HQ: London, United Kingdom • Hedge Funds & Alternative Investments • Online Brokerage & Trading Platforms • Trust C • Hiring 33
Maven Securities is a proprietary trading firm deploying its own capital across discretionary, systematic and market-making strategies in global listed derivatives. It hires traders, compliance analysts and technology staff and runs spring week programs, with offices in London, Chicago, Hong Kong and Amsterdam. The firm is headquartered in London, United Kingdom.
watershed.com • HQ: San Francisco, United States • ESG & Carbon Accounting Software • 201-500 employees • Est. 2019 • Startup • Trust B • Hiring 31, 3 new
HQ: San Francisco, United States • ESG & Carbon Accounting Software • 201-500 employees • Est. 2019 • Startup • Trust B • Hiring 31, 3 new
Watershed is a climate software company founded in 2019 that helps enterprises measure, report and reduce their carbon emissions. Its platform collects activity data across operations and supply chains, produces audit-ready greenhouse gas inventories for disclosure regimes such as CSRD and ISSB, and supports decarbonisation and supplier engagement programmes for large global brands. The company is headquartered in San Francisco, California, United States.
codurance.com • HQ: London, United Kingdom • Custom Software Development • IT Consulting & Digital Transformation • Est. 2013 • Hiring 5
HQ: London, United Kingdom • Custom Software Development • IT Consulting & Digital Transformation • Est. 2013 • Hiring 5
Codurance is a global software consultancy firm focused on helping businesses modernize their technical capabilities and build sustainable growth. With a dedication to Software Craftsmanship, Codurance emphasizes professionalism and technical excellence in software development. The company offers a range of services, including software modernization, product development, and cloud engineering, tailored to help clients solve complex challenges and achieve their business goals.
helloprima.com • HQ: Milan, Italy • InsurTech • Property & Casualty Insurance • Financial Services • 1001-5000 employees • Est. 2015 • Trust A • Hiring 54, 3 new
HQ: Milan, Italy • InsurTech • Property & Casualty Insurance • Financial Services • 1001-5000 employees • Est. 2015 • Trust A • Hiring 54, 3 new
Prima is a digital insurance company headquartered in Milan that sells motor and other insurance online, built on its own technology and data platforms since its founding in 2015. It became the largest online motor insurer in Italy with more than 5 million customers, expanded into Spain and the UK, raised 1.3 billion euros of resources in 2024 and joined the AXA Group in 2025. It hires software, data and machine learning engineers, data scientists, quantitative analysts, motor claims handlers, customer care staff and regional area managers in Milan, Madrid, London and Manchester.
rivian.com • HQ: Irvine, United States • Automotive Manufacturing • 1001-5000 employees • Est. 2009 • Trust A • Hiring 717, 44 new
HQ: Irvine, United States • Automotive Manufacturing • 1001-5000 employees • Est. 2009 • Trust A • Hiring 717, 44 new
Headquartered in Irvine, California, Rivian is an American electric vehicle manufacturer and automotive technology company. The enterprise designs and builds all-electric pickup trucks, sport utility vehicles, and commercial delivery vans tailored for both consumer adventure and commercial fleet operations. Through continuous innovation in battery technology and software-defined vehicle platforms, the business aims to accelerate the global transition to sustainable transportation.
kinship.io • HQ: Irvine, United States • HQ: London, United Kingdom • CAD, PLM & BIM Software • 11-50 employees • Likely startup • Trust B • Hiring 9
HQ: Irvine, United States • HQ: London, United Kingdom • CAD, PLM & BIM Software • 11-50 employees • Likely startup • Trust B • Hiring 9
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theodo.com • HQ: Paris, France • AI Consulting & Integration • Cloud Consulting & Migration • Mobile App Development Services • Custom Software Development • 51-200 employees • Est. 2009 • IT services • Trust B • Hiring 109, 2 new
HQ: Paris, France • AI Consulting & Integration • Cloud Consulting & Migration • Mobile App Development Services • Custom Software Development • 51-200 employees • Est. 2009 • IT services • Trust B • Hiring 109, 2 new
Theodo is a French technology group founded in 2009 that builds digital products for large organisations and has grown into a federation of specialist agencies across web, mobile, cloud, data and artificial intelligence. Its structure is deliberately unusual: rather than scaling one large firm it spins out small autonomous companies, each with its own leadership and specialism, sharing engineering practice and back office. Headquartered in Paris with offices in London, New York and Casablanca, it is known in the French market for strong engineering craft and for publishing its methods openly.
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meticulous.ai • HQ: London, United Kingdom • Software Testing & QA • 51-200 employees • Est. 2021 • Startup • Trust B • Hiring 6
HQ: London, United Kingdom • Software Testing & QA • 51-200 employees • Est. 2021 • Startup • Trust B • Hiring 6
Meticulous auto-generates and auto-maintains visual frontend browser tests, providing a level of coverage that is unattainable with manually written tests.
golunar.com • HQ: San Francisco, United States • Hospital Operations Software • 51-200 employees • Startup • Trust D • Hiring 14
HQ: San Francisco, United States • Hospital Operations Software • 51-200 employees • Startup • Trust D • Hiring 14
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wordsmith.org • HQ: Edinburgh, United Kingdom • AI Agents • Legal Software • Legal AI • 201-500 employees • Est. 1994 • Trust A • Hiring 15, 1 new
HQ: Edinburgh, United Kingdom • AI Agents • Legal Software • Legal AI • 201-500 employees • Est. 1994 • Trust A • Hiring 15, 1 new
Wordsmith is a legal technology company building a legal operating system for in-house teams, where requests from across the business come into one place, AI agents handle routine work and lawyers stay in control. It hires enablement leads, legal solutions engineers, customer success managers, security engineers and account executives in Edinburgh, London and New York. The company is headquartered in Edinburgh, Scotland, United Kingdom.
animahealth.com • HQ: London, United Kingdom • Care Coordination & Population Health • 5000+ employees • Est. 2020 • Trust B • Hiring 6
HQ: London, United Kingdom • Care Coordination & Population Health • 5000+ employees • Est. 2020 • Trust B • Hiring 6
Anima is a London health technology company founded in 2020 that builds care navigation software for general practice. Its platform collects patient requests through structured online consultations, then triages and routes them so that clinicians see a prepared case rather than an unsorted queue. The company works with primary care networks in England trying to manage demand without adding appointments.
