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.
robinhood.com · HQ: Menlo Park, United States · Crypto Exchanges · Investing Apps & Robo-Advisors · Online Brokerage & Trading Platforms · 1001-5000 employees · Est. 2013 · Trust B · Hiring 142, 13 new
HQ: Menlo Park, United States · Crypto Exchanges · Investing Apps & Robo-Advisors · Online Brokerage & Trading Platforms · 1001-5000 employees · Est. 2013 · Trust B · Hiring 142, 13 new
Robinhood is an American brokerage founded in 2013 that made commission-free trading and fractional shares the industry norm through a mobile-first app aimed at first-time investors. It earns most of its revenue from payment for order flow, net interest on customer cash and margin lending, and a paid subscription tier, and it has expanded from equities and options into cryptocurrency, retirement accounts, prediction markets and a credit card. Headquartered in Menlo Park and listed on Nasdaq, it drew sustained regulatory attention after the meme stock trading restrictions of 2021.
hcompany.ai · HQ: Paris, France · Foundation Models · AI Research Labs · AI Agents · 201-500 employees · Est. 2023 · Startup · Trust A · Hiring 33, 1 new
HQ: Paris, France · Foundation Models · AI Research Labs · AI Agents · 201-500 employees · Est. 2023 · Startup · Trust A · Hiring 33, 1 new
H Company is an artificial intelligence research company headquartered in Paris, France, and founded in 2023 by Charles Kantor with a founding team drawn largely from Google DeepMind. The company develops agentic AI systems, including Runner H, an agent that carries out multi-step tasks in a browser on the user's behalf. It raised one of the largest seed rounds in European history and positions itself as a French alternative in the agent tooling market.
kraken.tech · HQ: London, United Kingdom · Smart Grid · Billing & Subscription Management · Energy Management · 11-50 employees · Est. 2016 · Trust A · Hiring 60, 5 new
HQ: London, United Kingdom · Smart Grid · Billing & Subscription Management · Energy Management · 11-50 employees · Est. 2016 · Trust A · Hiring 60, 5 new
Kraken Technologies is a software company headquartered in London that builds Kraken, an operating platform for energy and utility companies covering billing, customer service, smart meter data, flexibility and grid operations. Created inside Octopus Energy Group in 2016, it now licenses its platform to energy suppliers and utilities such as EDF, E.ON Next, Origin Energy and Tokyo Gas, managing tens of millions of customer accounts worldwide. It hires software engineers, client data and analytics leads, implementation and delivery managers, people and compensation specialists and commercial staff.
deloitte.com · HQ: London, United Kingdom · Management Consulting · Financial Advisory, Valuation & Restructuring · Tax Advisory & Preparation · Audit & Assurance Firms · 1001-5000 employees · Est. 1845 · Trust A · Hiring 557, 96 new
HQ: London, United Kingdom · Management Consulting · Financial Advisory, Valuation & Restructuring · Tax Advisory & Preparation · Audit & Assurance Firms · 1001-5000 employees · Est. 1845 · Trust A · Hiring 557, 96 new
Deloitte is one of the "Big Four" global accounting and professional services firms, providing audit, tax, consulting, and risk advisory services to organizations worldwide. Founded in London in 1845, it operates as a multinational network of independent member firms spanning over 150 countries and territories. Known for its extensive market reach and industry expertise, the organization serves a vast majority of the Fortune Global 500 companies.
ankura.com · HQ: Washington, United States · Financial Advisory, Valuation & Restructuring · Management Consulting · 1001-5000 employees · Est. 2014 · Trust B · Hiring 76, 6 new
HQ: Washington, United States · Financial Advisory, Valuation & Restructuring · Management Consulting · 1001-5000 employees · Est. 2014 · Trust B · Hiring 76, 6 new
Ankura is a business advisory and expert services firm headquartered in Washington, DC, offering disputes and economics, forensics and investigations, turnaround and restructuring, risk and compliance, cybersecurity and data privacy, transaction and strategic communications services. Founded in 2014, it works from offices across North America, Europe, the Middle East and Asia Pacific, opened a Riyadh office in 2023 and since 2025 includes the public affairs agency Red Flag. Hiring covers university associates and interns in disputes, valuation and forensics, restructuring managing directors, cybersecurity architects, conflict analysts and public affairs account staff.
caci.co.uk · London · Bristol · Hyderabad · Pune · Cheltenham · Custom Software Development · IT Consulting & Digital Transformation · 1001-5000 employees · Est. 1975 · Trust B · Hiring 38, 4 new
London · Bristol · Hyderabad · Pune · Cheltenham · Custom Software Development · IT Consulting & Digital Transformation · 1001-5000 employees · Est. 1975 · Trust B · Hiring 38, 4 new
At CACI, we connect data, technology, and human insight to build smarter, scalable solutions that fuel progress and create real-world impact.
easyjet.com · HQ: Luton, United Kingdom · Air Transport · Commercial Aviation · 5000+ employees · Est. 1995 · Hiring 43, 4 new
HQ: Luton, United Kingdom · Air Transport · Commercial Aviation · 5000+ employees · Est. 1995 · Hiring 43, 4 new
easyJet is a major British multinational low-cost airline group that operates domestic and international point-to-point passenger flights alongside holiday travel packages. Headquartered at London Luton Airport in Luton, United Kingdom, the carrier connects hundreds of key European airports and leisure destinations with an extensive fleet of modern aircraft. Founded in 1995, it has grown into one of Europe's largest aviation networks, recognized for its budget-friendly travel model and prominent regional presence.
disguise.one · HQ: London, United Kingdom · Video Production · Pro AV & Digital Signage · 201-500 employees · Est. 2000 · Hiring 4
HQ: London, United Kingdom · Video Production · Pro AV & Digital Signage · 201-500 employees · Est. 2000 · Hiring 4
disguise is a London company that builds the media servers and software used to drive large-scale live visuals. Its systems power concert tours, broadcast sets and extended reality stages where camera tracking must match rendered content frame by frame. The company is a standard tool in touring production and virtual production worldwide.
lumalabs.ai · HQ: Palo Alto, United States · Generative 3D · Generative Image · Generative Video · 201-500 employees · Est. 2021 · Startup · Hiring 25
HQ: Palo Alto, United States · Generative 3D · Generative Image · Generative Video · 201-500 employees · Est. 2021 · Startup · Hiring 25
Luma AI is an artificial intelligence company that specializes in building advanced 3D visual technology and generative AI tools. Founded in 2021, the company is best known for its realistic text-to-3D models, NeRF (Neural Radiance Fields) capture app, and its high-quality video generation model, Dream Machine. By enabling creators and developers to easily capture, generate, and edit photorealistic 3D assets and video, it aims to make next-generation digital media creation accessible to everyone.
frankenburg.tech · HQ: Tallinn, Estonia · Defense Manufacturing · Missiles · 11-50 employees · Est. 2024 · Hiring 10
HQ: Tallinn, Estonia · Defense Manufacturing · Missiles · 11-50 employees · Est. 2024 · Hiring 10
Frankenburg Technologies is an Estonian defence technology company founded in 2024 and based in Tallinn. It develops low-cost guided missiles and air defence interceptors. The company was founded by a former Estonian defence official.
refractal-ai.com · New York · London · Boston · Austin · Podgorica · AI Safety & Alignment · Cybersecurity AI · 501-1000 employees · Est. 2024 · Startup · Hiring 28
New York · London · Boston · Austin · Podgorica · AI Safety & Alignment · Cybersecurity AI · 501-1000 employees · Est. 2024 · Startup · Hiring 28
Refractal builds security infrastructure for high-assurance AI. Stress test agents before deployment, protect them in production, and stay compliant.
lindushealth.com · HQ: London, United Kingdom · Clinical Trial Services (CRO) · 51-200 employees · Est. 2021 · Startup · Hiring 4, 1 new
HQ: London, United Kingdom · Clinical Trial Services (CRO) · 51-200 employees · Est. 2021 · Startup · Hiring 4, 1 new
Lindus Health is an artificial intelligence native contract research organisation that runs clinical trials end to end. Founded in 2021 in London, it automates protocol design, site work and data management that legacy providers do manually. Biotech sponsors use it to cut trial timelines and fixed costs.
lovable.dev · HQ: Stockholm, Sweden · Low-Code & No-Code Platforms · AI Development Tools · 501-1000 employees · Est. 2023 · Startup · Trust B · Hiring 75, 4 new
HQ: Stockholm, Sweden · Low-Code & No-Code Platforms · AI Development Tools · 501-1000 employees · Est. 2023 · Startup · Trust B · Hiring 75, 4 new
Lovable is an AI-powered software development platform headquartered in Stockholm, Sweden. Founded in 2023 by Anton Osika and Fabian Hedin, the company operates a conversational "vibe coding" environment that enables both non-technical creators and software engineers to build, iterate, and deploy full-stack web applications using natural language prompts. Lovable automates front-end UI generation, back-end code creation, database connections, and GitHub workflow syncing, allowing users to move rapidly from product idea to production-ready application.
expedia.com · HQ: Seattle, United States · Travel Technology · 1001-5000 employees · Est. 1996 · Trust A · Hiring 122, 17 new
HQ: Seattle, United States · Travel Technology · 1001-5000 employees · Est. 1996 · Trust A · Hiring 122, 17 new
Expedia Group is an American online travel company headquartered in Seattle, Washington, that runs booking platforms for hotels, flights, car rentals, vacation rentals and holiday packages. Its consumer brands include Expedia, Hotels.com and Vrbo, and its B2B business supplies travel inventory and booking technology to partners. Founded in 1996 as a division of Microsoft and spun off in 1999, it is listed on Nasdaq. It hires product managers, machine learning and data scientists, finance and procurement staff in Seattle, Austin, San Jose and other cities.
elsevier.com · HQ: Amsterdam, Netherlands · Clinical Decision Support · Scientific & Lab Software · Publishing · 5000+ employees · Est. 1880 · Trust B · Hiring 188, 30 new
HQ: Amsterdam, Netherlands · Clinical Decision Support · Scientific & Lab Software · Publishing · 5000+ employees · Est. 1880 · Trust B · Hiring 188, 30 new
Elsevier is a Dutch scientific, technical and medical information and analytics company headquartered in Amsterdam that publishes journals and books and builds research and clinical decision tools such as ScienceDirect, Scopus and ClinicalKey. Founded in 1880 and owned by the RELX group, it serves researchers, universities, hospitals and healthcare professionals worldwide, with large offices in London, Oxford, Philadelphia, New York, Chennai and Bengaluru. It hires software, data and site reliability engineers, AI engineers, product managers, journal editors, publishing and client success consultants, and solution and sales consultants.
corpay.com · HQ: Atlanta, United States · Payment Processing & Gateways · Currency Exchange & FX Payments · Procurement & Spend Management · Cards & Card Issuing · 5000+ employees · Est. 1986 · NYSE: CPAY · Trust A · Hiring 127, 32 new
HQ: Atlanta, United States · Payment Processing & Gateways · Currency Exchange & FX Payments · Procurement & Spend Management · Cards & Card Issuing · 5000+ employees · Est. 1986 · NYSE: CPAY · Trust A · Hiring 127, 32 new
Corpay, known as FLEETCOR Technologies until 2024, is a US business payments company headquartered in Atlanta, Georgia. It provides fuel and fleet cards, lodging payment programs, corporate cards, automated accounts payable, and cross-border payments and currency risk management services to businesses. Listed on the New York Stock Exchange, it operates internationally with large teams in the United Kingdom, the Czech Republic and India.
lendable.co.uk · HQ: London, United Kingdom · Consumer Loans & Pawnshops · 501-1000 employees · Est. 2014 · Trust A · Hiring 59, 8 new
HQ: London, United Kingdom · Consumer Loans & Pawnshops · 501-1000 employees · Est. 2014 · Trust A · Hiring 59, 8 new
Lendable is a London-based consumer finance company that uses its own automated credit decisioning technology to offer personal loans, credit cards and car finance. Founded in 2014, it provides online applications with instant quotes and funds its lending through institutional investors. Besides London it has teams in Chatham, Arlington in Virginia and Mexico City, and hires analysts, engineers, customer service staff and legal and growth roles.
gresearch.com · HQ: London, United Kingdom · Machine Learning · Hedge Funds & Alternative Investments · 201-500 employees · Est. 2001 · Trust A · Hiring 58, 1 new
HQ: London, United Kingdom · Machine Learning · Hedge Funds & Alternative Investments · 201-500 employees · Est. 2001 · Trust A · Hiring 58, 1 new
G-Research is a quantitative research and technology firm headquartered in London that applies machine learning, big data and high-performance computing to predict movements in global financial markets. It brings researchers and engineers together in its Soho Place office in central London, opened in 2023, has a further office in Dallas, and funds PhD prizes, monthly research grants and work experience programmes for students. It hires quantitative researchers and developers, C++ and machine learning engineers, Kubernetes and platform engineers, network and database engineers, engineering managers and analytics staff.
