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.
frankenburg.tech · HQ: Tallinn, Estonia · Defense Manufacturing · Missiles · 11-50 employees · Est. 2024 · Hiring 9, 1 new
HQ: Tallinn, Estonia · Defense Manufacturing · Missiles · 11-50 employees · Est. 2024 · Hiring 9, 1 new
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.
quantexa.com · HQ: London, United Kingdom · Financial AI · Master Data Management · Fraud Detection · Decision Intelligence · 501-1000 employees · Est. 2016 · Startup · Trust B · Hiring 31, 9 new
HQ: London, United Kingdom · Financial AI · Master Data Management · Fraud Detection · Decision Intelligence · 501-1000 employees · Est. 2016 · Startup · Trust B · Hiring 31, 9 new
Quantexa is a global decision intelligence company that helps organizations solve complex data challenges in risk, compliance, and strategic growth. Headquartered in London, United Kingdom, the enterprise utilizes advanced AI and entity resolution technology to connect siloed data into contextual network views. Its platform enables banks, public sector institutions, and insurance firms to automate decision-making processes, combat financial crime, and mitigate fraud.
refractal-ai.com · New York · London · Boston · Austin · Podgorica · Cybersecurity AI · Cybersecurity · Artificial Intelligence · 501-1000 employees · Est. 2024 · Startup · Hiring 28
New York · London · Boston · Austin · Podgorica · Cybersecurity AI · Cybersecurity · Artificial Intelligence · 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.
HQ: London, United Kingdom · Clinical Trial Services (CRO) · 51-200 employees · Est. 2021 · Startup · Hiring 3
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 · HQ: Unterschleißheim, Germany · Low-Code & No-Code Platforms · AI Development Tools · 501-1000 employees · Est. 2023 · Startup · Trust B · Hiring 74, 3 new
HQ: Stockholm, Sweden · HQ: Unterschleißheim, Germany · Low-Code & No-Code Platforms · AI Development Tools · 501-1000 employees · Est. 2023 · Startup · Trust B · Hiring 74, 3 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 · Vacation Rentals · Travel & Tourism · Travel Agencies · 1001-5000 employees · Trust B · Hiring 116, 10 new
HQ: Seattle, United States · Vacation Rentals · Travel & Tourism · Travel Agencies · 1001-5000 employees · Trust B · Hiring 116, 10 new
Headquartered in Seattle, Washington, Expedia Group is a leading global travel technology company that operates a comprehensive portfolio of online travel and booking platforms. The company manages an extensive network of popular consumer brands, including Hotels.com, Vrbo, and its flagship namesake service, enabling users to effortlessly reserve flights, hotels, car rentals, and vacation packages. Through its robust digital marketplace infrastructure and advanced travel solutions, it seamlessly connects millions of travelers with hospitality providers worldwide.
elsevier.com · HQ: Amsterdam, Netherlands · Clinical Decision Support · Scientific & Lab Software · Publishing · 5000+ employees · Est. 1880 · Trust B · Hiring 178, 17 new
HQ: Amsterdam, Netherlands · Clinical Decision Support · Scientific & Lab Software · Publishing · 5000+ employees · Est. 1880 · Trust B · Hiring 178, 17 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.
genpact.com · HQ: New York, United States · Management Consulting · IT Consulting & Digital Transformation · Business Process Outsourcing (BPO) · 5000+ employees · Est. 1997 · NYSE: G · IT services · Trust B · Hiring 791, 96 new
HQ: New York, United States · Management Consulting · IT Consulting & Digital Transformation · Business Process Outsourcing (BPO) · 5000+ employees · Est. 1997 · NYSE: G · IT services · Trust B · Hiring 791, 96 new
Genpact is a professional services company that began in 1997 as a business process unit inside GE Capital in India, and was spun out as an independent firm in 2005. It runs finance and accounting, supply chain, procurement, risk and customer operations on behalf of large enterprises, combining offshore delivery with process reengineering and increasingly with automation rather than pure labour arbitrage. Headquartered in New York and listed on the New York Stock Exchange, the company employs well over a hundred thousand people, mostly in India, and has repositioned its offering around agentic AI embedded into the processes it already operates.
lendable.co.uk · HQ: London, United Kingdom · Consumer Loans & Pawnshops · 501-1000 employees · Est. 2014 · Trust B · Hiring 52, 2 new
HQ: London, United Kingdom · Consumer Loans & Pawnshops · 501-1000 employees · Est. 2014 · Trust B · Hiring 52, 2 new
Lendable is a London-based fintech company that uses artificial intelligence and proprietary technology to automate credit decisions for consumer finance products, including personal loans, credit cards, and car finance. Founded in 2014, the platform connects institutional investors directly with individual borrowers, providing streamlined digital applications that offer instant quotes and fast payouts without long paperwork.
InvestEngine brings unbeatable value and innovation to your investing. No buying and selling fees for 870+ exchange-traded funds from iShares, Vanguard and other leading brands. With powerful tools for automating, diversifying and analysing your portfolio. All you need to grow your wealth. Our portfolios are available in an ISA, General Account, or Business Account for companies — all with easy access and for a minimum investment of only £100.
sees.ai · HQ: Chicago, United States · Drone AI · Drones & UAVs · 11-50 employees · Est. 2018 · Startup · Hiring 10
HQ: Chicago, United States · Drone AI · Drones & UAVs · 11-50 employees · Est. 2018 · Startup · Hiring 10
Sees.ai delivers highly autonomous BVLOS drone inspections for electricity grids, capturing consistent, high-quality asset condition data at national scale.
gresearch.com · HQ: London, United Kingdom · Machine Learning · Hedge Funds & Alternative Investments · 201-500 employees · Est. 2001 · Trust A · Hiring 60, 1 new
HQ: London, United Kingdom · Machine Learning · Hedge Funds & Alternative Investments · 201-500 employees · Est. 2001 · Trust A · Hiring 60, 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.
anduril.com · HQ: Costa Mesa, United States · Defense Manufacturing · C4ISR · Military Drones · Defense AI · 5000+ employees · Est. 2017 · Trust B · Hiring 2219, 153 new
HQ: Costa Mesa, United States · Defense Manufacturing · C4ISR · Military Drones · Defense AI · 5000+ employees · Est. 2017 · Trust B · Hiring 2219, 153 new
Anduril Industries is an American defence technology company founded in 2017 that builds autonomous systems and command software for military and border security customers. Rather than bidding on cost-plus programmes, it develops products with its own capital and sells them as finished systems, from surveillance towers and counter-drone interceptors to underwater vehicles and collaborative combat aircraft. Its Lattice software platform fuses sensor data into a single operating picture and controls the hardware family, and the company is headquartered in Costa Mesa, California with a large manufacturing site in Ohio.
coralogix.com · HQ: Tel Aviv, Israel · Security Operations · Log Management & Analytics · Observability & APM · Est. 2014 · Startup · Hiring 56, 3 new
HQ: Tel Aviv, Israel · Security Operations · Log Management & Analytics · Observability & APM · Est. 2014 · Startup · Hiring 56, 3 new
Coralogix is an observability company founded in 2014 and headquartered in Tel Aviv that offers a telemetry lake platform for ingesting, analysing and storing logs, metrics, traces and security data. Its platform processes data in a streaming pipeline before indexing, keeps it in the customer's own cloud storage and adds APM, real user monitoring, SIEM and AI observability modules with more than 300 integrations, and Gartner named it a Leader in its Magic Quadrant for Observability Platforms. It has offices in Ramat Gan, Boston, Plano, London, San Francisco, Gurgaon and Bucharest and hires software engineers, solution engineers, technical account managers and enterprise sales staff.
nomura.com · HQ: Tokyo, Japan · Wealth Management & Financial Advisors · Asset Management & Funds · Online Brokerage & Trading Platforms · Investment Banking & M&A Advisory · 1001-5000 employees · Est. 1925 · Trust A · Hiring 186, 14 new
HQ: Tokyo, Japan · Wealth Management & Financial Advisors · Asset Management & Funds · Online Brokerage & Trading Platforms · Investment Banking & M&A Advisory · 1001-5000 employees · Est. 1925 · Trust A · Hiring 186, 14 new
Nomura is a Tokyo-based global financial services group, held by Nomura Holdings, that serves individuals, institutions, corporates and governments through wealth management, investment management and wholesale businesses covering global markets and investment banking. Founded in 1925 and listed in Tokyo and New York, it operates an integrated network across about 30 countries and regions, with major hubs in London, New York, Hong Kong and Singapore and a large technology and operations center in Mumbai. Its postings span software and quality engineering, infrastructure operations, risk, liquidity and treasury, audit, legal, procurement and investment banking roles.
citystgeorges.ac.uk · HQ: London, United Kingdom · Higher Education · 501-1000 employees · Hiring 44, 9 new
HQ: London, United Kingdom · Higher Education · 501-1000 employees · Hiring 44, 9 new
City St George's, University of London is a university in London that combines teaching and research across disciplines such as digital technology, the built environment and health. It employs postdoctoral research associates, student engagement and funding officers, planning and data analysts and operations managers. The university is based in London, United Kingdom.
nala.com · HQ: New York, United States · Money Transfer & Remittances · 51-200 employees · Startup · Hiring 2
HQ: New York, United States · Money Transfer & Remittances · 51-200 employees · Startup · Hiring 2
NALA is an international money transfer app that facilitates fast, reliable, and secure cross-border money transfers from the UK, US, and Europe to various African countries including Tanzania, Kenya, Nigeria, Uganda, Ghana, and more. With over 500,000 trusted users, NALA provides some of the most competitive exchange rates on the market and allows for real-time financial management via its user-friendly mobile app. Known for its transparency and exceptional customer service, NALA ensures 95% of its transfers are delivered within minutes, catering especially to the global diaspora.
publicisgroupe.com · HQ: Paris, France · Creative Agencies · Digital Marketing · Advertising · 5000+ employees · Est. 1926 · Trust A · Hiring 1278, 191 new
HQ: Paris, France · Creative Agencies · Digital Marketing · Advertising · 5000+ employees · Est. 1926 · Trust A · Hiring 1278, 191 new
Publicis Groupe is a French multinational advertising and communications group headquartered in Paris that provides creative, media, data, commerce and digital transformation services to brands around the world. Founded in 1926 by Marcel Bleustein-Blanchet, it spans creative agency networks, Publicis Media, the data marketing company Epsilon, Publicis Sapient and Publicis Health, with around 100,000 employees in more than 100 countries. It hires account managers, media planners and analysts, SEO and paid media specialists, designers and content producers, and software, data and quality engineers for Publicis Sapient.
loveholidays.com · HQ: London, United Kingdom · Travel Technology · Travel Agencies · 201-500 employees · Est. 2012 · Trust A · Hiring 15, 1 new
HQ: London, United Kingdom · Travel Technology · Travel Agencies · 201-500 employees · Est. 2012 · Trust A · Hiring 15, 1 new
loveholidays is an online travel agency serving the United Kingdom and Ireland that sells package holidays combining flights, hotels and transfers through its website and app. Its in-house technology searches large volumes of flight and hotel inventory to build and price holidays dynamically, and it also trades in Germany. The company was founded in 2012. The company is headquartered in London, England, United Kingdom.
