Backend Developer jobs in London hiring now at vetted startups and product companies on Alion, updated daily. Average salary around $213,465/year. Compare remote, hybrid and on-site positions with relocation and visa sponsorship. Browse and apply today.
HQ: Zurich, Switzerland • Financial Software & Embedded Finance • 1001-5000 employees • Est. 2017 • Hiring 2, 1 new
Ledgy is a digital equity and executive compensation management platform headquartered in Zurich, Switzerland. Founded in 2017 by Yoko Spirig, Ben Banisch, and Timo Horstschäfer, the company provides automated capitalization table (cap table) management, share plan administration, and financial reporting software designed for high-growth startups and global enterprises. Operating on a B2B SaaS subscription model, Ledgy serves finance, HR, and legal teams by orchestrating employee equity incentive plans, modeling round financing and exit scenarios, automating multi-jurisdictional compliance, and delivering transparent owner dashboards for employees and investors.
investa.bg • HQ: Plovdiv, Bulgaria • Real Estate Appraisal • Property Management • Real Estate Brokerage • Hiring 3
HQ: Plovdiv, Bulgaria • Real Estate Appraisal • Property Management • Real Estate Brokerage • Hiring 3
Investa is a Bulgarian real estate agency that brokers property sales and rentals and manages properties. It also provides valuations by licensed appraisers and prepares business plans for companies. The company is based in Plovdiv, Bulgaria.
edenred.com • HQ: Issy-les-Moulineaux, France • Gift Cards & Loyalty Programs • Human Resources • Payment Processing & Gateways • Cards & Card Issuing • 5000+ employees • Est. 2010 • Trust A • Hiring 226, 21 new
HQ: Issy-les-Moulineaux, France • Gift Cards & Loyalty Programs • Human Resources • Payment Processing & Gateways • Cards & Card Issuing • 5000+ employees • Est. 2010 • Trust A • Hiring 226, 21 new
Edenred is a French company separated from the hospitality group Accor in 2010, and it operates the meal voucher and employee benefit schemes that tax rules in many countries make worth using. Its business is built on float and network effects: employers prepay for benefits, employees spend them at affiliated merchants, and the company earns commission from merchants and fees from employers while holding the balances in between. Headquartered near Paris and listed on Euronext, it also runs fuel and fleet payment cards and corporate payment services across some forty-five countries.
squarepoint-capital.com • HQ: London, United Kingdom • Asset Management & Funds • Hedge Funds & Alternative Investments • 1001-5000 employees • Est. 2014 • Trust C • Hiring 74, 1 new
HQ: London, United Kingdom • Asset Management & Funds • Hedge Funds & Alternative Investments • 1001-5000 employees • Est. 2014 • Trust C • Hiring 74, 1 new
Squarepoint Capital is a global quantitative investment manager that runs systematic trading strategies across equities, fixed income, foreign exchange, commodities and derivatives, built on in-house research, execution and portfolio management technology. Founded in 2014 as a spin-out of the quantitative trading business of Deutsche Bank, it operates offices in North America, Europe and Asia-Pacific, including New York, Montreal, Singapore, Bengaluru and Geneva. The firm is headquartered in London, England, United Kingdom.
Shieldpay is a London company founded in 2016 that provides digital escrow and payment services for complex transactions. Law firms, corporate finance advisers and marketplaces use it to hold and distribute funds during deals and settlements. The company automates the verification and payout work that traditionally ran through client accounts.
aristocrat.com • HQ: Sydney, Australia • iGaming & Gambling • Mobile Games • 5000+ employees • Est. 1953 • Trust A • Hiring 194, 19 new
HQ: Sydney, Australia • iGaming & Gambling • Mobile Games • 5000+ employees • Est. 1953 • Trust A • Hiring 194, 19 new
Aristocrat Leisure is an Australian gaming company founded in 1953 that designs and manufactures slot machines for casinos and has become one of the largest mobile game publishers in the world. Its land-based business supplies cabinets, game content and systems to casino operators across North America, Australia and Asia, while Pixel United publishes free-to-play social casino and casual mobile titles, and a separate online real money gaming division was built through the Anaxi brand and the NeoGames acquisition. Headquartered in Sydney and listed on the Australian exchange, it derives the majority of revenue from North America.
experian.com • HQ: Dublin, Ireland • Fraud Detection • Credit Bureaus & Rating Agencies • 5000+ employees • Est. 1996 • Trust B • Hiring 245, 49 new
HQ: Dublin, Ireland • Fraud Detection • Credit Bureaus & Rating Agencies • 5000+ employees • Est. 1996 • Trust B • Hiring 245, 49 new
Experian is a consumer credit reporting and data analytics company that traces its origins to nineteenth-century credit reference work and was established in its present form in 1996. It maintains credit files on more than a billion people and businesses, and sells scoring, decisioning, fraud prevention and marketing data to lenders, insurers and telecommunications firms, while offering consumers direct access to their own reports and monitoring. The company is registered in Dublin, listed on the London Stock Exchange, and runs its largest operations in the United States, the United Kingdom and Brazil.
pelagohealth.com • HQ: New York, United States • Health Care • Health Insurance & Benefits • Telemedicine & Virtual Care • Addiction Treatment • Est. 2017 • Startup • Trust A • Hiring 11, 1 new
HQ: New York, United States • Health Care • Health Insurance & Benefits • Telemedicine & Virtual Care • Addiction Treatment • Est. 2017 • Startup • Trust A • Hiring 11, 1 new
Pelago is a New York digital health company founded in 2017 that treats substance use, including tobacco, alcohol and opioids. Its programme combines clinicians, medication and behavioural therapy delivered through an app. The company sells to employers and health plans and publishes clinical outcome data.
simplemachines.com • London • Sydney • Christchurch • Liverpool • Data Engineering & Migration Services • Analytics & BI Consulting • Trust A • Hiring 13
London • Sydney • Christchurch • Liverpool • Data Engineering & Migration Services • Analytics & BI Consulting • Trust A • Hiring 13
We're a specialist firm of expert consultants, data architects and engineers building the next generation of data driven organisations.
everfox.com • HQ: Herndon, United States • Network Security • National Security • Information Security • 1001-5000 employees • Est. 2023 • Trust A • Hiring 47, 5 new
HQ: Herndon, United States • Network Security • National Security • Information Security • 1001-5000 employees • Est. 2023 • Trust A • Hiring 47, 5 new
Founded in 2023, Everfox (formerly Forcepoint Federal) is a defense-grade cybersecurity enterprise specializing in cross-domain security, threat protection, and insider risk management. Headquartered in Herndon, Virginia, United States, the company serves governments, defense agencies, and heavily regulated industries worldwide. Through its high-assurance data transfer platforms, hardware-enforced security, and user behavior analytics, it enables secure multi-network collaboration while safeguarding mission-critical systems against complex cyber threats.
lyst.com • HQ: London, United Kingdom • Luxury Retail • Marketplaces • 51-200 employees • Est. 2010 • Hiring 9, 2 new
HQ: London, United Kingdom • Luxury Retail • Marketplaces • 51-200 employees • Est. 2010 • Hiring 9, 2 new
Lyst is a global fashion shopping platform that brings premium and luxury fashion from about 27,000 brands and stores into one place, serving over 160 million shoppers a year. It became part of Zozo, the operator of Zozotown, in 2025 and hires customer operations, partner sales, business development and analytics staff. The company is headquartered in London, United Kingdom.
sportradar.com • HQ: Sankt Gallen, Switzerland • iGaming & Gambling • Sports • Sports Betting • Sports Analytics • Fan Engagement • 1001-5000 employees • Est. 2001 • Trust B • Hiring 72, 7 new
HQ: Sankt Gallen, Switzerland • iGaming & Gambling • Sports • Sports Betting • Sports Analytics • Fan Engagement • 1001-5000 employees • Est. 2001 • Trust B • Hiring 72, 7 new
Sportradar is a Swiss company founded in 2001 that collects live sports data and sells it to betting operators, media companies and sports leagues, and it holds exclusive rights to distribute data from the NBA, NHL, ATP and many other competitions. Its business is a licensing chain: it pays leagues for official data rights, sends people to capture the feed reliably from the venue, and resells it to bookmakers who cannot price in-play markets without it. Headquartered in Sankt Gallen and listed on Nasdaq, it also operates integrity services that monitor betting patterns for match-fixing on behalf of federations.
brain.co • HQ: San Francisco, United States • AI Consulting & Integration • AI Agents • Startup • Trust B • Hiring 35, 1 new
HQ: San Francisco, United States • AI Consulting & Integration • AI Agents • Startup • Trust B • Hiring 35, 1 new
Brain Co. is an American AI company that builds agent-native operating systems for large, regulated institutions, with each system built for a specific industry. Its systems run on Atlas, a proprietary platform that keeps customers in control and avoids lock-in to one model, and it hires AI platform, ML, product and security engineers. The company is headquartered in San Francisco, California, United States.
hammermissions.com • HQ: London, United Kingdom • Drone AI • Computer Vision • Startup • Hiring 1
HQ: London, United Kingdom • Drone AI • Computer Vision • Startup • Hiring 1
AI inspection software for engineering firms and asset owners. Capture with drones or 3D Lidar, detect defects with AI, and produce defensible condition reports.
accurx.com • HQ: London, United Kingdom • Telemedicine & Virtual Care • Patient Access & Booking • 201-500 employees • Est. 2016 • Startup • Trust A • Hiring 11
HQ: London, United Kingdom • Telemedicine & Virtual Care • Patient Access & Booking • 201-500 employees • Est. 2016 • Startup • Trust A • Hiring 11
Accurx is a London company founded in 2016 that builds communication software for the National Health Service. Its tools let general practices and hospitals message patients, run video consultations and coordinate between care teams. The software is used by almost every general practice in England.
elliptic.co • HQ: London, United Kingdom • RegTech, AML & Compliance • Blockchain Analytics • 501-1000 employees • Est. 2013 • Startup • Trust A • Hiring 27, 5 new
HQ: London, United Kingdom • RegTech, AML & Compliance • Blockchain Analytics • 501-1000 employees • Est. 2013 • Startup • Trust A • Hiring 27, 5 new
Elliptic is a blockchain analytics and cryptocurrency compliance software company headquartered in London, United Kingdom, and founded in 2013. The firm develops a platform for real-time wallet and transaction screening, entity due diligence, and cross-chain investigations to detect and prevent financial crime. Serving global financial institutions, digital asset exchanges, and government agencies, the company provides intelligence across more than 65 blockchains and covers the vast majority of global trading volume.
worldquant.com • HQ: Old Greenwich, United States • Hedge Funds & Alternative Investments • 1001-5000 employees • Est. 2007 • Trust B • Hiring 84
HQ: Old Greenwich, United States • Hedge Funds & Alternative Investments • 1001-5000 employees • Est. 2007 • Trust B • Hiring 84
Headquartered in Old Greenwich, Connecticut, WorldQuant is a global quantitative investment management firm and hedge fund. The company develops and deploys systematic trading strategies, predictive algorithmic signals ("alphas"), and data-driven portfolio management models across global equity and financial markets. By combining advanced machine learning, massive financial datasets, and a distributed international network of quantitative researchers, it systematically identifies market inefficiencies to generate consistent, risk-adjusted investment returns.
unmind.com • HQ: London, United Kingdom • HR & Payroll Software • Digital Mental Health • 51-200 employees • Est. 2016 • Startup • Hiring 1
HQ: London, United Kingdom • HR & Payroll Software • Digital Mental Health • 51-200 employees • Est. 2016 • Startup • Hiring 1
Unmind provides a B2B mental health platform that delivers clinically-backed tools and training for organisations. Unmind is based out of London, United Kingdom.
