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.
interactivebrokers.com · HQ: Greenwich, United States · Online Brokerage & Trading Platforms · 1001-5000 employees · Est. 1978 · Trust A · Hiring 112, 2 new
HQ: Greenwich, United States · Online Brokerage & Trading Platforms · 1001-5000 employees · Est. 1978 · Trust A · Hiring 112, 2 new
Interactive Brokers is an automated global electronic brokerage headquartered in Greenwich, Connecticut, giving individual traders, advisors and institutions direct access to stocks, options, futures, currencies and bonds on markets worldwide. Founded by Thomas Peterffy in 1978 and listed on Nasdaq, it builds most of its trading and clearing technology in-house and runs offices in Chicago, Zug, Budapest, Tallinn, Dublin, Mumbai, Hong Kong and London, as well as the ForecastEx event contract exchange. Hiring covers software and platform engineers, client services associates, AML and KYC analysts, finance controllers, quant analysts and interns.
astronomer.io · HQ: New York, United States · Data Integration & ETL Tools · Data Transformation & Orchestration · 501-1000 employees · Est. 2015 · Startup · Trust B · Hiring 18, 1 new
HQ: New York, United States · Data Integration & ETL Tools · Data Transformation & Orchestration · 501-1000 employees · Est. 2015 · Startup · Trust B · Hiring 18, 1 new
Astronomer is the commercial company behind Apache Airflow and its managed Astro platform for building, running and scaling data pipelines and orchestration. It is trusted by more than 800 enterprises and hires platform engineers, sales engineers, sales development and marketing staff. The company is headquartered in New York, United States.
elyos.ai · HQ: London, United Kingdom · AI Agents · Field Service Management Software · Conversational AI · 201-500 employees · Startup · Trust B · Hiring 9
HQ: London, United Kingdom · AI Agents · Field Service Management Software · Conversational AI · 201-500 employees · Startup · Trust B · Hiring 9
Elyos AI builds AI voice agents for trade and field service businesses. Its agents answer customer calls, book jobs and confirm appointments, and integrate with field service platforms including Simpro, ServiceTitan and Joblogic, so contractors can handle more demand without hiring extra office staff. The company is headquartered in London, United Kingdom, and also sells in the United States.
hook.co · HQ: Wilmington, United States · Customer Support & Help Desk Software · AI Agents · 51-200 employees · Est. 2017 · Startup · Hiring 4, 1 new
HQ: Wilmington, United States · Customer Support & Help Desk Software · AI Agents · 51-200 employees · Est. 2017 · Startup · Hiring 4, 1 new
Hook stops churn before it starts. Our AI agents predict risk up to 6 months ahead, tell you exactly what to do next, and execute the busy work. Spot patterns that matter, act sooner, and grow NRR - all without adding headcount.
schonfeld.com · HQ: New York, United States · Asset Management & Funds · Hedge Funds & Alternative Investments · 501-1000 employees · Est. 1988 · Trust A · Hiring 65, 6 new
HQ: New York, United States · Asset Management & Funds · Hedge Funds & Alternative Investments · 501-1000 employees · Est. 1988 · Trust A · Hiring 65, 6 new
Schonfeld Strategic Advisors is a multi-strategy, multi-manager hedge fund headquartered in New York City that allocates capital to internal and partner portfolio manager teams across quantitative, fundamental equity, tactical trading and discretionary macro and fixed income strategies. Founded in 1988 by Steven Schonfeld as a proprietary trading firm and opened to outside capital in 2015, it is led by CEO and CIO Ryan Tolkin and reports more than 145 PM teams, over $23.5 billion in assets and 1,150 employees. It hires quantitative researchers and developers, software and site reliability engineers, compliance, risk and operations staff, and interns in New York, London and Hong Kong.
healthtech1.uk · HQ: London, United Kingdom · Medical AI · Tech Industry Associations & Clusters · 1-10 employees · Est. 2021 · Startup · Hiring 5, 1 new
HQ: London, United Kingdom · Medical AI · Tech Industry Associations & Clusters · 1-10 employees · Est. 2021 · Startup · Hiring 5, 1 new
Healthtech1 is a London health technology company founded in 2021 that automates administrative processes in general practice. Its software handles patient registration, records summarising and other repetitive back-office tasks that otherwise consume practice staff time. The company works with primary care networks across England.
mimica.ai · HQ: London, United Kingdom · Process Mining · AI Agents · Workflow & Process Automation (RPA, BPM) · 51-200 employees · Est. 2018 · Startup · Trust A · Hiring 14, 1 new
HQ: London, United Kingdom · Process Mining · AI Agents · Workflow & Process Automation (RPA, BPM) · 51-200 employees · Est. 2018 · Startup · Trust A · Hiring 14, 1 new
Mimica is a British software company that builds task mining and process discovery tools for enterprises. Its software records how employees carry out work on their computers, maps the underlying processes and identifies tasks that can be automated, and is used by operations teams and consulting partners in Europe and North America. The company is headquartered in London, England, United Kingdom.
HQ: Zurich, Switzerland · Financial Software & Embedded Finance · 1001-5000 employees · Est. 2017 · Hiring 3, 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 224, 8 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 224, 8 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 73, 1 new
HQ: London, United Kingdom · Asset Management & Funds · Hedge Funds & Alternative Investments · 1001-5000 employees · Est. 2014 · Trust C · Hiring 73, 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 189, 13 new
HQ: Sydney, Australia · iGaming & Gambling · Mobile Games · 5000+ employees · Est. 1953 · Trust A · Hiring 189, 13 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.
pelagohealth.com · HQ: New York, United States · Health Care · Health Insurance & Benefits · Telemedicine & Virtual Care · Addiction Treatment · Est. 2017 · Startup · Trust A · Hiring 10, 2 new
HQ: New York, United States · Health Care · Health Insurance & Benefits · Telemedicine & Virtual Care · Addiction Treatment · Est. 2017 · Startup · Trust A · Hiring 10, 2 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.
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 86, 20 new
HQ: Sankt Gallen, Switzerland · iGaming & Gambling · Sports · Sports Betting · Sports Analytics · Fan Engagement · 1001-5000 employees · Est. 2001 · Trust B · Hiring 86, 20 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.
