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.
accenture.com · HQ: Dublin, Ireland · Business Process Outsourcing (BPO) · Systems Integrators · Management Consulting · IT Consulting & Digital Transformation · 5000+ employees · Est. 1989 · IT services · Trust A · Hiring 5545, 439 new
HQ: Dublin, Ireland · Business Process Outsourcing (BPO) · Systems Integrators · Management Consulting · IT Consulting & Digital Transformation · 5000+ employees · Est. 1989 · IT services · Trust A · Hiring 5545, 439 new
Accenture is a professional services company that began as the consulting arm of the accounting firm Arthur Andersen, separated as Andersen Consulting in 1989 and took its present name in 2001. It is one of the largest technology services organisations in the world, employing well over seven hundred thousand people and running strategy, consulting, technology, operations and industry work for most of the Fortune Global 500. Incorporated in Dublin and built on a delivery network concentrated in India and the Philippines, it has reoriented around cloud migration, cybersecurity and generative AI, which it now books as a distinct multi-billion dollar revenue line.
≈ $99k – $207k per year (Estimated) · Lead · 5+ years exp · In office (Dublin, Ireland, London, United Kingdom, Manchester, United States) · Full-Time · Staff
≈ $92k – $185k per year (Estimated) · Senior · 5+ years exp · In office (Dublin, Ireland, London, United Kingdom, Manchester, United States) · Full-Time · Senior
Cauli is a climate technology company that tackles packaging waste in the United Kingdom using IoT and AI-driven technology. Its job advert says that 10 7 billion items of packaging waste are generated in the UK every year and that the company aims to replace the system rather than tweak it. The company is based in London, United Kingdom.
oceaninfinity.com · HQ: Austin, United States · Geological Survey · Underwater & Marine Robotics · Est. 2017 · Trust A · Hiring 29, 4 new
HQ: Austin, United States · Geological Survey · Underwater & Marine Robotics · Est. 2017 · Trust A · Hiring 29, 4 new
Ocean Infinity is a marine robotics and ocean technology company specializing in subsea data acquisition, seabed mapping, and deep-water survey operations. Headquartered in Austin, Texas, and Southampton, United Kingdom, the firm operates large fleets of autonomous underwater vehicles and uncrewed surface vessels equipped with advanced sensor technology. By deploying remote-control and robotic solutions, it provides energy companies, scientific research institutions, and defense organizations with safer and lower-emission ocean intelligence.
fanvue.com · HQ: London, United Kingdom · Creator & Fan Platforms · Subscription Commerce · 51-200 employees · Est. 2021 · Trust B · Hiring 9, 1 new
HQ: London, United Kingdom · Creator & Fan Platforms · Subscription Commerce · 51-200 employees · Est. 2021 · Trust B · Hiring 9, 1 new
Fanvue is a creator subscription platform that lets creators keep 80 percent of their earnings from the first day. It announced a 22 million dollar Series A in January 2026 and hires engineering interns, creative and growth leaders, creator success representatives and tax and treasury analysts. The company is headquartered in London, United Kingdom.
8thlight.com · HQ: Chicago, United States · UI/UX Design · IT Consulting & Digital Transformation · Custom Software Development · Est. 2006 · Hiring 5
HQ: Chicago, United States · UI/UX Design · IT Consulting & Digital Transformation · Custom Software Development · Est. 2006 · Hiring 5
8th Light is a software consultancy that designs, builds and modernises custom software for organisations, offering software engineering, product design, data and platform services. Founded in 2006, it works with clients in the United States and the United Kingdom, with teams in Chicago, London and New York. The company is headquartered in Chicago, Illinois, United States.
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figma.com · HQ: San Francisco, United States · Design & Prototyping Tools · Digital Design · 1001-5000 employees · Est. 2012 · NYSE: FIG · Trust A · Hiring 132, 14 new
HQ: San Francisco, United States · Design & Prototyping Tools · Digital Design · 1001-5000 employees · Est. 2012 · NYSE: FIG · Trust A · Hiring 132, 14 new
Figma is an American design software company founded in 2012 that built a full interface design tool inside the browser, which made real-time multiplayer editing the default rather than an add-on. Its products now cover interface design and prototyping, whiteboarding through FigJam, developer handoff, slide decks and a code generation product that turns designs into working front-end components. Headquartered in San Francisco, it listed on the New York Stock Exchange in 2025 after regulators blocked an attempted acquisition by Adobe, and it has become the default design tool at most software companies.
scale.com · HQ: San Francisco, United States · LLM & Generative AI · AI Evaluation & Observability · AI Training Data & Annotation · 1001-5000 employees · Est. 2016 · Trust B · Hiring 160, 6 new
HQ: San Francisco, United States · LLM & Generative AI · AI Evaluation & Observability · AI Training Data & Annotation · 1001-5000 employees · Est. 2016 · Trust B · Hiring 160, 6 new
Scale AI is an American company founded in San Francisco in 2016 that supplies the training data, evaluation and tooling behind large artificial intelligence systems. It began with human-labelled annotation for autonomous driving and computer vision, then expanded into reinforcement learning from human feedback, expert data generation, model evaluation and full-stack deployment platforms for enterprises and governments. In 2025 Meta acquired a large minority stake and hired co-founder Alexandr Wang, after which the company continued under new leadership serving defence, public sector and commercial customers.
jamf.com · HQ: Minneapolis, United States · Cybersecurity · Endpoint Security · IT Service & Asset Management · 1001-5000 employees · Est. 2002 · Trust B · Hiring 25, 2 new
HQ: Minneapolis, United States · Cybersecurity · Endpoint Security · IT Service & Asset Management · 1001-5000 employees · Est. 2002 · Trust B · Hiring 25, 2 new
Jamf is a software company that provides Apple device management and security for businesses, schools and government organisations, covering Mac, iPhone and iPad enrollment, app deployment, identity, endpoint protection and compliance. Founded in 2002 in Eau Claire, Wisconsin, it serves tens of thousands of customers worldwide and has major offices in Europe, including Brno, Katowice, Amsterdam and London. The company is headquartered in Minneapolis, Minnesota, United States.
fortinet.com · HQ: Sunnyvale, United States · Endpoint Security · Network Security · Information Security · 5000+ employees · Est. 2000 · NASDAQ: FTNT · Trust A · Hiring 565, 39 new
HQ: Sunnyvale, United States · Endpoint Security · Network Security · Information Security · 5000+ employees · Est. 2000 · NASDAQ: FTNT · Trust A · Hiring 565, 39 new
Fortinet is an American cybersecurity company founded in 2000 by two brothers who had previously built the intrusion prevention firm NetScreen. It is best known for FortiGate, a firewall built around custom silicon that gives it a price and throughput advantage over software-only competitors, and it has extended that installed base into a wide security platform covering secure access service edge, endpoint protection, security operations and switching and wireless. Headquartered in Sunnyvale and listed on Nasdaq, it sells almost entirely through channel partners and is unusually strong with mid-sized enterprises and service providers.
americanexpress.com · HQ: New York, United States · Commercial & Retail Banks · Payment Processing & Gateways · Cards & Card Issuing · 5000+ employees · Est. 1850 · Trust A · Hiring 257, 69 new
HQ: New York, United States · Commercial & Retail Banks · Payment Processing & Gateways · Cards & Card Issuing · 5000+ employees · Est. 1850 · Trust A · Hiring 257, 69 new
American Express is a New York financial services company founded in 1850 as an express freight business that became a payments network and card issuer. Unlike the four-party networks it competes with, it issues most of its own cards and operates its own network, which lets it earn merchant discount revenue as well as interest and annual fees, and supports a premium rewards proposition built on travel and lounge access. Its business spans consumer and small business cards, corporate payments, merchant acquiring and travel services, and it is a component of the Dow Jones Industrial Average.
adclear.ai · HQ: London, United Kingdom · AI Agents · RegTech, AML & Compliance · 11-50 employees · Est. 2024 · Startup · Hiring 5
HQ: London, United Kingdom · AI Agents · RegTech, AML & Compliance · 11-50 employees · Est. 2024 · Startup · Hiring 5
Adclear is a London-based compliance technology company that automates advertising approvals for regulated industries such as banks, lenders and investment platforms. It was founded in 2024, has raised 2.6 million pounds and counts Monzo, Lloyds and PensionBee among its customers. The company is headquartered in London, England, United Kingdom.
aecom.com · HQ: Dallas, United States · Civil & Structural Engineering · Engineering Services · Architecture · Urban Planning · Transport Infrastructure · 5000+ employees · Est. 1990 · NYSE: ACM · Trust B · Hiring 3676, 468 new
HQ: Dallas, United States · Civil & Structural Engineering · Engineering Services · Architecture · Urban Planning · Transport Infrastructure · 5000+ employees · Est. 1990 · NYSE: ACM · Trust B · Hiring 3676, 468 new
AECOM is an American infrastructure consulting firm that became independent in 1990 through a management buyout from the energy group Ashland, and is now one of the largest design and engineering organisations in the world. It plans, designs and manages delivery of transport systems, water and wastewater infrastructure, buildings, environmental remediation and energy projects for public agencies and private developers across roughly one hundred and fifty countries. Headquartered in Dallas after relocating from Los Angeles, the company sold its self-perform construction and government services arms to concentrate on higher-margin professional services rather than carrying construction risk.
capitalone.com · HQ: McLean, United States · Leasing, Auto & Equipment Finance · Commercial & Retail Banks · Cards & Card Issuing · 5000+ employees · Est. 1994 · Trust B · Hiring 1503, 179 new
HQ: McLean, United States · Leasing, Auto & Equipment Finance · Commercial & Retail Banks · Cards & Card Issuing · 5000+ employees · Est. 1994 · Trust B · Hiring 1503, 179 new
Capital One is an American bank founded in 1994 that began as a credit card monoline built on statistical testing of offers and pricing, an approach it called information-based strategy. It is now one of the largest card issuers in the United States alongside a national direct bank, an auto lending business and a commercial bank, and it completed the acquisition of Discover in 2025, which gave it a payments network of its own rather than dependence on Visa and Mastercard. Headquartered in McLean, Virginia, it was also an early mover among large banks in migrating its entire technology estate to the public cloud.
Landytech is a London financial technology company founded in 2016 that consolidates investment reporting for asset owners. Its Sesame platform aggregates holdings across banks, funds and private assets into one performance and risk view for family offices and institutions. The company handles data collection and normalisation as part of the service.
bullish.com · HQ: New York, United States · Financial News & Media · Crypto Exchanges · 201-500 employees · Est. 2020 · NYSE: BLSH · Hiring 19, 1 new
HQ: New York, United States · Financial News & Media · Crypto Exchanges · 201-500 employees · Est. 2020 · NYSE: BLSH · Hiring 19, 1 new
Bullish is a global digital asset platform that provides regulated market infrastructure, institutional-grade cryptocurrency exchange services, and financial information tools. The company combines a central limit order book with automated market-making technology to deliver deep liquidity and compliance-focused spot and derivatives trading for institutional investors. Additionally, the firm owns major media and data assets, including CoinDesk, expanding its presence across digital asset news, indices, and industry events.
coindesk.com · HQ: New York, United States · Financial Data & Market Intelligence · Digital Media · Financial News & Media · 501-1000 employees · Est. 2013 · Hiring 17, 1 new
HQ: New York, United States · Financial Data & Market Intelligence · Digital Media · Financial News & Media · 501-1000 employees · Est. 2013 · Hiring 17, 1 new
CoinDesk is a prominent news, research, and media platform that provides comprehensive coverage of cryptocurrencies, digital assets, and blockchain technology. The publication delivers breaking news, market data, regulatory analysis, and institutional insights to crypto investors, technology developers, and industry professionals globally. Beyond digital publishing, the organization hosts major industry conferences - most notably Consensus - and produces benchmark crypto price indices and market indicators used across the financial sector.
