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.
pleo.io • HQ: Copenhagen, Denmark • Cards & Card Issuing • Procurement & Spend Management • 501-1000 employees • Est. 2015 • Trust A • Hiring 26, 6 new
HQ: Copenhagen, Denmark • Cards & Card Issuing • Procurement & Spend Management • 501-1000 employees • Est. 2015 • Trust A • Hiring 26, 6 new
Pleo is a major European FinTech unicorn and smart business spend management enterprise headquartered in Copenhagen, Denmark. Founded in 2015 by Fintech entrepreneurs Jeppe Rindom (CEO) and Niccolo Perra, the company operates on a B2B SaaS subscription model combined with interchange revenue from corporate card transactions.
faculty.ai • HQ: London, United Kingdom • Management Consulting • Custom Software Development • Decision Intelligence • AI Consulting & Integration • 201-500 employees • Est. 2014 • Startup • Trust B • Hiring 65, 7 new
HQ: London, United Kingdom • Management Consulting • Custom Software Development • Decision Intelligence • AI Consulting & Integration • 201-500 employees • Est. 2014 • Startup • Trust B • Hiring 65, 7 new
Faculty is an artificial intelligence technology company headquartered in London, United Kingdom, and founded in 2014. The firm provides services including AI strategy consulting, custom software development, and specialized talent programs to help organizations implement decision intelligence. It operates as a subsidiary of Accenture and serves a global client base across sectors such as defense, healthcare, and energy, focusing on the safe and high-performance deployment of AI solutions.
kernel.ai • HQ: London, United Kingdom • B2B Company & Contact Data • Data Quality & Observability • Startup • Hiring 15, 6 new
HQ: London, United Kingdom • B2B Company & Contact Data • Data Quality & Observability • Startup • Hiring 15, 6 new
Kernel builds a business identity layer that gives AI agents and sales and operations teams trustworthy company data. It cleans duplicated records, fills in missing parent companies and corrects outdated addresses in CRMs, ERPs and third-party datasets. The company is headquartered in London, United Kingdom.
natwestgroup.com • HQ: Edinburgh, United Kingdom • Financial Services • Wealth Management & Financial Advisors • Commercial & Retail Banks • 1001-5000 employees • Est. 1727 • NYSE: NWG • Trust B • Hiring 133, 9 new
HQ: Edinburgh, United Kingdom • Financial Services • Wealth Management & Financial Advisors • Commercial & Retail Banks • 1001-5000 employees • Est. 1727 • NYSE: NWG • Trust B • Hiring 133, 9 new
NatWest Group is a British banking group with its registered office in Edinburgh that provides retail, commercial and private banking through brands including NatWest, Royal Bank of Scotland, Ulster Bank and Coutts. Formerly the Royal Bank of Scotland Group and listed on the London Stock Exchange, it serves over 20 million customers and runs large operations in London, Edinburgh, Manchester and Bristol plus technology centres in Bengaluru, Gurgaon and Chennai. It hires software, DevOps, infrastructure and site reliability engineers, product owners and technical product managers, regulatory reporting analysts and commercial banking relationship managers.
sierra.ai • HQ: San Francisco, United States • LLM & Generative AI • AI Agents • Conversational AI • 1001-5000 employees • Est. 2023 • Trust A • Hiring 171, 31 new
HQ: San Francisco, United States • LLM & Generative AI • AI Agents • Conversational AI • 1001-5000 employees • Est. 2023 • Trust A • Hiring 171, 31 new
Sierra is an American artificial intelligence company founded in 2023 by Bret Taylor, the former co-chief executive of Salesforce and chairman of OpenAI, together with a former Google engineering leader. It builds conversational agents that handle customer service interactions end to end for large consumer businesses, resolving issues by acting on the company's own systems rather than only answering questions, and it charges per resolved outcome rather than per seat. Headquartered in San Francisco and privately held at a multi-billion dollar valuation, it works with retailers, telecommunications operators, financial services firms and healthcare providers.
itv.com • HQ: London, United Kingdom • Streaming & OTT Platforms • TV Production • Broadcasting • Est. 1955 • Hiring 23, 6 new
HQ: London, United Kingdom • Streaming & OTT Platforms • TV Production • Broadcasting • Est. 1955 • Hiring 23, 6 new
Headquartered in London, United Kingdom, ITV is a public media and television production conglomerate operating as the UK's largest commercial broadcaster. The company functions through two core divisions: Media & Entertainment, which operates its portfolio of free-to-air linear channels and the ITVX streaming platform, and ITV Studios, an international content creator and distributor.
broadridge.com • HQ: Lake Success, United States • Custody & Fund Administration • Financial Software & Embedded Finance • 5000+ employees • Est. 2007 • Trust B • Hiring 250, 22 new
HQ: Lake Success, United States • Custody & Fund Administration • Financial Software & Embedded Finance • 5000+ employees • Est. 2007 • Trust B • Hiring 250, 22 new
Broadridge is an American financial technology company spun out of ADP in 2007 that operates much of the invisible infrastructure behind securities markets. It processes shareholder communications and proxy voting for the large majority of United States public company shares, runs post-trade processing and clearance systems for broker-dealers, and sells wealth management, capital markets and communications platforms to banks and asset managers. Headquartered in New York and listed on the New York Stock Exchange, its revenue is almost entirely recurring because clients cannot easily move the record-keeping systems it operates.
Nationwide Building Society is a UK mutual financial institution headquartered in Swindon, England, providing mortgages, current accounts, savings, credit cards and business banking to its members. Owned by its members rather than shareholders, it is the largest building society in the world, operates a national branch network and acquired Virgin Money UK in 2024. Its openings span software, data and integration engineering, analytics, compliance, risk and audit roles, mortgage technical delivery, customer support and branch management, mainly in Swindon, London, Northampton and Glasgow.
seedtag.com • HQ: Madrid, Spain • Artificial Intelligence • Advertising • Est. 2014 • Hiring 14, 1 new
HQ: Madrid, Spain • Artificial Intelligence • Advertising • Est. 2014 • Hiring 14, 1 new
Seedtag is a Madrid advertising technology company founded in 2014 by two former Google employees. Its contextual advertising engine reads the meaning of articles and images to place ads without using personal identifiers. The company operates across Europe and the Americas and is a reference in cookieless advertising.
≈ $59k – $122k per year (Estimated) • Senior • Madrid • Barcelona • Hamburg • London • Milan • Remote (Germany, France, United Kingdom, Belgium, Italy) • Full-Time • Senior
ripple.com • HQ: San Francisco, United States • Financial Software & Embedded Finance • Blockchain Infrastructure • Stablecoins • Crypto Payments • 1001-5000 employees • Est. 2012 • Trust A • Hiring 88, 12 new
HQ: San Francisco, United States • Financial Software & Embedded Finance • Blockchain Infrastructure • Stablecoins • Crypto Payments • 1001-5000 employees • Est. 2012 • Trust A • Hiring 88, 12 new
Ripple is an American company founded in 2012 that sells cross-border payment and custody infrastructure to financial institutions, built around the XRP Ledger and its associated digital asset. Its history is dominated by a five-year lawsuit from the Securities and Exchange Commission over whether XRP sales constituted unregistered securities offerings, which it largely won in 2023 and which ended in 2025, freeing it to expand in the United States. Headquartered in San Francisco, it has since acquired the prime brokerage Hidden Road and the stablecoin infrastructure firm Rail, and it issues the dollar stablecoin RLUSD.
arqfinance.com • HQ: Mexico City, Mexico • Stablecoins • Currency Exchange & FX Payments • Digital Banks & Neobanks • Est. 2021 • Startup • Trust B • Hiring 24, 5 new
HQ: Mexico City, Mexico • Stablecoins • Currency Exchange & FX Payments • Digital Banks & Neobanks • Est. 2021 • Startup • Trust B • Hiring 24, 5 new
ARQ, formerly known as DolarApp, is a financial technology company that offers digital dollar and euro accounts, international payment cards, and cross-border transfer solutions. Built on stablecoin infrastructure, the platform allows users across Latin America to seamlessly convert currencies, send international payments, and store savings in digital assets. Headquartered in Mexico City, Mexico, the firm operates across the Americas to connect consumers and businesses with global financial markets.
oracle.com • HQ: Austin, United States • CRM Software • HR & Payroll Software • ERP & Business Management Software • Cloud Platforms (IaaS & PaaS) • Databases & DBMS • 5000+ employees • Est. 1977 • NYSE: ORCL • Trust A • Hiring 1071, 98 new
HQ: Austin, United States • CRM Software • HR & Payroll Software • ERP & Business Management Software • Cloud Platforms (IaaS & PaaS) • Databases & DBMS • 5000+ employees • Est. 1977 • NYSE: ORCL • Trust A • Hiring 1071, 98 new
Oracle is an American enterprise technology company founded in 1977 by Larry Ellison, Bob Miner and Ed Oates, and headquartered in Austin, Texas. It built its business on the Oracle Database, still the reference relational engine for large transactional systems, and has expanded into a full applications suite covering finance, human resources, supply chain and customer experience through Fusion Cloud and NetSuite. Its fastest growing segment is Oracle Cloud Infrastructure, which the company has positioned aggressively for AI training and inference workloads through large multi-year capacity contracts.
flowengineering.com • HQ: San Francisco, United States • CAD, PLM & BIM Software • Manufacturing & Industrial Software • 501-1000 employees • Startup • Trust B • Hiring 32, 2 new
HQ: San Francisco, United States • CAD, PLM & BIM Software • Manufacturing & Industrial Software • 501-1000 employees • Startup • Trust B • Hiring 32, 2 new
Flow Engineering develops Flow, a requirements management and verification platform for hardware engineering teams that links requirements, CAD, simulation, code and test data in one living systems graph, with AI agents that propagate changes and run impact analysis. Its customers are aerospace, defense, automotive and hardware companies, and it has announced a three-year strategic partnership with Rivian and Volkswagen Group Technologies. Based in San Francisco with staff in London, Los Angeles, Austin and Washington, it hires software and infrastructure engineers, forward deployed engineers, solutions architects, account executives, deployment strategists and growth marketers.
depop.com • HQ: London, United Kingdom • Marketplaces • Secondhand • 501-1000 employees • Est. 2011 • Trust B • Hiring 19, 1 new
HQ: London, United Kingdom • Marketplaces • Secondhand • 501-1000 employees • Est. 2011 • Trust B • Hiring 19, 1 new
Depop is a London company founded in 2011 that runs a social marketplace for second hand fashion. Its app blends resale listings with a feed and follower model that suits younger sellers building personal brands. The company was acquired by Etsy and continues to operate from London with millions of active users.
blackrock.com • HQ: New York, United States • Asset Management & Funds • 1001-5000 employees • Est. 1988 • NYSE: BLK • Trust A • Hiring 264, 19 new
HQ: New York, United States • Asset Management & Funds • 1001-5000 employees • Est. 1988 • NYSE: BLK • Trust A • Hiring 264, 19 new
BlackRock is an American investment management company and the largest asset manager in the world, managing money for pension funds, insurers, sovereign funds, wealth managers and individual investors through mutual funds, iShares exchange-traded funds and institutional mandates. Founded in 1988 and listed on the New York Stock Exchange, it also sells Aladdin, its investment and risk management technology platform, to other financial institutions. The company is headquartered in New York, New York, United States.
palantir.com • HQ: Denver, United States • Defense AI • Data Integration & ETL Tools • Decision Intelligence • 1001-5000 employees • Est. 2003 • NASDAQ: PLTR • Trust C • Hiring 235, 7 new
HQ: Denver, United States • Defense AI • Data Integration & ETL Tools • Decision Intelligence • 1001-5000 employees • Est. 2003 • NASDAQ: PLTR • Trust C • Hiring 235, 7 new
Palantir Technologies is an American software company founded in 2003 that builds platforms for integrating, analysing and acting on large and fragmented datasets. Its Gotham platform serves defence, intelligence and law enforcement customers, Foundry brings the same data-operating model to commercial industries such as manufacturing, healthcare and energy, and the Artificial Intelligence Platform layers large language models over both. Headquartered in Denver, Colorado and listed on the New York Stock Exchange since 2020, the company is known for deploying forward engineers directly inside customer organisations.
createfuture.com • HQ: Edinburgh, United Kingdom • AI Consulting & Integration • IT Consulting & Digital Transformation • Custom Software Development • 501-1000 employees • Est. 2010 • Trust A • Hiring 41, 1 new
HQ: Edinburgh, United Kingdom • AI Consulting & Integration • IT Consulting & Digital Transformation • Custom Software Development • 501-1000 employees • Est. 2010 • Trust A • Hiring 41, 1 new
CreateFuture is an AI transformation and software engineering partner that builds digital products, platforms, and AI-native solutions for enterprise clients. Headquartered in Edinburgh, Scotland, the company assists organizations across sectors like fintech, energy, and government in modernizing legacy technology and scaling intelligent workflows. Its services span business strategy, cloud infrastructure, customer experience design, and data engineering to drive digital growth.
netcompany.com • HQ: Copenhagen, Denmark • Custom Software Development • Digital Government • Systems Integrators • 5000+ employees • Est. 1999 • IT services • Trust B • Hiring 136, 23 new
HQ: Copenhagen, Denmark • Custom Software Development • Digital Government • Systems Integrators • 5000+ employees • Est. 1999 • IT services • Trust B • Hiring 136, 23 new
Netcompany is a Danish technology company founded in 1999 that builds and operates large digital systems for public sector bodies and private enterprises across northern Europe. It is best known for delivering national-scale platforms for Danish and other government agencies, including tax, benefits, health and identity systems, and it works on a delivery model where it takes end-to-end responsibility for a solution rather than supplying consultants by the hour. Headquartered in Copenhagen and listed on Nasdaq Copenhagen, it employs several thousand people across Denmark, Norway, the Netherlands, the United Kingdom, Poland and Greece.
