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.
corpay.com · HQ: Atlanta, United States · Payment Processing & Gateways · Currency Exchange & FX Payments · Procurement & Spend Management · Cards & Card Issuing · 5000+ employees · Est. 1986 · NYSE: CPAY · Trust A · Hiring 127, 32 new
HQ: Atlanta, United States · Payment Processing & Gateways · Currency Exchange & FX Payments · Procurement & Spend Management · Cards & Card Issuing · 5000+ employees · Est. 1986 · NYSE: CPAY · Trust A · Hiring 127, 32 new
Corpay, known as FLEETCOR Technologies until 2024, is a US business payments company headquartered in Atlanta, Georgia. It provides fuel and fleet cards, lodging payment programs, corporate cards, automated accounts payable, and cross-border payments and currency risk management services to businesses. Listed on the New York Stock Exchange, it operates internationally with large teams in the United Kingdom, the Czech Republic and India.
lendable.co.uk · HQ: London, United Kingdom · Consumer Loans & Pawnshops · 501-1000 employees · Est. 2014 · Trust A · Hiring 59, 8 new
HQ: London, United Kingdom · Consumer Loans & Pawnshops · 501-1000 employees · Est. 2014 · Trust A · Hiring 59, 8 new
Lendable is a London-based consumer finance company that uses its own automated credit decisioning technology to offer personal loans, credit cards and car finance. Founded in 2014, it provides online applications with instant quotes and funds its lending through institutional investors. Besides London it has teams in Chatham, Arlington in Virginia and Mexico City, and hires analysts, engineers, customer service staff and legal and growth roles.
gresearch.com · HQ: London, United Kingdom · Machine Learning · Hedge Funds & Alternative Investments · 201-500 employees · Est. 2001 · Trust A · Hiring 58, 1 new
HQ: London, United Kingdom · Machine Learning · Hedge Funds & Alternative Investments · 201-500 employees · Est. 2001 · Trust A · Hiring 58, 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 2239, 166 new
HQ: Costa Mesa, United States · Defense Manufacturing · C4ISR · Military Drones · Defense AI · 5000+ employees · Est. 2017 · Trust B · Hiring 2239, 166 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 53, 1 new
HQ: Tel Aviv, Israel · Security Operations · Log Management & Analytics · Observability & APM · Est. 2014 · Startup · Hiring 53, 1 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 181, 9 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 181, 9 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 51, 6 new
HQ: London, United Kingdom · Higher Education · 501-1000 employees · Hiring 51, 6 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 3, 1 new
HQ: New York, United States · Money Transfer & Remittances · 51-200 employees · Startup · Hiring 3, 1 new
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 1351, 215 new
HQ: Paris, France · Creative Agencies · Digital Marketing · Advertising · 5000+ employees · Est. 1926 · Trust A · Hiring 1351, 215 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 16, 1 new
HQ: London, United Kingdom · Travel Technology · Travel Agencies · 201-500 employees · Est. 2012 · Trust A · Hiring 16, 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.
v7labs.com · HQ: London, United Kingdom · AI Training Data & Annotation · Est. 2018 · Startup · Hiring 6
HQ: London, United Kingdom · AI Training Data & Annotation · Est. 2018 · Startup · Hiring 6
V7 is a London company founded in 2018 that builds training data and workflow automation software for artificial intelligence teams. Its Darwin platform handles image, video and document annotation with model-assisted labelling, and its newer agent products automate knowledge work over complex files. Customers span healthcare, life sciences, manufacturing and financial services.
meta.com · HQ: Menlo Park, United States · Foundation Models · Advertising · Virtual & Augmented Reality · Messaging Apps · Social Networks · 5000+ employees · Est. 2004 · Trust B · Hiring 1121, 86 new
HQ: Menlo Park, United States · Foundation Models · Advertising · Virtual & Augmented Reality · Messaging Apps · Social Networks · 5000+ employees · Est. 2004 · Trust B · Hiring 1121, 86 new
Meta Platforms is an American technology company founded in 2004 as Facebook and renamed in 2021 to signal its investment in immersive computing. It operates the largest family of social and messaging applications in the world, comprising Facebook, Instagram, WhatsApp, Messenger and Threads, and earns almost all of its revenue from advertising sold against that audience. Headquartered in Menlo Park, California, the company also develops the open Llama language models and the Reality Labs division behind Quest headsets and Ray-Ban smart glasses.
ifs.com · HQ: Linköping, Sweden · Manufacturing & Industrial Software · Field Service Management Software · ERP & Business Management Software · 5000+ employees · Est. 1983 · Trust B · Hiring 227, 13 new
HQ: Linköping, Sweden · Manufacturing & Industrial Software · Field Service Management Software · ERP & Business Management Software · 5000+ employees · Est. 1983 · Trust B · Hiring 227, 13 new
IFS is a Swedish enterprise software company founded in Linkoping in 1983 that sells applications for organisations whose value depends on physical assets and field work rather than office processes. Its Cloud product combines enterprise resource planning, asset management and field service management in one model, which suits aerospace and defence, energy and utilities, manufacturing, construction and telecommunications customers who plan maintenance, parts and technicians together. Headquartered in Linkoping and majority owned by the private equity firms EQT and Hg, it has pushed hard into industrial artificial intelligence.
goodnotes.com · HQ: Hong Kong · Consumer & Utility Software · Office & Productivity Software · 51-200 employees · Est. 2011 · Hiring 5
HQ: Hong Kong · Consumer & Utility Software · Office & Productivity Software · 51-200 employees · Est. 2011 · Hiring 5
GoodNotes is a popular note-taking app that is loved by students, digital planners, and notetakers all over the world. It is available for free download on the App Store. With GoodNotes, you can take notes, shape your ideas, and share them with ease using the world's best-loved digital paper. The app offers a range of features and benefits, including handwriting recognition and OCR technology, making your entire library of digital notes searchable. You can effortlessly write out equations, draw mind maps, mark up PDFs, and more. GoodNotes also allows you to organize your notes better with folders and subfolders, helping you stay organized in your studies or work. Plus, you can back up your notes to Google Drive, OneDrive, or Dropbox for added security. The app also offers automatic iCloud sync to ensure that the latest versions of your notes are always accessible across all your devices. Millions of students around the world choose GoodNotes for its reliability and versatility. Download GoodNotes today for free and experience the freedom and convenience of digital note-taking on your iPad, iPhone, or Mac.
cloudflare.com · HQ: San Francisco, United States · Cloud Security · DNS Services · Web Security & DDoS Protection · CDN & Edge Delivery · 1001-5000 employees · Est. 2009 · Trust B · Hiring 437, 37 new
HQ: San Francisco, United States · Cloud Security · DNS Services · Web Security & DDoS Protection · CDN & Edge Delivery · 1001-5000 employees · Est. 2009 · Trust B · Hiring 437, 37 new
Cloudflare is an American internet infrastructure company founded in 2009 that operates a global network sitting in front of a large share of the world's websites and applications. Traffic passing through it is cached, accelerated and filtered for attacks, and the same network now runs a zero trust access product for corporate applications, a serverless compute platform called Workers, object storage without egress fees, and a developer platform for databases, queues and artificial intelligence inference. Headquartered in San Francisco and listed on the New York Stock Exchange, it publishes widely read research on internet traffic patterns and attack trends.
cwan.com · HQ: Boise, United States · Accounting & Tax Software · Financial Software & Embedded Finance · Financial Data & Market Intelligence · 201-500 employees · Est. 2004 · Trust B · Hiring 192, 11 new
HQ: Boise, United States · Accounting & Tax Software · Financial Software & Embedded Finance · Financial Data & Market Intelligence · 201-500 employees · Est. 2004 · Trust B · Hiring 192, 11 new
Clearwater Analytics is a financial software company headquartered in Boise, Idaho, providing a cloud platform for investment accounting, reporting, reconciliation, risk and portfolio management to institutional investors. Founded in 2004, it serves insurers, asset managers, hedge funds, corporate treasuries, banks and governments, and expanded its front-office capabilities with the Enfusion and Beacon acquisitions in 2025. It hires software development engineers, quantitative developers, product managers, enterprise sales leaders, client servicing associates and service delivery managers in Boise, New York, Chicago, Edinburgh, London and Noida.
epicgames.com · HQ: Cary, United States · Developer Tools · PC Games · Game Development · 1001-5000 employees · Est. 1991 · Trust A · Hiring 108, 7 new
HQ: Cary, United States · Developer Tools · PC Games · Game Development · 1001-5000 employees · Est. 1991 · Trust A · Hiring 108, 7 new
Epic Games is an American video game and software company founded in 1991 that owns both Fortnite, one of the most played games in the world, and Unreal Engine, the real-time three-dimensional engine licensed to other studios and increasingly to film, architecture and automotive industries. It also operates the Epic Games Store, launched in 2018 with a lower commission than Steam, and it has pursued a long legal campaign against Apple and Google over app store fees. Headquartered in Cary, North Carolina and part-owned by Tencent, it is privately held and has acquired studios and tool companies including Psyonix, Quixel and 3Lateral.
methods.co.uk · HQ: London, United Kingdom · Cloud Consulting & Migration · Digital Government · IT Consulting & Digital Transformation · 5000+ employees · Est. 1990 · IT services · Trust A · Hiring 66, 4 new
HQ: London, United Kingdom · Cloud Consulting & Migration · Digital Government · IT Consulting & Digital Transformation · 5000+ employees · Est. 1990 · IT services · Trust A · Hiring 66, 4 new
Methods is a digital transformation consultancy headquartered in London, United Kingdom, and founded in 1990. The company designs and delivers user centred digital services, data platforms, cloud migrations, and cyber security work almost entirely for the United Kingdom public sector. It has been part of the French engineering group Alten since 2022 and holds places on major government procurement frameworks including G-Cloud and Digital Outcomes.
HQ: London, United Kingdom · Identity Management · Fraud Detection · 201-500 employees · Est. 2012 · Hiring 7
Callsign is a London company founded in 2012 that authenticates users through behavioural biometrics and device intelligence. Its models recognise how a person types, swipes and holds a phone to spot impersonation without adding friction. The company works with banks and telecom operators fighting authorised push payment fraud.
