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: London, United Kingdom · Data Integration & ETL Tools · Intranet & Knowledge Management · Knowledge Graphs · 51-200 employees · Startup · Trust A · Hiring 14
HASH is a software company that develops an open-source workspace for structured knowledge, where teams integrate live data from external sources, define shared types and ontologies, and build a knowledge graph of entities they can query and edit together. It also offers AI agents that extract structured information into the graph. The company is headquartered in London, England, United Kingdom.
try.be · HQ: London, United Kingdom · Scheduling & Booking Software · Est. 2020 · Startup · Hiring 2, 1 new
HQ: London, United Kingdom · Scheduling & Booking Software · Est. 2020 · Startup · Hiring 2, 1 new
TRYBE is the best operational and online booking system for spa, leisure, and activities. A slick booking system that automates bookings and boosts revenue.
Proton VPN is a high-security virtual private network service operated by Proton AG, a privacy-focused software firm headquartered in Geneva, Switzerland. Originally developed in 2017 by scientists and engineers who met at CERN (and who built Proton Mail), the service provides end-to-end encrypted internet routing backed by strict Swiss data protection laws.
abtrace.com · HQ: London, United Kingdom · Machine Learning · Care Coordination & Population Health · 51-200 employees · Startup · Trust C · Hiring 12
HQ: London, United Kingdom · Machine Learning · Care Coordination & Population Health · 51-200 employees · Startup · Trust C · Hiring 12
Abtrace is a health tech company based in London, with a team of doctors, researchers, developers and data scientists that bring together software engineering, machine learning expertise and medical experience to build clinical algorithms to support primary care clinicians. The team is dedicated to creating digital health software to deliver Population Health interventions individualized to patients. This involves the continuous scanning of the entire health record of a patient to detect signals of deterioration, early onset of new disease and opportunities for preventative interventions.
margo.com · HQ: Courbevoie, France · IT Staffing & Staff Augmentation · IT Consulting & Digital Transformation · 11-50 employees · Est. 2005 · Staffing · EOR · Trust A · Hiring 47, 3 new
HQ: Courbevoie, France · IT Staffing & Staff Augmentation · IT Consulting & Digital Transformation · 11-50 employees · Est. 2005 · Staffing · EOR · Trust A · Hiring 47, 3 new
Margo is a Paris-based technology engineering and AI consulting group that provides specialist consultants in data, cloud, software engineering and capital markets technology, mainly to banks, insurers and industrial clients. Founded in 2005, it has about 450 staff across Paris, London and an engineering center in Warsaw, reported turnover of 45 million euros in 2025 and runs practices such as Capital Market Technologies, Cloud Transformation and Software Engineering. It hires C#, Java and Python developers, front-office support engineers, quant developers, business analysts, data and DevOps engineers and business developers.
catonetworks.com · HQ: Tel Aviv, Israel · Network Security · Cloud Security · 501-1000 employees · Est. 2015 · Trust A · Hiring 104, 16 new
HQ: Tel Aviv, Israel · Network Security · Cloud Security · 501-1000 employees · Est. 2015 · Trust A · Hiring 104, 16 new
Cato Networks is an Israeli cybersecurity company, founded in 2015, that provides a cloud-native secure access service edge (SASE) platform. Its global private backbone combines SD-WAN networking with security services such as firewall as a service, secure web gateway, zero trust network access, cloud access security broker and data loss prevention, sold to enterprises largely through channel partners. The company is headquartered in Tel Aviv, Israel.
first.cx · New York · London · Tokyo · Software · Professional Services · Recruiting Software & ATS · 201-500 employees · Likely startup · Trust B · Hiring 9
New York · London · Tokyo · Software · Professional Services · Recruiting Software & ATS · 201-500 employees · Likely startup · Trust B · Hiring 9
First.cx is the AI hiring platform for industry-leading teams. Intelligent candidate screening, fair assessment, and a first-class candidate experience. Deploy in minutes.
boltz.com · HQ: London, United Kingdom · Drug Discovery AI · Drug Discovery · 201-500 employees · Est. 2024 · Startup · Trust D · Hiring 13
HQ: London, United Kingdom · Drug Discovery AI · Drug Discovery · 201-500 employees · Est. 2024 · Startup · Trust D · Hiring 13
Boltz is a public benefit company building AI-powered molecular modeling tools to make biology programmable and accelerate drug discovery. Its open models Boltz-1, Boltz-2 and BoltzGen are used by more than 100,000 scientists across biotech and academia. The company is headquartered in London, United Kingdom.
csdisco.com · HQ: Austin, United States · Legal Software · Legal AI · 201-500 employees · Est. 2013 · Trust B · Hiring 36, 5 new
HQ: Austin, United States · Legal Software · Legal AI · 201-500 employees · Est. 2013 · Trust B · Hiring 36, 5 new
DISCO is an American legal technology company founded in 2013 that provides cloud software for ediscovery, document review and case management to law firms, corporate legal departments and government agencies. Its platform uses AI to process, search and review large volumes of litigation data, and it also offers managed review services. The company is listed on the New York Stock Exchange and is headquartered in Austin, Texas, United States.
incard.com · HQ: London, United Kingdom · Supply Chain · Mobile Games · Commerce · Cards & Card Issuing · Digital Banks & Neobanks · 51-200 employees · Est. 2020 · Startup · Trust D · Hiring 13
HQ: London, United Kingdom · Supply Chain · Mobile Games · Commerce · Cards & Card Issuing · Digital Banks & Neobanks · 51-200 employees · Est. 2020 · Startup · Trust D · Hiring 13
Banking, cards, cashflow, capital and treasury with cashback on every pound you spend running the business. Built for ecommerce, AI companies, agencies and creators.
fogsphere.com · HQ: London, United Kingdom · Occupational Health · 51-200 employees · Est. 2021 · Likely startup · Trust B · Hiring 8
HQ: London, United Kingdom · Occupational Health · 51-200 employees · Est. 2021 · Likely startup · Trust B · Hiring 8
Fogsphere is a Workplace Safety monitoring platform meant to reduce the risks exposure of your workers through active monitoring of workplace and behaviours.
neviswealth.com · HQ: New York, United States · Financial AI · Wealth Management & Financial Advisors · Startup · Trust D · Hiring 21
HQ: New York, United States · Financial AI · Wealth Management & Financial Advisors · Startup · Trust D · Hiring 21
Nevis is building an AI wealth management platform that helps financial advisors grow and spend more time with clients. The company says its platform has over 50 billion dollars of assets under management and has raised 40 million dollars from Sequoia Capital, ICONIQ and Ribbit. The company is headquartered in New York, United States.
updraft.com · HQ: London, United Kingdom · Personal Finance Apps & Education · Consumer Loans & Pawnshops · 1-10 employees · Est. 2018 · Startup · Trust B · Hiring 4
HQ: London, United Kingdom · Personal Finance Apps & Education · Consumer Loans & Pawnshops · 1-10 employees · Est. 2018 · Startup · Trust B · Hiring 4
Updraft is a London financial technology company founded in 2018 that helps people clear expensive credit card and overdraft debt. Its app reads spending through open banking and refinances balances at lower rates while coaching users out of revolving credit. The company lends directly and operates across the United Kingdom.
reflexivity.com · New York · London · Financial Data & Market Intelligence · 51-200 employees · Trust B · Hiring 9
New York · London · Financial Data & Market Intelligence · 51-200 employees · Trust B · Hiring 9
Designed for institutional investors, Reflexivity combines trusted data from S&P Global, LSEG Datastream, Cboe, Nasdaq, and more with explainable AI to surface insights - not noise.
intercom.com · HQ: San Francisco, United States · AI Agents · Conversational AI · Customer Support & Help Desk Software · Est. 2011 · Trust A · Hiring 116, 11 new
HQ: San Francisco, United States · AI Agents · Conversational AI · Customer Support & Help Desk Software · Est. 2011 · Trust A · Hiring 116, 11 new
Intercom is a customer service software company founded in Dublin in 2011 that began as a messenger embedded in web products and has rebuilt itself around artificial intelligence support agents. Its Fin agent resolves customer questions autonomously from a company's own help content and is priced per resolution rather than per seat, which is an unusual model for the category, and it sits alongside a help desk, knowledge base and proactive messaging tools for human teams. Headquartered in San Francisco with a large engineering presence in Dublin, the company is privately held and competes with Zendesk, Salesforce and the newer artificial intelligence support vendors.
wiz.io · HQ: New York, United States · Security Operations · Cloud Security · Cybersecurity AI · Information Security · 1001-5000 employees · Est. 2020 · Trust B · Hiring 103, 6 new
HQ: New York, United States · Security Operations · Cloud Security · Cybersecurity AI · Information Security · 1001-5000 employees · Est. 2020 · Trust B · Hiring 103, 6 new
Wiz is a cloud security company founded in 2020 by four Israeli engineers who had previously built and sold Adallom to Microsoft, and it grew faster to a hundred million dollars of recurring revenue than any software company before it. Its platform connects to a customer's cloud accounts without agents, builds a graph of every resource, identity and permission, and surfaces the small number of attack paths that actually combine into a serious risk rather than producing thousands of unranked alerts. Headquartered in New York with research in Tel Aviv, the company agreed in 2025 to be acquired by Google for around thirty-two billion dollars, the largest deal in Google's history.
nominal.io · HQ: Los Angeles, United States · Manufacturing & Industrial Software · 501-1000 employees · Est. 2023 · Startup · Trust A · Hiring 39, 2 new
HQ: Los Angeles, United States · Manufacturing & Industrial Software · 501-1000 employees · Est. 2023 · Startup · Trust A · Hiring 39, 2 new
Nominal builds a connected test and operations platform for hardware engineering teams, ingesting test and telemetry data, analyzing performance and automating test execution. It serves aerospace, defense and robotics teams, from spacecraft to autonomous vehicles, and hires forward deployed, product and mission operations engineers. The company is headquartered in Los Angeles, California, United States.
