Cybersecurity Engineer jobs in London hiring now at vetted startups and product companies on Alion, updated daily. Average salary around $180,557/year. Compare remote, hybrid and on-site positions with relocation and visa sponsorship. Browse and apply today.
klaviyo.com · HQ: Boston, United States · Customer Data Platforms (CDP) & Reverse ETL · Marketing Automation · Email Marketing · 1001-5000 employees · Est. 2012 · NYSE: KVYO · Trust B · Hiring 135, 12 new
HQ: Boston, United States · Customer Data Platforms (CDP) & Reverse ETL · Marketing Automation · Email Marketing · 1001-5000 employees · Est. 2012 · NYSE: KVYO · Trust B · Hiring 135, 12 new
Klaviyo is a software company that provides a marketing automation and customer data platform used by consumer brands for email, SMS, push notification and WhatsApp campaigns, customer service automation and analytics, headquartered in Boston, Massachusetts. Founded in 2012 by Andrew Bialecki and Ed Hallen, it listed on the New York Stock Exchange in 2023 and has offices across North America, Europe and the Asia-Pacific region, including London, Sydney and Singapore. Its openings are mostly for account executives and business development representatives, customer success managers, product and program managers, and software, AI and security engineers.
motorway.co.uk · HQ: London, United Kingdom · Marketplaces · 201-500 employees · Est. 2017 · Startup · Hiring 15, 2 new
HQ: London, United Kingdom · Marketplaces · 201-500 employees · Est. 2017 · Startup · Hiring 15, 2 new
Motorway is an online car-selling marketplace in the United Kingdom where private sellers list their vehicles and a network of more than 8,000 verified dealers bid on them in daily auctions. The service is free for sellers, with home collection and payment arranged through Motorway, while dealers pay fees to buy stock. The company was founded in 2017. The company is headquartered in London, England, United Kingdom.
dvtrading.co · HQ: Chicago, United States · Hedge Funds & Alternative Investments · 1001-5000 employees · Est. 2006 · Trust A · Hiring 72
HQ: Chicago, United States · Hedge Funds & Alternative Investments · 1001-5000 employees · Est. 2006 · Trust A · Hiring 72
DV Trading is a proprietary trading firm headquartered in Chicago that trades for its own account as a liquidity provider on derivatives and securities exchanges worldwide, using quantitative and discretionary strategies. Together with its DV Group affiliates it runs trading and technology teams in Chicago, New York, London, Toronto, Dubai, Miami, Houston and the Bahamas, and its equities business operates as DV Equities. It hires quantitative traders and researchers, software developers and trading operations analysts, including graduate and summer internship programs.
atkinsrealis.com · HQ: Montreal, Canada · Transport Infrastructure · Civil & Structural Engineering · Engineering Services · Nuclear Energy · 5000+ employees · Est. 1911 · Trust A · Hiring 1744, 81 new
HQ: Montreal, Canada · Transport Infrastructure · Civil & Structural Engineering · Engineering Services · Nuclear Energy · 5000+ employees · Est. 1911 · Trust A · Hiring 1744, 81 new
AtkinsRéalis is a Canadian professional services and project management company created when the engineering firm SNC-Lavalin, founded in Montreal in 1911, acquired the British consultancy Atkins in 2017 and adopted the combined name in 2023. It designs and manages infrastructure programmes across transport, water, buildings, energy and defence, and holds a substantial nuclear business through Candu Energy that services and builds heavy water reactors. Headquartered in Montreal and listed in Toronto, the group employs tens of thousands of engineers, planners and consultants across Canada, the United Kingdom, the Middle East and Asia Pacific.
vinted.com · HQ: Vilnius, Lithuania · Apparel & Fashion Brands · Marketplaces · 1001-5000 employees · Est. 2008 · Trust B · Hiring 170, 17 new
HQ: Vilnius, Lithuania · Apparel & Fashion Brands · Marketplaces · 1001-5000 employees · Est. 2008 · Trust B · Hiring 170, 17 new
Vinted is a Lithuanian technology company founded in 2008 and headquartered in Vilnius. Its marketplace lets people buy and sell second-hand clothing across Europe. The company became the first Lithuanian technology unicorn.
wpp.com · HQ: London, United Kingdom · Media & Audience Measurement · Digital Marketing · Creative Agencies · Advertising · 5000+ employees · Est. 1985 · Trust A · Hiring 199, 28 new
HQ: London, United Kingdom · Media & Audience Measurement · Digital Marketing · Creative Agencies · Advertising · 5000+ employees · Est. 1985 · Trust A · Hiring 199, 28 new
WPP is a British advertising and communications group assembled by Martin Sorrell from 1985 onwards, starting from a shell company that made wire shopping baskets and growing through relentless acquisition into the largest agency holding company in the world. It owns media buying through GroupM, creative networks including Ogilvy and VML, public relations firms such as Burson, and the consultancy AKQA, serving most of the world's largest advertisers. Headquartered in London and listed there, it has spent recent years consolidating dozens of agency brands into fewer, larger units while facing pressure from consultancies and from platforms selling directly to clients.
clearroute.io · London · Sofia · Pune · Bengaluru · IT Consulting & Digital Transformation · DevOps & Platform Engineering · 51-200 employees · Est. 2024 · Startup · Trust A · Hiring 20, 2 new
London · Sofia · Pune · Bengaluru · IT Consulting & Digital Transformation · DevOps & Platform Engineering · 51-200 employees · Est. 2024 · Startup · Trust A · Hiring 20, 2 new
REENGINEER YOUR ROUTE TO LIVE. ClearRoute is a global AI-native platform engineering consultancy that helps enterprises transform the Route to Live (RtL). To reliably bring high-impact digital products to market faster, cheaper, and safer.
WithSecure is a Finnish cybersecurity company headquartered in Helsinki and separated from F-Secure in 2022. It provides endpoint protection, cloud security and consulting to businesses. The company is listed on Nasdaq Helsinki.
ust.com · HQ: Aliso Viejo, United States · IT Outsourcing & Dedicated Teams · IT Consulting & Digital Transformation · 5000+ employees · Est. 1999 · IT services · Trust B · Hiring 757, 76 new
HQ: Aliso Viejo, United States · IT Outsourcing & Dedicated Teams · IT Consulting & Digital Transformation · 5000+ employees · Est. 1999 · IT services · Trust B · Hiring 757, 76 new
UST is an American IT services and digital transformation company headquartered in Aliso Viejo, California. Founded in 1999 by Stephen Ross as UST Global, it provides software engineering, cloud and infrastructure services, cybersecurity, data and AI, and business process services to large enterprises in healthcare, retail, banking and other industries. It employs about 30,000 people, with large delivery centres in Thiruvananthapuram, Kochi, Bengaluru, Chennai and Hyderabad.
deliveroo.com · HQ: London, United Kingdom · Online Groceries · Marketplaces · Delivery · 1001-5000 employees · Est. 2013 · Trust A · Hiring 188, 21 new
HQ: London, United Kingdom · Online Groceries · Marketplaces · Delivery · 1001-5000 employees · Est. 2013 · Trust A · Hiring 188, 21 new
Deliveroo is a British online food delivery company headquartered in London, connecting customers with restaurants, grocers and retailers through its app and a network of courier partners. Founded in 2013 by Will Shu and Greg Orlowski, it operates in the UK, Ireland, France, Italy, Belgium, the United Arab Emirates, Kuwait and other markets, and it has been owned by DoorDash since October 2025, alongside Wolt. It hires software and machine learning engineers, marketing and merchant teams, account managers, payroll and compensation specialists, and onboarding and partner support staff.
stripe.com · HQ: South San Francisco, United States · Payment Processing & Gateways · 1001-5000 employees · Est. 2010 · Trust B · Hiring 734, 67 new
HQ: South San Francisco, United States · Payment Processing & Gateways · 1001-5000 employees · Est. 2010 · Trust B · Hiring 734, 67 new
Stripe is a financial infrastructure company founded in 2010 by the Irish brothers Patrick and John Collison, dual-headquartered in South San Francisco and Dublin. Its APIs let businesses accept payments, run marketplaces, issue cards, manage subscriptions and handle tax and compliance without building banking integrations themselves, and it processes well over a trillion dollars of volume a year for customers ranging from startups to the largest technology companies. Beyond payments the company has expanded into treasury and issuing, revenue and finance automation, stablecoin infrastructure through its Bridge acquisition, and fraud prevention powered by its own machine learning models.
iceservices.com · HQ: Lincolnshire, United States · Custom Software Development · Financial Data & Market Intelligence · Est. 2016 · Hiring 2
HQ: Lincolnshire, United States · Custom Software Development · Financial Data & Market Intelligence · Est. 2016 · Hiring 2
ICE Services is the world's first integrated licensing and processing hub, offering support over 250,000 rights holders and multi-territory digital music companies.
nice.com · HQ: Ra'anana, Israel · AI Agents · Fraud Detection · RegTech, AML & Compliance · Contact Center Software · 5000+ employees · Est. 1986 · Trust A · Hiring 114, 5 new
HQ: Ra'anana, Israel · AI Agents · Fraud Detection · RegTech, AML & Compliance · Contact Center Software · 5000+ employees · Est. 1986 · Trust A · Hiring 114, 5 new
NICE is an Israeli software company founded in 1986 that sells customer engagement and financial crime software to large enterprises. Its CXone platform runs contact centre operations in the cloud, covering routing, workforce management, quality monitoring, conversational analytics and increasingly autonomous agents that handle interactions without a human, while a separate division supplies anti-money-laundering, fraud detection and trade surveillance systems to financial institutions. Headquartered in Ra'anana and listed on both Nasdaq and the Tel Aviv exchange, it holds a leading share of the cloud contact centre market.
aave.com · HQ: London, United Kingdom · Cryptocurrencies · DeFi · 11-50 employees · Est. 2017 · Startup · Trust B · Hiring 13, 2 new
HQ: London, United Kingdom · Cryptocurrencies · DeFi · 11-50 employees · Est. 2017 · Startup · Trust B · Hiring 13, 2 new
Aave is a decentralised lending protocol, developed by the London-based company Avara, that lets users supply crypto assets to earn yield and borrow against them without an intermediary. Started in 2017 as the peer-to-peer lender ETHLend and relaunched under its current name in 2018, the protocol pioneered variable and stable interest rate markets, flash loans and cross-chain liquidity pools. Governance sits with holders of the AAVE token, and the wider Avara portfolio now also includes the GHO stablecoin, the Lens social protocol and consumer wallet products.
riverisland.com · HQ: London, United Kingdom · Apparel & Fashion Brands · 201-500 employees · Est. 1948 · Trust A · Hiring 62, 14 new
HQ: London, United Kingdom · Apparel & Fashion Brands · 201-500 employees · Est. 1948 · Trust A · Hiring 62, 14 new
River Island is a British high street fashion retailer headquartered at Chelsea House in west London, selling womenswear, menswear, childrenswear, footwear and accessories through its stores, website and app. Founded in 1948 by Bernard Lewis and trading as River Island since 1988, the family-owned company runs stores across the UK and Ireland and sells internationally through online delivery and wholesale and franchise partners. It hires store sales advisors, team leaders and managers, product and commercial managers, merchandisers and buyers, finance and fraud analysts, graphic designers and technology staff such as test engineers and security specialists.
alcumus.com · HQ: Cardiff, United Kingdom · Management Consulting · Testing, Inspection & Certification · 51-200 employees · Trust A · Hiring 67, 2 new
HQ: Cardiff, United Kingdom · Management Consulting · Testing, Inspection & Certification · 51-200 employees · Trust A · Hiring 67, 2 new
Alcumus is a UK-founded risk management and compliance group whose brands cover contractor pre-qualification, health and safety accreditation, ISO certification through ISOQAR and advisory services, with its supply chain business registered in Cardiff. Its SafeContractor and CHAS schemes, the latter originally founded by Merton Council and giving clients access to over 30,000 compliant contractors, now operate alongside Veriforce under Veriforce Holdings in the UK, Canada and the US. Hiring covers SSIP and health and safety assessors, lead auditors, sales development and account executives, customer success, HR consultants, DevOps, test and data roles.
bullish.com · HQ: New York, United States · Financial News & Media · Crypto Exchanges · 201-500 employees · Est. 2020 · NYSE: BLSH · Hiring 19
HQ: New York, United States · Financial News & Media · Crypto Exchanges · 201-500 employees · Est. 2020 · NYSE: BLSH · Hiring 19
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.
kainos.com · HQ: Belfast, United Kingdom · Custom Software Development · IT Consulting & Digital Transformation · 1001-5000 employees · Est. 1986 · IT services · Trust B · Hiring 82, 9 new
HQ: Belfast, United Kingdom · Custom Software Development · IT Consulting & Digital Transformation · 1001-5000 employees · Est. 1986 · IT services · Trust B · Hiring 82, 9 new
Kainos is a Belfast technology company founded in 1986 that delivers digital services and Workday implementations. It has built many of the digital services used by British government departments and health bodies. The company also develops the Smart Test automation product for Workday customers worldwide.
hiya.com · HQ: Seattle, United States · Cybersecurity AI · Fraud Detection · 5000+ employees · Est. 2016 · Trust A · Hiring 26
HQ: Seattle, United States · Cybersecurity AI · Fraud Detection · 5000+ employees · Est. 2016 · Trust A · Hiring 26
Hiya is a voice security company that provides caller ID, spam and fraud call blocking and branded calling services. Its products are used by mobile operators, phone makers and businesses, and its consumer app identifies and filters unwanted calls, including AI deepfake voice scams. Founded in 2016 as a spin-off of Whitepages, the company is headquartered in Seattle, Washington, United States.
enginebystarling.com · London · Sydney · New York · Financial Software & Embedded Finance · Digital Banks & Neobanks · Financial Services · Est. 2016 · Hiring 16, 1 new
London · Sydney · New York · Financial Software & Embedded Finance · Digital Banks & Neobanks · Financial Services · Est. 2016 · Hiring 16, 1 new
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