{"id":2702991,"url":"https://alion.io/job/flowdesk-network-cloud-infrastructure-security-engineer","title":"Network & Cloud Infrastructure Security Engineer","company":{"id":53133,"name":"Flowdesk","domain":"flowdesk.co","url":"https://alion.io/company/flowdesk","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":null},"role":"Security","role_family":"Security","seniority":null,"employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["London, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":67000,"max_usd":151000,"period":"year","method":"role_country_seniority_unknown","sample_n":140},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"DNS","optional":false},{"name":"Kubernetes","optional":false},{"name":"Service Mesh","optional":false},{"name":"Terraform","optional":false},{"name":"Zero Trust","optional":false}],"status":"live","first_seen_at":"2026-10-16T09:10:32Z","employer_posted_date":"2026-10-16","last_verified_at":"2026-10-16T20:23:32Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"About Flowdesk\nAt Flowdesk, we are building the infrastructure powering the next era of global finance. As a full-service digital asset trading and technology firm, we provide liquidity solutions, OTC trading, and market infrastructure that connect digital assets to global markets with institutional-grade precision, transparency, and scale. Flowdesk combines expertise from traditional finance, algorithmic trading, and blockchain technology to deliver always-on trading capabilities across the digital asset ecosystem.\nFounded in 2020, we have grown into a global team supporting institutions, exchanges, and token issuers worldwide as the financial system evolves toward tokenized markets.\nWhy join Flowdesk? You’ll be joining a company operating at the intersection of finance, technology, and crypto - solving complex market problems, building critical infrastructure, and helping shape how digital assets move globally. We move fast, think long term, and work with a strong ownership mindset across engineering, trading, product, operations, and business teams.\nRole Description\nFlowdesk runs regulated crypto trading and custody on cloud infrastructure across several jurisdictions. The Security team keeps that infrastructure and the networks around it tightly controlled, segmented and provable to auditors and regulators.\nIn this role you will own cloud and network security design and the day-to-day operation of our infrastructure controls. You will also review architecture for new systems before they go live.\nYou will work as part of the wider security team, alongside engineering teams and SecOps, so that security is part of the design from the start.\nKey Responsibilities\nDesign, run and tune cloud-native, virtual and on-premises firewalls, including rule hygiene and change review\nRun security architecture reviews for new services, integrations and offices, and write up findings with clear, prioritised fixes\nPlan network segmentation across cloud and office environments, so sensitive systems are isolated from everything else\nReview cloud infrastructure architecture and help design and support a best practice secure cloud infrastructure\nOwn our SASE and zero-trust access approach\nManage the security of network devices, including configuration baselines, patching, access, lifecycle and routing protocols\nBuild and change network security controls through Terraform and infrastructure as code, using the same review and approval process as our engineering teams\nWork across security and engineering teams on network changes, so security is part of the design and not added afterwards\nMonitor network telemetry with SecOps, and help investigate and contain incidents\nProduce evidence for audits and regulators, and help close findings from pentests and cloud posture management reviews\nSet standards and reference architectures for network controls, and keep them current\nWork as part of the wider security team, and cover gaps in other areas when they arise, such as during absences, incidents or peaks in workload\nRequirements\nMust Have\nSeveral years in network or cloud security engineering, with hands-on production experience\nWorking knowledge of both cloud and on-premises networks: private networks, routing, peering, private connectivity, DNS, low latency networks, load balancing, egress control, switching and wireless\nExperience managing network devices securely\nHands-on experience with cloud and next-generation firewalls, and with SASE or ZTNA platforms\nSolid understanding of Terraform and infrastructure as code, and the ability to work day to day in an environment where infrastructure is managed that way\nScripting skills (required for the role)\nGeneral security knowledge across the main domains, including mTLS, IPsec, WireGuard, SSL inspection, IDPS, and network monitoring and detection\nA process-oriented approach: you document what you do, follow change control, and leave an audit trail\nExperience reviewing architectures and explaining risk to engineers and non-technical stakeholders\nWillingness to work across the security team and learn adjacent areas, such as incident response, GRC evidence or cloud security, as needed\nPreferred\nHighly desired\nExperience working in a regulated, controlled environment, such as financial services or crypto\nHelpful\nContainer and Kubernetes network policy and service mesh experience\nRelevant security or cloud networking certifications\nPerson Profile\nSecurity-by-design mindset: engages early in network and architecture changes rather than reviewing at the end\nClear communicator, able to explain risk to engineers and non-technical stakeholders\nProcess-oriented: documents decisions, follows change control and leaves a clear audit trail\nAutomation-minded: prefers infrastructure as code and scripting over manual change\nComfortable working across the security team and stepping in on adjacent areas when needed\nCompany Culture & Values\nTake Action & Own the Mission\nBe of Service & Contribute\nInnovate, Create Value, & Be Courageous\nAct with Integrity & Respect\nBenefits\nInternational environment (English is the main language)\n100% health coverage\nTeam events and offsites\nCompany Pension scheme\nLearning and Development 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