{"id":1308402,"url":"https://alion.io/job/cysec-lead-rust-developer","title":"Lead Rust Developer","company":{"id":2154309,"name":"CYSEC","domain":"cysec.com","url":"https://alion.io/company/cysec-com","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"BambooHR","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"lead","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":["Toulouse, France"],"countries":["FR"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":56000,"max_usd":105000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":14},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"Linux","optional":false},{"name":"Rust","optional":false},{"name":"TCP/IP","optional":false},{"name":"VPN","optional":false},{"name":"Ansible","optional":true},{"name":"CI/CD","optional":true},{"name":"GitLab CI","optional":true},{"name":"Terraform","optional":true}],"status":"live","first_seen_at":"2026-04-16T00:00:00Z","employer_posted_date":"2026-04-16","last_verified_at":"2026-09-30T15:55:21Z","board_verified":true,"closed_at":null,"days_open":168,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":167},"description":"Office: Toulouse or Paris (remote work possible)\nLength: Full time contract\nStart date: ASAP\nWho are we ?\nWe are CYSEC, a fast-growing European information security company based in Luxembourg, Switzerland, and France.\nWe bring security solutions to protect sensitive information and datalinks, on Earth and in Space. We develop and offer three different innovative products securing:\nARCA SATLINK-The space data link between the Ground Station and the Satellite\nARCA SATCOM -The satcom link providing internet connectivity to end users through satellites\nARCA Trusted OS -IT execution environments on untrusted or third party infrastructures\nWe’re a team of engineers and software security experts, combining deep technical expertise with hands-on industry experience. Our mission is to deliver agile, cutting-edge security solutions tailored for even the most exotic infrastructures and we're always ready to tackle the toughest challenges. As a proud multinational and multilingual team, we believe that true innovation and excellence are driven by diversity and inclusion. Join us in shaping the future of cybersecurity.\nFind out more at: www.cysec.com\n\nYour Mission\nAs a Senior Rust Developer, you will design and build high-performance software for our satellite VPN platform, from low-level protocol architecture to production deployment.\nYou will play a key role in optimizing network performance over real satellite links, ensuring robustness, efficiency, and security across all layers of the system. Working closely with security experts, product teams, and pre-sales, you will contribute to continuously improving ARCA SATCOM and supporting next-generation satellite communication systems.\nKey Responsibilities\nDesign and develop high-performance systems in Rust (protocol design to production)\nOptimize network performance (throughput, stability, resilience) over satellite links\nCollaborate with cybersecurity experts to ensure strong cryptographic and security standards\nDrive architectural improvements and contribute to product evolution\nWork closely with product and pre-sales teams to align technical capabilities with user needs\nSupport integration and deployment of satellite communication systems\nWhat We’re Looking For:\nTo strengthen the engineering and innovation teams and to support the growth of the company, we are looking for a Senior Satcom/Network Developer to contribute to CYSEC’s effort in driving cybersecurity innovation for satellite communication\nEducation:\nDegree in Computer Science, Electrical Engineering, or equivalent hands-on experience\nCore profile:\nExpert-level Rust (systems programming, async with Tokio, software architecture)\nStrong Linux knowledge (kernel, networking stack, TCP/IP, UDP, Netfilter)\nAdvanced networking expertise (congestion control, QoS, routing, VPN, QUIC, bufferbloat)\nFluent French and professional English\nNice to have:\nExperience with satellite communications (link budgets, modulation)\nKnowledge of cryptography and secure protocols (TLS, IPSec)\nContributions to open-source Rust projects\nDevOps experience (Ansible, Terraform, GitLab CI/CD)\nMindset\nProactive and ownership-driven\nStrong critical thinking and problem-solving skills\nCollaborative and team-oriented\nWhy This Role Matters\nARCA SATCOM is CYSEC’s flagship satellite communication product, combining end-to-end TLS 1.3 encryption with Split-TCP optimization to boost throughput by up to 250% over LEO and GEO satellite links. Already deployed across Europe, the Middle East, and Africa, it supports critical communications for defense, government, and commercial networks.\nIn this context, your role is key to ensuring the performance, reliability, and security of these deployments. You will directly contribute to solving real-world challenges in satellite connectivity, improving how secure communications operate in constrained and high-latency environments, and enabling CYSEC’s technology to scale across global infrastructures","description_format":"text","description_chars":3970,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[{"language":"French","level":"Advanced (C1)","optional":false}]},"benefits":[],"hiring_locations":[{"name":"France","iso":"FR","kind":"country"},{"name":"Switzerland","iso":"CH","kind":"country"},{"name":"Luxembourg","iso":"LU","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Cybersecurity","Satellite Communications","Information Security"],"lifecycle":[{"event":"open","at":"2026-09-26T15:02:38Z"}],"liveness":{"score":8,"band":"cold","label":"Long shot","p_open":1,"p_active":0.298,"p_room":0.28,"age_days":167,"expected_fill_days":23,"reasons":["conf:12","urgency","win:tail","crowd:"],"computed_at":"2026-09-30T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/cysec-lead-rust-developer","json_url":"https://alion.io/job/cysec-lead-rust-developer.json","meta":{"generated_at":"2026-10-01T04:26:58Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","usage":{"tier":"crawler","counted_by":"address","units_charged":1,"used_today":3770,"day_limit":5000,"remaining_today":1230,"minute_limit":60,"resets_at":"2026-10-02T00:00:00Z"}}}