{"id":3228233,"url":"https://alion.io/job/tesonet-senior-vpn-software-engineer","title":"Senior VPN Software Engineer","company":{"id":56358,"name":"Tesonet","domain":"tesonet.com","url":"https://alion.io/company/tesonet","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Vilnius, Lithuania"],"countries":["LT"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":4750,"max":7000,"currency":"EUR","period":"month","gross":true,"usd_annual":94116},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Ansible","optional":false},{"name":"CI/CD","optional":false},{"name":"Debian","optional":false},{"name":"eBPF","optional":false},{"name":"HAProxy","optional":false},{"name":"Linux","optional":false},{"name":"VPN","optional":false}],"status":"closed","first_seen_at":"2026-10-22T01:41:20Z","employer_posted_date":null,"last_verified_at":"2026-10-26T13:02:20Z","board_verified":false,"closed_at":"2026-10-26T13:02:20Z","days_open":4,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":4},"description":"Job Description\nJoin Surfshark's VPN Engineering team to build and scale the core software powering our global infrastructure. You will own key stack components, optimize high-performance tools like WireGuard and HAProxy, and work with SRE to maintain a fast, secure fleet of thousands of servers. This role offers deep technical ownership, from kernel tuning and eBPF programming to architecting low-latency protocol extensions.\n\nDesign and scale our proprietary VPN software (SDN, Dausos, WCB) and extend tools like WireGuard and HAProxy;\n\nDig into the Linux networking stack, debug it, and tune it for high-scale traffic while maintaining custom Debian images;\n\nWrite eBPF programs for packet processing and architect systems for ultra-low latency and high throughput;\n\nLead R&D on custom protocol extensions and optimizations, drive large-scale refactoring, and set the coding standards others follow;\n\nWork with SRE team to automate a global fleet through Ansible deployments and custom CI/CD pipelines.\n\nRequirements\n\nProven experience tracing complex production issues across code, OS, and service boundaries;\n\nProven experience architecting solutions that hold up across thousands of servers;\n\nProgramming skills in Go and/or C;\n\nHands-on work with Ansible and a solid grasp of scalable deployment architectures.\n\nCompany offers\n\nGrowth and learning opportunities: time dedicated to learning, conferences, online learning platforms, and books for your professional development;\n\nHealth and wellness: we want you to feel and be your best. That's why we offer various benefits, from online workouts, a physical coach and a gym to regular mental health checks;\n\nTools of your choice: choose technical equipment and the tools you need to do your best;\n\nCommunity and celebrations: get ready for long-lasting traditions such as yearly workation, Friday get-togethers, various team buildings and company celebrations;\n\nConvenient commuting: traveling from point A to point B can be a pain. That’s why, depending on your unique circumstances, we compensate part of your public transport costs;\n\nWork-life balance: We encourage working in the office, with the possibility of up to two remote days per week. Plus, with our WFA policy, you can work from almost anywhere in the world;\n\nPremium Surfshark accounts: for you, your family, and friends;","description_format":"text","description_chars":2345,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Professional development"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Custom Software Development","Angel Networks & Startup Accelerators"],"lifecycle":[{"event":"open","at":"2026-10-25T06:51:55Z"},{"event":"close","at":"2026-10-26T13:02:20Z"}],"visa":[],"liveness":null,"pay":{"stated_usd_annual":94116,"is_top_pay":false},"html_url":"https://alion.io/job/tesonet-senior-vpn-software-engineer","json_url":"https://alion.io/job/tesonet-senior-vpn-software-engineer.json","meta":{"generated_at":"2026-10-26T17:24:20Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":23310,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-27T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":56358},"rest":"https://alion.io/mcp/rest/get_company?id=56358"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Ftesonet-senior-vpn-software-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Ftesonet-senior-vpn-software-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Ftesonet-senior-vpn-software-engineer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/tesonet-senior-vpn-software-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Ftesonet-senior-vpn-software-engineer"}]}