{"id":594285,"url":"https://alion.io/job/janestreet-dev-network-engineer-security","title":"Network Engineer, Security","company":{"id":7349,"name":"Jane Street","domain":"janestreet.com","url":"https://alion.io/company/jane-street","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":75,"open_postings":169,"ghost_share":0.331,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":147,"computed_at":"2026-10-26T05:57:25Z"}},"role":"Networking","role_family":"Networking","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Singapore"],"countries":["SG"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":49000,"max_usd":100000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":14},"experience_years_min":7,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"BGP","optional":false},{"name":"OSPF","optional":false}],"status":"live","first_seen_at":"2026-03-30T02:04:50Z","employer_posted_date":"2026-10-19","last_verified_at":"2026-10-26T06:22:36Z","board_verified":true,"closed_at":null,"days_open":210,"trust":{"level":"ok","repost_count":0,"flags":["company_stale"],"days_open":210},"description":"About the Position\nWe are looking for an experienced Network Engineer to join our Network Security team to help us run, scale, and continuously improve our network security infrastructure through hands-on operations, design, and implementation. The ideal candidate will have strong networking fundamentals and experience with security appliances such as firewalls and proxy.\nJane Street’s numerous distributed systems are built on an agile, reliable, multi-vendor network infrastructure that supports all traffic profiles, from trading to internet connectivity. Supporting such a large multi-function network requires advanced tooling for monitoring and automation. \nStrong communication and interpersonal skills will be needed to collaborate with colleagues across the firm globally. You will find and resolve issues, plan and execute deployments, and improve systems where possible. We’ll also look to leverage your advanced networking skills and security knowledge to: \nWork closely with our Network Engineering team on the design and deployment of security perimeter and adjacent network infrastructure\nManage and continuously evolve network segmentation, DMZ, and other aspects of network security\nEvaluate and lab test new platforms for our network security infrastructure\nCollaborate with our Cybersecurity team on the detection and mitigation of threats and vulnerabilities on our network\nInterface with application owners and traders to enable business workflows securely\nProactively enhance support by improving network infrastructure observability and scripting, and communicating requirements to our software engineers\nImprove our network security processes and documentation\nA holistic approach to system design is critical for this role. Our broader Networking team prioritizes flexibility, compatibility, and efficiency when crafting solutions, all while seeking ongoing buy-in and feedback from users across the firm. Our firm’s culture prizes intellectual humility, openness, and continuous improvement, which translates directly to the daily work of this team. We’re all partners working toward shared goals and are always looking for the next best idea that will make our work stronger. \nYour strong communication skills and analytical thinking will be invaluable as we support the daily work of our colleagues and keep our systems operating at the highest standard.\nAbout You\nHave 7+ years of experience operating and deploying network infrastructure\nExperienced with routing and network protocols (OSPF, BGP, PIM-SM)\nExperienced with troubleshooting transport protocols (TCP/UDP)\nHave a strong understanding of firewall hardware architecture, performance metrics, and functional components\nExperienced with firewall configuration and troubleshooting\nUnderstand Public Key Infrastructure and related technologies\nUnderstand modern encryption techniques\nHave a high capacity to learn; we are interested in how you think, not just what you know\nAble to context-switch, while still being able to prioritize and organize your stack \nIdeally have experience with overlay networks (EVPN, VxLAN)\nA flexible and reliable team player who enjoys working in a collaborative environment\nPreferably have proficiency in a programming language\nFluency in English required\nIf you're a recruiting agency and want to partner with us, please reach out to .","description_format":"text","description_chars":3391,"description_truncated":false,"requirements":{"experience_years_min":7,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"English","level":"Advanced (C1)","optional":false}]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Hedge Funds & Alternative Investments"],"lifecycle":[{"event":"open","at":"2026-09-10T14:59:02Z"}],"visa":[],"liveness":{"score":33,"band":"fade","label":"Fading","p_open":1,"p_active":0.746,"p_room":0.44,"age_days":210,"expected_fill_days":147,"reasons":["conf:3","velocity","win:tail","crowd:brand"],"computed_at":"2026-10-26T05:57:25Z"},"pay":null,"html_url":"https://alion.io/job/janestreet-dev-network-engineer-security","json_url":"https://alion.io/job/janestreet-dev-network-engineer-security.json","meta":{"generated_at":"2026-10-26T08:11:32Z","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":10884,"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":7349},"rest":"https://alion.io/mcp/rest/get_company?id=7349"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fjanestreet-dev-network-engineer-security"},{"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%2Fjanestreet-dev-network-engineer-security"},{"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%2Fjanestreet-dev-network-engineer-security"},{"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/janestreet-dev-network-engineer-security\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fjanestreet-dev-network-engineer-security"}]}