{"id":79643,"url":"https://alion.io/job/roblox-principal-software-engineer-game-engine-systems-c","title":"Senior Software Engineer - Game Engine Systems (C++)","company":{"id":246,"name":"Roblox Corporation","domain":"roblox.com","url":"https://alion.io/company/roblox","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":74,"open_postings":35,"ghost_share":0,"stale_share":0.857,"repost_share":0,"time_to_fill_p50_days":68,"computed_at":"2026-10-19T05:45:15Z"}},"role":"Games","role_family":"Games","seniority":"senior","employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["San Mateo, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":243290,"max":295250,"currency":"USD","period":"year","gross":null,"usd_annual":295250},"salary_estimate":null,"experience_years_min":4,"visa_sponsorship":true,"relocation_package":false,"has_equity":true,"technologies":[{"name":"C++","optional":false},{"name":"Linux","optional":false}],"status":"live","first_seen_at":"2025-12-08T17:33:03Z","employer_posted_date":"2026-10-12","last_verified_at":"2026-10-19T06:22:44Z","board_verified":true,"closed_at":null,"days_open":314,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":314},"description":"Every day, tens of millions of people come to Roblox to explore, create, play, learn, and connect with friends in 3D immersive digital experiences- all created by our global community of developers and creators. \nAt Roblox, we’re building the tools and platform that empower our community to bring any experience that they can imagine to life. Our vision is to reimagine the way people come together, from anywhere in the world, and on any device. We’re on a mission to connect a billion people with optimism and civility, and looking for amazing talent to help us get there. \nA career at Roblox means you’ll be working to shape the future of human interaction, solving unique technical challenges at scale, and helping to create safer, more civil shared experiences for everyone.\nTheEngine Networking Team pulls the players together by ensuring the communication of the game state to all. As a Senior Network Transport Engineer you will help the players experience the game as a nearly synchronous world. Just as the nerves in our bodies coordinate our actions, the network system coordinates all the computers involved into a smooth experience for the players. You will work in all areas of the game platform in your quest for real-time communication of every part of Roblox.\nYou Have:\nWorked on a powerful user-space network stack, solving problems related to scale, performance, latency, and throughput in client/server environments.\nWorked on a very large multithreaded distributed system that connects millions of users worldwide.\nWorked on all the devices Roblox supports - from desktop clients to mobile phone clients to console clients\nWorked on a game engine and understand how a game engine works\nYou Are:\nA software engineer with 7+ years of experience with Game networking coming from a Game Engine/Studio\nA deep understanding of Network Stack with a passion for working with open source\nStrong systems-level C++ programming experience and fascinated by the actual work the CPU does when you use smart pointers, templates, virtual functions, and blocks of memory, both structured and raw\nExperience with Linux networking, QoS, Congestion Control Algorithms.\nKeen to each millisecond of the network exchanges: You know where the time goes and how to reduce the waste\nUnderstanding of what happens on the operating systems level when certain code is completed\nFor roles that are based at our headquarters in San Mateo, CA: The starting base pay for this position is as shown below. The actual base pay is dependent upon a variety of job-related factors such as professional background, training, work experience, location, business needs and market demand. Therefore, in some circumstances, the actual salary could fall outside of this expected range. This pay range is subject to change and may be modified in the future. All full-time employees are also eligible for equity compensation and for benefits as described on this page.\nAnnual Salary Range\n$243,290—$295,250 USD\nRoles that are based in an office are onsite Tuesday, Wednesday, and Thursday, with optional presence on Monday and Friday (unless otherwise noted).\nRoblox provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws. Roblox also provides reasonable accommodations to candidates with qualifying disabilities or religious beliefs during the recruiting process.\nFor US based roles only, please note the Company may not be able to employ candidates for this role who have United States work authorization related to certain U.S. visa categories, or support future H-1B sponsorship at this time.","description_format":"text","description_chars":3903,"description_truncated":false,"requirements":{"experience_years_min":4,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Equity"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Mobile Games","Game Development","Metaverse"],"lifecycle":[{"event":"open","at":"2025-12-08T17:33:03Z"}],"visa":[{"country":"US","licensed_sponsor":true,"evidence":"H-1B filings in 12 months: 247 · green card filings: 82","filings_12m":247,"filings_prev_12m":236,"green_card_filings_12m":82,"median_offered_wage_usd":245038,"route":null,"cap_exempt":false,"checked_at":"2026-10-15T11:24:14+00:00","sources":["US Department of Labor: LCA disclosure data (H-1B, H-1B1, E-3)","US Department of Labor: PERM disclosure data (green cards)"],"filings_for_role_12m":159}],"liveness":{"score":8,"band":"cold","label":"Long shot","p_open":1,"p_active":0.29,"p_room":0.28,"age_days":314,"expected_fill_days":68,"reasons":["conf:3","stale_co","velocity","win:tail","crowd:brand"],"computed_at":"2026-10-19T05:45:15Z"},"pay":{"stated_usd_annual":295250,"is_top_pay":true},"html_url":"https://alion.io/job/roblox-principal-software-engineer-game-engine-systems-c","json_url":"https://alion.io/job/roblox-principal-software-engineer-game-engine-systems-c.json","meta":{"generated_at":"2026-10-19T09:24:28Z","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":6475,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-20T00:00:00Z"}},"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":246},"rest":"https://alion.io/mcp/rest/get_company?id=246"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Froblox-principal-software-engineer-game-engine-systems-c"},{"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%2Froblox-principal-software-engineer-game-engine-systems-c"},{"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%2Froblox-principal-software-engineer-game-engine-systems-c"},{"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/roblox-principal-software-engineer-game-engine-systems-c\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Froblox-principal-software-engineer-game-engine-systems-c"}]}