jobctl

Senior Security Software Engineer, Sandbox Platforms

Roblox - San Mateo, CA, United States - original posting ->
Status
Open
Remote policy
Not stated
Employment type
Not stated
Salary
269,170-326,060 USD / year
Categories
Engineering
Tech
cpprustsecuritysenior
Source
roblox
First observed
2026-09-15 21:30 UTC
Last seen
2026-10-30 22:00 UTC
Source claims posted
2026-09-15 19:02 UTC
Consecutive misses
0 of 3

What the posting says

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.

At 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.

A 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.

About the role

We build the isolation layers that contain untrusted and semi-trusted code. You will design, build, and harden process sandboxes across one or more of Linux, macOS, and Windows, the last line of defense when something inside goes wrong. This is a deep systems role for someone who thinks in terms of attack surface, threat models, and the exact boundary between trusted and untrusted.

You Will:

Design and implement sandboxes using platform primitives: nsjail, seccomp-bpf, namespaces, cgroups, and Landlock on Linux; the Seatbelt (sandbox_init / SBPL) and related mechanisms on macOS; AppContainer, job objects, restricted tokens, and integrity levels on Windows.

Define and lock down every communication path in and out of the sandbox: syscalls, IPC, shared memory, file descriptors, sockets, brokers, and minimize what each one exposes.

Enumerate and reduce attack surface: kernel syscall surface, broker interfaces, device access, and side channels. Assume the code inside is hostile.

Make deliberate engineering tradeoffs between isolation strength, performance, compatibility, and maintainability, and document the reasoning.

Write threat models, review designs, and respond to sandbox escapes and hardening findings.

You Have:

Deep, hands-on knowledge of the OS security model on at least one of Linux, macOS, or Windows, and the sandboxing primitives that platform provides.

Strong grasp of attack surface analysis: how sandboxes are escaped and how to shrink the ways in.

Fluency in the boundary between sandbox and host (brokers, IPC, syscall filtering, privilege separation) and how to design a minimal, well-audited interface.

Systems programming in C, C++, or Rust; comfort at the syscall and kernel-interface level.

Sound judgment on tradeoffs: knowing when tighter isolation is worth the cost and when it isn't.

A security mindset: you default to least privilege and distrust every input crossing the boundary.

Nice to have

Experience across more than one of the three platforms.

Kernel, hypervisor, or low-level OS internals work.

Fuzzing, exploit development, or red-team experience against isolation boundaries.

For 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.

Annual Salary Range

$269,170—$326,060 USD

Roles that are based in an office are onsite Tuesday, Wednesday, and Thursday, with optional presence on Monday and Friday (unless otherwise noted).

Roblox 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.

For 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.

Quality

Completeness: 80%
Honesty: 100%

Based on 85 observation(s).

Timeline

  1. *
    #777441 2026-09-15 21:30 UTC
    Published
  2. ~
    #788177 2026-09-16 09:30 UTC
    Modified
    • source_updated_at
      2026-09-15T15:02:52-04:00->2026-09-16T02:30:19-04:00
  3. ~
    #800566 2026-09-16 21:31 UTC
    Modified
    • source_updated_at
      2026-09-16T02:30:19-04:00->2026-09-16T14:30:26-04:00
  4. ~
    #810805 2026-09-17 09:32 UTC
    Modified
    • source_updated_at
      2026-09-16T14:30:26-04:00->2026-09-17T02:30:28-04:00
  5. ~
    #820400 2026-09-17 21:32 UTC
    Modified
    • source_updated_at
      2026-09-17T02:30:28-04:00->2026-09-17T14:30:40-04:00
  6. ~
    #830745 2026-09-18 09:36 UTC
    Modified
    • source_updated_at
      2026-09-17T14:30:40-04:00->2026-09-18T02:30:44-04:00
  7. ~
    #846967 2026-09-18 21:37 UTC
    Modified
    • source_updated_at
      2026-09-18T02:30:44-04:00->2026-09-18T14:31:06-04:00
  8. ~
    #867242 2026-09-19 21:38 UTC
    Modified
    • source_updated_at
      2026-09-18T14:31:06-04:00->2026-09-19T14:30:53-04:00
  9. ~
    #874538 2026-09-20 09:39 UTC
    Modified
    • source_updated_at
      2026-09-19T14:30:53-04:00->2026-09-20T02:30:54-04:00
  10. ~
    #882258 2026-09-20 21:40 UTC
    Modified
    • source_updated_at
      2026-09-20T02:30:54-04:00->2026-09-20T14:30:56-04:00
  11. ~
    #889144 2026-09-21 09:49 UTC
    Modified
    • source_updated_at
      2026-09-20T14:30:56-04:00->2026-09-21T02:30:57-04:00
  12. ~
    #905658 2026-09-21 21:49 UTC
    Modified
    • source_updated_at
      2026-09-21T02:30:57-04:00->2026-09-21T14:31:11-04:00
  13. ~
    #918913 2026-09-22 09:53 UTC
    Modified
    • source_updated_at
      2026-09-21T14:31:11-04:00->2026-09-22T02:31:18-04:00
  14. ~
    #930444 2026-09-22 21:53 UTC
    Modified
    • source_updated_at
      2026-09-22T02:31:18-04:00->2026-09-22T14:31:29-04:00
  15. ~
    #941255 2026-09-23 09:54 UTC
    Modified
    • source_updated_at
      2026-09-22T14:31:29-04:00->2026-09-23T02:31:27-04:00
  16. ~
    #956805 2026-09-23 21:54 UTC
    Modified
    • source_updated_at
      2026-09-23T02:31:27-04:00->2026-09-23T14:31:39-04:00
  17. ~
    #967332 2026-09-24 09:59 UTC
    Modified
    • source_updated_at
      2026-09-23T14:31:39-04:00->2026-09-24T02:32:02-04:00
  18. ~
    #980351 2026-09-24 22:03 UTC
    Modified
    • source_updated_at
      2026-09-24T02:32:02-04:00->2026-09-24T14:31:59-04:00
  19. ~
    #994310 2026-09-25 10:08 UTC
    Modified
    • source_updated_at
      2026-09-24T14:31:59-04:00->2026-09-25T02:31:41-04:00
  20. ~
    #1007630 2026-09-25 22:13 UTC
    Modified
    • source_updated_at
      2026-09-25T02:31:41-04:00->2026-09-25T14:32:06-04:00
  21. ~
    #1023072 2026-09-26 22:19 UTC
    Modified
    • source_updated_at
      2026-09-25T14:32:06-04:00->2026-09-26T14:31:56-04:00
  22. ~
    #1029680 2026-09-27 10:19 UTC
    Modified
    • source_updated_at
      2026-09-26T14:31:56-04:00->2026-09-27T02:31:53-04:00
  23. ~
    #1036689 2026-09-27 22:19 UTC
    Modified
    • source_updated_at
      2026-09-27T02:31:53-04:00->2026-09-27T14:31:53-04:00
  24. ~
    #1043897 2026-09-28 10:25 UTC
    Modified
    • source_updated_at
      2026-09-27T14:31:53-04:00->2026-09-28T02:32:02-04:00
  25. ~
    #1054450 2026-09-28 22:26 UTC
    Modified
    • source_updated_at
      2026-09-28T02:32:02-04:00->2026-09-28T14:32:15-04:00
  26. ~
    #1059430 2026-09-29 06:33 UTC
    Modified
    • source_updated_at
      2026-09-28T14:32:15-04:00->2026-09-29T02:32:08-04:00
  27. ~
    #1073246 2026-09-29 18:34 UTC
    Modified
    • source_updated_at
      2026-09-29T02:32:08-04:00->2026-09-29T14:32:18-04:00
  28. ~
    #1077300 2026-09-29 22:36 UTC
    Modified
    • source_updated_at
      2026-09-29T14:32:18-04:00->2026-09-29T16:09:38-04:00
  29. ~
    #1085905 2026-09-30 06:37 UTC
    Modified
    • source_updated_at
      2026-09-29T16:09:38-04:00->2026-09-30T02:32:08-04:00
  30. ~
    #1096188 2026-09-30 18:37 UTC
    Modified
    • source_updated_at
      2026-09-30T02:32:08-04:00->2026-09-30T14:32:43-04:00
  31. ~
    #1106146 2026-10-01 06:41 UTC
    Modified
    • source_updated_at
      2026-09-30T14:32:43-04:00->2026-10-01T02:32:33-04:00
  32. ~
    #1118351 2026-10-01 18:47 UTC
    Modified
    • source_updated_at
      2026-10-01T02:32:33-04:00->2026-10-01T14:32:34-04:00
  33. ~
    #1129762 2026-10-02 07:06 UTC
    Modified
    • source_updated_at
      2026-10-01T14:32:34-04:00->2026-10-02T02:32:42-04:00
  34. ~
    #1140660 2026-10-02 19:24 UTC
    Modified
    • source_updated_at
      2026-10-02T02:32:42-04:00->2026-10-02T14:33:11-04:00
  35. ~
    #1159915 2026-10-03 19:33 UTC
    Modified
    • source_updated_at
      2026-10-02T14:33:11-04:00->2026-10-03T14:32:45-04:00
  36. ~
    #1167682 2026-10-04 07:47 UTC
    Modified
    • source_updated_at
      2026-10-03T14:32:45-04:00->2026-10-04T02:32:50-04:00
  37. ~
    #1174164 2026-10-04 19:55 UTC
    Modified
    • source_updated_at
      2026-10-04T02:32:50-04:00->2026-10-04T14:32:56-04:00
  38. ~
    #1180372 2026-10-05 08:04 UTC
    Modified
    • source_updated_at
      2026-10-04T14:32:56-04:00->2026-10-05T02:32:51-04:00
  39. ~
    #1188746 2026-10-05 18:41 UTC
    Modified
    • source_updated_at
      2026-10-05T02:32:51-04:00->2026-10-05T14:33:39-04:00
  40. ~
    #1204231 2026-10-06 10:23 UTC
    Modified
    • source_updated_at
      2026-10-05T14:33:39-04:00->2026-10-06T02:33:10-04:00
  41. ~
    #1220487 2026-10-06 22:40 UTC
    Modified
    • source_updated_at
      2026-10-06T02:33:10-04:00->2026-10-06T14:33:50-04:00
  42. ~
    #1227104 2026-10-07 06:40 UTC
    Modified
    • source_updated_at
      2026-10-06T14:33:50-04:00->2026-10-07T02:33:14-04:00
  43. ~
    #1238328 2026-10-07 18:46 UTC
    Modified
    • source_updated_at
      2026-10-07T02:33:14-04:00->2026-10-07T14:33:48-04:00
  44. ~
    #1249473 2026-10-08 06:58 UTC
    Modified
    • source_updated_at
      2026-10-07T14:33:48-04:00->2026-10-08T02:33:29-04:00
  45. ~
    #1259851 2026-10-08 18:59 UTC
    Modified
    • source_updated_at
      2026-10-08T02:33:29-04:00->2026-10-08T14:34:00-04:00
  46. ~
    #1270797 2026-10-09 07:00 UTC
    Modified
    • source_updated_at
      2026-10-08T14:34:00-04:00->2026-10-09T02:33:53-04:00
  47. ~
    #1283041 2026-10-09 19:55 UTC
    Modified
    • source_updated_at
      2026-10-09T02:33:53-04:00->2026-10-09T14:34:21-04:00
  48. ~
    #1294965 2026-10-12 13:22 UTC
    Modified
    • source_updated_at
      2026-10-09T14:34:21-04:00->2026-10-12T02:34:04-04:00
  49. ~
    #1301801 2026-10-12 17:07 UTC
    Modified
    • source_updated_at
      2026-10-12T02:34:04-04:00->2026-10-12T12:52:50-04:00
  50. ~
    #1307459 2026-10-12 21:07 UTC
    Modified
    • source_updated_at
      2026-10-12T12:52:50-04:00->2026-10-12T14:34:13-04:00
  51. ~
    #1316636 2026-10-13 09:08 UTC
    Modified
    • source_updated_at
      2026-10-12T14:34:13-04:00->2026-10-13T02:34:27-04:00
  52. ~
    #1329236 2026-10-13 21:09 UTC
    Modified
    • source_updated_at
      2026-10-13T02:34:27-04:00->2026-10-13T14:34:24-04:00
  53. ~
    #1333031 2026-10-14 01:09 UTC
    Modified
    • source_updated_at
      2026-10-13T14:34:24-04:00->2026-10-13T20:05:20-04:00
  54. ~
    #1339581 2026-10-14 09:09 UTC
    Modified
    • source_updated_at
      2026-10-13T20:05:20-04:00->2026-10-14T02:33:55-04:00
  55. ~
    #1349334 2026-10-14 21:52 UTC
    Modified
    • source_updated_at
      2026-10-14T02:33:55-04:00->2026-10-14T14:34:43-04:00
  56. ~
    #1358205 2026-10-15 09:52 UTC
    Modified
    • source_updated_at
      2026-10-14T14:34:43-04:00->2026-10-15T02:34:02-04:00
  57. ~
    #1367444 2026-10-15 21:52 UTC
    Modified
    • source_updated_at
      2026-10-15T02:34:02-04:00->2026-10-15T14:34:26-04:00
  58. ~
    #1375127 2026-10-16 09:53 UTC
    Modified
    • source_updated_at
      2026-10-15T14:34:26-04:00->2026-10-16T02:34:22-04:00
  59. ~
    #1384571 2026-10-16 21:53 UTC
    Modified
    • source_updated_at
      2026-10-16T02:34:22-04:00->2026-10-16T14:34:38-04:00
  60. ~
    #1397897 2026-10-17 21:53 UTC
    Modified
    • source_updated_at
      2026-10-16T14:34:38-04:00->2026-10-17T14:37:50-04:00
  61. ~
    #1402929 2026-10-18 09:53 UTC
    Modified
    • source_updated_at
      2026-10-17T14:37:50-04:00->2026-10-18T02:38:11-04:00
  62. ~
    #1411382 2026-10-18 21:54 UTC
    Modified
    • source_updated_at
      2026-10-18T02:38:11-04:00->2026-10-18T14:37:26-04:00
  63. ~
    #1416335 2026-10-19 09:55 UTC
    Modified
    • source_updated_at
      2026-10-18T14:37:26-04:00->2026-10-19T02:37:16-04:00
  64. ~
    #1427122 2026-10-19 21:56 UTC
    Modified
    • source_updated_at
      2026-10-19T02:37:16-04:00->2026-10-19T14:37:48-04:00
  65. ~
    #1435359 2026-10-20 09:56 UTC
    Modified
    • source_updated_at
      2026-10-19T14:37:48-04:00->2026-10-20T02:37:33-04:00
  66. ~
    #1446790 2026-10-20 21:56 UTC
    Modified
    • source_updated_at
      2026-10-20T02:37:33-04:00->2026-10-20T17:03:29-04:00
  67. ~
    #1455081 2026-10-21 09:56 UTC
    Modified
    • source_updated_at
      2026-10-20T17:03:29-04:00->2026-10-21T02:37:45-04:00
  68. ~
    #1466060 2026-10-21 21:56 UTC
    Modified
    • source_updated_at
      2026-10-21T02:37:45-04:00->2026-10-21T14:38:22-04:00
  69. ~
    #1477843 2026-10-22 09:56 UTC
    Modified
    • source_updated_at
      2026-10-21T14:38:22-04:00->2026-10-22T02:37:50-04:00
  70. ~
    #1491743 2026-10-22 21:56 UTC
    Modified
    • source_updated_at
      2026-10-22T02:37:50-04:00->2026-10-22T14:38:21-04:00
  71. ~
    #1500127 2026-10-23 09:56 UTC
    Modified
    • source_updated_at
      2026-10-22T14:38:21-04:00->2026-10-23T02:37:43-04:00
  72. ~
    #1510774 2026-10-23 21:57 UTC
    Modified
    • source_updated_at
      2026-10-23T02:37:43-04:00->2026-10-23T14:38:31-04:00
  73. ~
    #1528611 2026-10-24 21:57 UTC
    Modified
    • source_updated_at
      2026-10-23T14:38:31-04:00->2026-10-24T14:39:49-04:00
  74. ~
    #1534512 2026-10-25 09:57 UTC
    Modified
    • source_updated_at
      2026-10-24T14:39:49-04:00->2026-10-25T02:36:23-04:00
  75. ~
    #1539953 2026-10-25 21:57 UTC
    Modified
    • source_updated_at
      2026-10-25T02:36:23-04:00->2026-10-25T14:39:37-04:00
  76. ~
    #1545305 2026-10-26 09:57 UTC
    Modified
    • source_updated_at
      2026-10-25T14:39:37-04:00->2026-10-26T02:36:30-04:00
  77. ~
    #1557065 2026-10-26 21:58 UTC
    Modified
    • source_updated_at
      2026-10-26T02:36:30-04:00->2026-10-26T14:39:57-04:00
  78. ~
    #1563431 2026-10-27 09:58 UTC
    Modified
    • source_updated_at
      2026-10-26T14:39:57-04:00->2026-10-27T02:36:50-04:00
  79. ~
    #1576163 2026-10-27 21:58 UTC
    Modified
    • source_updated_at
      2026-10-27T02:36:50-04:00->2026-10-27T14:40:15-04:00
  80. ~
    #1588170 2026-10-28 09:59 UTC
    Modified
    • source_updated_at
      2026-10-27T14:40:15-04:00->2026-10-28T02:38:46-04:00
  81. ~
    #1597187 2026-10-28 21:59 UTC
    Modified
    • source_updated_at
      2026-10-28T02:38:46-04:00->2026-10-28T14:41:17-04:00
  82. ~
    #1606151 2026-10-29 09:59 UTC
    Modified
    • source_updated_at
      2026-10-28T14:41:17-04:00->2026-10-29T02:36:55-04:00
  83. ~
    #1622414 2026-10-29 22:00 UTC
    Modified
    • source_updated_at
      2026-10-29T02:36:55-04:00->2026-10-29T14:40:44-04:00
  84. ~
    #1633173 2026-10-30 10:00 UTC
    Modified
    • source_updated_at
      2026-10-29T14:40:44-04:00->2026-10-30T02:37:20-04:00
  85. ~
    #1644682 2026-10-30 22:00 UTC
    Modified
    • source_updated_at
      2026-10-30T02:37:20-04:00->2026-10-30T17:29:34-04:00