jobctl

Senior Software Engineer, Runtime

Roblox - San Mateo, CA, United States - original posting ->
Status
Open
Remote policy
Not stated
Employment type
Not stated
Salary
196,750-243,290 USD / year
Categories
Software Engineering
Tech
cppsoftwaresenior
Source
roblox
First observed
2026-08-19 17:26 UTC
Last seen
2026-10-04 07:47 UTC
Source claims posted
2026-08-19 17:19 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.

The Game Engine team at Roblox works on the systems that power the experiences at the heart of the metaverse. Our code is the technical foundation in our client, editor, and our simulation servers.

The Game Engine team is broadly split into departments — Audio-Video-Communication, Avatar, Core AI, Digital Matter, Productivity, and Systems. This position is for the Systems Runtime pod.

The Runtime pod builds and maintains the foundational C++ components that power the entire Roblox engine and Studio stack. We own the runtime layer — the performance, efficiency, and usability of the core primitives that every other engineering team relies on. Think of Runtime as the “standard library” and execution engine for Roblox's C++ world. Our ownership centers on three pillars:

Concurrency System — our task scheduler and fiber runtime power how work is parallelized across CPU cores, letting teams scale features across platforms while keeping code understandable and debuggable.

Memory System — we own the engine's memory allocator stack, tracking pipelines, and observability tooling to make memory behavior predictable and prevent leaks and fragmentation.

Profiling and Observability — we build and evolve the MicroProfiler and telemetry pipelines to help engineers diagnose real-world regressions and keep the client fast at global scale.

This role centers on our Concurrency system. You will own the scheduler and fiber runtime that the rest of the engine is built on, research and implement the performance work needed for 3K-player servers and genre expansion initiatives, and act as the point of contact other engine teams come to with concurrency asks. You will debug real production failures across PC, Mac, mobile, and console, and build deep intuition for how compilers, CPU architectures, and operating systems interact. A single well-designed primitive or optimization here makes hundreds of internal engineers more productive and millions of player sessions smoother.

You Will:

Take ownership of part of the engine's Concurrency system — the task scheduler, fiber runtime, and async APIs that every other engine team builds on.

Research and implement performance improvements that unblock platform initiatives – unlocking higher fidelity and richer experiences.

Serve as a point of contact for concurrency across the org: design reviews, hard parallelism bugs, and asks from other engine teams.

Improve the ergonomics, testability, and debuggability of concurrent code across PC, Mac, mobile, and console.

You Have:

Strong modern C++ (C++17 or newer) in a large, complex production codebase

Deep multithreading/concurrency experience — schedulers, thread pools, lock-free programming, atomics, memory models

Comfort profiling and reasoning about performance at the OS/CPU level

Nice to Have:

Game engine or real-time systems experience

Fiber/coroutine runtimes, work-stealing or job-system schedulers

Cross-platform low-level development (Android, iOS, console)

Track record as the go-to expert other teams consult on a system

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

$196,750—$243,290 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 87 observation(s).

Timeline

  1. *
    #191218 2026-08-19 17:26 UTC
    Published
  2. ~
    #193455 2026-08-19 19:27 UTC
    Modified
    • source_updated_at
      2026-08-19T13:19:28-04:00->2026-08-19T14:33:05-04:00
  3. ~
    #206416 2026-08-20 07:36 UTC
    Modified
    • source_updated_at
      2026-08-19T14:33:05-04:00->2026-08-20T02:33:10-04:00
  4. ~
    #223162 2026-08-20 20:23 UTC
    Modified
    • source_updated_at
      2026-08-20T02:33:10-04:00->2026-08-20T14:34:03-04:00
  5. ~
    #234919 2026-08-21 06:53 UTC
    Modified
    • source_updated_at
      2026-08-20T14:34:03-04:00->2026-08-21T02:33:33-04:00
  6. ~
    #254504 2026-08-21 19:50 UTC
    Modified
    • source_updated_at
      2026-08-21T02:33:33-04:00->2026-08-21T14:33:44-04:00
  7. ~
    #258727 2026-08-21 23:52 UTC
    Modified
    • source_updated_at
      2026-08-21T14:33:44-04:00->2026-08-21T15:58:21-04:00
  8. ~
    #281491 2026-08-22 21:12 UTC
    Modified
    • source_updated_at
      2026-08-21T15:58:21-04:00->2026-08-22T14:33:45-04:00
  9. ~
    #293178 2026-08-23 09:44 UTC
    Modified
    • source_updated_at
      2026-08-22T14:33:45-04:00->2026-08-23T02:32:46-04:00
  10. ~
    #303238 2026-08-23 21:11 UTC
    Modified
    • source_updated_at
      2026-08-23T02:32:46-04:00->2026-08-23T14:33:36-04:00
  11. ~
    #318370 2026-08-24 07:30 UTC
    Modified
    • source_updated_at
      2026-08-23T14:33:36-04:00->2026-08-24T02:33:01-04:00
  12. ~
    #338414 2026-08-24 22:19 UTC
    Modified
    • source_updated_at
      2026-08-24T02:33:01-04:00->2026-08-24T14:34:03-04:00
  13. ~
    #354190 2026-08-25 10:19 UTC
    Modified
    • source_updated_at
      2026-08-24T14:34:03-04:00->2026-08-25T02:33:12-04:00
  14. ~
    #363846 2026-08-25 19:02 UTC
    Modified
    • source_updated_at
      2026-08-25T02:33:12-04:00->2026-08-25T14:33:04-04:00
  15. ~
    #377422 2026-08-26 07:20 UTC
    Modified
    • source_updated_at
      2026-08-25T14:33:04-04:00->2026-08-26T02:33:17-04:00
  16. ~
    #387760 2026-08-26 22:35 UTC
    Modified
    • source_updated_at
      2026-08-26T02:33:17-04:00->2026-08-26T14:34:17-04:00
  17. ~
    #393949 2026-08-27 06:35 UTC
    Modified
    • source_updated_at
      2026-08-26T14:34:17-04:00->2026-08-27T02:33:52-04:00
  18. ~
    #402898 2026-08-27 18:36 UTC
    Modified
    • source_updated_at
      2026-08-27T02:33:52-04:00->2026-08-27T14:34:20-04:00
  19. ~
    #413261 2026-08-28 06:36 UTC
    Modified
    • source_updated_at
      2026-08-27T14:34:20-04:00->2026-08-28T02:33:42-04:00
  20. ~
    #429282 2026-08-28 23:17 UTC
    Modified
    • source_updated_at
      2026-08-28T02:33:42-04:00->2026-08-28T14:34:31-04:00
  21. ~
    #441967 2026-08-29 19:06 UTC
    Modified
    • source_updated_at
      2026-08-28T14:34:31-04:00->2026-08-29T14:32:44-04:00
  22. ~
    #456523 2026-08-30 07:48 UTC
    Modified
    • source_updated_at
      2026-08-29T14:32:44-04:00->2026-08-30T02:33:03-04:00
  23. ~
    #469295 2026-08-30 21:41 UTC
    Modified
    • source_updated_at
      2026-08-30T02:33:03-04:00->2026-08-30T14:32:44-04:00
  24. ~
    #477543 2026-08-31 09:19 UTC
    Modified
    • source_updated_at
      2026-08-30T14:32:44-04:00->2026-08-31T02:33:16-04:00
  25. ~
    #487300 2026-08-31 21:23 UTC
    Modified
    • source_updated_at
      2026-08-31T02:33:16-04:00->2026-08-31T14:32:54-04:00
  26. ~
    #496775 2026-09-01 09:23 UTC
    Modified
    • source_updated_at
      2026-08-31T14:32:54-04:00->2026-09-01T02:32:56-04:00
  27. ~
    #509023 2026-09-01 21:24 UTC
    Modified
    • source_updated_at
      2026-09-01T02:32:56-04:00->2026-09-01T14:33:25-04:00
  28. ~
    #523759 2026-09-02 09:24 UTC
    Modified
    • source_updated_at
      2026-09-01T14:33:25-04:00->2026-09-02T02:33:23-04:00
  29. ~
    #535396 2026-09-02 21:25 UTC
    Modified
    • source_updated_at
      2026-09-02T02:33:23-04:00->2026-09-02T14:33:59-04:00
  30. ~
    #547075 2026-09-03 09:25 UTC
    Modified
    • source_updated_at
      2026-09-02T14:33:59-04:00->2026-09-03T02:33:20-04:00
  31. ~
    #556613 2026-09-03 21:26 UTC
    Modified
    • source_updated_at
      2026-09-03T02:33:20-04:00->2026-09-03T14:34:05-04:00
  32. ~
    #567583 2026-09-04 09:26 UTC
    Modified
    • source_updated_at
      2026-09-03T14:34:05-04:00->2026-09-04T02:33:33-04:00
  33. ~
    #578276 2026-09-04 21:31 UTC
    Modified
    • source_updated_at
      2026-09-04T02:33:33-04:00->2026-09-04T14:34:09-04:00
  34. ~
    #592649 2026-09-05 19:42 UTC
    Modified
    • source_updated_at
      2026-09-04T14:34:09-04:00->2026-09-05T14:33:51-04:00
  35. ~
    #599221 2026-09-06 07:43 UTC
    Modified
    • source_updated_at
      2026-09-05T14:33:51-04:00->2026-09-06T02:33:20-04:00
  36. ~
    #606828 2026-09-06 19:43 UTC
    Modified
    • source_updated_at
      2026-09-06T02:33:20-04:00->2026-09-06T14:33:45-04:00
  37. ~
    #613059 2026-09-07 07:46 UTC
    Modified
    • source_updated_at
      2026-09-06T14:33:45-04:00->2026-09-07T02:33:48-04:00
  38. ~
    #622906 2026-09-07 19:47 UTC
    Modified
    • source_updated_at
      2026-09-07T02:33:48-04:00->2026-09-07T14:33:27-04:00
  39. ~
    #631327 2026-09-08 07:47 UTC
    Modified
    • source_updated_at
      2026-09-07T14:33:27-04:00->2026-09-08T02:33:38-04:00
  40. ~
    #641746 2026-09-08 19:49 UTC
    Modified
    • source_updated_at
      2026-09-08T02:33:38-04:00->2026-09-08T14:34:31-04:00
  41. ~
    #651281 2026-09-09 07:49 UTC
    Modified
    • source_updated_at
      2026-09-08T14:34:31-04:00->2026-09-09T02:34:06-04:00
  42. ~
    #662801 2026-09-09 19:54 UTC
    Modified
    • source_updated_at
      2026-09-09T02:34:06-04:00->2026-09-09T14:34:32-04:00
  43. ~
    #672739 2026-09-10 07:54 UTC
    Modified
    • source_updated_at
      2026-09-09T14:34:32-04:00->2026-09-10T02:34:16-04:00
  44. ~
    #685507 2026-09-10 19:55 UTC
    Modified
    • source_updated_at
      2026-09-10T02:34:16-04:00->2026-09-10T14:34:31-04:00
  45. ~
    #694227 2026-09-11 07:56 UTC
    Modified
    • source_updated_at
      2026-09-10T14:34:31-04:00->2026-09-11T02:34:01-04:00
  46. ~
    #706559 2026-09-11 21:18 UTC
    Modified
    • source_updated_at
      2026-09-11T02:34:01-04:00->2026-09-11T14:34:48-04:00
  47. ~
    #719921 2026-09-12 21:19 UTC
    Modified
    • source_updated_at
      2026-09-11T14:34:48-04:00->2026-09-12T14:34:21-04:00
  48. ~
    #726771 2026-09-13 09:19 UTC
    Modified
    • source_updated_at
      2026-09-12T14:34:21-04:00->2026-09-13T02:34:11-04:00
  49. ~
    #733183 2026-09-13 21:19 UTC
    Modified
    • source_updated_at
      2026-09-13T02:34:11-04:00->2026-09-13T14:34:27-04:00
  50. ~
    #740113 2026-09-14 09:28 UTC
    Modified
    • source_updated_at
      2026-09-13T14:34:27-04:00->2026-09-14T02:34:24-04:00
  51. ~
    #753134 2026-09-14 21:29 UTC
    Modified
    • source_updated_at
      2026-09-14T02:34:24-04:00->2026-09-14T14:34:46-04:00
  52. ~
    #764677 2026-09-15 09:29 UTC
    Modified
    • source_updated_at
      2026-09-14T14:34:46-04:00->2026-09-15T02:34:40-04:00
  53. ~
    #777316 2026-09-15 21:30 UTC
    Modified
    • source_updated_at
      2026-09-15T02:34:40-04:00->2026-09-15T14:34:51-04:00
  54. ~
    #788054 2026-09-16 09:30 UTC
    Modified
    • source_updated_at
      2026-09-15T14:34:51-04:00->2026-09-16T02:34:36-04:00
  55. ~
    #800442 2026-09-16 21:31 UTC
    Modified
    • source_updated_at
      2026-09-16T02:34:36-04:00->2026-09-16T14:35:14-04:00
  56. ~
    #810681 2026-09-17 09:32 UTC
    Modified
    • source_updated_at
      2026-09-16T14:35:14-04:00->2026-09-17T02:35:18-04:00
  57. ~
    #820274 2026-09-17 21:32 UTC
    Modified
    • source_updated_at
      2026-09-17T02:35:18-04:00->2026-09-17T14:35:20-04:00
  58. ~
    #830618 2026-09-18 09:36 UTC
    Modified
    • source_updated_at
      2026-09-17T14:35:20-04:00->2026-09-18T02:34:59-04:00
  59. ~
    #846840 2026-09-18 21:37 UTC
    Modified
    • source_updated_at
      2026-09-18T02:34:59-04:00->2026-09-18T14:35:49-04:00
  60. ~
    #867118 2026-09-19 21:38 UTC
    Modified
    • source_updated_at
      2026-09-18T14:35:49-04:00->2026-09-19T14:34:47-04:00
  61. ~
    #874414 2026-09-20 09:39 UTC
    Modified
    • source_updated_at
      2026-09-19T14:34:47-04:00->2026-09-20T02:34:58-04:00
  62. ~
    #882135 2026-09-20 21:40 UTC
    Modified
    • source_updated_at
      2026-09-20T02:34:58-04:00->2026-09-20T14:34:49-04:00
  63. ~
    #889020 2026-09-21 09:49 UTC
    Modified
    • source_updated_at
      2026-09-20T14:34:49-04:00->2026-09-21T02:34:52-04:00
  64. ~
    #905528 2026-09-21 21:49 UTC
    Modified
    • source_updated_at
      2026-09-21T02:34:52-04:00->2026-09-21T14:35:25-04:00
  65. ~
    #918781 2026-09-22 09:53 UTC
    Modified
    • source_updated_at
      2026-09-21T14:35:25-04:00->2026-09-22T02:35:14-04:00
  66. ~
    #930310 2026-09-22 21:53 UTC
    Modified
    • source_updated_at
      2026-09-22T02:35:14-04:00->2026-09-22T14:36:10-04:00
  67. ~
    #941122 2026-09-23 09:54 UTC
    Modified
    • source_updated_at
      2026-09-22T14:36:10-04:00->2026-09-23T02:35:35-04:00
  68. ~
    #956671 2026-09-23 21:54 UTC
    Modified
    • source_updated_at
      2026-09-23T02:35:35-04:00->2026-09-23T14:36:02-04:00
  69. ~
    #967198 2026-09-24 09:59 UTC
    Modified
    • source_updated_at
      2026-09-23T14:36:02-04:00->2026-09-24T02:36:22-04:00
  70. ~
    #980217 2026-09-24 22:03 UTC
    Modified
    • source_updated_at
      2026-09-24T02:36:22-04:00->2026-09-24T14:35:59-04:00
  71. ~
    #994176 2026-09-25 10:08 UTC
    Modified
    • source_updated_at
      2026-09-24T14:35:59-04:00->2026-09-25T02:35:27-04:00
  72. ~
    #1007495 2026-09-25 22:13 UTC
    Modified
    • source_updated_at
      2026-09-25T02:35:27-04:00->2026-09-25T14:36:09-04:00
  73. ~
    #1022937 2026-09-26 22:19 UTC
    Modified
    • source_updated_at
      2026-09-25T14:36:09-04:00->2026-09-26T14:35:51-04:00
  74. ~
    #1029545 2026-09-27 10:19 UTC
    Modified
    • source_updated_at
      2026-09-26T14:35:51-04:00->2026-09-27T02:35:24-04:00
  75. ~
    #1036554 2026-09-27 22:19 UTC
    Modified
    • source_updated_at
      2026-09-27T02:35:24-04:00->2026-09-27T14:35:28-04:00
  76. ~
    #1043762 2026-09-28 10:25 UTC
    Modified
    • source_updated_at
      2026-09-27T14:35:28-04:00->2026-09-28T02:35:49-04:00
  77. ~
    #1054315 2026-09-28 22:26 UTC
    Modified
    • source_updated_at
      2026-09-28T02:35:49-04:00->2026-09-28T14:36:08-04:00
  78. ~
    #1063491 2026-09-29 10:34 UTC
    Modified
    • source_updated_at
      2026-09-28T14:36:08-04:00->2026-09-29T02:36:05-04:00
  79. ~
    #1077143 2026-09-29 22:36 UTC
    Modified
    • source_updated_at
      2026-09-29T02:36:05-04:00->2026-09-29T16:09:38-04:00
  80. ~
    #1085842 2026-09-30 06:37 UTC
    Modified
    • source_updated_at
      2026-09-29T16:09:38-04:00->2026-09-30T02:35:55-04:00
  81. ~
    #1096130 2026-09-30 18:37 UTC
    Modified
    • source_updated_at
      2026-09-30T02:35:55-04:00->2026-09-30T14:36:45-04:00
  82. ~
    #1106050 2026-10-01 06:41 UTC
    Modified
    • source_updated_at
      2026-09-30T14:36:45-04:00->2026-10-01T02:36:12-04:00
  83. ~
    #1118218 2026-10-01 18:47 UTC
    Modified
    • source_updated_at
      2026-10-01T02:36:12-04:00->2026-10-01T14:36:26-04:00
  84. ~
    #1129628 2026-10-02 07:06 UTC
    Modified
    • source_updated_at
      2026-10-01T14:36:26-04:00->2026-10-02T02:36:44-04:00
  85. ~
    #1140526 2026-10-02 19:24 UTC
    Modified
    • source_updated_at
      2026-10-02T02:36:44-04:00->2026-10-02T14:37:12-04:00
  86. ~
    #1159781 2026-10-03 19:33 UTC
    Modified
    • source_updated_at
      2026-10-02T14:37:12-04:00->2026-10-03T14:36:12-04:00
  87. ~
    #1167548 2026-10-04 07:47 UTC
    Modified
    • source_updated_at
      2026-10-03T14:36:12-04:00->2026-10-04T02:36:21-04:00