jobctl

Senior Software Engineer, Core Engine

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
2026-08-27 02:35 UTC
Last seen
2026-10-12 13:22 UTC
Source claims posted
2026-08-27 00:05 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 84 observation(s).

Timeline

  1. *
    #391458 2026-08-27 02:35 UTC
    Published
  2. ~
    #393958 2026-08-27 06:35 UTC
    Modified
    • source_updated_at
      2026-08-26T20:05:46-04:00->2026-08-27T02:33:52-04:00
  3. ~
    #402907 2026-08-27 18:36 UTC
    Modified
    • source_updated_at
      2026-08-27T02:33:52-04:00->2026-08-27T14:34:20-04:00
  4. ~
    #413272 2026-08-28 06:36 UTC
    Modified
    • source_updated_at
      2026-08-27T14:34:20-04:00->2026-08-28T02:33:42-04:00
  5. ~
    #429307 2026-08-28 23:17 UTC
    Modified
    • source_updated_at
      2026-08-28T02:33:42-04:00->2026-08-28T14:34:31-04:00
  6. ~
    #441991 2026-08-29 19:06 UTC
    Modified
    • source_updated_at
      2026-08-28T14:34:31-04:00->2026-08-29T14:32:44-04:00
  7. ~
    #456547 2026-08-30 07:48 UTC
    Modified
    • source_updated_at
      2026-08-29T14:32:44-04:00->2026-08-30T02:33:03-04:00
  8. ~
    #469319 2026-08-30 21:41 UTC
    Modified
    • source_updated_at
      2026-08-30T02:33:03-04:00->2026-08-30T14:32:44-04:00
  9. ~
    #477567 2026-08-31 09:19 UTC
    Modified
    • source_updated_at
      2026-08-30T14:32:44-04:00->2026-08-31T02:33:16-04:00
  10. ~
    #487321 2026-08-31 21:23 UTC
    Modified
    • source_updated_at
      2026-08-31T02:33:16-04:00->2026-08-31T14:32:54-04:00
  11. ~
    #496797 2026-09-01 09:23 UTC
    Modified
    • source_updated_at
      2026-08-31T14:32:54-04:00->2026-09-01T02:32:56-04:00
  12. ~
    #509049 2026-09-01 21:24 UTC
    Modified
    • source_updated_at
      2026-09-01T02:32:56-04:00->2026-09-01T14:33:25-04:00
  13. ~
    #523785 2026-09-02 09:24 UTC
    Modified
    • source_updated_at
      2026-09-01T14:33:25-04:00->2026-09-02T02:33:23-04:00
  14. ~
    #535421 2026-09-02 21:25 UTC
    Modified
    • source_updated_at
      2026-09-02T02:33:23-04:00->2026-09-02T14:33:59-04:00
  15. ~
    #547100 2026-09-03 09:25 UTC
    Modified
    • source_updated_at
      2026-09-02T14:33:59-04:00->2026-09-03T02:33:20-04:00
  16. ~
    #556638 2026-09-03 21:26 UTC
    Modified
    • source_updated_at
      2026-09-03T02:33:20-04:00->2026-09-03T14:34:05-04:00
  17. ~
    #567608 2026-09-04 09:26 UTC
    Modified
    • source_updated_at
      2026-09-03T14:34:05-04:00->2026-09-04T02:33:33-04:00
  18. ~
    #578300 2026-09-04 21:31 UTC
    Modified
    • source_updated_at
      2026-09-04T02:33:33-04:00->2026-09-04T14:34:09-04:00
  19. ~
    #592673 2026-09-05 19:42 UTC
    Modified
    • source_updated_at
      2026-09-04T14:34:09-04:00->2026-09-05T14:33:51-04:00
  20. ~
    #599245 2026-09-06 07:43 UTC
    Modified
    • source_updated_at
      2026-09-05T14:33:51-04:00->2026-09-06T02:33:20-04:00
  21. ~
    #606852 2026-09-06 19:43 UTC
    Modified
    • source_updated_at
      2026-09-06T02:33:20-04:00->2026-09-06T14:33:45-04:00
  22. ~
    #613083 2026-09-07 07:46 UTC
    Modified
    • source_updated_at
      2026-09-06T14:33:45-04:00->2026-09-07T02:33:48-04:00
  23. ~
    #622930 2026-09-07 19:47 UTC
    Modified
    • source_updated_at
      2026-09-07T02:33:48-04:00->2026-09-07T14:33:27-04:00
  24. ~
    #631351 2026-09-08 07:47 UTC
    Modified
    • source_updated_at
      2026-09-07T14:33:27-04:00->2026-09-08T02:33:38-04:00
  25. ~
    #641770 2026-09-08 19:49 UTC
    Modified
    • source_updated_at
      2026-09-08T02:33:38-04:00->2026-09-08T14:34:31-04:00
  26. ~
    #651306 2026-09-09 07:49 UTC
    Modified
    • source_updated_at
      2026-09-08T14:34:31-04:00->2026-09-09T02:34:06-04:00
  27. ~
    #662825 2026-09-09 19:54 UTC
    Modified
    • source_updated_at
      2026-09-09T02:34:06-04:00->2026-09-09T14:34:32-04:00
  28. ~
    #672763 2026-09-10 07:54 UTC
    Modified
    • source_updated_at
      2026-09-09T14:34:32-04:00->2026-09-10T02:34:16-04:00
  29. ~
    #685529 2026-09-10 19:55 UTC
    Modified
    • source_updated_at
      2026-09-10T02:34:16-04:00->2026-09-10T14:34:31-04:00
  30. ~
    #694250 2026-09-11 07:56 UTC
    Modified
    • source_updated_at
      2026-09-10T14:34:31-04:00->2026-09-11T02:34:01-04:00
  31. ~
    #706581 2026-09-11 21:18 UTC
    Modified
    • source_updated_at
      2026-09-11T02:34:01-04:00->2026-09-11T14:34:48-04:00
  32. ~
    #719942 2026-09-12 21:19 UTC
    Modified
    • source_updated_at
      2026-09-11T14:34:48-04:00->2026-09-12T14:34:21-04:00
  33. ~
    #726792 2026-09-13 09:19 UTC
    Modified
    • source_updated_at
      2026-09-12T14:34:21-04:00->2026-09-13T02:34:11-04:00
  34. ~
    #733204 2026-09-13 21:19 UTC
    Modified
    • source_updated_at
      2026-09-13T02:34:11-04:00->2026-09-13T14:34:27-04:00
  35. ~
    #740134 2026-09-14 09:28 UTC
    Modified
    • source_updated_at
      2026-09-13T14:34:27-04:00->2026-09-14T02:34:24-04:00
  36. ~
    #753157 2026-09-14 21:29 UTC
    Modified
    • source_updated_at
      2026-09-14T02:34:24-04:00->2026-09-14T14:34:46-04:00
  37. ~
    #764700 2026-09-15 09:29 UTC
    Modified
    • source_updated_at
      2026-09-14T14:34:46-04:00->2026-09-15T02:34:40-04:00
  38. ~
    #777341 2026-09-15 21:30 UTC
    Modified
    • source_updated_at
      2026-09-15T02:34:40-04:00->2026-09-15T14:34:51-04:00
  39. ~
    #788079 2026-09-16 09:30 UTC
    Modified
    • source_updated_at
      2026-09-15T14:34:51-04:00->2026-09-16T02:34:36-04:00
  40. ~
    #800467 2026-09-16 21:31 UTC
    Modified
    • source_updated_at
      2026-09-16T02:34:36-04:00->2026-09-16T14:35:14-04:00
  41. ~
    #810706 2026-09-17 09:32 UTC
    Modified
    • source_updated_at
      2026-09-16T14:35:14-04:00->2026-09-17T02:35:18-04:00
  42. ~
    #820299 2026-09-17 21:32 UTC
    Modified
    • source_updated_at
      2026-09-17T02:35:18-04:00->2026-09-17T14:35:20-04:00
  43. ~
    #830643 2026-09-18 09:36 UTC
    Modified
    • source_updated_at
      2026-09-17T14:35:20-04:00->2026-09-18T02:34:59-04:00
  44. ~
    #846865 2026-09-18 21:37 UTC
    Modified
    • source_updated_at
      2026-09-18T02:34:59-04:00->2026-09-18T14:35:49-04:00
  45. ~
    #867143 2026-09-19 21:38 UTC
    Modified
    • source_updated_at
      2026-09-18T14:35:49-04:00->2026-09-19T14:34:47-04:00
  46. ~
    #874439 2026-09-20 09:39 UTC
    Modified
    • source_updated_at
      2026-09-19T14:34:47-04:00->2026-09-20T02:34:58-04:00
  47. ~
    #882160 2026-09-20 21:40 UTC
    Modified
    • source_updated_at
      2026-09-20T02:34:58-04:00->2026-09-20T14:34:49-04:00
  48. ~
    #889046 2026-09-21 09:49 UTC
    Modified
    • source_updated_at
      2026-09-20T14:34:49-04:00->2026-09-21T02:34:52-04:00
  49. ~
    #905554 2026-09-21 21:49 UTC
    Modified
    • source_updated_at
      2026-09-21T02:34:52-04:00->2026-09-21T14:35:25-04:00
  50. ~
    #918807 2026-09-22 09:53 UTC
    Modified
    • source_updated_at
      2026-09-21T14:35:25-04:00->2026-09-22T02:35:14-04:00
  51. ~
    #930337 2026-09-22 21:53 UTC
    Modified
    • source_updated_at
      2026-09-22T02:35:14-04:00->2026-09-22T14:36:10-04:00
  52. ~
    #941149 2026-09-23 09:54 UTC
    Modified
    • source_updated_at
      2026-09-22T14:36:10-04:00->2026-09-23T02:35:35-04:00
  53. ~
    #956698 2026-09-23 21:54 UTC
    Modified
    • source_updated_at
      2026-09-23T02:35:35-04:00->2026-09-23T14:36:02-04:00
  54. ~
    #967225 2026-09-24 09:59 UTC
    Modified
    • source_updated_at
      2026-09-23T14:36:02-04:00->2026-09-24T02:36:22-04:00
  55. ~
    #980244 2026-09-24 22:03 UTC
    Modified
    • source_updated_at
      2026-09-24T02:36:22-04:00->2026-09-24T14:35:59-04:00
  56. ~
    #994203 2026-09-25 10:08 UTC
    Modified
    • source_updated_at
      2026-09-24T14:35:59-04:00->2026-09-25T02:35:27-04:00
  57. ~
    #1007523 2026-09-25 22:13 UTC
    Modified
    • source_updated_at
      2026-09-25T02:35:27-04:00->2026-09-25T14:36:09-04:00
  58. ~
    #1022964 2026-09-26 22:19 UTC
    Modified
    • source_updated_at
      2026-09-25T14:36:09-04:00->2026-09-26T14:35:51-04:00
  59. ~
    #1029572 2026-09-27 10:19 UTC
    Modified
    • source_updated_at
      2026-09-26T14:35:51-04:00->2026-09-27T02:35:24-04:00
  60. ~
    #1036581 2026-09-27 22:19 UTC
    Modified
    • source_updated_at
      2026-09-27T02:35:24-04:00->2026-09-27T14:35:28-04:00
  61. ~
    #1043789 2026-09-28 10:25 UTC
    Modified
    • source_updated_at
      2026-09-27T14:35:28-04:00->2026-09-28T02:35:49-04:00
  62. ~
    #1054342 2026-09-28 22:26 UTC
    Modified
    • source_updated_at
      2026-09-28T02:35:49-04:00->2026-09-28T14:36:08-04:00
  63. ~
    #1063513 2026-09-29 10:34 UTC
    Modified
    • source_updated_at
      2026-09-28T14:36:08-04:00->2026-09-29T02:36:05-04:00
  64. ~
    #1077172 2026-09-29 22:36 UTC
    Modified
    • source_updated_at
      2026-09-29T02:36:05-04:00->2026-09-29T16:09:38-04:00
  65. ~
    #1085856 2026-09-30 06:37 UTC
    Modified
    • source_updated_at
      2026-09-29T16:09:38-04:00->2026-09-30T02:35:55-04:00
  66. ~
    #1096142 2026-09-30 18:37 UTC
    Modified
    • source_updated_at
      2026-09-30T02:35:55-04:00->2026-09-30T14:36:45-04:00
  67. ~
    #1106071 2026-10-01 06:41 UTC
    Modified
    • source_updated_at
      2026-09-30T14:36:45-04:00->2026-10-01T02:36:12-04:00
  68. ~
    #1118244 2026-10-01 18:47 UTC
    Modified
    • source_updated_at
      2026-10-01T02:36:12-04:00->2026-10-01T14:36:26-04:00
  69. ~
    #1129654 2026-10-02 07:06 UTC
    Modified
    • source_updated_at
      2026-10-01T14:36:26-04:00->2026-10-02T02:36:44-04:00
  70. ~
    #1140552 2026-10-02 19:24 UTC
    Modified
    • source_updated_at
      2026-10-02T02:36:44-04:00->2026-10-02T14:37:12-04:00
  71. ~
    #1159807 2026-10-03 19:33 UTC
    Modified
    • source_updated_at
      2026-10-02T14:37:12-04:00->2026-10-03T14:36:12-04:00
  72. ~
    #1167574 2026-10-04 07:47 UTC
    Modified
    • source_updated_at
      2026-10-03T14:36:12-04:00->2026-10-04T02:36:21-04:00
  73. ~
    #1174057 2026-10-04 19:55 UTC
    Modified
    • source_updated_at
      2026-10-04T02:36:21-04:00->2026-10-04T14:36:14-04:00
  74. ~
    #1180265 2026-10-05 08:04 UTC
    Modified
    • source_updated_at
      2026-10-04T14:36:14-04:00->2026-10-05T02:36:22-04:00
  75. ~
    #1188674 2026-10-05 18:41 UTC
    Modified
    • source_updated_at
      2026-10-05T02:36:22-04:00->2026-10-05T14:37:35-04:00
  76. ~
    #1204123 2026-10-06 10:23 UTC
    Modified
    • source_updated_at
      2026-10-05T14:37:35-04:00->2026-10-06T02:36:50-04:00
  77. ~
    #1220378 2026-10-06 22:40 UTC
    Modified
    • source_updated_at
      2026-10-06T02:36:50-04:00->2026-10-06T14:37:53-04:00
  78. ~
    #1227032 2026-10-07 06:40 UTC
    Modified
    • source_updated_at
      2026-10-06T14:37:53-04:00->2026-10-07T02:36:49-04:00
  79. ~
    #1238219 2026-10-07 18:46 UTC
    Modified
    • source_updated_at
      2026-10-07T02:36:49-04:00->2026-10-07T14:37:34-04:00
  80. ~
    #1249363 2026-10-08 06:58 UTC
    Modified
    • source_updated_at
      2026-10-07T14:37:34-04:00->2026-10-08T02:37:06-04:00
  81. ~
    #1259741 2026-10-08 18:59 UTC
    Modified
    • source_updated_at
      2026-10-08T02:37:06-04:00->2026-10-08T14:38:06-04:00
  82. ~
    #1270687 2026-10-09 07:00 UTC
    Modified
    • source_updated_at
      2026-10-08T14:38:06-04:00->2026-10-09T02:37:39-04:00
  83. ~
    #1282932 2026-10-09 19:55 UTC
    Modified
    • source_updated_at
      2026-10-09T02:37:39-04:00->2026-10-09T14:37:59-04:00
  84. ~
    #1294851 2026-10-12 13:22 UTC
    Modified
    • source_updated_at
      2026-10-09T14:37:59-04:00->2026-10-12T02:37:37-04:00