jobctl

Principal Model Optimization Engineer

Roblox - San Mateo, CA, United States - original posting ->
Status
Open
Remote policy
Not stated
Employment type
Not stated
Salary
295,250-345,040 USD / year
Categories
Software Engineering
Tech
softwareprincipal
Source
roblox
First observed
2026-08-11 23:51 UTC
Last seen
2026-09-29 22:36 UTC
Source claims posted
2026-05-05 18:13 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.

ML Platform @ Roblox today supports hundreds of ML use cases and billions of inferences per day across Discovery, Safety, Engine, and much more. As a Model Optimization engineer on ML Platform, you will be responsible for digging deep into model internals to optimize performance, for both training and inference. We are looking for accomplished engineers to help us maximize performance of our platform.

You Will:

Optimize machine learning models for performance on GPU architectures, focusing on both training and inference workflows.

Conduct low-level performance profiling analysis to identify bottlenecks in existing machine learning pipelines and propose actionable improvements.

Contribute to the development of best practices and tooling for model optimization and deployment.

Collaborate with cross-functional teams, including data scientists and software engineers, to integrate and deploy optimized models into production environments.

Partner across organizations to build tooling, interfaces, and visualizations that make the ML@Roblox a delight to use.

You Have:

6+ years of professional experience and a tool chest of system design experience upon which to draw to build performant systems for all of Roblox.

Have significant experience debugging GPUs - reading GPU profiles, debugging Xid errors, etc.

Proficient in advanced tools and frameworks (e.g., CUDA, Triton, TensorRT) to enhance model execution speed and reduce latency.

Experience with model optimization techniques for LLMs, such as speculative decoding, continuous batching, quantization, etc.

A performance nut; you love pushing the limits of what’s possible, whether it’s squeezing every last ounce of efficiency from a GPU, fine-tuning algorithms for peak speed, or innovating new techniques to enhance model performance

A generalization advocate: you're passionate about building tools and frameworks that consistently deliver improvements in model performance.

Passionate about supporting internal partners (data scientists and ML Engineers) to meet and understand their needs.

A Bachelor's degree in Computer Science, Computer Engineering, Data Science, or a similar technical field.

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

$295,250—$345,040 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 93 observation(s).

Timeline

  1. *
    #12519 2026-08-11 23:51 UTC
    Published
  2. ~
    #17857 2026-08-12 07:51 UTC
    Modified
    • source_updated_at
      2026-08-11T14:41:08-04:00->2026-08-12T02:39:58-04:00
  3. ~
    #28523 2026-08-12 19:51 UTC
    Modified
    • source_updated_at
      2026-08-12T02:39:58-04:00->2026-08-12T14:42:38-04:00
  4. ~
    #40947 2026-08-13 07:52 UTC
    Modified
    • source_updated_at
      2026-08-12T14:42:38-04:00->2026-08-13T02:43:47-04:00
  5. ~
    #51541 2026-08-13 19:53 UTC
    Modified
    • source_updated_at
      2026-08-13T02:43:47-04:00->2026-08-13T14:44:45-04:00
  6. ~
    #59965 2026-08-14 07:54 UTC
    Modified
    • source_updated_at
      2026-08-13T14:44:45-04:00->2026-08-14T02:40:41-04:00
  7. ~
    #70244 2026-08-14 19:55 UTC
    Modified
    • source_updated_at
      2026-08-14T02:40:41-04:00->2026-08-14T14:43:33-04:00
  8. ~
    #91738 2026-08-15 19:55 UTC
    Modified
    • source_updated_at
      2026-08-14T14:43:33-04:00->2026-08-15T14:42:22-04:00
  9. ~
    #102179 2026-08-16 07:55 UTC
    Modified
    • source_updated_at
      2026-08-15T14:42:22-04:00->2026-08-16T02:39:48-04:00
  10. ~
    #113683 2026-08-16 19:56 UTC
    Modified
    • source_updated_at
      2026-08-16T02:39:48-04:00->2026-08-16T14:45:37-04:00
  11. ~
    #124068 2026-08-17 07:56 UTC
    Modified
    • source_updated_at
      2026-08-16T14:45:37-04:00->2026-08-17T02:40:43-04:00
  12. ~
    #136356 2026-08-17 19:42 UTC
    Modified
    • source_updated_at
      2026-08-17T02:40:43-04:00->2026-08-17T14:43:55-04:00
  13. ~
    #146896 2026-08-18 09:17 UTC
    Modified
    • source_updated_at
      2026-08-17T14:43:55-04:00->2026-08-18T02:40:43-04:00
  14. ~
    #159453 2026-08-18 21:00 UTC
    Modified
    • source_updated_at
      2026-08-18T02:40:43-04:00->2026-08-18T14:42:42-04:00
  15. ~
    #172783 2026-08-19 07:53 UTC
    Modified
    • source_updated_at
      2026-08-18T14:42:42-04:00->2026-08-19T02:43:27-04:00
  16. ~
    #193575 2026-08-19 19:27 UTC
    Modified
    • source_updated_at
      2026-08-19T02:43:27-04:00->2026-08-19T14:43:39-04:00
  17. ~
    #206535 2026-08-20 07:36 UTC
    Modified
    • source_updated_at
      2026-08-19T14:43:39-04:00->2026-08-20T02:44:03-04:00
  18. ~
    #223283 2026-08-20 20:23 UTC
    Modified
    • source_updated_at
      2026-08-20T02:44:03-04:00->2026-08-20T14:45:47-04:00
  19. ~
    #235040 2026-08-21 06:53 UTC
    Modified
    • source_updated_at
      2026-08-20T14:45:47-04:00->2026-08-21T02:42:12-04:00
  20. ~
    #254625 2026-08-21 19:50 UTC
    Modified
    • source_updated_at
      2026-08-21T02:42:12-04:00->2026-08-21T14:43:24-04:00
  21. ~
    #258848 2026-08-21 23:52 UTC
    Modified
    • source_updated_at
      2026-08-21T14:43:24-04:00->2026-08-21T16:08:02-04:00
  22. ~
    #281613 2026-08-22 21:12 UTC
    Modified
    • source_updated_at
      2026-08-21T16:08:02-04:00->2026-08-22T14:41:52-04:00
  23. ~
    #293300 2026-08-23 09:44 UTC
    Modified
    • source_updated_at
      2026-08-22T14:41:52-04:00->2026-08-23T02:40:11-04:00
  24. ~
    #303360 2026-08-23 21:11 UTC
    Modified
    • source_updated_at
      2026-08-23T02:40:11-04:00->2026-08-23T14:41:41-04:00
  25. ~
    #318492 2026-08-24 07:30 UTC
    Modified
    • source_updated_at
      2026-08-23T14:41:41-04:00->2026-08-24T02:41:13-04:00
  26. ~
    #338538 2026-08-24 22:19 UTC
    Modified
    • source_updated_at
      2026-08-24T02:41:13-04:00->2026-08-24T14:45:56-04:00
  27. ~
    #354314 2026-08-25 10:19 UTC
    Modified
    • source_updated_at
      2026-08-24T14:45:56-04:00->2026-08-25T02:41:37-04:00
  28. ~
    #363970 2026-08-25 19:02 UTC
    Modified
    • source_updated_at
      2026-08-25T02:41:37-04:00->2026-08-25T14:42:54-04:00
  29. ~
    #377545 2026-08-26 07:20 UTC
    Modified
    • source_updated_at
      2026-08-25T14:42:54-04:00->2026-08-26T02:41:22-04:00
  30. ~
    #387876 2026-08-26 22:35 UTC
    Modified
    • source_updated_at
      2026-08-26T02:41:22-04:00->2026-08-26T14:43:10-04:00
  31. ~
    #396914 2026-08-27 10:36 UTC
    Modified
    • source_updated_at
      2026-08-26T14:43:10-04:00->2026-08-27T02:42:48-04:00
  32. ~
    #407098 2026-08-27 22:36 UTC
    Modified
    • source_updated_at
      2026-08-27T02:42:48-04:00->2026-08-27T14:43:32-04:00
  33. ~
    #416820 2026-08-28 10:36 UTC
    Modified
    • source_updated_at
      2026-08-27T14:43:32-04:00->2026-08-28T02:43:05-04:00
  34. ~
    #429410 2026-08-28 23:17 UTC
    Modified
    • source_updated_at
      2026-08-28T02:43:05-04:00->2026-08-28T14:43:04-04:00
  35. ~
    #442092 2026-08-29 19:06 UTC
    Modified
    • source_updated_at
      2026-08-28T14:43:04-04:00->2026-08-29T14:40:33-04:00
  36. ~
    #456648 2026-08-30 07:48 UTC
    Modified
    • source_updated_at
      2026-08-29T14:40:33-04:00->2026-08-30T02:42:00-04:00
  37. ~
    #469420 2026-08-30 21:41 UTC
    Modified
    • source_updated_at
      2026-08-30T02:42:00-04:00->2026-08-30T14:40:04-04:00
  38. ~
    #477668 2026-08-31 09:19 UTC
    Modified
    • source_updated_at
      2026-08-30T14:40:04-04:00->2026-08-31T02:41:16-04:00
  39. ~
    #487419 2026-08-31 21:23 UTC
    Modified
    • source_updated_at
      2026-08-31T02:41:16-04:00->2026-08-31T14:41:27-04:00
  40. ~
    #496889 2026-09-01 09:23 UTC
    Modified
    • source_updated_at
      2026-08-31T14:41:27-04:00->2026-09-01T02:40:06-04:00
  41. ~
    #509142 2026-09-01 21:24 UTC
    Modified
    • source_updated_at
      2026-09-01T02:40:06-04:00->2026-09-01T14:41:33-04:00
  42. ~
    #523877 2026-09-02 09:24 UTC
    Modified
    • source_updated_at
      2026-09-01T14:41:33-04:00->2026-09-02T02:41:06-04:00
  43. ~
    #535514 2026-09-02 21:25 UTC
    Modified
    • source_updated_at
      2026-09-02T02:41:06-04:00->2026-09-02T14:42:12-04:00
  44. ~
    #547192 2026-09-03 09:25 UTC
    Modified
    • source_updated_at
      2026-09-02T14:42:12-04:00->2026-09-03T02:40:33-04:00
  45. ~
    #556730 2026-09-03 21:26 UTC
    Modified
    • source_updated_at
      2026-09-03T02:40:33-04:00->2026-09-03T14:42:39-04:00
  46. ~
    #567700 2026-09-04 09:26 UTC
    Modified
    • source_updated_at
      2026-09-03T14:42:39-04:00->2026-09-04T02:41:04-04:00
  47. ~
    #578393 2026-09-04 21:31 UTC
    Modified
    • source_updated_at
      2026-09-04T02:41:04-04:00->2026-09-04T14:42:13-04:00
  48. ~
    #592765 2026-09-05 19:42 UTC
    Modified
    • source_updated_at
      2026-09-04T14:42:13-04:00->2026-09-05T14:40:54-04:00
  49. ~
    #599338 2026-09-06 07:43 UTC
    Modified
    • source_updated_at
      2026-09-05T14:40:54-04:00->2026-09-06T02:40:07-04:00
  50. ~
    #606945 2026-09-06 19:43 UTC
    Modified
    • source_updated_at
      2026-09-06T02:40:07-04:00->2026-09-06T14:41:08-04:00
  51. ~
    #613176 2026-09-07 07:46 UTC
    Modified
    • source_updated_at
      2026-09-06T14:41:08-04:00->2026-09-07T02:40:47-04:00
  52. ~
    #623023 2026-09-07 19:47 UTC
    Modified
    • source_updated_at
      2026-09-07T02:40:47-04:00->2026-09-07T14:40:10-04:00
  53. ~
    #631444 2026-09-08 07:47 UTC
    Modified
    • source_updated_at
      2026-09-07T14:40:10-04:00->2026-09-08T02:41:15-04:00
  54. ~
    #641863 2026-09-08 19:49 UTC
    Modified
    • source_updated_at
      2026-09-08T02:41:15-04:00->2026-09-08T14:42:32-04:00
  55. ~
    #651398 2026-09-09 07:49 UTC
    Modified
    • source_updated_at
      2026-09-08T14:42:32-04:00->2026-09-09T02:41:35-04:00
  56. ~
    #662920 2026-09-09 19:54 UTC
    Modified
    • source_updated_at
      2026-09-09T02:41:35-04:00->2026-09-09T14:42:41-04:00
  57. ~
    #672861 2026-09-10 07:54 UTC
    Modified
    • source_updated_at
      2026-09-09T14:42:41-04:00->2026-09-10T02:41:39-04:00
  58. ~
    #685627 2026-09-10 19:55 UTC
    Modified
    • source_updated_at
      2026-09-10T02:41:39-04:00->2026-09-10T14:41:55-04:00
  59. ~
    #694347 2026-09-11 07:56 UTC
    Modified
    • source_updated_at
      2026-09-10T14:41:55-04:00->2026-09-11T02:40:40-04:00
  60. ~
    #706677 2026-09-11 21:18 UTC
    Modified
    • source_updated_at
      2026-09-11T02:40:40-04:00->2026-09-11T14:42:10-04:00
  61. ~
    #720038 2026-09-12 21:19 UTC
    Modified
    • source_updated_at
      2026-09-11T14:42:10-04:00->2026-09-12T14:41:14-04:00
  62. ~
    #726888 2026-09-13 09:19 UTC
    Modified
    • source_updated_at
      2026-09-12T14:41:14-04:00->2026-09-13T02:40:56-04:00
  63. ~
    #733300 2026-09-13 21:19 UTC
    Modified
    • source_updated_at
      2026-09-13T02:40:56-04:00->2026-09-13T14:41:04-04:00
  64. ~
    #740230 2026-09-14 09:28 UTC
    Modified
    • source_updated_at
      2026-09-13T14:41:04-04:00->2026-09-14T02:41:10-04:00
  65. ~
    #753254 2026-09-14 21:29 UTC
    Modified
    • source_updated_at
      2026-09-14T02:41:10-04:00->2026-09-14T14:41:48-04:00
  66. ~
    #764799 2026-09-15 09:29 UTC
    Modified
    • source_updated_at
      2026-09-14T14:41:48-04:00->2026-09-15T02:41:34-04:00
  67. ~
    #777442 2026-09-15 21:30 UTC
    Modified
    • source_updated_at
      2026-09-15T02:41:34-04:00->2026-09-15T14:42:09-04:00
  68. ~
    #788178 2026-09-16 09:30 UTC
    Modified
    • source_updated_at
      2026-09-15T14:42:09-04:00->2026-09-16T02:41:37-04:00
  69. ~
    #800567 2026-09-16 21:31 UTC
    Modified
    • source_updated_at
      2026-09-16T02:41:37-04:00->2026-09-16T14:42:15-04:00
  70. ~
    #810806 2026-09-17 09:32 UTC
    Modified
    • source_updated_at
      2026-09-16T14:42:15-04:00->2026-09-17T02:42:26-04:00
  71. ~
    #820401 2026-09-17 21:32 UTC
    Modified
    • source_updated_at
      2026-09-17T02:42:26-04:00->2026-09-17T14:42:15-04:00
  72. ~
    #830746 2026-09-18 09:36 UTC
    Modified
    • source_updated_at
      2026-09-17T14:42:15-04:00->2026-09-18T02:41:37-04:00
  73. ~
    #846968 2026-09-18 21:37 UTC
    Modified
    • source_updated_at
      2026-09-18T02:41:37-04:00->2026-09-18T14:42:35-04:00
  74. ~
    #867243 2026-09-19 21:38 UTC
    Modified
    • source_updated_at
      2026-09-18T14:42:35-04:00->2026-09-19T14:41:01-04:00
  75. ~
    #874539 2026-09-20 09:39 UTC
    Modified
    • source_updated_at
      2026-09-19T14:41:01-04:00->2026-09-20T02:40:49-04:00
  76. ~
    #882259 2026-09-20 21:40 UTC
    Modified
    • source_updated_at
      2026-09-20T02:40:49-04:00->2026-09-20T14:40:36-04:00
  77. ~
    #889145 2026-09-21 09:49 UTC
    Modified
    • source_updated_at
      2026-09-20T14:40:36-04:00->2026-09-21T02:41:08-04:00
  78. ~
    #905659 2026-09-21 21:49 UTC
    Modified
    • source_updated_at
      2026-09-21T02:41:08-04:00->2026-09-21T14:42:01-04:00
  79. ~
    #918914 2026-09-22 09:53 UTC
    Modified
    • source_updated_at
      2026-09-21T14:42:01-04:00->2026-09-22T02:41:39-04:00
  80. ~
    #930445 2026-09-22 21:53 UTC
    Modified
    • source_updated_at
      2026-09-22T02:41:39-04:00->2026-09-22T14:43:25-04:00
  81. ~
    #941256 2026-09-23 09:54 UTC
    Modified
    • source_updated_at
      2026-09-22T14:43:25-04:00->2026-09-23T02:41:52-04:00
  82. ~
    #956806 2026-09-23 21:54 UTC
    Modified
    • source_updated_at
      2026-09-23T02:41:52-04:00->2026-09-23T14:42:49-04:00
  83. ~
    #967333 2026-09-24 09:59 UTC
    Modified
    • source_updated_at
      2026-09-23T14:42:49-04:00->2026-09-24T02:42:46-04:00
  84. ~
    #980352 2026-09-24 22:03 UTC
    Modified
    • source_updated_at
      2026-09-24T02:42:46-04:00->2026-09-24T14:42:30-04:00
  85. ~
    #994311 2026-09-25 10:08 UTC
    Modified
    • source_updated_at
      2026-09-24T14:42:30-04:00->2026-09-25T02:41:18-04:00
  86. ~
    #1007631 2026-09-25 22:13 UTC
    Modified
    • source_updated_at
      2026-09-25T02:41:18-04:00->2026-09-25T14:42:37-04:00
  87. ~
    #1023073 2026-09-26 22:19 UTC
    Modified
    • source_updated_at
      2026-09-25T14:42:37-04:00->2026-09-26T14:41:35-04:00
  88. ~
    #1029681 2026-09-27 10:19 UTC
    Modified
    • source_updated_at
      2026-09-26T14:41:35-04:00->2026-09-27T02:40:54-04:00
  89. ~
    #1036690 2026-09-27 22:19 UTC
    Modified
    • source_updated_at
      2026-09-27T02:40:54-04:00->2026-09-27T14:41:09-04:00
  90. ~
    #1043898 2026-09-28 10:25 UTC
    Modified
    • source_updated_at
      2026-09-27T14:41:09-04:00->2026-09-28T02:41:57-04:00
  91. ~
    #1054451 2026-09-28 22:26 UTC
    Modified
    • source_updated_at
      2026-09-28T02:41:57-04:00->2026-09-28T14:42:14-04:00
  92. ~
    #1063599 2026-09-29 10:34 UTC
    Modified
    • source_updated_at
      2026-09-28T14:42:14-04:00->2026-09-29T02:42:15-04:00
  93. ~
    #1077301 2026-09-29 22:36 UTC
    Modified
    • source_updated_at
      2026-09-29T02:42:15-04:00->2026-09-29T16:09:38-04:00