AlignerrCoding & software eval
C++ Engineer - High Performance Computing (HPC)
up to $75/hr
About this role, in Alignerr's words
What if your mastery of C++ could directly shape the infrastructure powering the next generation of AI? We're looking for senior C++ engineers to build and optimize the high-performance systems that leading AI labs depend on — data pipelines, annotation tooling, evaluation infrastructure, and more.
What you'll do
- Design, build, and optimize high-performance C++ systems supporting AI data pipelines and evaluation workflows
- Develop full-stack tooling and backend services for large-scale data annotation, validation, and quality control
- Improve reliability, performance, and safety across production C++ codebases
Show all 6 itemsHide the other 3 in What you'll do
- Identify bottlenecks and edge cases in data and system behavior, then implement scalable, robust fixes
- Collaborate with data, research, and engineering teams to support model training and evaluation workflows
- Participate in synchronous design reviews to iterate on architecture and implementation decisions
Candidate background
Who You Are
- 5+ years of professional experience writing production-grade C++ — modern standards (C++17 or C++20) preferred
- Deep understanding of computer architecture, SIMD intrinsics, and cache coherency to optimize compute-heavy AI workloads
- Expert in lock-free programming and maximizing parallelism using threading libraries
- Full-stack developer background with a strong systems programming foundation
- Native or fluent English speaker with clear written and verbal communication skills
- Able to commit 20–40 hours per week consistently
Nice to Have
Show all 4 itemsHide these 4 items in Nice to Have
- Prior experience with data annotation, data quality, or evaluation systems
- Familiarity with AI/ML workflows, model training, or benchmarking pipelines
- Experience with distributed systems or developer tooling
- Background in HPC, game engines, or other performance-critical domains
Quoted from selected sections of Alignerr's posting. The full posting may state other conditions. Read the full posting
A closer look
More context, when you need it.
Full job descriptionThe original posting, in Alignerr's words
Posted by Alignerr, reproduced here so you can judge the role before clicking. Original posting ↗
C++ Engineer — High Performance Computing (HPC)
About the Role
What if your mastery of C++ could directly shape the infrastructure powering the next generation of AI? We're looking for senior C++ engineers to build and optimize the high-performance systems that leading AI labs depend on — data pipelines, annotation tooling, evaluation infrastructure, and more.
This is a fully remote, flexible contract role. If you live and breathe modern C++, care deeply about performance, and want your work to have real impact on cutting-edge AI research, this is the role for you.
- Organization: Alignerr - Type: Hourly Contract - Location: Remote - Commitment: 20–40 hours/week
What You'll Do
* Design, build, and optimize high-performance C++ systems supporting AI data pipelines and evaluation workflows * Develop full-stack tooling and backend services for large-scale data annotation, validation, and quality control * Improve reliability, performance, and safety across production C++ codebases * Identify bottlenecks and edge cases in data and system behavior, then implement scalable, robust fixes * Collaborate with data, research, and engineering teams to support model training and evaluation workflows * Participate in synchronous design reviews to iterate on architecture and implementation decisions
Who You Are
* 5+ years of professional experience writing production-grade C++ — modern standards (C++17 or C++20) preferred * Deep understanding of computer architecture, SIMD intrinsics, and cache coherency to optimize compute-heavy AI workloads * Expert in lock-free programming and maximizing parallelism using threading libraries * Full-stack developer background with a strong systems programming foundation * Native or fluent English speaker with clear written and verbal communication skills * Able to commit 20–40 hours per week consistently
Nice to Have
* Prior experience with data annotation, data quality, or evaluation systems * Familiarity with AI/ML workflows, model training, or benchmarking pipelines * Experience with distributed systems or developer tooling * Background in HPC, game engines, or other performance-critical domains
Why Join Us
* Work directly with leading AI labs on real production systems — not toy projects * Fully remote and flexible — work on your schedule, from anywhere * Freelance autonomy with the structure of meaningful, high-impact engineering work * Tackle genuinely hard technical problems at the frontier of AI infrastructure * Potential for ongoing work and contract extension as new projects launch
Working with AlignerrPay, getting started and work, from Alignerr's own pages
What the platform publishes in general. These are not extra terms confirmed for this particular role.
- Getting paid
- Billed weekly, Monday to Sunday, with approved work paid by the following Friday, according to Labelbox's help center. Payment goes through Stripe Connect or PayPal depending on your location, with one provider per country. intercom.help/labelbox/en/articles/13600616-alignerr-paym..., alignerr.com/process
- Before your first paid task
- Sign up, apply, verify your identity, set up billing and onboard. Some jobs add a Zara AI interview or domain assessments. alignerr.com/process
- How much work
- Time to your first project depends on demand and your skills, and there is no minimum number of hours. alignerr.com/faqs
- Contract
- Independent contractor, under terms with ALIGNERR LLC. alignerr.com/faqs, alignerr.com/privacy
Read on the pages linked above on 24 Sep 2026. Platforms change these terms, so check the linked page before you rely on one.
How does the pay compare?Across Coding & software eval roles, not this role alone
From our own daily reads of every open listing on the platforms we follow, not from Alignerr's posting. How we count.
Pay across the field: Coding & software eval
Across 393 roles in this field with a stated hourly rate in US dollars, on 14 platforms, the middle half pays $65 to $120 an hour at the top of the range, and the median is $95. This role's top rate, $75, is in the middle half. Of the 141 distinct rates we count, 45 are lower and 92 are higher.
| Platform | Roles | Top of range, per hour |
|---|---|---|
| Alignerr (this platform) | 136 | $50 to $400 · median $100 |
| micro1 | 46 | $35 to $350 · median $110 |
| Handshake AI | 43 | $47 to $125 · median $80 |
| Meridial (Invisible) | 34 | $22 to $150 · median $60 |
| Mercor | 33 | $60 to $200 · median $105 |
Sources and listing historyWhere this information comes from
This listing's history
- First seen here on 27 Aug 2026, and still on Alignerr's list when we last read it on 13 Oct 2026.
- The listed pay has not changed since then.
- Posted by Alignerr
- First seen by AIPayList
- Last seen live
- Listing ID
- 21f1b165-1389-4888-80fa-fcc4f4815046
Pay as the source states it: “$50-75/hr”.
Platforms sometimes change a rate after posting. Every listing here is re-read at least once a day and corrected when its source moves, so a difference you see on the platform is usually a change made since the last read. How freshness works.
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