AlignerrCoding & software eval
Backend Developer - Data Annotation Systems
up to $75/hr
About this role, in Alignerr's words
What if your Python expertise could directly shape the infrastructure behind the world's most advanced AI models? We're looking for a Senior Python Full-Stack Engineer to build and optimize the data pipelines, annotation tooling, and evaluation systems that leading AI labs depend on to train and improve next-generation models.
What you'll do
- Design, build, and optimize high-performance Python systems supporting large-scale AI data pipelines and evaluation workflows
- Develop full-stack backend tooling and services for data annotation, validation, and quality control at scale
- Build and maintain asynchronous task queues to handle long-running background jobs reliably
Show all 8 itemsHide the other 5 in What you'll do
- Optimize database queries for high-read/write workloads and serve data via real-time protocols such as WebSockets
- Improve reliability, performance, and robustness across existing Python codebases
- Identify bottlenecks and edge cases in data and system behavior, and implement scalable, production-ready fixes
- Collaborate closely with data, research, and engineering teams to support model training and evaluation workflows
- Participate in synchronous design reviews to iterate on system architecture and implementation decisions
Candidate background
Who You Are
- Strong full-stack developer with a solid systems programming background
- 3–5+ years of professional experience writing production-grade Python
- Experienced building asynchronous task queues for long-running background processing
- Proficient in optimizing database queries for high-throughput applications
- Comfortable working with real-time data protocols (e.g., WebSockets)
- Clear, precise written and verbal communicator
- Able to commit 20–40 hours per week consistently
- Native or fluent English speaker
Nice to Have
Show all 4 itemsHide these 4 items in Nice to Have
- Prior experience with data annotation platforms, data quality systems, or evaluation pipelines
- Familiarity with AI/ML workflows, model training, or benchmarking infrastructure
- Experience with distributed systems or developer tooling
- Background working alongside research or data science teams
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 ↗
Backend Developer — Data Annotation Systems (AI Infrastructure)
About the Role
What if your Python expertise could directly shape the infrastructure behind the world's most advanced AI models? We're looking for a Senior Python Full-Stack Engineer to build and optimize the data pipelines, annotation tooling, and evaluation systems that leading AI labs depend on to train and improve next-generation models.
This is a fully remote, flexible contract role for an experienced engineer who wants to work on real production systems with meaningful impact — not toy projects.
- Organization: Alignerr - Type: Hourly Contract - Location: Remote - Commitment: 20–40 hours/week
What You'll Do
* Design, build, and optimize high-performance Python systems supporting large-scale AI data pipelines and evaluation workflows * Develop full-stack backend tooling and services for data annotation, validation, and quality control at scale * Build and maintain asynchronous task queues to handle long-running background jobs reliably * Optimize database queries for high-read/write workloads and serve data via real-time protocols such as WebSockets * Improve reliability, performance, and robustness across existing Python codebases * Identify bottlenecks and edge cases in data and system behavior, and implement scalable, production-ready fixes * Collaborate closely with data, research, and engineering teams to support model training and evaluation workflows * Participate in synchronous design reviews to iterate on system architecture and implementation decisions
Who You Are
* Strong full-stack developer with a solid systems programming background * 3–5+ years of professional experience writing production-grade Python * Experienced building asynchronous task queues for long-running background processing * Proficient in optimizing database queries for high-throughput applications * Comfortable working with real-time data protocols (e.g., WebSockets) * Clear, precise written and verbal communicator * Able to commit 20–40 hours per week consistently * Native or fluent English speaker
Nice to Have
* Prior experience with data annotation platforms, data quality systems, or evaluation pipelines * Familiarity with AI/ML workflows, model training, or benchmarking infrastructure * Experience with distributed systems or developer tooling * Background working alongside research or data science teams
Why Join Us
* Work directly with leading AI labs on production systems that matter * Fully remote and flexible — work from anywhere on a schedule that suits you * Freelance autonomy with the structure of high-quality, technically challenging work * Contribute to AI infrastructure that influences how next-generation models are built and evaluated * 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 391 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 140 distinct rates we count, 44 are lower and 92 are higher.
| Platform | Roles | Top of range, per hour |
|---|---|---|
| Alignerr (this platform) | 136 | $50 to $400 · median $100 |
| micro1 | 44 | $60 to $350 · median $120 |
| 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
- 20b9e86e-f3f8-4078-a8d8-b0283f4bdebe
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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