Is this job worth applying to?

Pay

Below typicalTops out at $75/hr. The typical top rate across 237 priced coding listings is $90/hr.

Getting in

Hard to get in~1–2 hours of assessments. Valid government photo ID.

Steady work

Work is patchyFeast-or-famine project volume.

Payout record

Some delaysSchedule: weekly, by Friday for the prior Monday–Sunday. Paid via Stripe or PayPal (depends on country).

Freshness

RecentPosted 2w ago. Still listed on Alignerr on Nov 6, 2026.

Where you live

Not statedThe listing names no country.

The job description

About the Role

What if your C++ expertise could directly shape the infrastructure that powers the world's most advanced AI systems? We're looking for a Senior C++ Full-Stack Engineer to build and optimize the high-performance tooling, data pipelines, and evaluation systems that leading AI labs depend on every day.

This is a fully remote contract role working on real production systems — not toy projects. You'll collaborate with data, research, and engineering teams at the frontier of AI development, tackling genuinely hard systems problems with meaningful impact.

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
Profile and refactor existing C++ codebases to eliminate bottlenecks and improve reliability, performance, and safety
Embed scripting languages within C++ applications to create flexible, extensible internal tools
Identify edge cases and failure modes in complex data and system behavior — then implement scalable fixes
Collaborate with research and engineering teams to align tooling with model training and evaluation needs
Participate in synchronous design reviews to iterate on system architecture and implementation decisions

Who You Are

3–5+ years of professional experience writing production-grade C++
Strong full-stack developer background with a deep systems programming foundation
Experienced at embedding scripting languages (Python, Lua, etc.) within C++ applications to build flexible tooling
Skilled at profiling and optimizing data processing pipelines — you know where the slowdowns hide
Clear, confident communicator in written and verbal English
Self-directed and reliable — you can deliver quality work with minimal hand-holding
Able to commit 20–40 hours per week on a consistent basis

Nice to Have

Prior experience with data annotation, data quality pipelines, or evaluation systems
Familiarity with AI/ML workflows, model training infrastructure, or benchmarking pipelines
Experience with distributed systems, developer tooling, or internal platform engineering
Background contributing to or reviewing large, long-lived C++ codebases

Why Join Us

Work directly on cutting-edge AI infrastructure alongside leading research labs
Fully remote and async-friendly — work from wherever you do your best work
Freelance autonomy paired with meaningful, technically challenging assignments
Make a tangible impact on the systems that train and evaluate next-generation AI models
Potential for ongoing work and contract extension as new projects launch

How do you apply to Alignerr?

Apply on Alignerr

The Apply button opens this post on Alignerr's own site. You apply with them, not with Rubric. Budget about 1–2 hours of assessments.

Get through screening

What Alignerr asks for after you apply:

Take the TestGorilla skills assessment (usually one attempt per role)
Verify your identity with Persona
Join the Alignerr Slack community
Set up payouts once you are assigned to a project

Start work and get paid

Pay schedule: weekly, by Friday for the prior Monday–Sunday. Paid via Stripe or PayPal (depends on country). You're paid for the work they hand out, not a fixed salary.

Alignerr also needs

Valid government photo ID
Degree or professional experience for expert roles
Webcam for proctored assessments on some roles

Red flags

Red flagLong gaps with no project after passing
Red flagWorker reports of delayed or withheld payments on Glassdoor

What is Alignerr like to work for?

Labelbox's contractor network, which hires generalists and domain experts to label data and write and grade AI training tasks.

Advertised pay	$15–150/hr
Getting in	Hard to get in
Application takes	~1–2 hours of assessments
How you get paid	Weekly, by Friday for the prior Monday–Sunday, via Stripe or PayPal (depends on country)
Payout record	Some delays
Countries	Accepts most countries but blocks signups from about two dozen; posts India-specific roles such as Hindi, Telugu and Indian-English language and cultural review work.

Generalist and bilingual work is around $15–20/hr, coding QA $30–40/hr, and senior software, advanced math, medical and law roles $70–150/hr; some projects pay per approved task.