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 powering the world's most advanced AI systems? We're looking for a Senior C# 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 at the frontier of AI — not just maintain legacy code, but architect meaningful infrastructure that matters.

What You'll Do

Design, build, and optimize high-performance C# systems that support 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 existing C# codebases used in production AI environments
Collaborate closely with data, research, and engineering teams to support model training and evaluation workflows
Identify bottlenecks and edge cases in data and system behavior — then implement scalable, robust fixes
Participate in synchronous design reviews to iterate on architecture and implementation decisions

Who You Are

Full-stack developer with a strong systems programming background and deep command of C#
3–5+ years of professional experience writing production-grade C# code, with familiarity with modern standards
Solid grounding in performance optimization, concurrency (threading, atomics), and memory safety
Native or fluent English speaker with clear written and verbal communication skills
Self-directed and reliable — able to commit 20–40 hours per week and deliver consistently without hand-holding
Comfortable navigating complex codebases and making principled architectural decisions under real constraints

Nice to Have

Prior experience with data annotation platforms, data quality systems, or evaluation infrastructure
Familiarity with AI/ML workflows, model training pipelines, or benchmarking systems
Experience building distributed systems or developer tooling at scale
Background working alongside research or applied AI teams

Why Join Us

Work at the frontier of AI — your code will directly influence how the world's leading models are built and evaluated
Fully remote and flexible — structure your hours around your life, not the other way around
Collaborate with world-class research and engineering teams on genuinely hard problems
Freelance autonomy with the substance of high-impact, technically demanding work
Potential for ongoing work and contract extension as projects evolve and expand

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.