... build prototypes that scale into the reliable systems, and are at the frontier of agent-first ... The systems behind hundreds of thousands of AI interviews used to source and match freelance ...
... build prototypes that scale into the reliable systems, and are at the frontier of agent-first ... The systems behind hundreds of thousands of AI interviews used to source and match freelance ...
UX/UI Designer
Cincinnati, OH · On-site
... interactive prototypes) for internal reviews. * Ensures that graphics and programming aspects ... Light Brand Guidelines experience P&G's freelancer opportunities are for project-based or other ...
UX/UI Designer
Cincinnati, OH · On-site
... interactive prototypes) for internal reviews. * Ensures that graphics and programming aspects ... Light Brand Guidelines experience P&G's freelancer opportunities are for project-based or other ...
UX/UI DesignerFlexible
Cincinnati, OH · On-site
... prototypes) for internal reviews. Ensures that graphics and programming aspects follow the tenets ... Successful candidates for freelancer opportunities will not be considered employees of The Procter ...
UX/UI DesignerFlexible
Cincinnati, OH · On-site
... prototypes) for internal reviews. Ensures that graphics and programming aspects follow the tenets ... Successful candidates for freelancer opportunities will not be considered employees of The Procter ...
... prototypes) for internal reviews. Ensures that graphics and programming aspects follow the tenets ... Successful candidates for freelancer opportunities will not be considered employees of The Procter ...
... prototypes) for internal reviews. Ensures that graphics and programming aspects follow the tenets ... Successful candidates for freelancer opportunities will not be considered employees of The Procter ...
... prototypes) for internal reviews. Ensures that graphics and programming aspects follow the tenets ... Successful candidates for freelancer opportunities will not be considered employees of The Procter ...
... prototypes) for internal reviews. Ensures that graphics and programming aspects follow the tenets ... Successful candidates for freelancer opportunities will not be considered employees of The Procter ...
CNC Machinist/Programmer
Houston, TX · On-site
$25.25 - $34.50/hr
... and Freelance Recruiters. We have strong relationships with IT services companies focussed on ... a-kind complex prototypes on a variety of materials. * This person must also be capable of ...
CNC Machinist/Programmer
Houston, TX · On-site
$25.25 - $34.50/hr
... and Freelance Recruiters. We have strong relationships with IT services companies focussed on ... a-kind complex prototypes on a variety of materials. * This person must also be capable of ...
CNC Machinist/Programmer
$25.25 - $34.50/hr
... and Freelance Recruiters. We have strong relationships with IT services companies focussed on ... a-kind complex prototypes on a variety of materials. * This person must also be capable of ...
CNC Machinist/Programmer
$25.25 - $34.50/hr
... and Freelance Recruiters. We have strong relationships with IT services companies focussed on ... a-kind complex prototypes on a variety of materials. * This person must also be capable of ...
GROWTH ENGINEER- Life Science
San Carlos, CA · On-site
$100 - $115/hr
Internships, co-ops, student ventures, research projects, freelance work, and substantial portfolio ... Prototype and launch campaigns, content, digital experiences, and internal tools that test growth ...
GROWTH ENGINEER- Life Science
San Carlos, CA · On-site
$100 - $115/hr
Internships, co-ops, student ventures, research projects, freelance work, and substantial portfolio ... Prototype and launch campaigns, content, digital experiences, and internal tools that test growth ...
GROWTH ENGINEER- Life Science
San Carlos, CA · On-site
$100K - $115K/yr
Internships, co-ops, student ventures, research projects, freelance work, and substantial portfolio ... Prototype and launch campaigns, content, digital experiences, and internal tools that test growth ...
Quick apply
GROWTH ENGINEER- Life Science
San Carlos, CA · On-site
$100K - $115K/yr
Internships, co-ops, student ventures, research projects, freelance work, and substantial portfolio ... Prototype and launch campaigns, content, digital experiences, and internal tools that test growth ...
GROWTH ENGINEER- Life Science
San Carlos, CA · On-site
$100 - $115/hr
Internships, co‑ops, student ventures, research projects, freelance work, and substantial ... Prototype and launch campaigns, content, digital experiences, and internal tools that test growth ...
GROWTH ENGINEER- Life Science
San Carlos, CA · On-site
$100 - $115/hr
Internships, co‑ops, student ventures, research projects, freelance work, and substantial ... Prototype and launch campaigns, content, digital experiences, and internal tools that test growth ...
GROWTH ENGINEER- Life Science
San Carlos, CA · On-site
$100K - $115K/yr
Internships, co-ops, student ventures, research projects, freelance work, and substantial portfolio ... Prototype and launch campaigns, content, digital experiences, and internal tools that test growth ...
GROWTH ENGINEER- Life Science
San Carlos, CA · On-site
$100K - $115K/yr
Internships, co-ops, student ventures, research projects, freelance work, and substantial portfolio ... Prototype and launch campaigns, content, digital experiences, and internal tools that test growth ...
Senior Software Engineer
Manhattan, NY · On-site
$87K - $137K/yr
Rapid prototype novel audience intelligence or ad tech concepts for new business pitches; evolve ... Temporary roles may be eligible to participate in our freelancer/temporary employee medical plan ...
Senior Software Engineer
Manhattan, NY · On-site
$87K - $137K/yr
Rapid prototype novel audience intelligence or ad tech concepts for new business pitches; evolve ... Temporary roles may be eligible to participate in our freelancer/temporary employee medical plan ...
AI Engineer/Anthropic-Campus Hire - US West
OR · On-site +1
Develop prototypes and proof-of-concepts using generative AI, large language models (LLMs ... freelance work, academic projects, or professional roles. * Experience with one or more programming ...
AI Engineer/Anthropic-Campus Hire - US West
OR · On-site +1
Develop prototypes and proof-of-concepts using generative AI, large language models (LLMs ... freelance work, academic projects, or professional roles. * Experience with one or more programming ...
Develop prototypes and proof-of-concepts using generative AI, large language models (LLMs ... freelance work, academic projects, or professional roles. * Experience with one or more programming ...
Develop prototypes and proof-of-concepts using generative AI, large language models (LLMs ... freelance work, academic projects, or professional roles. * Experience with one or more programming ...
Senior Software Engineer
Manhattan, NY · On-site
$87K - $137K/yr
Rapid prototype novel audience intelligence or ad tech concepts for new business pitches; evolve ... Temporary roles may be eligible to participate in our freelancer/temporary employee medical plan ...
Senior Software Engineer
Manhattan, NY · On-site
$87K - $137K/yr
Rapid prototype novel audience intelligence or ad tech concepts for new business pitches; evolve ... Temporary roles may be eligible to participate in our freelancer/temporary employee medical plan ...
Fullstack Engineer
Manhattan, NY · On-site
$100 - $130/hr
Prototype quickly, validate ideas, and iterate based on user feedback * Bring design intuition to ... Have some product management, founder, or freelance experience * Enjoy debating architecture ...
Fullstack Engineer
Manhattan, NY · On-site
$100 - $130/hr
Prototype quickly, validate ideas, and iterate based on user feedback * Bring design intuition to ... Have some product management, founder, or freelance experience * Enjoy debating architecture ...
Fullstack Engineer
San Francisco, CA · On-site
$100 - $130/hr
Prototype quickly, validate ideas, and iterate based on user feedback * Bring design intuition to ... Have some product management, founder, or freelance experience * Enjoy debating architecture ...
Fullstack Engineer
San Francisco, CA · On-site
$100 - $130/hr
Prototype quickly, validate ideas, and iterate based on user feedback * Bring design intuition to ... Have some product management, founder, or freelance experience * Enjoy debating architecture ...
$55 - $75/hr
C2C / freelance * Location: Warsaw, Indiana, United States * Work mode: Hybrid or on-site Key ... Produce prototype models and samples to evaluate and refine packaging concepts. * Support packaging ...
New
$55 - $75/hr
C2C / freelance * Location: Warsaw, Indiana, United States * Work mode: Hybrid or on-site Key ... Produce prototype models and samples to evaluate and refine packaging concepts. * Support packaging ...
New
Packaging Engineer I
Warsaw, IN · On-site
$55 - $75/hr
C2C / freelance * Location: Warsaw, Indiana, United States * Work mode: Hybrid or on-site Key ... Produce prototype models and samples to evaluate and refine packaging concepts. * Support packaging ...
New
Packaging Engineer I
Warsaw, IN · On-site
$55 - $75/hr
C2C / freelance * Location: Warsaw, Indiana, United States * Work mode: Hybrid or on-site Key ... Produce prototype models and samples to evaluate and refine packaging concepts. * Support packaging ...
New
Create user flows, wireframes, clickable prototypes, polished interfaces, and developer-ready ... Internships, freelance work, and strong personal projects count. * A portfolio that demonstrates ...
Quick apply
Create user flows, wireframes, clickable prototypes, polished interfaces, and developer-ready ... Internships, freelance work, and strong personal projects count. * A portfolio that demonstrates ...
Freelance Prototyping Engineer information
See salary details
$23.52 is the 25th percentile. Wages below this are outliers.
$14.90 - $25.57
31% of jobs
The median wage is $32.14 / hr.
$25.57 - $36.23
31% of jobs
$36.23 - $46.90
4% of jobs
$56.23 is the 75th percentile. Wages above this are outliers.
$46.90 - $57.56
10% of jobs
$57.56 - $68.23
9% of jobs
$68.23 - $78.89
5% of jobs
$78.89 - $89.55
0% of jobs
$89.55 - $100.22
8% of jobs
$100.22 - $110.88
0% of jobs
$110.88 - $121.55
0% of jobs
$121.55 - $132.21
1% of jobs
$14
$47
$132
How much do freelance prototyping engineer jobs pay per hour?
As of Sep 3, 2026, the average hourly pay for freelance prototyping engineer in the United States is $47.71, according to ZipRecruiter salary data. Most workers in this role earn between $24.28 and $61.78 per hour, depending on experience, location, and employer.
What is the difference between Freelance Prototyping Engineer vs Freelance Product Designer?
| Aspect | Freelance Prototyping Engineer | Freelance Product Designer |
|---|---|---|
| Credentials | Engineering background, technical skills in prototyping tools | Design background, skills in UI/UX, graphic design |
| Work Environment | Technical labs, workshops, digital prototyping tools | Design studios, digital platforms, client meetings |
| Industry Usage | Product development, hardware/software prototyping | App/website design, user experience projects |
| Search & Comparison | Often compared for technical prototyping roles | Compared for visual and user experience design roles |
Freelance Prototyping Engineers focus on creating functional prototypes using engineering skills, while Freelance Product Designers emphasize visual and user experience aspects. Both roles collaborate closely in product development but differ in technical and design expertise.
More about Freelance Prototyping Engineer jobs
What cities are hiring for Freelance Prototyping Engineer jobs?
Cities with the most Freelance Prototyping Engineer job openings:
What are the most commonly searched types of Prototyping Engineer jobs?
The most popular types of Prototyping Engineer jobs are:
What states have the most Freelance Prototyping Engineer jobs?
States with the most job openings for Freelance Prototyping Engineer jobs include:
What job categories do people searching Freelance Prototyping Engineer jobs look for?
The top searched job categories for Freelance Prototyping Engineer jobs are:
Job description
Role Overview
Labelbox is the RL data factory for advancing frontier agent capabilities. We build the data, evaluations, and infrastructure that frontier labs use to train and judge their agents. We're looking for talented, experienced engineers to join us. The bar is high: engineers who have strong judgment and set technical direction, quickly build prototypes that scale into the reliable systems, and are at the frontier of agent-first engineering practices and innovating to accelerate the speed of the business.
What you may work on- Eval systems that run millions of agent trajectories to measure model and product quality.
- Fine-tuning pipelines that turn evaluation signals into measurable agent improvements.
- Agent-first product surfaces: UX and infrastructure for workflows where the user is a model or an agent operator.
- The systems behind hundreds of thousands of AI interviews used to source and match freelance workers to projects.
- Infrastructure that scales to the throughput frontier labs actually need.
- Integration of the latest models and capabilities into production within days of release.
- 4+ year track record of shipping systems customers and other engineers rely on
- You build full stack prototypes fast and they hold up. The v1 you ship becomes the foundation the rest of the team builds on.
- Strong system and API design judgement
- Hard architecture and product calls land with you. You make them, defend them under pressure, and update fast when someone else is right.
- You ship production code with coding agents daily. You know where they break and what it takes to make them reliable to further accelerate the team's velocity.
- You set direction by being the example. Other engineers reach for your designs and your code as the reference.
- You move fast in ambiguous, startup-pace environments with influence over authority.
- You have worked in all parts of the stack
- Deep proficiency in TypeScript and/or Python.
- Production experience building LLM- or agent-driven products.
- Designing evaluations for LLMs and agents, or producing high-quality data for ML systems.
- Background in production distributed systems, ML infrastructure, or data systems at scale.
Our engineering team works with a modern tech stack designed for scalability, performance, and developer efficiency:
- Frontend: React.js with Redux, TypeScript
- Backend: Node.js, TypeScript, Python, some Java & Kotlin
- APIs: GraphQL
- Cloud & Infrastructure: Google Cloud Platform (GCP), Kubernetes
- Databases: MySQL, Spanner, PostgreSQL
- Queueing / Streaming: Kafka, PubSub
About Labelbox
Sourced by ZipRecruiter
Company size
51 - 200 Employees
Headquarters location
San Francisco, CA, US
Year founded
2018