Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Freelance Agent Evaluation Engineer

$50 per hour
Part-time

Please submit your CV in English and indicate your level of English proficiency.


Mindrift connects specialists with project-based AI opportunities for leading tech companies, focused on testing, evaluating, and improving AI systems.  Participation is project-based, not permanent employment.


We're building a dataset to evaluate AI coding agents - how well a model handles real-world developer tasks.

You'll create challenging tasks and evaluation criteria within realistic simulated environments:

  • Build realistic developer environments - a virtual company with codebase, infrastructure, and context (tickets, docs, conversations) that forms a believable development history
  • Design tasks from intermediate states of these environments - craft the prompt, define what "solved" means, and ensure the task is solvable by an AI agent
  • Write tests that verify agent solutions - accept all valid approaches and reject incorrect ones, neither too strict nor too lenient
  • Iterate on tasks and tests based on QA feedback - review agent solutions, analyze failures, and refine until the evaluation is fair and robust

What this is NOT:

  • Not data labeling
  • Not prompt engineering
  • Not writing code from scratch - the agent writes most of the code; you guide and evaluate

What we look for:

  • 5+ years in software development
  • Core stack: Python (FastAPI), JavaScript/TypeScript (React), Docker, Postgres, Kafka, Redis
  • Experience writing tests (functional, integration)
  • English proficiency - B2+

Why this is hard:
Frontier models are already good at coding. Creating a task that genuinely challenges the best models is non-trivial. You need to deeply understand where models fail and what scenarios reveal the difference between a good and a bad solution. Tasks have many valid solutions - writing tests that accept all correct solutions and reject incorrect ones is harder than it sounds.

Requirements and benefits

Educational qualifications

  • A Master’s Degree in Computer Science, Software Engineering, Data Science / Data Analytics, Artificial Intelligence / Machine Learning, Computational Linguistics / Natural Language Processing (NLP), Information Systems or other related fields.
  • Bachelor’s degree is accepted if only candidate has 5 years of experience in the field.

Academic and/or Professional Experience

Candidates should have a minimum of 3 years of professional experience in related roles or domain - specifically for QA-automation/testing or cybersecurity roles

How it works
Apply → Pass qualification(s) → Join a project → Complete tasks → Get paid

Compensation:
Paid per accepted task. Your rate depends on the qualification tier you reach and how efficiently you complete tasks — up to the equivalent of $50/hr . Because payment is per task, a faster pace raises your effective hourly rate.

Why this freelance opportunity might be a great fit for you? 

  • Take part in a part-time, remote, freelance project that fits around your primary professional or academic commitments.
  • Work on advanced AI projects and gain valuable experience that enhances your portfolio. - Influence how future AI models understand and communicate in your field of expertise.
Vacancy posted 13 hours ago
Similar jobs that could be interesting for youBased on the Freelance Agent Evaluation Engineer in London vacancy
  • $50 per hour

     ...companies, focused on testing, evaluating, and improving AI systems....  ...dataset to evaluate AI coding agents - how well a model handles real...  ...data labeling Not prompt engineering Not writing code from...  ...effective hourly rate. Why this freelance opportunity might be a great... 
    Freelance
    Hourly pay
    Permanent
    Temporary
    Part-time
    Remote

    Mindrift

    London
    5 hours ago
  • $100 per hour

     ...Angelo , Larry Summers , and Jack Dorsey . Position: Agent Engineer Type: Contract Compensation: $100–$500/hour...  ...and operate LLM agents in production environments. Evaluate agent performance and determine improvements after changes.... 
    Suggested
    Remote job
    Summer work

    Mercor

    London
    3 days ago
  • £69k - £91k per annumEstimated
     ...frontier data and models by building complex agents for enterprises around the world through...  ...developed at Scale. As an Applied AI Engineer, you’ll work with clients to create ML solutions...  ...allows us to ensure a fair and thorough evaluation of all applicants. About Us: At... 
    Suggested

    Scale AI

    London
    a month ago
  •  ...Lead the design and delivery of production-grade AI agents : You’ll manage and grow a team of engineers building highly performant, reliable, and intuitive AI...  ...'t precisely match the job description. We strive to evaluate all applicants consistently without regard to race, color... 
    Suggested
    Full-time
    Flexible hours

    sierra

    London
    7 hours ago
  •  ...similar to this one. Our client, a global leading EPC and engineering organisation , is seeking an experienced Lead Electrical Engineer...  ...technical advice, requisition oversight, and technical bid evaluations . Ensure compliance with national, international, and... 
    Freelance
    Self-employed

    TRS Staffing Solutions

    Feltham, Greater London
    29 days ago
  •  ...and stakeholders. We are seeking to engage a Senior Project Engineering Consultant with deep Process Engineering expertise to...  ...Engagement with external vendors and contractors, including technical evaluations, support to commercial negotiations, and advisory input to... 
    Freelance
    Self-employed

    Assala Energy

    London
    12 days ago
  •  ...project packages, contractors and third parties. Identify, evaluate and manage package risks across design, manufacture and...  ...Qualifications Degree qualified (or equivalent) in electrical engineering, or a closely aligned discipline. Significant experience along... 
    Freelance
    Self-employed
    On-site

    TRS Staffing Solutions

    London
    12 days ago
  • £45 per hour

    Job Title: Research Engineer, AI Systems / LLM Agents Location: London Kings Cross, hybrid, 3 days onsite per week Rate: £45 per hour PAYE Contract...  ...learning research. Key Responsibilities ~Build and evaluate LLM agents and machine learning research workflows. ~... 
    Hourly pay
    40 hours/week
    Internship
    Hybrid working
    Immediate start
    Monday to Friday

    Career Moves Group

    London
    more than 2 months ago
  •  ...Role Purpose The Electrical Design Engineer will be responsible for delivering high-quality electrical designs and schematics that...  ...analysis, cable sizing, protection coordination, and fault current evaluation. Ensure all designs comply with relevant UK and... 
    Freelance
    Self-employed
    Hybrid working
    Flexible hours

    Connected Kerb

    London
    11 days ago
  •  ...English (Sri Lankan) Audio Evaluators Needed | Remote Freelance Opportunity Are you fluent in Sri Lankan English ? What You'll Do: • Evaluate short English (Sri Lankan) audio clips • Identify and assess regional accents • Compare recordings for accent accuracy and... 
    Freelance
    Remote

    Welo Data

    London
    more than 2 months ago
  • £111k - £148k per annumEstimated
     ...you’re empowered to do your best work. Build the Agents That Build Our Software Most engineering roles now come with AI tools. This one comes with a...  ...not just use AI to code faster. You will design, ship, evaluate, and harden production agents that colleagues across... 
    Full-time

    Equinix

    London
    19 days ago
  • $44 per hour

     ...Are you passionate about linguistics, language quality, and evaluation? We are launching an exciting language evaluation project and are...  ...Commitment:  ~20 hours/week (flexible schedule) Job Type: Freelance contract Pay Rate: $44 USD/hour Location: United Kingdom... 
    Freelance
    Immediate start
    Flexible hours

    Welo Data

    London
    more than 2 months ago
  •  ...of premium brands and make a lasting impact in fashion, beauty, jewelry, or automobiles. About the Role: As a luxury brand evaluator, you will step into the world of luxury to discreetly assess customer experiences, providing critical feedback that helps brands refine... 
    Freelance
    Flexible hours

    CXG

    London
    28 days ago
  •  ...We are seeking Audio Evaluators to participate in an exciting project focused on evaluating audio clips in Cantonese . This role involves...  ...Project Details • Location: Remote • Job Type : Freelance contract    Key Responsibilities • Listen to short audio clips... 
    Freelance
    Part-time
    Remote

    Welo Data

    London
    more than 2 months ago
  • £300 - £350 per day

     ...PSR Solutions are currently recruiting for a Freelance Setting Out Engineer on behalf of a specialist civil engineering contractor for a project based in East London. Our client is a well-established contractor delivering infrastructure and civil engineering works across... 
    Freelance

    PSR Solutions

    East London
    5 days ago
  •  ...causes, leading to recurring issues. To tackle these challenges, we need an experienced and pragmatic professional to provide process engineering services for our sites to diagnose problems, and propose effective solutions. Your deliverables will include :... 
    Freelance
    Self-employed
    Relief staff
    On-site

    Assala Energy

    London
    12 days ago
  •  ...Framework and project governance. Certifications: Hold a degree or equivalent in Mechanical, Civil or Electrical Engineering, Marine Logistics, Renewable Energy or another closely related engineering or science area. Have significant demonstratable experience... 
    Freelance
    Self-employed

    TRS Staffing Solutions

    London
    12 days ago
  • £400 - £450 per day

     ...Senior Engineer Aviation | Night Shifts | Freelance | Inside IR35 Are you a Senior Engineer with genuine main contractor experience, strong setting-out/site delivery knowledge and the right tickets to take ownership of night-shift works? We're currently looking for... 
    Freelance
    Long-term contract
    Full-time
    Shift work
    Night shift
    Weekend work

    Carrington West

    London
    21 days ago
  •  ...Competitive (DOE) Joseph Gallagher is the leading UK based Civil Engineering & Tunnelling sub-contractor, growing significantly in the last 3...  ...taking place today. We are currently recruiting for an Agent to join our heavy civils team in Central London As the Agent... 
    Full-time

    Joseph Gallagher Limited

    London
    more than 2 months ago
  • £25 - £35 per hour

     ...Job Title: Freelancer Studio Engineer Location: Shoreditch, London, United Kingdom (no Hybrid/Working from home Option) Salary: £25-£35 p/hour depending on experience. When required, it will be a minimum of at least 3 hours at a time. Start date : As soon as possible... 
    Freelance
    Temporary
    Immediate start
    Remote

    Podshop

    Shoreditch, Greater London
    21 days ago
  • $85 per hour

     ...Larry Summers , and Jack Dorsey . Position: Systems Engineer (Coding Agent Experience) Type: Contract Compensation: $...  ...Use frontier AI coding agents to complete and evaluate complex engineering tasks. Review model-generated code,... 
    Remote job
    Summer work

    Mercor

    London
    more than 2 months ago
  • £70k - £80k per annum

     ...will become a defining feature of the transport hub. Its scale, engineering complexity and architectural ambition are expected to make it globally...  ...to be repeated.  As a Package Manager (think experienced Sub Agent or Site Agent), you'll take ownership of one of several key... 
    Permanent
    West London
    6 days ago
  • $100 - $150 per hour

     ..., Larry Summers , and Jack Dorsey . Position: Sales Engineering Expert Type: Contract Compensation: $100–$15...  ...handling technical objections, supporting proofs of concept, and evaluating product fit and technical risk. ~ Hands-on experience with... 
    Remote job
    Summer work

    Mercor

    London
    6 days ago
  • $80 - $110 per hour

     ...An enterprise client is seeking experienced Structural Engineers to help train and evaluate next-generation AI systems. This opportunity is part of a large-scale initiative focused on improving how AI models solve complex structural engineering problems and generate... 
    Hourly pay
    Remote
    Flexible hours

    Lifted, an Upwork Company™

    London
    27 days ago
  • $60 per hour

     ...Lua Developers to support AI model training through technical evaluations, scripting tasks, and code quality reviews. This opportunity...  ...leveraging the expertise of experienced software developers. Selected freelancers will help evaluate AI-generated code, review programming... 
    Freelance
    Weekly pay
    Remote

    Lifted, an Upwork Company™

    London
    21 days ago
  • £29k - £39k per annumEstimated
     ...should not be edited. Note that these competencies are found in employee’s My Development Plan view and in the employee’s performance evaluation in the Professional Development Centre.. ~ Exceptional Customer Service:  Exceeds customer expectations by anticipating,... 
    Full-time

    Expeditors

    Feltham, Greater London
    7 days ago
  •  ...current contract with the contract administrator. Assists in evaluation of change requests: interfaces with the contract administrator...  ...contract cost forecast developments as required. Liaises with Engineering, Contracts, Construction and UPT management on evaluation of... 
    Freelance
    Self-employed
    5 days/week

    TRS Staffing Solutions

    London
    8 days ago
  •  ...Purpose of the Role The Freelance Compliance Consultant provides independent, specialist support to health and social care providers to...  ...regulatory audits, aligned to CQC frameworks. Demonstrable ability to evaluate evidence, identify risks, and provide practical, improvement‑... 
    Freelance
    Self-employed

    Delphi Care Solutions

    London
    25 days ago
  • £67k - £86k per annumEstimated
     ...for a Senior Product Manager to lead Agent Hub & Catalogue , a core capability within...  .... Shape how users browse, search, evaluate and launch AI agents. Use data, research...  ...Collaboration: Partner with Product, Engineering, Design and Architecture teams to deliver... 
    Hybrid working
    On-site

    WPP

    London
    a month ago
  •  ...to recruit the person who will own and evolve our underwriting agents. Working at the intersection of credit, product and AI, the role...  ...systems Convert complex credit analysis into agent workflows, evaluation frameworks and decision logic Build systems that can reason through... 
    Immediate start
    Flexible hours

    Treyd

    London
    a month ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Freelance Agent Evaluation Engineer. Be the first to apply!