Senior Software Engineer - Agent Evaluation - Freelance/Remote 100+ openings
Braintrust · United States
- Hybrid
- Internship
- $150,000 / year
- United States
Tailored resume — keyword-matched to this role.
Hiring manager — we find who's hiring.
Intro email — drafted to reach them directly.
Job highlights
- Evaluate AI coding agents in simulated environments.
- Design challenging tasks and write verification tests.
- Requires 5+ years software development experience.
- Utilizes Python, JavaScript, Docker, Postgres, Kafka, Redis.
- Project-based work, choose your own hours.
About the role
Senior Software Engineer - Agent Evaluation
Open to candidates in North America, South America, Asia, and Europe. 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.
What This Opportunity Involves
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.
How It Works
- Apply
- Pass qualification(s)
- Join a project
- Complete tasks
- Get paid
Effort Estimate
Tasks for this project are estimated to take 20 hours to complete, depending on complexity. This is an estimate and not a schedule requirement; you choose when and how to work. Tasks must be submitted by the deadline and meet the listed acceptance criteria to be accepted.
Hiring & Onboarding Process
The process is designed to move quickly and typically includes the following steps:
- App review and invitation to a virtual project introduction session (approximately 30 minutes)
- Platform registration and identity verification
- Technical assessment (approximately 35 minutes)
- Background check (completed at no cost to candidates)
- Onboarding and project-specific training tasks
- Begin production work!
Additional Requirements
- Willingness to complete identity verification as part of the onboarding process.
- Ability to complete a technical assessment.
- Willingness to join and participate in Discord, which will be used for project communication and updates.
- Successful completion of a background check is required prior to onboarding.
- Reliable internet connection and ability to communicate effectively in a remote environment.
Key skills/competency
- Senior Software Engineer
- AI Agent Evaluation
- Python
- JavaScript
- TypeScript
- Docker
- Postgres
- Kafka
- Redis
- Testing
Skills & topics
- Senior Software Engineer
- AI
- Agent Evaluation
- Python
- FastAPI
- JavaScript
- TypeScript
- React
- Docker
- Postgres
- Kafka
- Redis
- Testing
- Functional Testing
- Integration Testing
- Remote
- Freelance
- North America
- South America
- Asia
- Europe
- Braintrust
How to get hired
- Tailor your CV: Highlight your 5+ years of software development experience and specific skills in Python, JavaScript/TypeScript, Docker, Postgres, Kafka, and Redis.
- Emphasize testing expertise: Showcase your experience in writing functional and integration tests, crucial for evaluating AI agent solutions.
- Prepare for assessments: Be ready for a technical assessment and virtual project introduction to demonstrate your problem-solving abilities and communication skills.
- Confirm English proficiency: Ensure your CV indicates B2+ English proficiency and be prepared to discuss it.
- Understand the role: Clearly articulate your understanding of AI agent evaluation and how your skills align with designing tasks and tests.
Technical preparation
Master Python (FastAPI) for backend tasks.,Strengthen JavaScript/TypeScript (React) for frontend.,Practice Docker for environment setup.,Review SQL for Postgres and message queues.
Behavioral questions
Describe a complex testing challenge.,How do you define 'solved' for AI?,Explain a time you refined based on feedback.,How do you identify model failure points?
Frequently asked questions
- What is the work arrangement for a Senior Software Engineer at Braintrust?
- This Senior Software Engineer role is 100% remote, allowing you to work from North America, South America, Asia, or Europe. Participation is project-based.
- What are the core technical skills required for this Senior Software Engineer role?
- The core technical stack includes Python (FastAPI), JavaScript/TypeScript (React), Docker, Postgres, Kafka, and Redis. Strong experience in writing functional and integration tests is also essential.
- What does 'AI Agent Evaluation' mean in the context of this Senior Software Engineer position?
- AI Agent Evaluation involves creating realistic developer environments, designing challenging tasks for AI coding agents, writing tests to verify their solutions, and iterating based on feedback to ensure fair and robust evaluation.
- Is this a permanent position or a project-based freelance opportunity?
- This is a project-based, freelance opportunity. You will join projects as a specialist and complete tasks, rather than being a permanent employee.
- What is the estimated effort for tasks in this Senior Software Engineer project?
- Tasks for this project are estimated to take around 20 hours to complete, with flexibility in how and when you work, as long as deadlines are met.
- What are the English proficiency requirements for this role?
- Candidates are required to have B2+ English proficiency. Please indicate your level on your CV.
- What is the hiring process for the Senior Software Engineer position at Braintrust?
- The hiring process is designed to be quick and includes an app review, virtual project introduction, platform registration, identity verification, a technical assessment, background check, and onboarding.
- Does Braintrust offer permanent employment for this Senior Software Engineer role?
- No, this role is specifically a project-based, freelance opportunity, not a permanent employment position.