We are looking for Senior Backend Engineer (Python/FastAPI) – AI Evaluation (US-based) candidates for a project delivered through the hiring partner.

What you'll do

Create cutting-edge datasets for training, benchmarking, and advancing large language models, collaborating closely with researchers.
Curate code examples, provide precise solutions, and make corrections, with a primary focus on Python across backend services, data pipelines, and ML infrastructure, alongside JavaScript (including ReactJS), C/C++, Java, Rust, and Go.
Evaluate and refine AI-generated code for efficiency, scalability, and reliability.
Work with cross-functional teams to enhance enterprise-level AI-driven coding solutions.
Curate code examples, build solutions, and correct code — primarily in Python, with additional work in JavaScript (including ReactJS), C/C++, Java, Rust, and Go.
Evaluate and refine AI-generated code to ensure that it is efficient, scalable, and reliable.
Collaborate with cross-functional teams to enhance AI-driven coding solutions against industry performance benchmarks.
Build agents and automated verification tools in Python that can verify the quality of code and identify error patterns.
Hypothesize on steps in the software engineering cycle (prototyping, architecture design, API design, production implementation, launch, experiments, monitoring, operational maintenance) and evaluate model capabilities on them.
Design verification mechanisms that can automatically verify a solution to a software engineering task.

What you need

Several years of software engineering experience (3 years or more)
Strong expertise in Python with deep knowledge of frameworks, tooling, and best practices for building production-grade software.
Experience building full-stack applications and deploying scalable software using modern languages and tools.
Deep understanding of software architecture, design, development, debugging, and code quality/review assessment.
Excellent oral and written communication skills for clear, structured evaluation rationales.
Candidates must be based in the United States

Worked at the frontier of AI — at companies like OpenAI, NVIDIA, Databricks, Palantir, Snowflake, or similar organizations pushing the boundaries of intelligent systems.
Graduates from programs with strong CS foundations such as University of Washington, University of Illinois Urbana-Champaign, UT Austin, University of Michigan, Purdue, and comparable institutions.

RequiredAlso useful

Also listed: communication skills.

Project and contracting process: the hiring partner. Applications continue on the provider's website.

This role does not publish a rate, for 10 to 40 h/week. The work is remote.

Open to candidates in United States. With a profile, Tier1 checks your country and languages against this role and every other before you apply.