Database Engineer - Fully Remote | Up to $2200/task

Mercor; Berlin; Remote; EUR 90,000 - 130,000; Full time

Job summary

Mercor seeks highly experienced database engineering experts to design and evaluate real-world AI-driven database tasks. You will craft challenging, self-contained tasks, establish clear grading criteria, and ensure robust checks for correctness, performance, and resilience.

In this role you’ll work with technical reviewers to refine tasks, define evaluation metrics for latency, throughput, and memory use, and help advance our pilot assessment program.

Qualifications

• At least five years of hands-on database-engine internals experience, or a database-systems PhD.
• Deep experience with storage engines, query execution, optimization, transactions, replication, or related low-latency systems.
• Strong implementation skills and clear explanations of correctness and performance tradeoffs.
• Experience with Go is preferred.

Responsibilities

• Design one challenging, self-contained database engineering task.
• Build checks for correctness, failure handling, concurrency, retries, and regressions where relevant.
• Evaluate performance measures such as latency, throughput, and memory use.
• Write clear grading criteria for engineering judgment.
• Work with technical reviewers to refine and validate the task.

Skills

DB internals expertise

Go programming

Performance optimization

Clear explanations

Go preferred

Education

Database-systems PhD

Tools

Go

Job description

Applications close Friday, October 16, 2026 at 12:00 p.m. Pacific. We are selecting the first three applicants who qualify for the initial pilot.

About the work

Build real-world tasks that test how well AI agents handle database engineering. Depending on your specialty, your task may cover database-engine implementation, production diagnosis, or application migration.

Each task should include a clear problem statement, a reproducible repository or environment, a working reference solution, tests, and grading criteria that distinguish a robust engineering solution from one that only appears correct.

What you'll do

• Design one challenging, self-contained database engineering task.

• Build checks for correctness, failure handling, concurrency, retries, and regressions where relevant.

• Evaluate performance measures such as latency, throughput, and memory use.

• Write clear grading criteria for engineering judgment.

• Work with technical reviewers to refine and validate the task.

Who we're looking for

• At least five years of hands-on database-engine internals experience, or a database-systems PhD.

• Deep experience with storage engines, query execution, optimization, transactions, replication, or related low-latency systems.

• Strong implementation skills and clear explanations of correctness and performance tradeoffs.

• Experience with Go is preferred.

DBA, SQL analytics, ETL, or application-only database experience does not qualify on its own. You do not need to specialize in every task area.

Application process

Complete a self-paced technical assessment with written responses and a coding exercise. You control when to advance between sections. (~35 min)

Use a laptop or desktop with a camera, microphone, and entire-screen sharing. Have your own editor and terminal ready, along with Python 3.8+ and a compiler for C, C++, Rust, Go, or Java. The assessment includes a starter kit and public tests. Complete the assessment independently, without outside AI assistance.

Paid task after selection

Selected experts will complete one task, with approximately 25 hours of work, followed by technical review and feedback.

Task deadline: Friday, October 30, 2026.