Remote Python Backend Engineer — AI Agent Infrastructure

OpenTrain AI, Inc.; United States; Remote; USD 61,000 - 73,000; Part time

Job summary

OpenTrain AI, Inc. is seeking a backend-focused contractor to build and evaluate software and workflows used to develop AI agents. You will concentrate on backend connectors that replicate tools such as Slack, Jira, Notion, Gmail, and wikis.

The engagement lasts four weeks, is remote, part-time at 20+ hours per week, with no cap on tasks and $300 per approved task. Candidates should have at least three years of backend development, strong Python skills including FastAPI, Flask, or Django, and

Qualifications

• At least three years of backend development experience.
• Strong Python skills with FastAPI, Flask or Django.
• Experience building scalable backends, REST APIs, and microservices.
• Working knowledge of Git, Docker, pipeline fundamentals, testing, and code-quality practices.
• Regular use of AI coding assistants such as Claude Code, Codex, Cursor, GitHub Copilot, or similar tools.
• Professional fluency in English.

Responsibilities

• Build Python backend applications that replicate tools such as Slack, Linear, Jira, Notion, Gmail, and wikis.
• Extend existing connectors and create new connectors within agreed delivery timeframes.
• Test and validate connector behavior so each implementation faithfully matches the intended system.
• Study data and workflows to identify ideas for long-horizon tasks.
• Write realistic tasks and check their quality, realism, and correctness through structured quality assurance.
• Create rubrics that distinguish correct, partly correct, and deficient work.
• Use AI coding assistants during development, quality assurance, and validation.
• Take part in calibration and quality reviews.

Skills

Python

FastAPI

Flask

Django

Backend development

REST APIs

Microservices

Docker

Git

Testing

Code quality

AI coding assistants

English proficiency

Tools

Git

Docker

Job description

OpenTrain AI, Inc. is seeking a backend-focused contractor to build and evaluate software and workflows used to develop AI agents. You will concentrate on backend connectors that replicate tools such as Slack, Jira, Notion, Gmail, and wikis.

The engagement lasts four weeks, is remote, part-time at 20+ hours per week, with no cap on tasks and $300 per approved task. Candidates should have at least three years of backend development, strong Python skills including FastAPI, Flask, or Django, and