Stack Builders is looking for a Senior Python Developer contractor to build a production-grade security automation platform from an AI-generated prototype. You will collaborate directly with the client's security product lead in an agile environment focused on automation, data engineering, and AI-augmented development.

What You'll Do

Productize and extend a Python-based Security Automation Platform that replaces L1/L2 SOC operations.
Develop integrations with threat intelligence services like VirusTotal and Abuse.ch.
Design and improve a multi-process automation architecture and a YAML-based workflow engine.
Ensure all development is AI-first, with AI generating 60–70% of the first-draft code.
Be deeply involved in all aspects of engineering: clarifying detection logic, building scalable pipelines, workflow engines, and automated response systems.

What We're Looking For

Highly proficient in Python 3.10+ and experienced in building large, production-grade backend systems.
Experience with data ingestion pipelines, REST APIs, event/log processing, or message queues.
Hands-on experience with Elasticsearch / Kibana, or similar search/analytics platforms.
Comfortable working with MongoDB and ideally have experience with MongoEngine or another ODM.
Understand or have worked with SOC, SIEM, SOAR, EDR, or incident response tooling.
Can integrate with third-party APIs and manage auth, throttling, error handling, retries, and async patterns.
Experience working in or extending a large existing codebase (~50K lines).
Familiarity with workflow/orchestration engines (custom or Python ecosystem).
Comfortable using AI coding tools (Claude Code, Copilot, Cursor, ChatGPT) as part of your daily workflow.
Can direct AI with clear prompting, refine its output, and detect subtle correctness or security issues.
Advanced professional spoken and written English skills.
Clear, organized, and assertive communication.
Can work a minimum of 4 hours overlapping with the US Eastern timezone for real-time collaboration.
Enjoy working in a small, senior, high-ownership team.
Eager to learn, grow, and have fun while addressing meaningful challenges.

Nice to Have

Knowledge of threat intel APIs such as VirusTotal, Abuse.ch, MISP, and OTX.
Familiarity with Windows event logs or endpoint telemetry.
Experience with Go (not required but favored for long-term scalability).
Exposure to React/Next.js is a plus (future risk-rating UI team will integrate with your backend work).

Technical Stack

Python, Elasticsearch, Kibana, MongoDB, MongoEngine, REST APIs, YAML

Team & Environment

You will be part of a small, senior, high-ownership team and collaborate directly with the client's security product lead.

Benefits & Compensation

Projected hourly range $40.00 to $48.00.
100% remote and flexible modality.
A human-centered experience in a people-first company.
Challenging, full-time, and long-term projects with globally admired companies.
A strong learning culture and regular pairing sessions.
Opportunities for conference participation, OSS contributions, tutorials, blog posts, and technical talks.
Exceptionally talented and passionate coworkers.
Timely payments, with flexibility to choose the payment date modality.