Senior Python Engineer (AI & Agentic Workflows)

Relocation | MontenegroPrequelSenior Python Engineer (AI & Agentic Workflows)We’re looking for a Senior Python Engineer who can own and build the core backend and workflow infrastructure behind our agentic systems — someone practical, fast, and comfortable driving complex integrations end-to-end. Responsibilities

• Product-manage and build the internal Agent Hub (FastAPI) with tool registry, RAG memory, and per-agent quotas.
• Build reliable stateful workflows using Temporal or Google Workflows.
• Implement human-in-the-loop integrations via n8n (Slack, Google Drive, Jira, Plane.so) with Temporal and Celery tasks.
• Orchestrate end-to-end agentic pipelines: insight → brief → asset → approval → ad upload.
• Design prompt/output schemas (Pydantic/JSON) and LLM evaluation harnesses (Langfuse).
• Ensure integration security and stability: secure webhooks, OAuth, rate limits, idempotency.
• Maintain full observability with OpenTelemetry trace_id propagation.

Requirements

• Strong Python 3.11+ skills; experience building production-ready services with FastAPI, Pydantic, SQLAlchemy.
• Hands-on with workflow orchestration (n8n, Temporal/Google Workflows) and system integrations (Slack Bolt, Google APIs, Plane.so a plus).
• Familiarity with modern AI tools (LangGraph, crewAI, LlamaIndex, Langfuse, pgvector) and prompt/context engineering.
• Understanding of distributed systems: Pub/Sub, Postgres 15+, BigQuery, Celery/GKE, cloud (GCP/AWS).
• Product-minded, platform-focused engineer with strong ownership; builds reliable, observable, scalable systems.
• Comfortable using AI assistants (Copilot, Claude) to speed up development without compromising quality.

How we hire

• HR interview
• Tech interview
• Final interview СТО
• Reference check

Conditions

• Professional development — access to paid training and courses, online/offline lectures, workshops, and trainings. Our team participates in all major IT meetups;
• Adaptation — qualitative onboarding, we help to quickly and smoothly solve all problems and regularly collect feedback;
• Career development — Review is conducted every 6 months, we monitor the results and help improve performance;
• Equipment — everything you need to work: powerful, additional monitors, phones\devices\ software license;
• Balance between work and personal life — the ability to conveniently build your work schedule, take days off without a bunch of approvals and bureaucracy;
• Health — the opportunity to obtain extended voluntary health insurance (on the territory of Montenegro);
• Office space — a cool office in Montenegro, with comfortable workplaces and lounge areas;
• Relocation — we offer a full package of documents for those who has opportunity to join an office space in Montenegro, and we help with obtaining a residence permit;
• Prequel + — premium access to the entire Prequel product.

More information about the vacancy : Senior Python Engineer (AI & Agentic Workflows) at Prequel