Senior Backend Engineer (Python)

TL;DR

Senior Backend Engineer (Python): Designing and building high-performance backend services using Python and FastAPI with an accent on async job execution, LLM integration, and efficient creative asset management. Focus on ensuring stability, observability, and cost-efficient inference within a microservices architecture.

Location: Remote (Poland, Serbia, Spain, Portugal, Ukraine)

Company

hirify.global is a global software company providing an ecosystem of products and services for mobile-first businesses, including Apple Ads automation and A/B testing platforms, and has integrated AI into its strategy since 2023.

What you will do

• Design and build backend services in Python (FastAPI).
• Implement async job execution and status tracking.
• Integrate with LLM and image generation services (internal & external).
• Store, version, and serve creative assets efficiently.
• Develop APIs for Creative Dashboard and internal AI agents.
• Ensure stability, observability, and cost-efficient inference.

Requirements

• 4+ years Python backend experience.
• Strong FastAPI experience.
• Solid PostgreSQL + S3 (or equivalents).
• Experience with async task queues (Celery, Redis, Kafka).
• Production experience integrating with micro services: long-running jobs, retries, failure handling.
• Basic observability skills (logging, monitoring, alerting).
• Experience in cross-functional teams (frontend, ML).
• Experience with AWS infrastructure, Docker, Kubernetes.

Nice to have

• Familiarity with LangChain or agentic workflows.
• Marketing technology background (ad platforms, creative tools).
• Experience with StarRocks (or other OLAP databases, ex. Clickhouse).

Culture & Benefits

• Flexible working schedule and a remote-first working environment.
• Vacation and public holidays following your country's regulations, plus additional PTOs.
• Medical insurance or health care compensation and paid sick leave.
• Top online/offline conferences, mobile industry events, and internal courses for professional development.
• Micro-management-free and supportive management style with semi-annual performance review sessions.
• Corporate online events, offline team retreats, and an environment conducive to open dialogue.
• Coworking costs coverage program and office hubs in key locations.