Senior Backend Engineer (Python)

October 20, 2026

Remote

Senior

Europe

Description

SplitMetrics is a global software company building an ecosystem of products for mobile-first businesses: Apple Ads automation, a full-service marketing agency, an A/B testing platform and an ASO platform. The company is hiring a Senior Backend Engineer (Python) to join the backend team working on AI features. The role covers Python services, async job execution, LLM integrations, MCP servers for third-party AI agents and ETL pipelines. SplitMetrics operates remote-first across 20+ countries and has been in the mobile marketing industry for over 11 years.

Responsibilities

Design and build backend services in Python (FastAPI)
Implement async job execution and status tracking (Redis/Celery/Kafka)
Integrate with LLM services (internal & external)
Build and maintain external MCP servers that expose the platform to third-party AI agents and clients
Develop ETL pipelines and ensure data quality across ingestion, transformation and storage
Ensure stability, observability and cost-efficient inference

Requirements

4+ years of Python backend experience
Strong FastAPI experience
Solid PostgreSQL + S3 (or equivalents)
Experience with async task queues (Celery, Redis, Kafka)
Production experience integrating with microservices: long-running jobs, retries, failure handling
Solid hands-on experience with agentic AI: building MCP servers, implementing agents, working with LLMs and other generative models
Genuine enthusiasm for agentic AI and keeping up with how the field evolves
Basic observability skills (logging, monitoring, alerting)
Experience in cross-functional teams (frontend, ML)
Experience with AWS infrastructure, Docker, Kubernetes
Familiarity with LangChain or agentic workflows (plus)
Marketing technology background such as ad platforms and creative tools (plus)
Experience with StarRocks or other OLAP databases like Clickhouse (plus)

Conditions

Vacation and public holidays following your country's regulations plus additional annual PTOs
Medical insurance or health care compensation and paid sick leave
Access to top online/offline conferences, mobile industry events and internal courses
Micro-management-free supportive management style with semi-annual performance reviews
Internal mobility program with new career opportunities
Corporate online events, offline team retreats and collaboration through shared OKRs
Flexible working schedule in a remote-first environment
Coworking costs coverage program and office hubs in key locations