Senior Python Software Engineer

Stack

Responsibilities

• ▹Develop and maintain backend infrastructure, focusing on scalability, performance, and reliability
• ▹Design and evolve data models and persistence layers, primarily with PostgreSQL (schema design, migrations, query performance, indexing, transactions)
• ▹Build and maintain enterprise-grade APIs (e.g., FastAPI), including versioning, authentication/authorization, and observability
• ▹Engage in pair programming to improve code quality and collaboration
• ▹Manage deployments and environments using Kubernetes and GitOps practices (ArgoCD)
• ▹Conduct code reviews, providing constructive feedback and upholding best practices
• ▹Contribute to product delivery end-to-end, including occasional front-end work

Requirements

• ▹5+ years of experience as a Python developer, shipping production systems
• ▹Strong experience building scalable and extensible data infrastructure
• ▹Deep familiarity with relational databases, especially PostgreSQL (performance tuning, migrations, transactions)
• ▹Experience building and maintaining enterprise-grade APIs with FastAPI
• ▹Hands-on experience running production workloads on Kubernetes
• ▹Experience with Argo CD (GitOps deployment workflows)
• ▹Experience with GitHub Actions
• ▹Proficiency in cloud environments (preferably GCP or AWS)

Nice to have

• ▹Ability to contribute to front-end work (not necessarily a specialist), ideally with React/TypeScript
• ▹Golang experience, with willingness to contribute to the orchestration stack built in Go

Soft skills

What we offer

• ▹High autonomy in a fast-moving startup
• ▹Engineering-first environment working on foundational systems
• ▹Career growth as the company scales
• ▹Competitive pay, equity options, and comprehensive benefits

About the company

Synthflow AI is an enterprise AI agent platform unifying customer operations across voice, chat, and messaging, with 20M+ hours of automated operations, 150M+ interactions handled, and 99.99% uptime. Backed by Accel, Atlantic Labs, and Singular, trusted by 1,000+ customers. Founded in Berlin in 2023.