Synthflow AI is an enterprise AI agent platform that unifies customer operations across voice, chat, and messaging. Our agents handle routine interactions at scale so teams can focus on high-value work.

• Over 20M hours of operations automated

• 60% more calls answered vs. non-AI operators

• 150M interactions handled, 99.99% uptime

Backed by Accel, Atlantic Labs, and Singular. Trusted by 1,000+ customers. Recognized as one of the most promising companies in Germany.

About the role:

We’re looking for a Senior Python Engineer to craft reliable, production-ready software and backend systems, with a strong emphasis on databases, scalable APIs, and engineering fundamentals.

Your responsibilities will include:

• Develop and maintain our backend infrastructure, focusing on scalability, performance, and reliability.

• Design and evolve data models and persistence layers with a strong focus on PostgreSQL and database best practices (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 work on front-end features when needed.

You have:

• 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 front-end specialist), ideally with React/TypeScript.

• Golang experience, with willingness to contribute to our orchestration stack, which is built in Go

What we offer:

• Autonomy at speed: High-ownership roles in a fast-moving startup.

• Engineering-first environment: Work on foundational systems that directly impact reliability and scale.

• Career growth: Scale your impact as the company grows.

• Rewarding package: Competitive pay, equity options, and comprehensive benefits that reflect your skills and experience.

Founded in Berlin in 2023 by serial entrepreneurs Albert Astabatsyan, Hakob Astabatsyan, and Sassun Mirzakhan-Saky, Synthflow AI democratizes access to advanced voice AI with a no-code platform that lets enterprises easily create, deploy and scale natural-sounding, cost-effective voice agents tailored to their business needs.