Senior Python Software Engineer at Synthflow

Synthflow AI is a no-code platform for deploying voice AI agents that automate phone calls across contact center operations and business process outsourcing (BPO) at scale. We help mid-market and enterprise companies manage routine calls to save teams time and resources. Our agents have already delivered measurable impact: - Over 5 million hours of contact center operations saved - 35% more calls answered compared to non-AI operators - 45 million calls handled with a 99.9% uptime Backed by Accel, Atlantic Labs, and Singular and trusted by over 1,000 customers, our growth leads an industry shift toward sophisticated and accessible conversational AI. 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.