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Senior Python Software Engineer at Synthflow | Berlin

On-site Full-time

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Experience Level

Senior

Qualifications

To excel in this role, you should possess:5+ years of experience in Python development, with a strong history of deploying production systems. Extensive experience in crafting scalable and adaptable data infrastructures. Deep knowledge of relational databases, focusing on PostgreSQL performance tuning and best practices. Proficiency in building and managing enterprise-level APIs using FastAPI. A solid grasp of engineering principles and best practices.

About the job

Join Synthflow AI, a revolutionary no-code platform designed for deploying voice AI agents that transform contact center operations and business process outsourcing (BPO) at scale. We empower mid-market and enterprise companies to efficiently manage routine calls, ultimately saving valuable time and resources for their teams.

Our voice AI agents have made a significant impact:

  • Saved over 5 million hours in contact center operations

  • Increased call answering rates by 35% compared to non-AI operators

  • Handled 45 million calls with an impressive 99.9% uptime

Supported by leading investors such as Accel, Atlantic Labs, and Singular, we are proud to serve over 1,000 customers and drive an industry shift towards advanced and accessible conversational AI.

About the Role:

We are seeking a Senior Python Engineer to develop robust, production-grade software and backend systems, focusing on databases, scalable APIs, and core engineering principles.

Your Key Responsibilities:

  • Design, develop, and maintain our backend infrastructure, ensuring scalability, performance, and reliability.

  • Create and enhance data models and persistence layers with a strong emphasis on PostgreSQL best practices, including schema design, migrations, query optimization, indexing, and transactions.

  • Develop and support enterprise-grade APIs using FastAPI, focusing on versioning, authentication/authorization, and observability.

  • Participate in pair programming to foster code quality and team collaboration.

  • Manage deployments and environments with Kubernetes and GitOps practices (ArgoCD).

  • Conduct code reviews, offering constructive feedback and ensuring adherence to best practices.

  • Contribute to end-to-end product delivery, including occasional front-end feature development when necessary.

Qualifications:

  • 5+ years of experience as a Python developer, successfully delivering production systems.

  • Proven expertise in building scalable and extensible data infrastructures.

  • Strong familiarity with relational databases, particularly PostgreSQL (performance tuning, migrations, transactions).

  • Experience in developing and maintaining enterprise-grade APIs using FastAPI.

  • Solid understanding of engineering fundamentals and best practices.

About Synthflow AI

Synthflow AI is at the forefront of the conversational AI revolution, providing a no-code platform that allows businesses to deploy voice AI agents seamlessly. Our technology is trusted by over 1,000 clients and has delivered significant efficiency improvements across contact center operations.

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