Experienced Backend Developer

At ai-coustics, we’re building the quality layer for Voice AI. Our AI-powered speech technology turns any audio - live or recorded - into studio-quality output. Since our launch, we’ve built a community of over 800,000 users, have processed more than 2 million audio files.

We’re at a pivotal moment of growth and product innovation - and we’re looking for ambitious builders to join us on this journey. If you’re excited about defining a new category in Voice AI and shaping the future of audio, we’d love to meet you.

Who we are

We’re an in-person team of audio and technology enthusiasts based out of Berlin. We love being in the office, hanging out together and learning from each other everyday.

We ship fast. All of our work is novel and cutting edge, and execution speed is paramount. Our culture thrives on ownership and open collaboration - where the best ideas win, no matter where they come from. We support each other. We have an open and inclusive culture that’s focused on giving everyone the resources they need to succeed.

The ideal start date for this position is Jan 1, 2026.

Tasks

• Design & Implement APIs : Architect, build, and maintain RESTful and event-driven microservices using FastAPI.
• Database Management : Optimize and maintain PostgreSQL schemas, queries, and migrations for high throughput and reliability.
• Cloud Infrastructure : Deploy, monitor, and scale services on AWS (EKS, RDS, S3) following best practices.
• Containerization & Orchestration : Build and orchestrate Docker containers with Kubernetes (EKS) to ensure seamless deployments.
• CI / CD Pipelines : Implement and maintain continuous integration and delivery workflows using GitHub Actions.
• Testing & Quality : Write unit, integration, stress and end-to-end tests to uphold code quality and reliability.Architectural Design : Collaborate on software architecture decisions, especially around microservices, event streaming, and system observability.

Requirements

Nice-to-Have Qualifications

Benefits

If you are ready to lead the charge in revolutionizing the audio experience and drive our startup to new heights, we would love to hear from you. Apply today to join the ai-coustics team!

We are backed by leading early-stage investors including Connect Ventures, Partech, Inovia Capital , as well as angel investors from HuggingFace, DeepMind and Amazon with deep expertise in AI and developer infrastructure. These partners share our vision and are helping us build a world-class team operating with high levels of responsibility and velocity . We look for people who take ownership, think systemically, and want to solve challenging real-world problems in close collaboration with our customers. If you’re motivated by developing technology that is used in practice, shaping an emerging category and setting a new standard for how Voice AI works in the real world, you’ll feel at home at ai-coustics.