Backend Engineer

Persistence is building the infrastructure layer for next-generation AI voice applications. We are looking for a Backend Engineer who enjoys solving distributed systems problems, building scalable services, and owning critical backend infrastructure.

Responsibilities:

• Build high-performance backend services using Go.
• Design and develop scalable APIs and microservices.
• Work with PostgreSQL, ClickHouse, and distributed data systems.
• Build event-driven systems using Kafka and message queues.
• Design reliable data pipelines and backend workflows.
• Optimise system performance, latency, and resource utilisation.
• Work on real-time communication infrastructure (WebRTC, LiveKit).
• Collaborate closely with product, AI, and frontend teams.
• Own services end-to-end from design to deployment and monitoring.
• Improve backend architecture, reliability, and developer experience.

Requirements:

• 3-5 years of backend development experience.
• Strong experience with Go (Golang).
• Experience building scalable APIs and distributed systems.
• Strong understanding of PostgreSQL and database design.
• Experience with Kafka or similar messaging systems.
• Experience with cloud infrastructure and containerised deployments.
• Good understanding of system design, concurrency, and performance optimisation.
• Ability to debug production systems and drive issues to resolution.
• Ability to own features and services end-to-end.
• Tech Stack: Go, Kafka, PostgreSQL, ClickHouse, LiveKit, WebRTC, Kubernetes, AWS, Python, gRPC, Docker.

Nice to Have:

• Experience with LiveKit, WebRTC, or real-time communication systems.
• Experience with ClickHouse or analytical databases.
• Experience with Kubernetes and cloud-native architectures.
• Experience building AI or voice infrastructure systems.
• Startup experience.

What Matters Most:

• You write clean, maintainable, and scalable code.
• You think in systems, not just features.
• You care about reliability, performance, and developer experience.
• You can move fast and take ownership.
• You enjoy solving hard engineering problems.
• You want to build products used by millions of users.