Software Development Engineer III - Backend Technologies

Opportunity :

As an Software Development Engineer III (Backend) at Hiver, you will work end-to-end across backend and AI systems to craft the next generation of collaborative email, automation, and AI-powered customer service workflows.

You will own major product surfaces, architect scalable systems, and bring intelligent experiences to life in the UI while ensuring reliability for 5M+ emails processed daily across thousands of active users.

Key Responsibilities : Backend, Distributed Systems & AI :

• Scale backend systems to handle rapidly growing traffic and AI workloads.

• Build low-latency inference and retrieval endpoints, caching layers, and model-serving pipelines.

• Improve reliability, resiliency, and performance across monolith and microservices environments.

• Work with Kafka/RabbitMQ to build high-volume, event-driven data flows.

• Partner with ML/AI teams to deploy embeddings, rerankers, RAG systems, and evaluation workflows.

Product Engineering :

• Ship features end-to-end across backend APIs, domain models, and data pipelines.

• Integrate AI suggestions, copilots, and retrieval-based workflows seamlessly into the product experience.

• Collaborate closely with design & product to deliver polished, consumer-grade UX.

Data, Security & Observability :

• Implement secure, compliant data handling for structured/unstructured customer data.

• Own observability across the stack tracing, metrics, dashboards, feature flags, SLOs.

• Lead debugging of complex issues across frontend, backend, infra, and model pipelines.

• Drive postmortems, root-cause analysis, and process improvements.

What we're looking for : Must Have :

• 5+ years building and scaling production systems end-to-end.

• Solid backend expertise in Go/Java/Python/RoR.

• Deep understanding of distributed systems, concurrency, performance, and resiliency.

• Experience with SQL plus familiarity with NoSQL/caches.

• Exposure to production model serving (embeddings, inference APIs).

• Strong fundamentals in cloud infra (AWS preferred), containers, and CI/CD.

Nice to Have :

• Prior experience building and shipping AI systems/features into production.