Software Development Engineer III
First seen by Alion on Sep 17, 2026.
Opportunity :
As an Software Development Engineer III (Full Stack) at Hiver, you will work end-to-end across frontend, 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 :
Full-Stack Product Engineering :
- Build intuitive, performant UIs in React/Next.js for email collaboration, analytics, and AI-assisted workflows.
- Ship features end-to-end across frontend, 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.
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.
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.
- Strong proficiency in React/Next.js + TypeScript.
- Solid backend expertise in Go/Java/Python.
- Deep understanding of distributed systems, concurrency, performance, and resiliency.
- Experience with SQL plus familiarity with NoSQL/caches.
- Exposure to production model serving (embeddings, RAG, inference APIs).
- Strong fundamentals in cloud infra (AWS preferred), containers, and CI/CD.
Nice to Have :
- Experience with vector databases (pgvector, Pinecone, OpenSearch).
- Familiarity with vLLM, Triton, TorchServe, or model quantization.
- OpenTelemetry, feature flag platforms, A/B testing systems.
- Prior experience building B2B SaaS or email/collaboration products.
Skills
React.js, Next.js, TypeScript, Python, Java, AWS, Kafka, SQL, Golang, Full Stack