Senior Back End Developer

About the job

About Onified.ai Onified.ai is building an intelligent, multi-tenant SaaS business suite for manufacturing enterprises—covering processes from marketing to order execution, supply chain, and operations. We’re building modern microservices on AWS with a strong focus on scalability, performance, and clean engineering practices. What you’ll do • Design, build, and own backend microservices using Java + Spring Boot. • Define clean service boundaries, APIs, and data contracts for a scalable microservices architecture. • Build and maintain REST APIs (versioning, validation, error handling, docs). • Design and optimize PostgreSQL schemas (indexes, constraints, migrations, performance tuning). • Set up and enforce backend best practices: coding standards, reviews, testing discipline, release hygiene. • Mentor a young team (1–2 years exp)—guide them on architecture, debugging, performance, and quality. • Implement multi-tenant SaaS patterns (tenant isolation, security, auditability). • Identify bottlenecks and improve latency, throughput, and reliability (profiling, caching, DB tuning). • Collaborate closely with frontend, DevOps, and product to deliver end-to-end features. Must-have skills • 2+ years of backend experience with Java + Spring Boot. • Strong fundamentals of microservices (communication patterns, failure handling, service design). • Strong PostgreSQL knowledge: schema design, indexing, query optimization, transactions. • Strong REST API design experience (auth, pagination, filtering, rate limits, validation). • Clear understanding of clean code, testing, and production-grade engineering. Good to have (nice if you’ve done some of these) • Spring Cloud patterns, API Gateway, service discovery, config management. • Async/event-driven systems: Kafka / RabbitMQ (or similar). • Redis caching, distributed locks, rate limiting. • Docker + basic Kubernetes understanding. • Observability: structured logs, metrics, tracing (OpenTelemetry/Grafana/etc.). • Security: JWT/OAuth2, RBAC/ABAC concepts, audit logs. • AWS experience (EKS/ECS, RDS, S3, IAM, CloudWatch). Why join us • Mentorship + leadership: You’ll be the experienced backbone guiding a young team. • Build from scratch: Real architecture ownership and long-term product impact. • Strong engineering culture: focus on best practices, performance, and scalable design. • Manufacturing-scale problems: complex workflows, high-volume operations, multi-plant contexts.

Requirements

• Java
• Spring Boot
• PostgreSQL
• REST APIs
• Microservices

Preferred Technologies

• Java
• Spring Boot
• PostgreSQL
• REST APIs
• Microservices