Hands-on Java Architect: Microservices, Cloud & React Lead

Apexon; St. Louis (MO); On-site; USD 150,000 - 190,000; Full time

Job summary

Apexon in St. Louis, MO is seeking a hands-on Java Architect with deep expertise in Java, Spring Boot, microservices, React and TypeScript to design and build scalable, secure enterprise apps.

You will lead architecture, drive API-first designs, oversee backend and frontend teams, and mentor engineers while delivering high-performance, resilient systems. Ideal candidates bring 10+ years software experience and strong enterprise architecture.

Qualifications

• 10+ years in software engineering with large-scale systems.
• 7+ years hands-on Java/Spring development.
• 5+ years API and microservices architecture.
• 3+ years React and TypeScript development.
• Strong enterprise architecture and leadership skills.

Responsibilities

• Lead architecture, design, and development of enterprise applications.
• Drive API-first, microservices, distributed systems, and event-driven architectures.
• Provide technical leadership across backend and frontend teams.
• Design and develop scalable backend services with Java 17/21 and Spring Boot.
• Build REST APIs, integrations, messaging, and asynchronous services.
• Lead frontend architecture using React and TypeScript.
• Ensure performance, scalability, availability, accessibility, and security.
• Participate in architecture reviews, production readiness, troubleshooting.
• Drive security-by-design and cloud transformation initiatives.
• Support modernization and cloud transformation efforts.

Skills

Java

Spring Boot

Microservices

React

TypeScript

API Design

Security

Distributed Systems

Cloud Transformation

Tools

OpenAPI/Swagger

PostgreSQL

OAuth2

JWT/OIDC

REST API

JUnit

Mockito

REST Assured

Job description

Apexon in St. Louis, MO is seeking a hands-on Java Architect with deep expertise in Java, Spring Boot, microservices, React and TypeScript to design and build scalable, secure enterprise apps.

You will lead architecture, drive API-first designs, oversee backend and frontend teams, and mentor engineers while delivering high-performance, resilient systems. Ideal candidates bring 10+ years software experience and strong enterprise architecture.