Senior Full-Stack Developer - Java/Spring & React

mthree; New Jersey; On-site; USD 140,000 - 170,000; Full time

Job summary

mthree is seeking a highly motivated Full‑Stack Developer to help build and enhance platforms supporting global post‑trade operations. You will design, develop, and modernize microservices using Java/Spring Boot and deliver full‑stack features from React UI to Java services.

This role targets engineers with 5+ years of experience who thrive in fast environments, focusing on resilient, scalable code, CI/CD practices, and production readiness.

Qualifications

• 5+ years of experience in full‑stack development.
• Strong Java backend skills with API design and concurrency basics.

Responsibilities

• Design, develop, and maintain microservices and distributed systems using Java, Spring Boot, and related frameworks.
• Deliver full‑stack features end‑to‑end (React UI → Java services → data).
• Build reliable APIs and event‑driven workflows; participate in code reviews.
• Troubleshoot using logs/metrics/traces and apply root‑cause fixes.
• Ensure production‑ready, secure, high‑quality code and support deployments.
• Hands‑on experience with system design, testing, and operational stability.
• Work with CI/CD, application resiliency, and security practices.

Skills

Java backend

React/TypeScript

Spring Boot

Microservices

API Design

Kafka/RMQ

Tools

Cassandra

CI/CD

Job description

mthree is seeking a highly motivated Full‑Stack Developer to help build and enhance platforms supporting global post‑trade operations. You will design, develop, and modernize microservices using Java/Spring Boot and deliver full‑stack features from React UI to Java services.

This role targets engineers with 5+ years of experience who thrive in fast environments, focusing on resilient, scalable code, CI/CD practices, and production readiness.