Senior Full-Stack Developer: React & Java Microservices

CI&T; United States; Remote; USD 120,000 - 180,000; Full time

Benefits offered by this job

Health and dental insurance

Meal and food allowance

Childcare assistance

Extended paternity leave

Wellhub (Gympass) TotalPass;

Profit Sharing and Results Participa…

Job summary

CI&T seeks a Senior-Master Full-Stack Developer with strong React and Java/Spring Boot expertise to design, build, and support enterprise-scale web applications and microservices that are performant, secure, and user-centric.

You will collaborate with UX/UI, product, architecture, and QA teams in an Agile environment, create and maintain documentation, and ensure code quality, performance, and security across the stack (OAuth2, OIDC, JWT). EST-friendly on-call rotations apply.

Qualifications

• Solid experience with full-stack development.
• Strong hands-on experience with React, modern JavaScript (ES6+), DOM APIs, and JSON.
• Proficient in backend development with Java, including Spring Boot; recent hands-on experience is required.
• Experience with microservices and enterprise integration patterns.
• Solid experience with MySQL and SQL.
• Good understanding of web security standards including JWT and OAuth2.
• Excellent problem-solving and communication skills.
• Structured approach to problem solving and clear communication.
• Comfortable working in the EST time zone.

Responsibilities

• Design, develop, unit test, and integrate full-stack components.
• Build scalable web applications using React frontend and Java 21/Spring Boot backend.
• Implement RESTful APIs, microservices, and integrations with enterprise systems.
• Collaborate with UX/UI, product, architecture, and QA in Agile environments.
• Create and maintain architecture, design, and system documentation.
• Ensure code quality, performance, and security (OAuth2, OIDC, JWT).
• Work with MySQL/Hibernate/Spring Data/Spring Security.
• Support production systems, monitor and troubleshoot applications.

Skills

Full-stack

React

Java

Spring Boot

Microservices

SQL

Security

On-call

Tools

Kibana

APM tools

MySQL

Hibernate

Spring Data

OAuth2

OIDC

JWT

Job description

CI&T seeks a Senior-Master Full-Stack Developer with strong React and Java/Spring Boot expertise to design, build, and support enterprise-scale web applications and microservices that are performant, secure, and user-centric.

You will collaborate with UX/UI, product, architecture, and QA teams in an Agile environment, create and maintain documentation, and ensure code quality, performance, and security across the stack (OAuth2, OIDC, JWT). EST-friendly on-call rotations apply.