Senior Full-Stack Software Developer (Java+React)

ELEKS; United States; On-site; USD 140,000 - 190,000; Full time

Job summary

ELEKS seeks a Senior Full-Stack Developer to lead design and development of secure, scalable enterprise applications using Java, Spring Boot, Spring Security, and ReactJS.

You will build application frameworks, implement modern authentication with OAuth2/JWT/SAML/OpenID Connect, and mentor the team while delivering robust REST APIs and responsive UIs.

Qualifications

• Bachelor’s degree in computer science, Engineering, or a related field.
• 8+ years of hands-on software development experience.
• Experience implementing OAuth2, JWT, SAML, and OpenID Connect.
• Experience with SQL Server and relational database design.
• Experience with Azure Red Hat OpenShift (ARO) and cloud-native deployments.
• Demonstrated ability to build and secure Spring Boot applications from scratch.

Responsibilities

• Design, develop, and support enterprise applications using Java, Spring Boot, and ReactJS.
• Establish and maintain Spring Boot application frameworks, including architecture, security, logging, exception handling, and API standards.
• Implement enterprise security solutions using Spring Security, OAuth2, JWT, SAML/OpenID Connect, Azure AD SSO, and RBAC.
• Develop and maintain REST APIs and microservices.
• Build responsive and intuitive user interfaces using ReactJS.
• Integrate front-end applications with secure backend services.
• Support CI/CD pipelines, code reviews, performance tuning, and production support.
• Mentor team members and promote development best practices.

Skills

Java

Spring Boot

Spring Security

ReactJS

OAuth2

JWT

SAML

OpenID Connect

SQL Server

Relational database design

Azure Red Hat OpenShift

Cloud-native deployments

Education

Bachelor's degree in computer science, Engineering, or related field

Tools

Docker

Kubernetes

Kafka/RabbitMQ

Redis

Elasticsearch

Azure DevOps

Jenkins

CI/CD

API Gateway

OpenAPI/Swagger

Azure AD integration

Job description

We are looking for a Senior Full -Stack Developer to lead the design and development of secure, scalable enterprise applications. The ideal candidate will have deep expertise in Java, Spring Boot, Spring Security, and ReactJS, with proven experience building application frameworks from the ground up and implementing modern authentication and authorization solutions.

REQUIREMENTS

• Bachelor’s degree in computer science, Engineering, or a related field
• 8+ years of hands-on software development experience
• Experience implementing OAuth2, JWT, SAML, and OpenID Connect
• Experience with SQL Server and relational database design
• Experience with Azure Red Hat OpenShift (ARO) and cloud-native deployments
• Demonstrated ability to build and secure Spring Boot applications from scratch

PREFERRED

• Experience with Docker, Kubernetes, Kafka/RabbitMQ, Redis, and Elasticsearch
• Familiarity with Azure DevOps, Jenkins, and CI/CD practices
• Knowledge of API Gateway technologies and OpenAPI/Swagger
• Experience integrating with Azure AD or other enterprise identity providers
• Financial Services, Healthcare, or Insurance domain experience is a plus
• Java, Spring, or Azure certifications preferred

RESPONSIBILITIES

• Design, develop, and support enterprise applications using Java, Spring Boot, and ReactJS
• Establish and maintain Spring Boot application frameworks, including architecture, security, logging, exception handling, and API standards
• Implement enterprise security solutions using Spring Security, OAuth2, JWT, SAML/OpenID Connect, Azure AD SSO, and Role-Based Access Control (RBAC)
• Develop and maintain REST APIs and microservices
• Build responsive and intuitive user interfaces using ReactJS
• Integrate front-end applications with secure backend services
• Support CI/CD pipelines, code reviews, performance tuning, and production support
• Mentor team members and promote development best practices

WHAT YOU WILL GET WITH ELEKS

• Close cooperation with a customer
• Challenging tasks
• Ability to influence project technologies
• Team of professionals
• Dynamic environment with low level of bureaucracy

ELEKS is a custom software development company. We deliver value to our clients, thanks to our expertise and experience gained from working as a software innovation partner since 1991.

Our 2000+ professionals located in the Delivery Centers across Eastern Europe and sales offices in Europe and North America, provide our clients with a full range of software engineering services. These include product development, QA, R&D, design, technology consulting and dedicated teams.