Full Stack Java Developer (Wilmington, DE)

Department: Software Development Services

Location: Wilmington, DE

Location: Wilmington, DE

Type: Full-Time, On-Site

Who We Are

At MAS Global Consulting, we are a premium digital engineering partner trusted by innovative startups and Fortune 100 companies, delivering high-impact solutions through agile delivery, deep technical expertise, and a strong people-first culture across the Americas.

We build long-term partnerships, not just software. MAS means “more” in Spanish, and that mindset drives our commitment to greater opportunity, inclusion, and impact.

Founded by a Latina engineer from Medellín and headquartered in Tampa, Florida, MAS Global Consulting is a 100% Hispanic and woman-owned company, recognized as a Great Place to Work and one of the Fastest-Growing Companies in the US.

Who You Are

We are looking for a Senior Java Full Stack Developer to join our growing engineering team. In this full-time, on-site role, you will design and build robust, scalable backend systems leveraging Java, Apache Kafka, and AWS. You will collaborate closely with cross-functional teams to deliver high-impact solutions for enterprise clients.

What You’ll Do

• Design, develop, and maintain high-performance backend services and distributed systems using Java.
• Architect and implement event-driven solutions using Apache Kafka, ensuring reliability, scalability, and low latency.
• Deploy, configure, and manage cloud infrastructure and services on AWS (e.g., EC2, ECS, Lambda, S3, RDS, SQS).
• Collaborate with stakeholders to gather requirements and translate them into scalable technical solutions.
• Develop and optimize RESTful APIs and backend application functionalities for high performance and responsiveness.
• Write and maintain automated tests (unit, integration, E2E) and ensure code quality through code reviews.
• Apply security best practices, including authentication and authorization mechanisms, to protect backend systems.
• Troubleshoot and resolve production issues, ensuring minimal downtime and operational stability.
• Mentor junior and mid-level engineers, promoting engineering best practices and a culture of continuous improvement.
• Collaborate with front-end, DevOps, and QA teams to ensure seamless integration and delivery of solutions.

What You Bring

• Bachelor's degree in Computer Science, Software Engineering, or a related field.
• 8+ years of professional experience in backend software development.
• Solid understanding of distributed systems, event-driven architecture, and messaging patterns.
• Experience with version control systems (e.g., Git) and agile development methodologies.
• Strong problem-solving skills and a track record of resolving complex production issues.
• Excellent communication skills and ability to work effectively in cross-functional teams.

Demonstrate strong, hands-on expertise in the following core areas:

Java: Core language proficiency (Java 11+), OOP, design patterns, multithreading, and performance optimization.

Amazon Web Services (AWS): Cloud infrastructure design and operations, including EC2, ECS, Lambda, S3, RDS, SQS, and strong JVM internals and concurrency knowledge.

Additionally:

Front-end Exposure: Hands-on experience with React or Angular, contributing to fullstack development and integration with backend services.

Nice to Have

• Spring Boot & Microservices: Experience building and deploying production-grade microservices using Spring Boot, Spring Cloud, and related frameworks (Eureka, API Gateway, Circuit Breaker).
• Apache Kafka: Event-driven architecture, producer/consumer configuration, topic partitioning, schema registry, and Kafka Streams or similar.
• Containerization & Orchestration: Familiarity with Docker and Kubernetes (EKS or similar).
• Observability: Experience with monitoring and tracing tools.
• CI/CD: Experience with Jenkins, GitHub Actions, or similar pipelines for automated testing and deployment.