Full Stack Java Developer

MAS Global Consulting•Wilmington, DE

1d•Onsite

About The Position

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. We are looking for a Mid Senior Backend 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.

Requirements

Bachelor's degree in Computer Science, Software Engineering, or a related field.
4+ 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.
Candidates must demonstrate strong, hands-on expertise in all three of the following: Java: Core language proficiency (Java 11+), OOP, design patterns, multithreading, and performance optimization.
Apache Kafka: Event-driven architecture, producer/consumer configuration, topic partitioning, schema registry, and Kafka Streams or similar.
Amazon Web Services (AWS): Cloud infrastructure design and operations, including EC2, ECS, Lambda, S3, RDS, SQS, and strong JVM internals and concurrency knowledge.

Nice To Haves

Spring Boot & Microservices: Experience building and deploying production-grade microservices using Spring Boot, Spring Cloud, and related frameworks (Eureka, API Gateway, Circuit Breaker).
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.

Responsibilities

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.