Principal Engineer
First seen by Alion on Aug 25, 2026.
Job Description :
We are looking for a highly skilled Java Expert who combines strong architecture and design capabilities with a hands-on approach to coding.
The ideal candidate is deeply experienced in Java / Jakarta EE, Domain-Driven Design (DDD), and Cloud-Native Systems, with the ability to design and implement scalable, high-performing, and maintainable enterprise solutions.
This role requires a strategic thinker who can define architectural blueprints while remaining deeply involved in the technical implementation - mentoring teams, driving best practices, and solving complex engineering challenges.
Key Responsibilities :
- Design, architect, and implement enterprise-grade applications using Java SE (11-21) and Jakarta EE frameworks.
- Develop and review detailed architecture and design documents aligning with best practices in scalability, maintainability, and performance.
- Apply Domain-Driven Design (DDD) principles to model complex business domains effectively.
- Build microservices-based, event-driven, and cloud-native architectures leveraging AWS, Azure, or GCP.
- Ensure system reliability and resilience in distributed system environments.
- Lead and mentor development teams on design patterns, coding standards, and modern software practices.
- Collaborate with product owners, business stakeholders, and cross-functional teams to translate business needs into robust technical solutions.
- Evaluate and integrate emerging technologies to improve system performance and scalability.
- Participate in code reviews and maintain high standards of code quality and technical excellence.
Required Skills & Qualifications :
- 9+ years of professional experience in Java and Jakarta EE development.
- Strong command of Java SE (11-21) and Jakarta EE technologies including : JPA, CDI, EJB, JAX-RS, and Jakarta EE containers (e.g., WebSphere Liberty, Payara, WildFly).
- Proven expertise in microservices architecture, domain-driven design (DDD), and distributed systems.
- Hands-on experience with cloud platforms (AWS, Azure, or GCP) and containerization/orchestration (Docker, Kubernetes).
- Excellent understanding of event-driven architectures, messaging systems (Kafka, RabbitMQ), and API design (RESTful / GraphQL).
- Proficiency in CI/CD pipelines, DevOps practices, and modern development workflows (Git, Jenkins, etc.).
- Strong analytical, problem-solving, and debugging skills.
- Excellent communication and leadership skills, with the ability to guide teams and influence stakeholders.
Good to Have :
- Experience with Reactive frameworks (e.g., Spring WebFlux, Quarkus, or Micronaut).
- Exposure to NoSQL databases (MongoDB, Cassandra) and in-memory data grids (Hazelcast, Redis).
- Knowledge of security frameworks and OAuth2 / OpenID Connect.
- Familiarity with Observability tools (Prometheus, Grafana, ELK Stack).
Skills
Java, J2EE, AWS, Microservices Architecture, JPA, Distributed Systems, Kafka, GraphQL, WebSphere