Developer Java Web Senior-Sr Full Stack Developer

We’re looking for a Senior Software Engineer to design, build and run the backend services and event-driven integrations behind our operations apps. About 75 80% of the work is backend (Java, Spring Boot, Kafka). The other 20 25% is front-end work on our Angular apps.

What You ll Do (Other duties may be assigned):

• Design, build and maintain Spring Boot microservices (Java 17/21) that expose REST and reactive APIs.
• Build event-driven integrations with Spring Kafka, including producers and consumers, retries, dead-letter topics (DLTs), idempotency, ordering and handling messages that change format over time.
• Model and tune data access with Spring Data JPA, Hibernate and PostgreSQL.
• Build batch and scheduled jobs with Spring Batch.
• Make services resilient with Resilience4j (circuit breakers, retries, rate limiting), caching and health monitoring through Actuator.
• Secure services with Spring Security and OAuth2/JWT, and manage secrets through AWS Secrets Manager.
• Build and improve features in our Angular apps (about 20 25% of your time).
• Write strong unit and integration tests (JUnit 5, Spring Boot Test), and help with end-to-end tests in Playwright.
• Containerize services with Docker, deploy to AWS and own CI/CD with GitHub Actions and CodeBuild.
• Lead design reviews, mentor engineers, set coding standards and help support production systems.

Required Qualifications:

• Design, build and maintain Spring Boot microservices (Java 17/21) that expose REST and reactive APIs.
• Build event-driven integrations with Spring Kafka, including producers and consumers, retries, dead-letter topics (DLTs), idempotency, ordering and handling messages that change format over time.
• Model and tune data access with Spring Data JPA, Hibernate and PostgreSQL.
• Build batch and scheduled jobs with Spring Batch.
• Make services resilient with Resilience4j (circuit breakers, retries, rate limiting), caching and health monitoring through Actuator.
• Secure services with Spring Security and OAuth2/JWT, and manage secrets through AWS Secrets Manager.
• Build and improve features in our Angular apps (about 20 25% of your time).
• Write strong unit and integration tests (JUnit 5, Spring Boot Test), and help with end-to-end tests in Playwright.
• Containerize services with Docker, deploy to AWS and own CI/CD with GitHub Actions and CodeBuild.
• Lead design reviews, mentor engineers, set coding standards and help support production systems.

Preferred / nice to have (about 20 25% of the role):

• Angular (v15+, ideally the latest versions), TypeScript and RxJS.
• State management with NgRx.
• UI libraries such as PrimeNG, Angular Material and Tailwind CSS.
• Playwright or similar end-to-end test automation.
• Spring WebFlux and reactive programming.
• Schema Registry, Avro/JSON schemas or Amazon MSK.
• Experience in transportation, rail or logistics.

Tech stack

Java 17/21 Spring Boot Spring Kafka Spring Batch Spring Security/OAuth2 JPA/Hibernate PostgreSQL Resilience4j AWS Docker GitHub Actions Angular NgRx PrimeNG Tailwind Playwright

Java, Software Engineering, Web Programming, Software Engineering, Java, Web Programming, User Interface/Experience (UI/UX), Software Design, Application Programming Interface (API), REST (Representational State Transfer), A bachelor’s degree in Computer Science, Engineering or a related field, or equivalent experience., Lumen and / or its clients will not provide equipment (Laptop, monitor, etc.) to the selected contractor. The contractor must have their own equipment. Access to a virtual desktop set up (software) will be provided by Lumen s client, allowing the user access to the required systems and technology.

Lumen Solutions Group Inc. is an Equal Opportunity Employer and does not discriminate in employment on the basis of Minority/Gender/Disability/Religion/LGBTQI/Age/Veterans.