Developer Java Web Senior-Sr Full Stack Developer

Lumen Solutions Group, Inc.Washington, DC

Overview

Remote

On-site

Job Description

Labor Category / Position Title Developer Java Web / Sr Full Stack Developer Skill Set About the role: 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 Education 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.

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FAQs About Developer Java Web Senior-Sr Full Stack Developer Jobs at Lumen Solutions Group, Inc.

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This job at Lumen Solutions Group, Inc. is located in Washington, DC, according to the details provided by the employer. Some roles may also include multiple work locations depending on the requirement.

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