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Developer Java Web Sr
Job Location:
Job Location:
Washington, AR - USA
Monthly Salary:
Not provided by the employer
Monthly Salary:
Posted:
8 September 2026 (10 hours ago)
Posted:
Application Deadline:
6 December 2026
Application Deadline:
Vacancies:
1 Vacancy
Vacancies:
Job Summary
Labor Category / Position Title: Developer Java Web Senior / Sr. Backend Developer
Skill Set
Essential Duties & Responsibilities
(Other duties may be assigned)
Design develop and maintain enterprise-grade backend services and APIs supporting train consist management yard management equipment management scheduling and operational workflows.
Lead backend development efforts using Java Spring Boot REST APIs and event-driven architectures.
Design develop and support Kafka-based event-driven integrations producers consumers and messaging workflows.
Design and implement scalable integrations with internal and external systems using APIs messaging batch processes and data pipelines.
Perform code reviews mentor developers and promote engineering best practices across the team.
Develop and maintain high-quality secure and performant Java applications following enterprise standards.
Design and optimize PostgreSQL database models queries indexing strategies and data access patterns.
Develop and support batch processing scheduling data synchronization and reconciliation processes.
Collaborate with Product Owners Architects UX designers and business stakeholders to refine requirements and deliver scalable solutions.
Participate in application deployment release planning production support performance tuning and troubleshooting activities.
Contribute to cloud-native application development and CI/CD automation in AWS environments.
Ensure adherence to security compliance observability and operational excellence standards.
Minimum Qualifications:
Bachelors degree in Computer Science Information Systems Engineering or related field or equivalent practical experience.
8 years of hands-on experience developing enterprise applications using Java.
5 years of experience with Spring Boot REST APIs and microservice-based architectures.
3 years of hands-on experience developing solutions with Apache Kafka.
Experience designing event-driven architectures using Kafka and messaging platforms.
Experience building deploying and troubleshooting Kafka producers and consumers.
Understanding of Kafka topics partitions consumer groups offsets retries and message delivery patterns.
Strong experience designing and implementing integration solutions between enterprise systems.
Strong experience with PostgreSQL database design SQL optimization indexing data modeling and query tuning.
Experience building and consuming RESTful APIs and integrating with external systems.
Hands-on experience with AWS services such as:
o ECS/Fargate
o API Gateway
o Lambda
o S3
o CloudWatch
o Secrets Manager
o CloudFormation
o CodePipeline
o CodeBuild
o ECR
Experience with Angular and modern web application architectures.
Experience developing batch processing and scheduler-based applications.
Strong understanding of event-driven design domain-driven design and distributed system patterns.
Experience with CI/CD and DevOps practices using tools such as Git Jenkins Bitbucket Jira SonarQube and automated deployment pipelines.
Experience working in Agile/Scrum development environments.
Strong analytical troubleshooting communication and collaboration skills.
Preferred Qualifications:
Experience with transportation logistics railroad scheduling asset management or operational systems.
Experience with OAuth2/OIDC Azure Entra ID (Azure AD) SSO and application security best practices.
Experience supporting production applications in AWS cloud environments.
Experience with Dynatrace CloudWatch Splunk or similar monitoring and observability platforms.
Experience designing highly available and scalable enterprise solutions.
Kafka administration experience including topic management monitoring performance tuning and troubleshooting.
Experience with Schema Registry message serialization (Avro/JSON) and Kafka ecosystem tooling.
Experience with large-scale data ingestion reconciliation and operational reporting systems.
***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 Lumens client allowing the user access to the required systems and technology.***
Skill Set
Essential Duties & Responsibilities
(Other duties may be assigned)
Design develop and maintain enterprise-grade backend services and APIs supporting train consist management yard management equipment management scheduling and operational workflows.
Lead backend development efforts using Java Spring Boot REST APIs and event-driven architectures.
Design develop and support Kafka-based event-driven integrations producers consumers and messaging workflows.
Design and implement scalable integrations with internal and external systems using APIs messaging batch processes and data pipelines.
Perform code reviews mentor developers and promote engineering best practices across the team.
Develop and maintain high-quality secure and performant Java applications following enterprise standards.
Design and optimize PostgreSQL database models queries indexing strategies and data access patterns.
Develop and support batch processing scheduling data synchronization and reconciliation processes.
Collaborate with Product Owners Architects UX designers and business stakeholders to refine requirements and deliver scalable solutions.
Participate in application deployment release planning production support performance tuning and troubleshooting activities.
Contribute to cloud-native application development and CI/CD automation in AWS environments.
Ensure adherence to security compliance observability and operational excellence standards.
Minimum Qualifications:
Bachelors degree in Computer Science Information Systems Engineering or related field or equivalent practical experience.
8 years of hands-on experience developing enterprise applications using Java.
5 years of experience with Spring Boot REST APIs and microservice-based architectures.
3 years of hands-on experience developing solutions with Apache Kafka.
Experience designing event-driven architectures using Kafka and messaging platforms.
Experience building deploying and troubleshooting Kafka producers and consumers.
Understanding of Kafka topics partitions consumer groups offsets retries and message delivery patterns.
Strong experience designing and implementing integration solutions between enterprise systems.
Strong experience with PostgreSQL database design SQL optimization indexing data modeling and query tuning.
Experience building and consuming RESTful APIs and integrating with external systems.
Hands-on experience with AWS services such as:
o ECS/Fargate
o API Gateway
o Lambda
o S3
o CloudWatch
o Secrets Manager
o CloudFormation
o CodePipeline
o CodeBuild
o ECR
Experience with Angular and modern web application architectures.
Experience developing batch processing and scheduler-based applications.
Strong understanding of event-driven design domain-driven design and distributed system patterns.
Experience with CI/CD and DevOps practices using tools such as Git Jenkins Bitbucket Jira SonarQube and automated deployment pipelines.
Experience working in Agile/Scrum development environments.
Strong analytical troubleshooting communication and collaboration skills.
Preferred Qualifications:
Experience with transportation logistics railroad scheduling asset management or operational systems.
Experience with OAuth2/OIDC Azure Entra ID (Azure AD) SSO and application security best practices.
Experience supporting production applications in AWS cloud environments.
Experience with Dynatrace CloudWatch Splunk or similar monitoring and observability platforms.
Experience designing highly available and scalable enterprise solutions.
Kafka administration experience including topic management monitoring performance tuning and troubleshooting.
Experience with Schema Registry message serialization (Avro/JSON) and Kafka ecosystem tooling.
Experience with large-scale data ingestion reconciliation and operational reporting systems.
***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 Lumens 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.
Required Experience:
Senior IC
