[Hiring] Senior Java Web Developer @Lumen Solutions Group Inc.

Role Description

• 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.

Qualifications

• Bachelor's 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:
• ECS/Fargate
• API Gateway
• Lambda
• S3
• CloudWatch
• Secrets Manager
• CloudFormation
• CodePipeline
• CodeBuild
• 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.

Requirements

• 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.

Benefits

• ***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.***

Company Description

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.