Sr. Java Developer

Role: Sr. Java Developer                  

Location: Onsite at Columbus ,Ohio and no remote. 

Type: Contract-to-hire

Openings: 2
Dates: Nov 30, 2026 – Mar 9, 2027 (goal is to convert after this contract)

Sponsorship: Not available

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What we're looking for:

• A senior Java developer building cloud-native microservices: Java (8/11/17/21) and Spring Boot are must-haves, with 5 years of hands-on Java development.

• Google Cloud Platform and Kafka are core to the role: cloud-native development on Google Cloud Platform and event-driven solutions with Kafka.

• Google Cloud Bigtable or similar NoSQL, REST API design and security, and CI/CD/DevOps (Git, Maven, Jenkins, GitHub Actions, IaC).

• React and Node.js UI experience is part of the stack.

• Pluses: Digital assets, tokenization, digital wallets or payment platforms; Fraud Technology; Google Cloud Platform products like Cloud Run, Terraform and BigQuery; Docker/Kubernetes.

Job Description:

We are seeking a highly skilled Senior Java Developer with expertise in Java, Spring Boot, React, Node.js UI/UX, Google Cloud Platform, Kafka, Cloud Architecture, Bigtable, REST APIs, and DevOps to design, develop, and support scalable cloud-native applications. The ideal candidate will have strong experience building microservices, event-driven solutions, and distributed systems in a cloud environment. Knowledge of Digital Assets and Tokenization platforms is a plus.

• Deliver well-designed, quality software in either an agile or waterfall environment.

• Work on a team to ensure successful delivery of solutions that add value to colleagues and customers as well as achieve business objectives.

• Understand business requirements.

• Communicate clearly with business and technology stakeholders to develop a proposed solution.

• Be the primary technical team owner of projects and project technical deliverables.

Duties and Responsibilities:

• Develop and maintain cloud-native applications using Java, Spring Boot, Google Cloud Platform, and Kafka.

• Build and support scalable REST APIs.

• Develop event-driven solutions leveraging Kafka and cloud-native messaging patterns.

• Design data models and optimize performance using Bigtable and related cloud databases.

• Understand and work with CI/CD pipelines and DevOps best practices.

• Collaborate with architecture, infrastructure, security, and product teams to deliver enterprise-grade solutions.

• Participate in code reviews, design discussions, and technical mentoring activities.

• Maintain and demonstrate knowledge of technical industry trends, particularly as they apply to Isoft

• Perform other duties as assigned.

Basic Qualifications:

• Bachelor's degree in Computer Science, Information Systems, Business or other related field/experience.

• 5 years of hands-on experience in Java application development.

• Strong proficiency in Java 8/11/17/21 and Spring Boot Framework for building scalable microservices, REST APIs and distributed applications.

• Strong understanding of RESTful API design, development, security, and integration.

• Experience with Google Cloud Platform (Google Cloud Platform) services and cloud-native application development.

• Hands-on experience with Apache Kafka for event-driven and asynchronous processing.

• Experience working with Google Cloud Bigtable or similar NoSQL databases.

• Solid understanding of Cloud Architecture principles, including scalability, resiliency, high availability, and fault tolerance.

• Hands-on experience with DevOps practices, including CI/CD pipelines, Infrastructure as Code (IaC), automated testing, deployment automation, and monitoring.

• Proficiency with Git, Maven, Jenkins, GitHub Actions, or similar development tools.

• Experience with unit testing, integration testing, and automated quality practices.

• Strong troubleshooting, debugging, and performance tuning skills.

• Experience working in Agile/Scrum development environments.

• Strong analytical, troubleshooting, and problem-solving skills.

Preferred Qualifications:

• Knowledge of cloud security, authentication, authorization, and API gateway technologies, including JWT.

• Experience with containerization and orchestration technologies such as Docker and Kubernetes.

• Familiarity with observability tools, including logging, monitoring, and distributed tracing solutions.

• Hands-on experience with Google Cloud Platform products like Cloud Run, Terraform, Big Data and BigQuery.

• Experience with J2EE, Web Services, JAX-RS, Swagger and API testing tools.

• Knowledge of SQL and RDBMS (Oracle, MySQL, DB2), including queries, stored procedures and triggers.

• Experience with data structures and algorithms for time and memory complexity reduction.

• Experience with Fraud Technology.

• Expert understanding of agile concepts; working knowledge of Scrum and Kanban delivery frameworks.

• Excellent written and verbal communication skills, with the ability to explain technical concepts clearly to peers and leadership.

• Highly motivated, able to work in a fast-paced environment and handle multiple priorities.

Nice-to-Have:

• Knowledge of Digital Assets, tokenization, digital wallets, blockchain-based ecosystems, or digital payment platforms.

• Experience integrating with financial services platforms, payment networks, or digital asset custody solutions.

• Understanding of digital asset lifecycle management, tokenized deposits, and emerging digital banking technologies.

• Proactive in leveraging approved AI-assisted development tools to improve solution design, code quality, testing, documentation, and delivery efficiency, while ensuring data security, regulatory compliance, and engineering accountability.