Senior Java Developer

Ethereum Technologies LLC; Dallas (TX); On-site; USD 83,000 - 118,000; Full time

Job summary

Ethereum Technologies in Dallas is seeking a Senior Java Developer to design and build scalable backend systems. You will lead development of microservices with Spring Boot, implement secure REST APIs, and drive cloud-native deployments on Kubernetes.

Experience with Kafka, cloud platforms, and AI integrations is essential. You will collaborate with cross-functional teams in an Agile setup, participate in architecture discussions, and ensure high performance and reliability of distributed

Qualifications

• 8+ years of hands-on Java/J2EE development experience.
• Proficient with Java 17/21 and modern Java features.
• Expertise in Spring Boot, Spring Framework, Spring Security, and Spring MVC.
• Strong REST API and microservices design experience.
• Experience with Hibernate, JPA, ORM frameworks.
• Solid SQL knowledge across PostgreSQL/MySQL/Oracle.
• Proficient with Kafka and event-driven architectures.
• Hands-on Docker and Kubernetes experience, cloud platforms (AWS/Azure/GCP).
• CI/CD expertise (Jenkins, GitHub Actions, GitLab CI).
• Familiar with Git, Maven/Gradle, and Agile/Scrum methodologies.
• Unit testing with JUnit 5, Mockito, and Testcontainers.

Responsibilities

• Design, develop, and maintain scalable enterprise Java applications.
• Build and deploy microservices using Java and Spring Boot.
• Develop secure REST APIs and integrate third-party services.
• Implement event-driven solutions using Kafka and messaging systems.
• Optimize application performance, scalability, and reliability.
• Develop cloud-native applications and deploy with Kubernetes.
• Integrate Generative AI and LLM capabilities into enterprise Java apps.
• Implement AI-powered workflows, RAG pipelines, and MCP-based integrations.
• Participate in code reviews, architecture discussions, and technical design sessions.
• Collaborate with cross-functional teams in Agile environments.

Skills

Java/J2EE

Java 21

Java 17

Spring Boot

Spring Framework

Spring Security

REST APIs

Microservices

Hibernate/JPA

SQL databases

Apache Kafka

Docker

Kubernetes

Cloud platforms

CI/CD

Git

Maven/Gradle

Agile/Scrum

JUnit/Mockito/Testcontainers

LangChain4j

Spring AI

RAG

MCP

Redis

OpenTelemetry

OAuth 2.0/JWT

Tools

Jenkins

GitHub Actions

GitLab CI

Maven

Gradle

Job description

Job Title: Senior Java Developer

Location: Dallas TX

Duration: 11 Months + Extension

Bill Rate: $73/hour (C2C)

Job Type: W-2, 1099, C2C

Client: To Be Discussed Later

Work Authorization: US Citizen, Green Card, OPT-EAD, CPT, H-1B, H4-EAD, Other

Job Description:

We are looking for an experienced Senior Java Developer with strong expertise in enterprise application development, microservices architecture, cloud technologies, and modern AI integration. The ideal candidate should have hands‑on experience designing scalable backend applications and developing secure, high-performance distributed systems.

Required Skills:

• 8+ years of hands‑on experience in Java/J2EE development.
• Strong experience with Java 17/21 and modern Java features.
• Expertise in Spring Boot, Spring Framework, Spring Security, and Spring MVC.
• Strong experience developing RESTful APIs and microservices architecture.
• Experience with Hibernate, JPA, and ORM frameworks.
• Strong knowledge of SQL, PostgreSQL, MySQL, and Oracle databases.
• Experience with Apache Kafka, event-driven architecture, and messaging systems.
• Hands‑on experience with Docker, Kubernetes, and containerized applications.
• Experience with AWS, Azure, or GCP cloud platforms.
• Strong experience with CI/CD pipelines using Jenkins, GitHub Actions, or GitLab CI.
• Experience with Git, Maven, Gradle, and Agile/Scrum methodologies.
• Knowledge of unit testing and automation using JUnit 5, Mockito, and Testcontainers.

Recent / Modern Skills (2025-2026)

• Java 21 and modern Java development.
• Spring Boot 3.x and Spring Framework 6.
• Spring AI for integrating LLMs into Java applications.
• LangChain4j for building LLM-powered Java applications.
• Generative AI and LLM integration (OpenAI, Azure OpenAI, AWS Bedrock).
• Retrieval-Augmented Generation (RAG) and vector databases.
• AI Agent and tool-calling integration.
• Model Context Protocol (MCP) integration and MCP server development.
• Redis and distributed caching.
• Kubernetes, Helm, and cloud-native application deployment.
• Observability using OpenTelemetry, Prometheus, and Grafana.
• Secure API development using OAuth 2.0 and JWT.

Responsibilities:

• Design, develop, and maintain scalable enterprise Java applications.
• Build and deploy microservices using Java and Spring Boot.
• Develop secure REST APIs and integrate third‑party services.
• Implement event-driven solutions using Kafka and messaging platforms.
• Optimize application performance, scalability, and reliability.
• Develop cloud-native applications and deploy them using Kubernetes.
• Integrate Generative AI and LLM capabilities into enterprise Java applications.
• Implement AI‑powered workflows, RAG pipelines, and MCP-based integrations where applicable.
• Participate in code reviews, architecture discussions, and technical design sessions.
• Collaborate with cross‑functional teams in Agile development environments.

Preferred Qualifications:

• Experience with React.js or Angular.
• Experience with GraphQL.
• Knowledge of system design and distributed architecture.
• Experience with financial services, healthcare, or enterprise domains.
• Familiarity with DevSecOps and application security best practices.

We are an equal opportunity employer. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, national origin, citizenship/ immigration status, veteran status, or any other status protected under federal, state, or local law.