Full Stack Java Developers (CONTRACT ROLE)

Attadale Partners, LLC; Oregon (WI); Hybrid; USD 90,000 - 120,000; Full time

Job summary

Attadale Partners, LLC is seeking early-career Java Developers (1-3 years) for contractor roles to join our team in a Hybrid setup with location flexibility for US-based offices.

You will be embedded in cross-functional teams with business leaders, senior engineers, and ML engineers to transform legacy communications, data collection and reporting, and you will support existing systems during the transition.

Qualifications

• 1-3+ years of Java in production systems.

Responsibilities

• Embed in cross-functional teams with business leaders, senior engineers, and ML engineers to transform legacy communications and data reporting.
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Skills

Java 17/21

Spring Boot 3.x

Spring Security

REST API OpenAPI

JUnit 5 Mockito

TDD

AWS Lambda DynamoDB

Amazon Connect

Kafka MSK

CI/CD GitHub Actions

Agentic AI tooling

Tools

AWS

GitHub Actions

OpenAPI

Job description

PRINCIPLES ONLY; NO AGENCIES To help prevent fraudulent applications and identity theft, Attadale asks applicants to confirm they are authorized to work in the United States. Employment offers are contingent upon verification of work authorization and completion of required employment eligibility documentation. Any documents provided for verification will be used only for employment eligibility purposes and handled in accordance with applicable privacy and record?retention laws. This role is Hybrid, preference is given to the Chicago area, but we do offer location flexibility for other US-based office locations. All applicants must be US based, and is open to applicants already with the authority to work in the US. Unfortunately for these roles, we cannot sponsor new or transfer existing H-1B work visas. Attadale Partners, LLC is seeking to fill multiple Java Developer roles for early career Java Developers with 1-3 years of experience to join our team in a CONTRACTOR ROLE serving successful organizations and government agencies. As a management consulting firm, we are always looking for talented individuals to help improve our clients' business through technology. We have an opportunity to lead enterprise transformation roles including Agentic AI processes, cloud telephony, and integrated communication channels. In this role, you will be embedded in cross-functional teams with business leaders, senior engineers, and ML engineers to transform legacy business communications, data collection and analysis reporting. In addition, you will support the existing systems to ensure performance during the transition period. All applicants must be US based with a preference for Chicago-area applicants. These roles are open to applicants already with the authority to work in the US.

Requirements

CORE JAVA AND PLATFORM SKILLS:

• Java 17 / 21 LTS (records, sealed classes, pattern matching) - Expert
• Spring Boot 3.x (auto-config, actuators, profiles, DI) - Expert
• Spring Security, OAuth2 / OIDC - Advanced
• REST API & OpenAPI 3.x design - Expert
• Unit & Integration Testing ? JUnit 5, Mockito - Expert
• Test Driven Development (TDD) - Required
• AWS ? Lambda, DynamoDB - Advanced
• Amazon Connect / Contact Flows (Lambda handlers, Lex bots) - Preferred
• Kafka / Amazon MSK (event-driven microservices) - Proficient
• CI/CD ? trunk-based dev, GitHub Actions or equivalent - Advanced
• Agentic AI tooling ? LLM APIs, tool-use loops, LangChain4j - Preferred / Will train

EXPERIENCE REQUIREMENTS

• 1-3+ years professional Java in production systems
• 2+ years Agile; XP experience strongly preferred
• 1+ year AWS cloud-native (Lambda, ECS)
• TDD ? evidenced examples will be differentiators
• Event-driven microservices architecture

EXPERIENCE DIFFERENTIATORS INCLUDE:

• Amazon Connect integration built end-to-end
• Agentic AI or LLM workflow implementation
• Insurance, Financial Services, or regulated industry background
• Open-source contributions (Java ecosystem)
• Systems scaled to 100k+ concurrent sessions

XP ENGINEERING PRACTICES

• Pair programming daily ? driver/navigator rotation
• TDD: Red ? Green ? Refactor on all production code
• Trunk-based dev
• Collective code ownership ? no silos or fiefdoms
• One-week iterations with Friday demos

INTERPERSONAL COMPETENCIES

• Communicates technical concepts to non-technical stakeholders
• Gives and receives code review feedback constructively
• Thinks out loud; surfaces blockers early
• Cross-functional empathy ? understands agent/customer impact
• Mentorship orientation; shares knowledge freely

CERTIFICATION AND ASSESSMENTS

• AWS Certified Developer ? Associate (DVA-C02) - Preferred
• Spring Professional Certification (VMware / Broadcom) - Preferred
• AWS Certified Solutions Architect ? Associate (SAA-C03) - Advantageous
• AWS Certified Machine Learning ? Specialty (MLS-C01) - Advantageous

Interpersonal competencies are as important as the core technology skills.

Benefits

To help prevent fraudulent applications and identity theft, Attadale asks applicants to confirm they are authorized to work in the United States. Employment offers are contingent upon verification of work authorization and completion of required employment eligibility documentation. Any documents provided for verification will be used only for employment eligibility purposes and handled in accordance with applicable privacy and record?retention laws. This role is Hybrid, preference is given to the Chicago area, but we do offer location flexibility for other US-based office locations. All applicants must be US based, and is open to applicants already with the authority to work in the US. Unfortunately for these roles, we cannot sponsor new or transfer existing H-1B work visas. PRINCIPLES ONLY; NO AGENCIES