Full Stack Java Developers

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 as a contractor. The role involves embedded cross‑functional collaboration with business leaders, senior engineers, and ML engineers to transform legacy business communications, data collection, and reporting, while supporting existing systems during transition.

This role is hybrid; preference is given to the Chicago area but offers location flexibility for other U.S.–based office locations. All applicants must be U.S. based and authorized to work in the United States. We cannot sponsor or transfer H‑1B work visas.

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.

• 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, Dynamo
  
  DB - Advanced
• Amazon Connect / Contact Flows (Lambda handlers, Lex bots) - Preferred
• Kafka / Amazon MSK (event‑driven microservices) - Proficient
• CI/CD — trunk‑based dev, Git Hub Actions or equivalent - Advanced
• Agentic AI tooling — LLM APIs, tool‑use loops, LangChain4j - Preferred / Will train

• 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

• 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

• 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

• 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

• 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.

Not a perfect match? If you are a strong Java engineer who is curious about AI, comfortable in XP, and wants to work on systems that matter to millions of customers — we encourage you to apply.