Full Stack Senior Java Developer

Attadale Partners, LLC is seeking to fill multiple Java Developer roles for experienced Senior Developers with 4-6 years of experience to join our team 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, . 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.

This role can be remote and 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.

We are serve large commercial clients in the financial services and health care, assisting them to transform and modernize their business operations across three pillars: agentic AI workflows, Amazon Connect telephony automation, and expanded self-service for agents and customers. We practice Extreme Programming (XP) — pair programming, TDD, and continuous integration are how we work every day. This is a day-one contributor role; minimum ramp-up time is expected.

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
• Spring Data JPA / Hibernate (query tuning, N+1 awareness) - Advanced
• Reactive Programming — WebFlux / Project Reactor - Proficient
• REST API & OpenAPI 3.x design - Expert
• Unit & Integration Testing — JUnit 5, Mockito, TestContainers - Expert (TDD required)
• AWS — ECS/EKS, Lambda, SQS/SNS, RDS Aurora, 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

• 5+ years professional Java in production systems
• 2+ years Agile; XP experience strongly preferred
• 1+ year AWS cloud-native (Lambda, ECS, SQS, Aurora)
• Demonstrable TDD — evidenced in GitHub, not self-attested
• Event-driven microservices architecture

EXPERIENCE DIFFERENTIATORS INCLUDE:

• Amazon Connect integration built end-to-end
• Agentic AI or LLM workflow implementation
• Insurance, FinServ, 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; short-lived branches (hours, not days)
• 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

• Oracle Certified Professional: Java SE 17 or 21 Developer (OCP) - Required*
• 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

Work is remote and preference is given to applicants located in the Chicago area.

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 policyholders — we encourage you to apply.

Benefits

Attadale offers competitive salaries commensurate with experience, performance bonus, generous paid time off, BCBS healthcare, 401(k) matching, profit sharing, dependent care accounts, and other benefits. However, more importantly, you will be mentored by experienced staff to help you fulfill your career aspirations and goals. We offer a great work/life balance, collegial team mates, and interesting work to stretch your skills and capabilities.

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 customers — we encourage you to apply.