Senior Kotlin/Spring Boot Engineer

Solution IT Inc. is looking for Senior Kotlin/Spring Boot Engineer for one of its clients in Phoenix, AZ

Job Title: Senior Kotlin/Spring Boot Engineer

Responsibilities:

• Design and harden the Kotlin/Spring Boot runtime that executes workflow graphs reliably in production.
• Implement and improve Temporal.io workflows, activities, signals, queries, retries, and recovery paths.
• Strengthen contract-first APIs and shared contracts.
• Own failure-mode thinking across distributed execution retries, idempotency, partial failure, replay safety, pause/resume, and graceful degradation.
• Work across node types, including agentic tool-calling, LLM, and human-in-the-loop review nodes.
• Improve integration coverage using Test containers and layered Docker Compose profiles.
• Collaborate closely with Composer and AI/KB teams on execution semantics and runtime behavior.
• Write clear operational documentation and runbooks for a reliability-critical service.

Required Skills:

• Strong production Kotlin backend experience.
• Strong Spring Boot experience in distributed systems or platform services.
• Hands-on Temporal experience in production.
• Strong understanding of workflow durability, retries, idempotency, and recovery design.
• Experience with multi-module Gradle codebases and contract-first API design.
• Experience with JPA/Hibernate and PostgreSQL.
• Experience with Docker Compose/Test containers integration testing.
• Comfort debugging multi-service systems with mixed Kotlin and Python components.
• Experience with observability tools like micrometer
• Experience with contract first development

Strong Pluses:

• Experience with DAG/workflow/orchestration engines.
• Experience with AI/LLM/agent runtimes or other non-deterministic execution systems.
• Familiarity with FastAPI-based workers and cross-language integration.
• Experience with auth/token provider abstractions, OAuth2/JWT, or cached token acquisition.
• Experience writing operational docs, runbooks, and reliability guidance.

Work Site: Phoenix, AZ (Day 1 onsite)

Duration: Long term

Expected Start Date: Immediate

Number of Positions: 01

Please send your responses back to [email protected]

Thanks

Recruiting Team

SOLUTION IT INC

Work: 781-503-1700 / Extn 139 / 150

URL:
Confidentiality Notice: The material in this e-mail is intended only for the use of the individual to whom it is addressed and may contain information that is confidential, privileged, and exempt from disclosure under applicable law. If you are not the intended recipient(s), be advised that the unauthorized use, disclosure, copying, distribution, or the taking of any action in reliance on this information is strictly prohibited. If you have received this e-mail in error, please immediately contact the sender by reply email and destroy all copies of the original message. Thank you.

Under Bill s.1618 Title III passed by the 105th U.S. Congress this mail cannot be considered as "spam" as long as we include contact information and a remove link for removal from our mailing list. In order to not be in the recipients-list for this mail, please reply to us with "REMOVE" either in the subject or in the mail body. Please include all pertinent email addresses. Our apologies for any inconveniences caused by this mail.

Click here to remove from our mailing list.
Solution IT, Inc, 60E Concord St, Wilmington, MA 01887 Phone: 781-503-1700 Fax: (781) 503-1650