Kotlin Developer

Hybrid in Phoenix, AZ, US • Posted 13 hours ago • Updated 13 hours ago
Contract Independent
2 Years
No Travel Required
Hybrid
$60 - $70/hr
Fitment

Dice Job Match Score™

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Job Details

Skills

  • Docker
  • PostgreSQL
  • Python
  • Spring Framework
  • Kotlin
  • Artificial Intelligence
  • API

Summary

JOB DESCRIPTION:
We’re hiring a senior Kotlin/Spring Boot contractor to help own the execution backbone of a no-code workflow platform. This is not a simple CRUD service. The Orchestrator runtime is a multi-module system that receives workflow execution requests, persists durable state with Temporal, coordinates graph execution, integrates HTTP, agent, LLM, and human-review nodes, and safely executes increasingly AI-generated workflow graphs. You’ll join the squad responsible for the runtime layer that everything else depends on.
 
Responsibilities:
  • Design and harden the Kotlin/Spring Boot runtime that executes workflow graphs reliably in production.
  • Implement and improve Durable Execution Solutions 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 HTTP, 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.
 
Qualifications:
  • 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.
Employers have access to artificial intelligence language tools (“AI”) that help generate and enhance job descriptions and AI may have been used to create this description. The position description has been reviewed for accuracy and Dice believes it to correctly reflect the job opportunity.
  • Dice Id: 91134724
  • Position Id: 9006807
  • Posted 13 hours ago
Contact the job poster
KM

Kevin Mangan

Recruiter @ Next Gen IT Inc
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