Senior Kotlin/Spring Runtime Engineer - No-Code Workflows

WaferWire Cloud Technologies; Phoenix (AZ); On-site; USD 110,000 - 125,000; Full time

Benefits offered by this job

Medical

Dental

Vision

Life

PTO

Holidays

401(k)

Job summary

WaferWire Cloud Technologies is hiring a Senior Kotlin/Spring Boot Engineer to join a contractor squad that builds the orchestration layer for a no-code workflow platform. You will design a resilient runtime that handles graph execution, state durability with Temporal, and integration across HTTP, agents, LLM, and human-review nodes.

The role emphasizes contract-first APIs, retries and recovery, and working across multi-module Gradle projects with Kotlin and Python components.

Qualifications

• 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.

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 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.

Skills

Spring Boot

Temporal

Kotlin

Gradle

PostgreSQL

Docker Compose

Test containers

Micrometer

Contract-first API design

Distributed systems

Tools

Docker Compose

PostgreSQL

Job description

WaferWire Cloud Technologies is hiring a Senior Kotlin/Spring Boot Engineer to join a contractor squad that builds the orchestration layer for a no-code workflow platform. You will design a resilient runtime that handles graph execution, state durability with Temporal, and integration across HTTP, agents, LLM, and human-review nodes.

The role emphasizes contract-first APIs, retries and recovery, and working across multi-module Gradle projects with Kotlin and Python components.