Principal Software Engineer — Scalable Data & AI Platform

Internetwork Expert; United States; Hybrid; USD 146,529 - 226,455; Full time

Job summary

Simple Machines is a boutique technology firm delivering data-driven platforms for global clients. Principal Software Engineer will lead hands-on backend, APIs, and cloud infrastructure across the full stack, collaborating with client stakeholders and internal teams.

The role emphasizes owning outcomes end-to-end in an Agile, hybrid setup with remote and in-person collaboration. Strong JVM (Kotlin/Java), API design, and large-scale web services experience are essential for success.

Qualifications

• Experience designing and implementing data-driven APIs.
• Background building large-scale web services.
• Strong SQL with schema design and performance considerations.
• Experience with automated testing (unit/integration; TDD/BDD preferred).

Responsibilities

• Design and build backend services for a highly scalable marketing platform.
• Own the design of APIs, applications, and supporting infrastructure.
• Document technical designs and requirements clearly for both internal teams and clients.
• Deliver solutions end-to-end: build, automate, deploy, operate, and support.
• Partner with clients and delivery teams to translate business requirements into robust technical solutions.
• Work within an Agile, iterative delivery model.
• Collaborate in a hybrid setup with both remote and in-person team members and stakeholders.

Skills

JVM development

API design

Data-driven APIs

Large-scale web services

SQL

Automated testing

React

TypeScript

Redux

Tailwind

Agile methodologies

Problem solving

Tools

Docker

Kubernetes

Terraform

CloudFormation

AWS

GCP

Azure

Ktor

RxJava

NoSQL (DynamoDB, Cassandra)

Job description

Simple Machines is a boutique technology firm delivering data-driven platforms for global clients. Principal Software Engineer will lead hands-on backend, APIs, and cloud infrastructure across the full stack, collaborating with client stakeholders and internal teams.

The role emphasizes owning outcomes end-to-end in an Agile, hybrid setup with remote and in-person collaboration. Strong JVM (Kotlin/Java), API design, and large-scale web services experience are essential for success.