Senior Software Engineer, Integrations

Mashgin•Chicago, IL

1d•$115,000 - $210,000•Hybrid

About The Position

Mashgin is seeking a highly technical Senior Software Engineer, Integrations to join their team. This role involves building high and low-level software to connect Mashgin's autonomous checkout kiosks to various convenience store backends. The engineer will be responsible for integrating hardware and software with customer environments, payment systems, point-of-sale solutions, and enterprise apps to ensure a seamless checkout experience. This is a multi-layered role requiring the engineering of APIs, app services, embedded systems, and networks to address integration gaps. Responsibilities include building critical software for kiosk and customer system communication, and incorporating new payment terminals and peripherals. The company maintains a flat, high-impact engineering culture where all engineers hold the title of Member of Technical Staff. The role requires commuting to Woodridge, IL twice a week and occasional in-person customer meetings.

Requirements

5+ years relevant coding experience
B.S. or higher in Computer Science (or equivalent work experience)
Excellent knowledge of one or more of these languages: Python, C++, TypeScript
Comfortable learning new languages, libraries, and frameworks when the solution calls for it.
Experience building production-ready code thatâ€™s used regularly by lots of people.

Nice To Haves

Experience building software from firmware up to the application layer, especially for a public facing device
Solid, working experience building software that closely interacts with hardware (payment systems, point of sales, fuel controllers are a plus)
Strong proficiency with Python, C, and C++
Experience meeting with and demoing new features for customers.

Responsibilities

Engineering Robust Integrations: Building and maintaining integrations between Mashgin's checkout kiosks and customer payment, point-of-sale, and enterprise systems to enable reliable, scalable deployments.
Connecting Hardware & Software: Developing software that bridges embedded devices, payment terminals, peripherals, backend services, and customer APIs into a seamless end-to-end experience.
Solving Complex Customer Challenges: Working directly with internal teams and enterprise customers to understand integration requirements, troubleshoot production issues, and deliver elegant technical solutions.
Building Integration Infrastructure: Designing and implementing reusable libraries, tooling, and services that accelerate future customer integrations while improving reliability and observability.
Debugging Across the Stack: Diagnosing and resolving issues spanning firmware, networking, operating systems, payment devices, cloud services, and distributed applications.
Prototyping & Shipping: Rapidly building, testing, and deploying integration solutions, bringing new payment devices, peripherals, and customer systems into production with speed and confidence.