AUSTIN STEINER
NYC Metropolitan Area
Summary
Experienced senior software engineer with a strong focus on web development and API-driven systems. Proven track record designing and implementing RESTful APIs, integrating complex databases and third-party services, and delivering end-to-end solutions that improve system interoperability and data integrity. Leads by example through mentorship and ownership, cultivating a collaborative, growth-oriented engineering culture.
Overview
5
5
years of professional experience
Work History
Senior Software Engineer
Simplist/Sonar
10.2023 - 10.2025
- Modernized and extended existing systems by integrating AI and large language models (LLMs) to improve automation, decision-making, and operational efficiency.
- Designed, built, and maintained scalable backend and frontend features using C# and ASP.NET Core , following agile development practices.
- Led API design and implementation across the full stack, including internal services and third-party integrations.
- Collaborated closely with product and cross-functional teams to define requirements, design solutions, and successfully ship new features.
- Managed multiple concurrent projects while consistently meeting deadlines and maintaining high engineering quality standards.
- Implemented unit testing and promoted best practices around code quality, reliability, and maintainability.
Senior Software Engineer
Simplist
02.2023 - 10.2025
- Implement new backend and front end features using C# and .NET Core.
- API design and implementation through the entire stack.
- Work with the product team to successfully design and ship new features.
- Maintain and track projects using Jira.
- Unit testing implementation.
- Work with third party vendors to design and implement APIs.
Back-end Software Engineer
Simplist
11.2021 - 02.2023
- Implement new backend features using C# and ASP.NET Core.
- API implementation.
- Complete front end work as needed (Angular).
- Maintain and track projects using Jira.
- Unit testing implementation.
Software Engineer
S-Cubed
08.2020 - 11.2021
- Contributed to full-stack development using the .NET Framework, delivering features that met product requirements and project deadlines.
- Designed, integrated, and tested software solutions, including logic supporting servo-driven robotic systems.
- Built internal scripts and tools to improve developer efficiency and streamline daily workflows.
- Maintained and extended existing systems by working with relational databases, legacy codebases, and user feedback.
Education
Experimental Psychology -
Kutztown University of Pennsylvania
Kutztown, PA01.2020
Liberal Science - undefined
Sussex County Community College
Newton, NJ01.2018
Skills
- C#
- ASPNET Core
- API Design & Development
- Asynchronous Programming
- Object-Oriented Programming (OOP)
- Microservices Architecture
- Relational Databases
- Web Application Development
- Full-Stack Development
- AI / LLM Integration
- LLM Tooling & Orchestration
Timeline
Senior Software Engineer
Simplist/Sonar
10.2023 - 10.2025
Senior Software Engineer
Simplist
02.2023 - 10.2025
Back-end Software Engineer
Simplist
11.2021 - 02.2023
Software Engineer
S-Cubed
08.2020 - 11.2021
Liberal Science - undefined
Sussex County Community College
Experimental Psychology -
Kutztown University of Pennsylvania