Staff Software Engineer – Full Stack / Systems Architecture

Theron Partners Inc.
Sioux Falls, South Dakota, United StatesFull-timePosted Aug 26, 2026

About the role

Staff Software Engineer – Full Stack / Systems Architecture

Type: Full-Time | Direct Hire

Relocation Support: Available

About the Role

We are looking for a hands-on Staff Software Engineer to design and build customer-facing command-and-control software for mission-critical systems.

This is an opportunity for an engineer who thinks beyond individual features and enjoys solving complex system-level problems. You will work across the full stack—from frontend application architecture and data-driven single-page applications to backend services, APIs, and real-time operational data.

What You’ll Do

Architect and build complex, data-driven single-page applications.

Design scalable backend services, APIs, integrations, and data flows.

Lead technical design and make foundational architectural decisions.

Establish engineering patterns, coding standards, and maintainability practices.

Solve performance, reliability, and scalability challenges across the stack.

Conduct architectural and code reviews.

Mentor engineers and help raise the overall technical bar.

Work with real-time telemetry, operational workflows, and mission-critical systems.

What We’re Looking For

8+ years of software engineering experience.

Strong hands-on full-stack engineering background.

Experience with frontend architecture and backend services.

Strong system design and software architecture experience.

Proven experience delivering significant production software systems.

Ability to make and communicate complex technical tradeoffs.

Experience leading technical design and influencing engineering standards.

Strong independent problem-solving and engineering judgment.

Preferred Experience:

Python

TypeScript

Complex data visualization

Design systems

Real-time or telemetry-driven applications

Operational or decision-support software

Mission-critical or high-reliability software environments

Why This Role?

This is more than a typical development role. You’ll have the opportunity to influence how critical software systems are designed and built while remaining hands-on with engineering.

For the right person, the role can grow into broader technical leadership and architectural ownership.

Responsibilities

  • Architect and build complex, data-driven single-page applications.
  • Design scalable backend services, APIs, integrations, and data flows.
  • Lead technical design and make foundational architectural decisions.
  • Establish engineering patterns, coding standards, and maintainability practices.
  • Solve performance, reliability, and scalability challenges across the stack.
  • Conduct architectural and code reviews.
  • Mentor engineers and help raise the overall technical bar.
  • Work with real-time telemetry, operational workflows, and mission-critical systems.

Qualifications

  • 8+ years of software engineering experience.
  • Strong hands-on full-stack engineering background.
  • Experience with frontend architecture and backend services.
  • Strong system design and software architecture experience.
  • Proven experience delivering significant production software systems.
  • Ability to make and communicate complex technical tradeoffs.
  • Experience leading technical design and influencing engineering standards.
  • Strong independent problem-solving and engineering judgment.

Benefits

  • Relocation Support

Skills mentioned

System DesignFrontend DevelopmentBackend DevelopmentPythonTypeScriptREST APIsData VisualizationWebSocketsPerformance OptimizationDistributed Systems

About Theron Partners Inc.

Theron Partners Inc. is a founder-led, boutique staffing and technology services firm focused on delivering high-quality talent and tailored solutions to US enterprises. Built by industry professionals with deep experience in the US staffing and consulting landscape, we operate with a hands-on leadership approach—ensuring every engagement meets the highest standards of quality, responsiveness, and accountability. We specialize in technolgy staffing, professional services, consulting, and project delivery, providing access to a carefully curated network of proven tech professionals across critical and next-generation solutions. Our vendor-independent model allows us to remain fully objective, aligning technology and talent decisions strictly with our clients’ business goals. As a boutique firm, we value relationships over transactions, precision over volume, and long-term success over short-term wins. We partner closely with our clients as an extension of their teams—delivering dependable results, scalable solutions, and enduring value.

Staffing and Recruiting11-50 employeesWilmington, Delaware