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Principal Software Engineer

Job in Danbury, Fairfield County, Connecticut, 06813, USA
Listing for: Smith Arnold Partners
Full Time position
Listed on 2026-02-16
Job specializations:
  • Engineering
    Software Engineer, Systems Engineer
Salary/Wage Range or Industry Benchmark: 170000 - 190000 USD Yearly USD 170000.00 190000.00 YEAR
Job Description & How to Apply Below

If you’re an experienced software engineer who wants to build things that actually move — fast, accurately, and at scale — this is a role worth considering.

This is a role for engineers who want to build the core — not just bolt things on.

If you want to own complex systems, influence product direction, and work in an environment where your expertise is valued and your career can thrive — let’s talk.

Apply now or message us directly for a confidential conversation.

We’re a well-established global tech organization that builds the software and systems behind some of the most advanced, high-speed electromechanical equipment in the industry. Our technology helps run the operations behind critical communications and logistics around the world.

Principle Principal Software Engineer

Location:
Norwalk, CT

Salary - $170.000 – $190,000 +Bonus

Right now, we’re looking for a Senior Principal Software Engineer to take a leading role in architecting and delivering the software that powers our next generation of machine control systems. This is a hands-on, senior-level position where you’ll have real ownership, technical influence, and direct impact on the business.

Why This Role Stands Out:

High Visibility:
You won’t be buried in code no one sees — this role is front and center across engineering, product, and executive teams.

Complex, Real-World Problems:
This isn’t app development. You’ll be building control software for high-speed, precision-driven systems that integrate mechanical, electrical, and software components.

Stability + Innovation:
Join a company that’s been around for decades — but continues to evolve. The tech is serious, the teams are strong, and the roadmaps are ambitious.

Long-Term Career Growth:
This isn’t a stepping-stone job. It’s a long-term opportunity to lead, grow, and shape the future of how our machines perform.

What You’ll Do:

  • Design and develop real-time control software in C++ for large-scale, high-performance electromechanical systems
  • Lead cross-functional efforts across software, hardware, systems, and manufacturing
  • Guide architecture and technical strategy for multiple products and platforms
  • Debug and optimize at the system level — from code to motion control to hardware integration
  • Play a key role in roadmap planning and technical decision-making

What You Bring:

  • 10+ years of experience in object-oriented software design and full-lifecycle development
  • Deep hands-on experience in C++ and real-time operating systems (such as RTX)
  • Strong background in mechatronics, machine control, or similar system-level environments
  • Ability to lead multidisciplinary teams and drive projects through ambiguity to delivery
  • Excellent communication skills — both with engineers and stakeholders
  • BS or MS in Computer Science or a related field

Bonus Points:

  • Experience with motion or servo motor control
  • Exposure to .NET, Java, or ASP.NET
  • Background in SQL Server, Oracle, or web-based service architecture
  • Knowledge of industrial automation or paper-handling/mailing systems
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