What are the responsibilities and job description for the Principal Software Engineer position at Smith Arnold Partners?
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
Salary : $170,000 - $190,000