Trust the Experts in Custom Software Development
Embedded, real-time systems, web, cloud, and mobile applications
When the stakes are high, you need a software partner who understands your industry inside and out. PSI builds software that meets your exact needs—secure, compliant, and built to last. Our team is deeply experienced in full-stack software engineering and custom software development for mission-critical industries, leveraging over 40 years of expertise to help you deliver on time, on budget, and with unparalleled quality.
Whether you’re navigating regulatory challenges for medical device development, streamlining industrial operations, or advancing innovative technologies for government partners, our team works alongside you to create reliable, tailored solutions. From concept to completion, PSI’s collaborative approach ensures that your software achieves your goals and exceeds expectations.
Explore Our Services
Successfully engineered systems
Everything we develop is CUSTOM
Satisfied clients across specialized industries
Years in business and proudly woman-owned
Proprietary Quality Management System (QMS) with yearly audits
Years of combined software engineering experience across our team
Our Philosophy
PSI is deeply committed to designing and engineering your system, creating quality software that meets your requirements.
Strategic Balance of Quality, Cost, and Schedule
Our proven methodology ensures every custom software development project is completed efficiently without sacrificing value.
Your Vision, Our Mission
We treat your software project goals and challenges as if they were our own, creating extensible software designs that meet every requirement you set.
Excellence Without Compromise
Our team of 100% U.S.-based full-stack development software engineers considers the required regulatory requirements and industry standards for your product.
Building Partnerships That Last
Honesty, collaboration, and open communication are the hallmarks of how we work with our clients to achieve every custom software design or development goal.
Specialized for Highly Regulated Industries
With decades of experience, we understand the unique needs and process requirements of government, industrial, and healthcare sectors: SIL, FDA, Cybersecurity, MIL-SPEC, and more.
A Family Business Ethos
Our origins as a family-founded company shape our approach, emphasizing people-first values and doing things the right way.
Our Process
A proven, phased approach to delivering custom software that works.
The PSI development process is more than an optimized and repeatable workflow. It’s a proven phased approach that ensures your custom software meets the highest standards—on time, on budget, and built for long-term success. Every step is designed to ensure that your custom software meets the highest standards of quality, regulatory, security, and performance while aligning seamlessly with your goals.
From in-depth discovery in the project planning stage to precise implementation and long-term support, we approach every project with the same meticulous attention to detail. Whether starting from scratch or stepping in midstream, our flexible, phased methodology allows us to adapt to your unique challenges and deliver solutions that meet your needs.
Concept & Research
Collaborating with you to uncover comprehensive insights and define goals, our team goes deep to build the solid foundation for your project’s success.
- Business Case
- Proof of Concept (PoC) User Requirements
- PoC SW Requirements
- Feasibility
- Engineering PoC
- R&D Experimentation
- Wireframes
Milestones: Project Roadmap | Prototype Development Begins | Gap Assessment Start
Planning
Together, we’ll formulate a clear, actionable strategy to transform your vision into a detailed roadmap.
- User Requirements
- Budget & Schedule
- Test Plan
- Risk Plan
- Cybersecurity Plan
- Project Plan
- User Requirements
- SW Requirements
- Regulatory Plan
- UX/UI Design
- Formative Study
Milestones: Software Design Docs Produced | Risk Analysis Begins | Gap Assessment Complete
Development
This is where the engineering gets real. Our team brings your plan to life development guided by a solid, well-built software or system design.
- Test Protocols
- FMECA
- Risk Control
- Technical Reviews
- Architecture
- Detailed Design
- Development
- Unit Tests
Milestones: Beta | 1.0 Version Build | Software Test Plan(s) Delivered
Testing
We don’t just test—we prove your software does exactly what it should. Every requirement is checked, every system is verified, and every standard is met before going live.
- Test Protocol Execution
- Interoperability Testing
- System Tests
- OTS Testing
- Traceability
- Release Packaging
- Penetration Testing
- Clinical Trial
- Usability
Milestones: 1.0 Version Build Complete | Clinical Trial | Regulatory Approval Process Begins
Maintenance & Support
We provide ongoing care and expertise to keep your completed software secure, running smoothly, and evolving with your goals.
- Technical Support
- Feature Updates
- Cyber Surveillance
Milestones: Hand-Off of All Source Code | Documentation Complete
Our clients can feel confident that your software solution was designed with maintenance and scalability in mind. Manage it yourself or take advantage of PSI’s support services.
For the PSI Team, Cybersecurity is at the Core of Every Solution
We prioritize cybersecurity from the start, ensuring your custom software and data are protected at every stage of development. This begins with a thoughtful software design and architecture, building in security from the ground up. With a 100% US-based team and deep expertise in safeguarding embedded systems, web, cloud, and mobile applications, we build secure, reliable software that meets the cybersecurity standards your product or system requires. PSI has experience with cybersecurity standards presented in ISO 27001, IEC 62443, CMMC, and more. From initial concept to final delivery, our process ensures that security is a constant, minimizing risks and protecting your software every step of the way.
Certifications and expertise to meet industry-specific compliance requirements.
When it comes to mission-critical software, compliance isn’t optional—it’s essential. At PSI, we ensure every solution we deliver adheres to the necessary standards required by your industry. Our certifications and expertise guarantee confidence in every line of code, ensuring your software functions flawlessly and satisfies all regulatory demands. As our foundations of quality management and compliance, we are proud to uphold:
- ISO 9001:2015 – Quality management systems – Requirements
Your project benefits from a proven Quality Management System (QMS) that ensures consistent performance, efficiency, and adherence to regulatory requirements. - ISO 13485:2016 – Medical devices – Quality management systems – Requirements
for medical device software, we meet the expected requirements for the software development life cycle as it pertains to medical devices, the FDA, and MDR. - 21 CFR Part 820: FDA Software Requirements – Rely on PSI to deliver the necessary documentation that your Class I, II, or III medical device will need for your 510(k), De Novo, or PMA regulatory submission.
- SIL Compliance/IEC 61508 – Assurance of functional safety for industrial applications.
- MILTEC Standards – Expertise in delivering secure, dependable solutions for military and government needs.
Need Help with Additional Standards? Trust PSI.
Compliance is built into every line of code we write. Our expertise ensures your software meets every industry standard so you can move forward with confidence. In addition to fortifying every project with advanced cybersecurity measures in adherence to ISO 27001 standards that protect your intellectual property and ensure efficiency at every step, we provide:
- IEC 62304, IEC 14971, and IEC 60601 Compliance for Medical Devices
- Adherence to 21 CFR Part 820
- MIL-SPEC & MIL-STD
- IEC 12207 Compliance (Software Life Cycle)
- IEC 61508 Compliance (Functional Safety)
- Many More – Just Ask Our Team!
Get Custom Software That Works—Now and in the Future. Let's Build It Right, Together.
