Software engineering falls under the professional, scientific, and technical services industry in official government classifications, but in practice it spans nearly every sector of the economy. The federal classification system places custom software development under NAICS code 541511 (Custom Computer Programming Services), while software sold as a product falls under 511210 (Software Publishers). That said, fewer than half of all software engineers actually work at “tech companies.” The rest are spread across finance, healthcare, manufacturing, government, and dozens of other fields.
How the Government Classifies Software Engineering
The North American Industry Classification System (NAICS) is the standard framework used by federal agencies, tax authorities, and economic researchers to categorize businesses. Software engineering work falls into a few distinct codes depending on what the company actually does.
NAICS 541511, Custom Computer Programming Services, covers establishments that write, modify, test, and support software built for a particular customer. This includes custom application development, software analysis and design, and even custom web design. If a company builds bespoke software for clients, this is its official classification.
NAICS 511210, Software Publishers, covers companies that design, develop, and distribute software as their own product, think companies selling packaged or cloud-based applications to broad markets. And NAICS 541512, Computer Systems Design Services, covers firms that plan and build integrated systems combining hardware, software, and networking, even when custom code is part of the deliverable.
These codes matter if you’re starting a business, filing taxes, applying for government contracts, or researching market data. But they only describe the company’s primary activity. A software engineer working at a hospital or a bank won’t show up in any of these codes, because the employer is classified under healthcare or finance.
Where Software Engineers Actually Work
Bureau of Labor Statistics data from 2024 shows how software developer employment breaks down by industry. The numbers paint a picture of a profession that lives well beyond Silicon Valley:
- Computer systems design and related services: 30% of software developers
- Finance and insurance: 10%
- Software publishers: 9%
- Manufacturing: 8%
- Management of companies and enterprises: 5%
Only about 39% of software developers work in what most people would consider the “tech industry” (computer systems design plus software publishing combined). The remaining 61% are employed across finance, manufacturing, government, retail, healthcare, education, and other sectors. This is what makes software engineering unusual as a profession: the skills are universal, but the industry context varies enormously.
Software Engineering Inside Traditional Industries
Banks, hospitals, automakers, defense contractors, and even nonprofits all employ software engineers directly. These aren’t just IT support roles. Engineers at financial institutions build AI-powered products, fraud detection systems, and trading platforms. In manufacturing, they develop software for production equipment, lifecycle analysis tools, and supply chain systems. Defense and aerospace companies hire software engineers to build simulation environments, mission-critical systems, and integration platforms.
The day-to-day work in these roles often looks similar to what you’d find at a pure tech company: writing code, reviewing pull requests, deploying to cloud infrastructure, and collaborating with product managers. The difference is the domain knowledge. A software engineer at an insurance company needs to understand policy structures and regulatory requirements. One at a manufacturing firm needs to know how production lines operate. This domain expertise often becomes a career differentiator and can affect compensation, since regulated industries like finance and healthcare sometimes pay premiums for engineers who understand their specific compliance landscape.
Tech-Driven Verticals
A growing category blurs the line between “tech company” and traditional industry. These are businesses where software is the core product, but the value proposition is tied to a specific sector. FinTech companies build payment processing, lending, or investment platforms. HealthTech firms create electronic medical records, telemedicine tools, or diagnostic software. EdTech companies develop learning management systems and online course platforms.
If you work at one of these companies, you’re technically in the software industry by function, but in finance, healthcare, or education by market. Job boards and recruiters often categorize these roles differently depending on context, which can make job searches confusing. When you see a posting from a “non-tech company hiring software engineers,” it usually means a company whose primary business isn’t software but whose operations depend heavily on it.
Why the Industry Label Matters for Your Career
The industry you work in as a software engineer affects more than your job title. Compensation varies significantly by sector. Engineers at software publishers and financial services firms tend to earn more than those in education or government, though government roles often come with stronger benefits and retirement packages. Your industry also shapes your resume narrative: recruiters in healthcare tech want to see candidates who’ve worked with patient data, while those in e-commerce look for experience with high-traffic distributed systems.
If you’re choosing where to start or pivot your career, think about which industry’s problems interest you. The programming languages and frameworks matter less than you might expect, since most transfer across sectors. What doesn’t transfer as easily is the domain knowledge you build over years of working in a particular field. An engineer who spends five years building compliance software for banks has a very different career trajectory than one who spends that time building recommendation engines for a streaming service, even if both write Python every day.
For tax, licensing, or business registration purposes, the NAICS code you choose should reflect your company’s primary revenue activity. If you’re a freelance developer building custom applications for clients, 541511 is your code. If you’re building and selling your own software product, 511210 is the better fit. Getting this right matters for government surveys, loan applications, and certain tax filings.