Your HRIS does 80% of what you need. The other 20% — the workflow that’s specific to how your company handles PTO approvals, the onboarding checklist that doesn’t fit any template, the manager dashboard your team has been asking for — sits on a wishlist that never gets funded.
That used to be a resource problem. Building custom HR tools meant hiring developers, engaging a consulting firm, or convincing IT to prioritize your project over twelve others. The cost was real, the timeline was long, and for most mid-sized companies, it just wasn’t worth it.
AI-assisted coding — what many are now calling “vibe coding” — is changing that math.
What Is Vibe Coding, and Why Should HR Care?
The term was coined in February 2025 by AI researcher Andrej Karpathy, who described a new way of building software: instead of writing code line by line, you describe what you want in plain language and let an AI model generate the code for you. Tools like Cursor, Replit, and GitHub Copilot have made this increasingly accessible to non-developers.
The impact has been fast. By early 2025, Y Combinator reported that a quarter of startups in its Winter cohort had codebases that were 95% AI-generated. McKinsey’s 2025 developer productivity research found that AI-augmented developers deliver 20–45% more output per sprint. And the AI coding tool market has exploded, with most professional-tier tools running between $20–$40 per user per month — a fraction of what a single developer hour costs.
For HR, the implication is significant: the gap between “what your HRIS can do” and “what your team actually needs” just got a lot cheaper to close.
The Real Problem with Off-the-Shelf HR Software
Off-the-shelf HR platforms are built for the median company. They’re designed to work for everyone, which means they’re optimized for no one in particular.
Most HR software runs $4–$30 per employee per month for standard SaaS tiers. Enterprise platforms like Workday or ADP Workforce Now run higher, with implementation fees often adding 10–20% on top. For that price, you get a solid core — payroll processing, benefits enrollment, basic reporting — but customization has always been the expensive part.
Want to add a custom approval workflow? That’s a professional services engagement. Need to integrate your HRIS with a homegrown scheduling tool? That’s a developer project. Want to build a lightweight internal app that automates a repetitive HR task? Historically, that meant engaging a software firm at $100–$200 per hour (North American rates), with a project that might cost $50,000–$150,000 before it was done — if it ever got done.
That’s not a technology problem. That’s an economics problem. And AI coding is solving it.
How AI Coding Lowers the Bar
Here’s what’s changed: an experienced HR professional who understands what they need — even without deep technical skills — can now describe a tool in plain English and have a working prototype in hours, not months. What would have taken a team of developers weeks can now take a single person with the right AI tools a few days.
AI coding tools deliver an average return of $3.70 for every dollar invested, with productivity improvements of 20–45% on development time. For smaller or targeted projects — the kind of improvements most HR teams actually need — those numbers hold up especially well. You’re not building a new HRIS from scratch. You’re adding a smarter onboarding tracker, a custom reporting dashboard, or a workflow automation that your existing platform can’t provide.
This is where the economics flip. A custom internal HR tool that once required a $75,000 consulting engagement can now be scoped, built, and deployed for a fraction of that cost — especially when you have someone who understands the HR domain deeply and knows how to direct AI tools effectively.
What Kinds of HR Improvements Are Now Realistic?
AI-assisted development is particularly well-suited for targeted, high-value additions to your existing HR tech stack. A few examples that are now within reach for most companies:
Custom Applications. Every HRIS leader has tasks that their current tools cant support. AI coding allows them to build them cheaper instead of paying for another vendor or to have a consultant come in and build something that you cant support or maintain on your own.
Workflow automation. Approval chains, onboarding checklists, compliance sign-offs — many of these can be turned into lightweight apps that connect your existing tools and eliminate the manual back-and-forth.
Employee self-service tools. Custom portals where employees can access information specific to your policies and your benefits setup, rather than generic FAQ pages buried in your HRIS.
Internal HR chatbots. A simple AI assistant that answers routine employee questions — about PTO balances, holiday schedules, benefit details — without routing everything through the HR inbox.
Integration bridges. Connectors between systems that don’t natively talk to each other, like pulling data from your ATS into your HRIS or syncing your payroll platform with a third-party analytics tool.
None of these are exotic. They’re the things HR teams have wanted for years but couldn’t justify the cost to build.
The Catch — and Why It Still Requires Human Judgment
It would be misleading to suggest that vibe coding is magic. It isn’t.
AI-generated code can have real problems: logic errors, security vulnerabilities, and maintenance challenges that aren’t obvious until something breaks in production. A 2025 analysis by CodeRabbit found that AI co-authored code showed significantly elevated rates of misconfiguration and security vulnerabilities compared to traditionally-written code. Experienced developers who have worked with AI tools describe the dynamic well: “AI tools are copilots, not autopilots. They can help fly the plane, but a human pilot must chart the course.”
For HR specifically, the stakes are higher than they might be for a general business app. You’re dealing with sensitive employee data, compliance requirements (GDPR, CCPA, state-specific labor laws), and workflows where errors have real consequences — for the company and for the people in it.
This is exactly why the promise of vibe coding in HR isn’t “anyone can build anything now.” The promise is that skilled, domain-aware practitioners can now build faster and at lower cost — when there’s proper oversight, architectural thinking, and someone who understands both the technology and the HR context directing the work.
Where Koluit Comes In
At Koluit, we use AI-assisted development to build custom HR applications and tools for growing companies — at a cost that doesn’t require an enterprise IT budget.
The difference between a vibe coding experiment and a production-ready HR tool is the layer of human judgment in between. We know HR. We understand the compliance considerations, the data sensitivity requirements, the way HR workflows actually work in practice. And we use AI coding tools to build faster, smarter, and more affordably than traditional development shops — passing those savings directly to our clients.
Think of it this way: AI coding has lowered the cost of production. Koluit provides the expertise to make sure what gets built is actually right for your team, your systems, and your people.
If your HRIS is leaving gaps that you’ve never been able to afford to close, it might be time to look at what’s now possible. [Internal link opportunity: link to Koluit services page or contact page]
The tools have changed. The economics have changed. The only thing that shouldn’t change is having someone who knows what they’re doing guide the build — that’s what we’re here for.
Koluit builds custom AI-powered HR apps and tools for growing companies at a fraction of traditional consulting costs. We’re a boutique firm, which means you get real attention — not a ticket number. Learn more at koluit.com.