Mission-critical software,
built end to end.
Demos are easy now. The hard part is building a product that survives real-world data chaos, handles edge-case failures without breaking, and secures your sensitive data while scaling under pressure. That's the part I do.
FAVORED BY FOUNDERS & LEADERS
Strategy & Validation
Is this worth building?
I test the risky assumptions first, before the budget disappears into building the wrong thing.
Rapid prototyping
A prototype you can click on in days. The fastest way to find out if the idea holds up.
Product Engineering
Web apps & SaaS
The full application, front to back, built to carry a growing business for years.
Product design
Interfaces that make complex software feel obvious.
Applied AI
AI in the product
AI goes into the features where it saves your users time, and stays out of everything else.
Agents & automation
Agents and automated workflows dependable enough to run parts of your business without supervision.
Data & Decisions
Pipelines & dashboards
Dashboards with the handful of numbers you need when deciding what to build next.
Data infrastructure
Backends that stay fast even when the data gets heavy.
TRUSTED BY GLOBAL ENTERPRISES & PRODUCT-LED TEAMS
Who's behind this?
CodeFavorite is run by me, Nikola Vejin, a Software & Product Engineer. These days getting something onto a screen is easy. What I care about is the hard part below the surface: software that keeps working when the data gets messy, users don't behave the way anyone expected, and the system is under real pressure.
AI has made writing the code faster, but it hasn't changed the thinking. Understand the problem, figure out what's worth building, and cut through the complexity. Get that wrong and no amount of clean code will save the product.
I've been doing this for over twenty years now. I've built products for global enterprises like Kaman Corporation, public figures like Ronda Rousey, and product-led teams like AnchorFree (Hotspot Shield) and Twingate.
CodeFavorite is a one-person business. Most of the time, it's just me. Every so often, I'll bring in someone I trust for a specific part, but you're working with me directly the whole way through.
If you're interested in working together, drop me a message.
Selected work
Here are some of the projects I've worked on over the years.
How I work
One person building the whole product with no layers in between.
A direct line to me
There's no project manager passing notes along. The person you email is the person building your product.
Strategy before code
It starts with the problem you're solving. Figuring out what's worth building is where most of the value is.
Holds up in the real world
Messy data, edge cases, users doing the unexpected. I engineer for all of it up front.
Something working in weeks
Within a few weeks you'll be clicking through a working version. If it's headed the wrong way, that's the cheapest moment to find out.
AI in the process and the product
I work with AI every day, so I know what it's actually good at. In your product, it goes where it makes things better for the people using it.
You always know where things stand
I keep meetings few and send short written updates with working software to click on. You see the progress rather than take my word for it.
Honest about trade-offs
If I think something's a waste of your money, I'll tell you, even when I'd earn more by just building it.
Built to last
Everything is yours from day one: the code, the accounts, the infrastructure. Your own team can pick it up later and keep going without me.
Luke M. Vaillancourt
Amy Abo
Start a project
Tell me what you're building. I'll tell you what I think.
I take on projects I believe in, and I build them to hold up for the long run.
If you're building something that has to work, I'd love to hear about it.
Tell me what you're building and where you're stuck. A few lines is plenty.
I come back with my take and any questions, and we see if it's a fit, no pressure either way.
I lay out how I'd approach it, what to build first, and what it costs.
FAQ
CodeFavorite is Nikola Vejin's one-person studio for mission-critical software. Shipping since 2004.
FAVORED BY FOUNDERS & LEADERS