Building useful software, end to end

I turn complex ideas into clear, dependable products.

Full-stack software development across web products, business systems and data-heavy workflows — with equal attention to what users see and what keeps the system reliable underneath.

C# / .NET SQL Server Next.js / React Product engineering
nicolaemihalcea.dev Available
01 / BUILD

Software should feel simple because the hard thinking happened before it reached the user.

latest: "TinyRhythm",
type: "privacy-first PWA",
focus: "real-world usability",
status: shipping
PRODUCT ENGINEERING✦WEB APPLICATIONS✦DATABASE DESIGN✦DESKTOP SOFTWARE✦PRIVACY BY DESIGN✦ PRODUCT ENGINEERING✦WEB APPLICATIONS✦DATABASE DESIGN✦DESKTOP SOFTWARE✦PRIVACY BY DESIGN✦
Latest project

Built around a real problem, not a feature checklist.

TinyRhythm is a privacy-first baby tracker designed for speed, offline use and encrypted family sync. It is a good example of how I like to work: product thinking, interface design and implementation treated as one system.

01 Live project
TinyRhythm

Private baby tracking, without the data trade-off.

Fast day-to-day tracking for feeds, breastfeeding, pumping, nappies, sleep, growth and care. The app starts locally, works offline and can sync across caregiver devices while keeping care records encrypted before they reach the relay.

Next.jsPWAOffline-firstEncrypted syncResponsive UI
Explore TinyRhythm
◆ tinyrhythm.vercel.app
↗
TinyRhythm
● Synced
TodayFriday, 28 August
Feeds6540 ml
Nappies7today
Sleep9htotal
◒
Bottle feed120 ml · Formula
◇
NappyWet + dirty
☾
Sleep1h 46m
◆
Private by architectureCare data is encrypted before sync.
Expertise

Comfortable from the interface to the database.

I work best where product requirements, business rules and technical constraints meet — the places where clean implementation matters most.

01
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Web products

Responsive applications and websites with clear information architecture, polished interaction and maintainable front-end code.

Next.js · React · TypeScript · PWA
02
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Business software

Reliable desktop and server-side software for complex operational workflows, validation rules and data-heavy interfaces.

C# · .NET · WinForms · WPF
03
DB

Data & SQL

Schema design, stored procedures, reporting logic, upgrade safety and performance-minded data access for SQL Server systems.

SQL Server · T-SQL · Data design
04
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Product engineering

Taking an idea from rough requirement to something people can actually use, including architecture, UX decisions and delivery.

Architecture · UX · Delivery
How I work

Pragmatic engineering, with a strong bias for clarity.

Good software is not just code that works. It should make the next change easier, make the important state obvious and remove unnecessary effort from the person using it.

My work spans established business systems and new web products, so I care about both sides of delivery: preserving reliability where the rules are complex, and keeping the experience focused where users need speed and simplicity.

01Understand the real constraint before writing the solution.
02Prefer readable, maintainable code over clever code.
03Treat privacy, validation and edge cases as product features.
Get in touch

Have a product, system or difficult workflow that needs building?

Send a short note about what you are working on. The useful details are the problem, who it is for, and what “better” should look like.

Based in the UK Available for selected projects & conversations

No tracking pixels, mailing list or automated follow-up. Just your message.