Freelance software engineer · London, UK
Laurentiu Robert Niculescu
The developer and the sysadmin are the same person.
Hi, I'm Laurentiu. I build reliable web applications, secure Windows environments, and fix the technical problems that slow businesses down.
Most freelancers write the code and hand it over. I build the system and then run it, so nothing falls into the gap between the developer and whoever is supposed to look after the server.
A 14,000-line Windows security auditing tool in Python. A multi-tenant client platform in TypeScript that two companies run their week on, each with its own database. Two live web apps on Linux servers I provision and harden myself.
This is freelance work: self-employed, invoiced separately from anything else I do.
Available for new projects now. Fixed price, agreed timeline.
What I do
- Custom web applications that automate your workflow
- Client portals for scheduling, reporting and task management
- Windows security audits and hardening
- Linux server setup and maintenance
- Full-stack development with long-term support
- Fixed-price projects with clear delivery timelines
Why work with me
- You talk to me. Nothing is outsourced
- Security is part of the build, not a later add-on
- One person owns the development and the infrastructure
- Clear scope, fixed price, predictable delivery
- Systems built to last rather than to demo
Selected work
All projectsBespoke Client Management Platform
OngoingA multi-tenant portal that two client companies run their week on
- lines of TypeScript
- 15,000
- roles across two tiers
- 6
- database per tenant
- 1:1
- TypeScript
- Node.js
- Express
- React
- SQLite
- JWT
- +1
KitDesk
June 2025 - PresentEquipment booking and asset tracking, live on the web and on Google Play
- approved on Google Play
- Aug 2026
- build serves every customer
- 1
- scanner fallbacks
- 3
- React
- Vite
- Tailwind CSS
- Node.js
- Express
- MongoDB
- +3
MealMatch AI
January 2026 - PresentMeal planning on generative AI, to a real budget, in four languages
- plan, list and workout
- < 1 min
- languages
- 4
- budgets in real money
- £
- React
- Node.js
- Express
- MongoDB
- Anthropic Claude API
- Stripe
- +2
Writing
All postsIs an AI chatbot safe for my business?
The fears people raise about AI chatbots, which ones are real, which mostly aren't, and how I build one so the real ones can't do much damage.
Does my business need a penetration test?
Usually not first. What a pen test actually is, when a contract or your own web app genuinely needs one, and what my read-only audit does instead.
Can I build my business app with AI?
Yes, a working demo, often in an afternoon. What the AI builders' own documentation says stays your job, and where a paid build still earns its fee.
What I work with
- Languages
- TypeScript, Python, JavaScript, SQL, Bash
- Web
- React, Node.js, Express, Astro, Tailwind CSS, Vite
- Infrastructure
- Linux (AlmaLinux, Debian), nginx, WireGuard, pm2, VPS provisioning
- Security
- Host hardening, Lynis, fail2ban, UFW, SPF/DKIM/DMARC, vulnerability assessment
Start a project
That's with me.
I read these myself and reply within a working day, usually sooner. If it's urgent, ring 07853 610930.
