I turn your idea into
a product you're proud to ship.
Lenka Kadlec · Senior Full-Stack Tech Lead · Ex-Microsoft
Full-stack development from architecture to deployment — one person, no coordination overhead.
Process
How I work with clients
Idea Vetting
Before writing a line of code, I assess whether your idea is viable, what the market looks like, and what the MVP actually needs to be. You'll know if it's worth building — and what to build first.
Technical Roadmap
Architecture decisions, tech stack, timeline, cost estimate, risk areas — delivered as a written document. You can take it anywhere. Most clients stay.
Implementation
4-week packages with clear deliverables and checkpoints. Both sides reassess and recommit at the end of each package. No open-ended retainers, no runaway scope.
Services
What I can build for you
I work across the full stack and take projects from idea to production. Here's where I add the most value.
Next.js / React Applications
Fast, accessible, production-ready web apps with App Router, RSC, and Tailwind. React and Next.js are my primary stack — but I deliver in whatever fits your project.
Full-Stack SaaS Development
End-to-end SaaS products: auth, multi-tenancy, billing, RBAC, and real-time features.
Admin Dashboards & Internal Tools
Custom dashboards, data tables, reporting tools, and internal platforms built for teams that need more than off-the-shelf.
API Design & Backend
Robust REST and GraphQL APIs backed by Node.js, Prisma, PostgreSQL — and .NET when the stack calls for it.
AI Integrations & RAG
Practical AI features using OpenAI and Anthropic — chat, retrieval-augmented generation, and natural language in-app actions.
AI Automation
Workflow automation with AI — document processing, intelligent routing, agentic pipelines that replace manual steps.
Security Hardening
Rate limiting, input validation, audit logging, and OWASP best practices baked in.
Performance Optimisation
Core Web Vitals, database query tuning, caching strategies, and bundle analysis.
Projects
Selected work
Selected work — personal projects and professional highlights.
Multi-tenant project management platform with real-time collaboration, role-based access control, and subscription billing. Includes an AI assistant that triggers real in-app actions by voice — create projects, assign tasks, and query status through natural language. Built as a full production SaaS from the ground up.
Microsoft Teams
Messaging features · Millions of users
Shipped production features for Microsoft Teams messaging used by millions of users worldwide. Led cross-team frontend delivery as primary engineer — coordinating rollout across multiple partner teams, working directly with PMs and principal engineers on scope, sequencing, and risk.
Community-driven recipe platform with AI-generated meal plan population — users describe their preferences and an AI assistant fills their weekly plan. Built with Redis caching, Cloudflare edge delivery, S3 image storage, and a PWA shell for mobile. Full auth, rate limiting, and E2E test coverage.
Contact
Let's work together
I'm open to new projects, collaborations, and conversations. If you have something you'd like to build, reach out and let's see if we're a good fit.