David LeiteDesign Engineer
I design and build product experiences, prototypes and workflow systems for companies that want to ship faster. Hire me full-time — or bring me in to build a product for your team.
- 7+
- Products shipped
- 10x
- Faster iteration with AI
- 100%
- Solo-built end to end
About
I turn ideas into working products.
I'm a design engineer with a product mindset. My strength isn't that I know every technology upfront — it's that I learn new domains fast, prototype quickly, debug systematically, and turn rough ideas into products people can actually use.
Modern AI tools are a multiplier in my workflow. I still own the problem framing, the product decisions, the testing and the final call on what ships. That combination — fast learner, tool-fluent, product-minded — is how I deliver work that punches above the team size.
Selected work
Case studies — shipped, prototyped, in flight.
Each project covers the problem, what I built, my role, the workflow, the UX thinking and the outcome.
For companies & founders
What I can build for your team.
If you've seen something in my portfolio you'd like for your own product — that's exactly what I do. I work as an embedded builder, designer and AI-product partner for startups, scale-ups and internal teams.
MVP & prototype in days
From rough idea to a real, clickable product your team can test with users — typically in 1–2 weeks instead of months.
- Working web app
- Auth, database & basic admin
- Deployed and shareable
Product & UX design
Modern, accessible interfaces with a real design system. I cover flows, copy, components and the front-end build.
- UX flows & wireframes
- Design system in code
- Responsive front-end
Internal tools & workflow apps
Replace spreadsheets, shared inboxes and 3–4 disconnected tools with one focused internal app your team actually uses.
- CRUD + roles
- Custom workflows
- Integrations & exports
AI features inside your product
Voice agents, LLM copilots, summarisation, smart search — designed with the same product care as the rest of the UI.
- LLM / voice integration
- Prompt design & guardrails
- Cost-aware architecture
Landing pages that convert
Conversion-focused, brand-strong marketing sites for product launches, campaigns and D2C brands.
- Copy & structure
- Brand-aligned design
- Fast, SEO-ready build
AI-assisted dev capacity
Embed me as an extra builder for a sprint or a quarter. I move at the speed of a small team thanks to AI-native workflows.
- Async or in your stand-up
- Fixed-scope or retainer
- Code you own
How we can work together
Fixed-scope project
Defined deliverable, fixed price, clear timeline.
Sprint / pilot
1–3 weeks to validate an idea or ship an MVP.
Monthly retainer
Ongoing capacity for product, design and build.
Full-time hire
Open to permanent roles — remote, hybrid or on-site.
How I work with AI
AI is a multiplier. The product thinking is mine.
I treat AI like a fast, tireless collaborator — not an autopilot. It helps me move from idea to evidence quickly so I can spend my judgement where it matters: on the user, the experience and the final decision.
Frame the problem
I start with the user and the job-to-be-done — not the tool. AI helps me explore the domain quickly, but the framing stays mine.
Prototype to learn
I use AI-assisted coding to get to a working prototype in hours, not weeks. Real screens beat slide decks for finding the real questions.
Test, refine, decide
I pressure-test flows, copy and edge cases by hand. AI accelerates the work; the product decisions and trade-offs are mine to own.
Ship and iterate
Shipped products beat perfect plans. I release small, learn from use, and keep tightening the experience until it earns its place.
CV / Experience
The short version of my CV.
Built around shipped products, modern workflows and a strong UX instinct. Full CV available on request — and through the projects below.
Experience
2024 — Present
Design Engineer & Product Builder
Self-employed
Designing and shipping products end-to-end — from concept and UX to working web apps. Built 7+ products across fintech, e-learning, fitness, voice AI and internal workflow tools.
2023 — 2024
Product & UX experiments with modern tooling
Personal R&D
Deep dive into modern product building: voice agents, LLM workflows, prompt design and rapid prototyping with AI dev tools. Turned the workflow into a repeatable way of shipping products solo.
Before 2023
Earlier work — operations & customer-facing roles
Various
Hands-on roles that taught me how real users behave, how teams actually work, and why clear interfaces matter — the foundation behind the product thinking I bring today.
Learning
Self-directed in product, UX & AI building
Continuous learning through shipped projects, AI-pair programming and modern product practice.
Languages
- NorwegianNative
- PortugueseNative
- EnglishProfessional
- SpanishConversational
For employers
Open to full-time, contract or freelance work. International roles welcome.
Get in touchCapabilities
Tools and domains I work across.
What I'm looking for
Teams that build with AI — and care about craft.
I'm looking to join a team that takes AI seriously as a way of working, values product thinking and design quality, and gives me ownership over real problems. Remote, hybrid or on-site — open to international roles.
- UX Designer / Product Designer
- Design Engineer
- AI Product Builder
- Vibe Coding Developer
- Junior Developer with AI fluency
- IoT / Cloud entry-level roles
Contact
Hiring, collaborating, or just curious? Let's talk.
Recruiters, hiring managers and founders — send a short message and I'll reply with a CV, references and anything else you need.