Udemy Instructor
75,000+ students, 1,100+ reviews across 5 courses. Flagship: Automation Testing Masterclass, covering Java, Selenium, Cucumber, JUnit, Docker and GitLab CI.
View courses ↗Software Engineer · Founder of Bitheap · AI Builder
Hi, I'm Laurentiu Raducu
I'm a full-stack developer with 12+ years across software development, security and QA automation. I am shipping awesome products from Zürich, Switzerland.
- 12+years
- 100k+students
- 4books
- 15+articles
- ∞projects shipped
Scroll to explore · or jump into the world
About
I'm a software engineer and the founder of Bitheap, based in Zürich, Switzerland. I grew up in Romania, studied at SNSPA in Bucharest, and started out as a technical writer at a company building software for financial institutions. Since then I've worked across software development, security and QA automation for some of the world's largest financial institutions, and today I spend most of my energy building and shipping AI products.
I describe myself as a tech polymath: I move fluidly between languages, frameworks and disciplines, with a genuine appetite for learning whatever a problem needs. Lately that has meant systematic trading research, options analytics and LLM-assisted workflows, which is what my open-source GPT Trading Agent and GreekFlow projects are about.
Alongside building, I teach and write. My courses have helped over 100k students on Udemy and Pluralsight, I publish on Medium and YouTube, and I've written four books. Away from the keyboard: running, chess and the outdoors.
- 📍 Zürich, Switzerland
- 🚀 Founder of Bitheap since 2022
- 🤖 AI builder & product engineer
- 📈 Systematic trading & options analytics
- 🎓 100k+ students taught
- ♟️ Running, chess & the outdoors
Experience
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2022 - Present
Founder
Bitheap · Zürich
Tech consulting, AI products and developer education. Home of HeadSnap, AIvestor, QuantiQ, Dave and Select.Supply.
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Oct 2021 - Present
Software Developer Engineer in Test
iptiQ (Swiss Re) · Zürich
Swiss Re's insurtech arm. Engineering and test automation for digital insurance platforms.
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Feb 2020 - Oct 2021
Automation QA Engineer
UBS AG · Zürich
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Nov 2018 - Feb 2020
Automation QA Engineer
London Stock Exchange Group · Bucharest
UnaVista; MiFIR / EMIR / G20 reporting. Java, Selenium, Jenkins.
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Jun 2017 - Nov 2018
Automation QA Engineer
Luxoft · Bucharest
UBS IB; Fenergo ALM / KYC.
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Mar 2014 - Jun 2017
QA Engineer & Technical Writer
Misys (now Finastra) · Bucharest
Where it started. Joined as a technical writer, moved into QA, promoted and awarded across several roles.
Projects
A selection of products and open-source work. The same projects appear as monuments inside the 3D world, so explore to find them.
Mini projects
Small interactive one-pagers I build to understand something properly. Each one is a single static page, no backend, no build step, running entirely in your browser.
Live dashboard
Is the AI hype cooling down?
A composite 0 to 100 index that answers whether AI infrastructure buildout is still accelerating, scored from five weighted signals: hyperscaler capex, neocloud spend, queued data-center power, new power capacity and regional load. Toggle between snapshot and trend views, then drill into the supply-chain bottlenecks running through 2030.
Open the dashboard ↗ Interactive explainerChipTycoon
How a computer chip is made, told as a theme park ride. A cart carries one silicon wafer through 20 stops, from crystal growth and photolithography to etching, ion implantation and packaging, and the wafer visibly changes at every stage. Ride the full loop in about eight minutes, or click any stop to jump straight to it.
Take the ride ↗ Interactive explainerTokenTown
A transformer rendered as an isometric city. Type a prompt and follow the convoy, the hidden state, as it moves district by district through tokenization, embeddings, positional encoding, multi-head attention, the feed-forward block and sampling. The maths is real and runs live in the browser on a small model, with temperature and top-p on sliders.
Visit the city ↗ Interactive manualEUV Lithography
An EUV scanner explained as an old-fashioned production and operation manual, with two trainers built into it. In the factory trainer you lay conveyor belts and place the coater, optics bay and stage shop, then run the line until a complete machine ships. In the light path trainer you steer 13.5 nm light off mirrors, from the tin plasma source through the reticle to the wafer, losing intensity at every bounce.
Read the manual ↗ Interactive explainerEngineWorks
How a Formula 1 power unit is built, watched as a factory line. A carrier moves through 15 stations, from raw stock and casting to heat treatment, machining, coating, turbo and hybrid assembly, clean room build, dyno testing and delivery. Swept volume, combustion events, thermal efficiency and combined power with the 350 kW MGU-K are computed live from the 2026 regulations, and the V6 fires in order at about a five-hundredth of real speed.
Start the line ↗ Interactive explainerRocket Engine Works
A methalox staged-combustion engine built across 14 stations, from raw stock and machining to assembly, hot fire and launch. Type a serial number for a unique build. The numbers are solved live rather than looked up: exit Mach from the area ratio, then exhaust velocity, characteristic velocity, thrust and specific impulse, with the ascent integrated from thrust, propellant burn-off and gravity falling away with altitude.
Build the engine ↗Writing
I write about AI, systematic trading, security and the reality of shipping small products. Some of it lands on other people's platforms, most of it on Medium.
Featured · alpaca.markets · Jul 2026From Quant Workflows to LLM-Assisted Trading with Alpaca
A guest piece for Alpaca on moving from rule-based strategies to LLM-assisted trading: using models for hypothesis generation while keeping deterministic risk controls and execution guardrails. Walks through two open-source projects, GPT Trading Agent and GreekFlow.
Read on Alpaca ↗On Medium
- Jul 2026 The Top AI Bottlenecks Explained: An Investor's Guide ↗
- Jul 2026 How I built a portfolio risk dashboard for my Alpaca account ↗
- Jan 2026 I tried 5 different styles for my SaaS's landing page, here's what worked best ↗
- Aug 2025 I created an AI trading agent and monitored performance for 3 months ↗
- Jun 2025 The best AI headshot generator, an honest review ↗
On the Pluralsight blog
- Dec 2025How to build a strong security culture in the workplace
- Nov 2025Top open-source cybersecurity tools for your business
- Oct 202512 top cybersecurity challenges for organizations
- Sep 2025Maximizing your cybersecurity budget: A practical guide
- May 2024How to automate your cybersecurity defenses with generative AI
- Apr 2024API security best practice for devs: How to secure your APIs
- Apr 2024Top 3 tools to safeguard app dependencies against vulnerabilities
Skills
Languages
PythonJavaScriptTypeScriptJavaKotlinC++C#RustGoSQLVB.NET
Frameworks & ML
ReactVueSvelteAngularSpringDjangoTensorFlowKerasNodeReact NativeViteTailwindThree.js
AI & Quant
LLM agentsOpenAI APIPerplexity APIRAGAlpaca APIBlack-ScholesOption GreeksBacktesting
DevOps & Cloud
DockerKubernetesTerraformAnsibleVaultAzureJenkinsGitLab CILinux
QA & Testing
SeleniumCucumberJUnitTestNGRestAssuredApache POITricentis ToscaISTQB
Teaching & Content
Pluralsight Author
Course author and blog contributor. Seven published pieces on cybersecurity strategy, API security and generative-AI defence.
Author page ↗Guest Author at Alpaca
Invited to write for Alpaca's Learn hub on quant workflows and LLM-assisted trading systems.
Read the article ↗Medium Writer
260+ followers. Essays on software engineering, AI agents, trading systems, SaaS and indie building.
Read on Medium ↗YouTube · @bitheap-tech
Videos on building software and AI products, plus walkthroughs of the tools I ship.
Watch ↗4 Books on Amazon
Published author across software and testing topics, including Introduction to Python Programming (2023).
Author page ↗Certifications
ISTQB Foundation · Tricentis Tosca L1 · Azure AZ-900 · MiFIR & EMIR Reporting.
Education
MSc, Project Management
SNSPA Bucharest
BSc, European Administration
SNSPA Bucharest
Contact
Let's build something. Reach out or follow along.