~/bog1200 (main) $ whoami

Bogdan-Laurentiu Stefanescu

Software engineer · MSc Distributed Systems student and Teaching Assistant at KTH

Stockholm, Sweden

github
github.com/bog1200
linkedin
linkedin.com/in/sbogdan701
contact
send a message ↓
  • EDU/education
  • EXP/experience
  • PRJ/projects
  • CERT/certifications
  • EVT/competitions & volunteering
scroll to read the log

History

$ git log --graph --all

  1. HEAD → main· · you are here· 5 open branches· 1 open branch· 2 open branches· 1 open branch· 1 open branch
  2. 96e9151EXP/KTH-TAopen – Present

    Teaching Assistant

    KTH Royal Institute of Technology · Stockholm, Sweden

    • DM1595 Program Development for Interactive Media
    • DH2642 Interaction Programming and the Dynamic Web
    • ID2216 Developing Mobile Applications
    TeachingInteraction programmingWeb developmentMobile development
  3. 6f6b90bEVT/TREASURERopen – Present

    Treasurer

    Stockholm, Sweden

    • Elected treasurer of a local residents' association for the April 2026 – April 2027 term, responsible for the association's finances (annual budget of about 15,000 SEK).
    FinanceBudgetingBoard role
  4. 3a57163EDU/KTH-MSCopen – Present

    MSc, Engineering of Distributed Systems

    KTH Royal Institute of Technology · Stockholm, Sweden

    Distributed systems
  5. f3236beEXP/RNopen – Present

    Event Technician

    RN Eventteknik · Stockholm, Sweden

    • Member of a specialised team responsible for end-to-end technical execution of live events, operating professional audio, lighting and stage infrastructure.
    • Configure and deploy networked AV systems, ensuring stable signal routing and hardware synchronisation for high-attendance productions.
    • Lead real-time troubleshooting of technical failures in high-pressure environments, maintaining system uptime and production quality.
    • Maintainer of Backstage2, the organisation's internal booking and bookkeeping software (Next.js, TypeScript, Knex/Objection.js, PostgreSQL, Heroku): added KTH access card (NFC) login, restricted to trusted devices through Cloudflare mutual TLS (mTLS) client certificates.
    Live audioLightingNetworked AVNext.jsTypeScriptPostgreSQLCloudflare mTLSgithub.com/rneventteknik/backstage2 ↗
  6. d9752b3PRJ/PARK-TICKETSopen – Present

    Park Admission Ticketing System

    • Develop and maintain a production e-commerce platform selling admission tickets for Parc Dumbrava Minunata (WordPress, WooCommerce, PHP).
    • Built a custom checkout flow and ticket generator module in PHP, enabling on-site access control through offline ticket verification.
    • Integrated a bank payment gateway through its official WooCommerce plugin, including online payment confirmation and transaction validation logic.
    • Designed secure, tamper-resistant QR codes for ticket authentication and fraud prevention, optimised for low processing power.
    • Built a desktop ticket scanning application in Java (Swing GUI) for touchscreen devices, supporting external QR code scanners and Google Wallet integration.
    • Manage web hosting, DNS, domain configuration and deployment for secure, reliable operation.
    WordPressWooCommercePHPJava SwingPayment gatewayQR codesGoogle WalletDNSparcdumbravaminunata.ro ↗
  7. bdae0d0Became a maintainer of Backstage2 (KTH card login)
  8. git checkout -b EXP/KTH-TA
  9. c9ae1fePromoted: Aspirant Member → Full Member
  10. git checkout -b EVT/TREASURER
  11. git checkout -b EDU/KTH-MSC
  12. git checkout -b EXP/RN
  13. f08319ePRJ/EID↳ merged –

    Decentralized Identity Management (Thesis)

    • Designed and implemented a decentralised identity federation for cross-border login: users always authenticate at their home country's Identity Provider (IdP), and trust between countries is discovered at runtime instead of through static peering.
    • Built a Cross-Identity Gateway (Java 21, Spring Boot WebFlux) that resolves a user's Decentralized Identifier (DID) to their home Country Node.
    • Built Country Nodes in Spring Boot (Spring Security OAuth2 Authorization Server, JPA, PostgreSQL) acting as application registries and token issuers; cross-border logins are proxied to the user's home node, which returns scoped, OpenID Connect (OIDC) compliant identity tokens.
    • Built a blockchain-backed IdP (Next.js, Prisma, MongoDB, ethers.js): users sign in with an Ethereum wallet (did:ethr), and a keccak256 hash of their identity proof is anchored on Ethereum Sepolia through a Solidity smart contract, without storing personal data on-chain.
    • Built a legacy-style IdP (Node.js, Express, MariaDB) with OAuth2 Authorization Code + PKCE, OIDC discovery and JWKS, and passwordless passkey (WebAuthn) login, showing compatibility with existing providers.
    • Containerised all services with Docker Compose and deployed each country on its own virtual machine, provisioned with Multipass and cloud-init.
    JavaSpring BootNext.jsNode.jsSolidityEthereumOAuth2/OIDCDIDsPasskeysPostgreSQLMongoDBDockergithub.com/bog1200/eid ↗thesis (PDF) ↗
  14. 94d0b14EDU/UPB↳ merged –

    Engineer's Degree, Information Engineering (taught in English)

    National University of Science and Technology POLITEHNICA Bucharest · Bucharest, Romania

    • 240 ECTS. Thesis: Decentralized Identity Management for Web Applications Using Blockchain (thesis grade 9.70/10).
    240 ECTSTaught in EnglishThesis 9.70/10
  15. 592c95ePRJ/MOODLE-PP↳ merged –

    Moodle++ – LMS

    • Built a prototype of a Moodle-style learning management system (LMS) with Next.js, React and Tailwind CSS, with a MySQL database, Cloudflare R2 object storage for user files and authentication through external identity providers.
    Next.jsReactTypeScriptTailwind CSSPrismaMySQLAuth.jsOAuth2/OIDCCloudflare R2S3 APIVercelgithub.com/bog1200/Moodle_plus_plus ↗
  16. 09973c6CERT/UIPATH-BA

    UiPath Certified Professional Automation Business Analyst Associate

    UiPath

    UiPathRPA
  17. 5cd6513CERT/UIPATH-DEV

    UiPath Certified Professional Automation Developer Associate

    UiPath

    UiPathRPA
  18. git checkout -b PRJ/PARK-TICKETS
  19. git checkout -b PRJ/EID
  20. fc03225CERT/GITHUB

    GitHub Foundations

    GitHub

    GitGitHub
  21. git checkout -b PRJ/MOODLE-PP
  22. c4f256cEXP/EURONEWS↳ merged –

    Web Developer Intern

    Euronews Romania · Bucharest, Romania

    • Built web applications with Next.js (React) and Tailwind CSS, using Supabase databases and Vercel cloud deployments.
    Next.jsReactTailwind CSSSupabaseVercel
  23. git checkout -b EXP/EURONEWS
  24. eb14606EDU/UPM

    Exchange Course: Physical Computing on Open Hardware Platforms (ATHENS, UPM115)

    Universidad Politécnica de Madrid · Madrid, Spain

    • Final grade: 10/10. Embedded systems and physical computing: built Arduino-controlled electronic circuits and interactive interfaces with Processing; final project: Arduino alarm system with sensor integration.
    ArduinoProcessingEmbedded systems
  25. 3dca072EVT/FIICODE

    FIICode Capture the Flag (CTF) cybersecurity competition, sponsored by Bitdefender

    Participant

    CTFCybersecurity
  26. 599b45aEVT/CLOUDFLIGHT

    Cloudflight Coding Contest

    Volunteer

    Competitive programming
  27. aa61007EXP/AXSYS↳ merged –

    Junior PHP Developer Intern

    Axsys Romania · Bucharest, Romania

    • Developed backend features in PHP using object-oriented programming (OOP) and the Symfony framework.
    • Used Docker and Docker Compose for containerised development environments, and Git and GitHub for version control.
    PHPSymfonyOOPDockerDocker ComposeGit
  28. git checkout -b EXP/AXSYS
  29. 1fc8f5ePRJ/DB-AIRLINES↳ merged –

    DB Airlines

    • Designed a MySQL database schema and a RESTful Express.js API (documented with OpenAPI/Swagger UI) for flight booking, with a small Angular front end.
    AngularTypeScriptExpress.jsREST APIOpenAPISwagger UIMySQLgithub.com/bog1200/DB_Airline_Project ↗
  30. git checkout -b PRJ/DB-AIRLINES
  31. 7ebffb5EVT/BEST

    BEST Engineering Marathon, Accenture Challenge

    • Built PetHero, an app for finding missing pets.
    Hackathon
  32. c212b04CERT/THM-JRPT

    Jr Penetration Tester (ethical hacking, web application security)

    TryHackMe

    Ethical hackingWeb security
  33. git checkout -b EDU/UPB
  34. 20fd0e4Initial commit· Bucharest, Romania

Stack$ git config --list

stack.languages
PHPTypeScriptJavaScriptJavaC++PythonSQLSolidityHTML5CSS3
stack.frontend
AngularReactNext.jsTailwind CSSSPA
stack.backend
Node.jsExpress.jsKnexObjection.jsSpring BootSpring SecurityPHPSymfonyRESTful APIsOpenAPISwaggerOAuth2OpenID ConnectJWTPasskeys (WebAuthn)Authentication & identity management
stack.data-cloud
MySQLMariaDBPostgreSQLMongoDBPrismaSupabaseRelational database designVercelHerokuCloudflare R2Cloudflare mTLSWeb hostingDNSDeployment
stack.tools
GitGitHubDockerDocker ComposeMultipasscloud-initEthereum (ethers.js, Sepolia)WordPressWooCommerceUiPath (Studio, Robots, Orchestrator)ArduinoOpenGLJava Swing
stack.areas
Distributed systemsFull-stack web developmentSoftware engineeringObject-oriented programmingContainerisationE-commercePayment gateway integrationBlockchainDecentralised identity (DIDs)Robotic process automation (RPA)CybersecurityPenetration testingEmbedded systems & IoTNetworked AV & live event production

Languages

  • Romaniannative
  • EnglishC1
  • FrenchA2
  • SwedishA2

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