Sean Lawton Tandjaja

Full-Stack Developer & Freelance Visual Creator
📞 081330330450 ✉️ Sean.tandjaja2005@gmail.com 🌐 Web Portfolio 💼 LinkedIn 🐙 GitHub 📍 Surabaya, Indonesia

Objective

Full-Stack Developer and Freelance Visual Creator. Offering strong technical proficiency in SwiftUI, Python, Kotlin, and web development to build robust software systems, coupled with a professional background in photography, videography, and content editing. A lifelong learner dedicated to continuous technical and creative growth.

Education

Universitas Ciputra Surabaya
2024 — 2028
Informatics — Full Stack Development
  • GPA: 3.41 / 4.00
  • Coursework: Mobile Application Development With Swift, Visual Programming, Web Development

Work Experience

Bitech Vision
Surabaya, Indonesia | Aug 2026 — Sep 2026
Artificial Intelligence Engineer
  • Developed backend services for an AI-enhanced Enterprise Resource Planning (ERP) system using Python and Flask to optimize internal business operations.
  • Engineered a mobile-responsive web application utilizing Optical Character Recognition (OCR) for automated receipt scanning, extracting data to seamlessly track user income and expenses.
Genesys Integrated Indonesia
Surabaya, Indonesia | Aug 2026 — Sep 2026
Artificial Intelligence Engineer
  • Engineered a full-stack conversational AI application using a Next.js frontend and a Python backend to securely process Large Language Model (LLM) logic.
  • Implemented a Retrieval-Augmented Generation (RAG) pipeline, enabling the AI to accurately parse and query proprietary company guidelines without hallucinating.
  • Integrated LLM function calling to interact with external REST APIs, allowing the chatbot to securely fetch real-time data and live status updates for end-users.
  • Developed a dynamic human-in-the-loop (HITL) learning mechanism that captures administrator feedback to continuously refine the bot’s domain knowledge and accuracy.
Henry Archive Division
Surabaya, Indonesia | 2025 — Present
Editor, Videographer, Photographer
  • Document live performance events for DJ Henry, ensuring comprehensive, high-quality visual coverage of each set and venue.
  • Conceptualize, shoot, and produce engaging promotional materials to build and maintain the artist's digital brand presence.
  • Collaborated closely with the artist to translate their ideas into engaging digital content that elevated their brand.
Hoptons Visual
Surabaya, Indonesia | 2025 — Present
Videographer, Photographer
  • Collaborate on-set to shoot high-quality corporate deliverables, including comprehensive company profiles and targeted advertisement campaigns for diverse business clients.
  • Collaborated with a multidisciplinary crew to conceptualize and shoot high-quality corporate campaigns, rapidly adapting to new cinematography techniques learned from team members.

Project Experience

Leap Plan
Universitas Ciputra Surabaya | May 2025 — June 2025
Full-Stack App Developer (iOS & watchOS)
  • Engineered an automated multi-day itinerary generation engine by resolving complex city-to-API mapping challenges, utilizing custom filtering algorithms and the Foursquare Places API to instantly translate user city inputs into highly accurate, personalized travel plans.
  • Enhanced user navigation and travel logistics by integrating dynamic MapKit rendering and MKDirections, calculating precise transit times and drawing interactive polyline routes between generated destinations.
  • Developed a highly scalable iOS and watchOS ecosystem applying Clean Architecture (MVVM) and Modern Swift Concurrency (async/await), ensuring fluid real-time data synchronization and secure user authentication backed by Cloud Firestore.
Recipe Vault
Universitas Ciputra Surabaya | May 2025 — June 2025
Full-Stack App Developer (iOS)
  • Integrated external APIs (TheMealDB) with user-generated NoSQL data, utilizing Combine and Swift Concurrency to sync states in real-time.
  • Engineered a comprehensive iOS recipe management application using Swift and MVVM architecture, integrating Firebase Auth and Cloud Firestore to support custom recipe creation, image encoding, and a relational public/private collection system.
Sum-O
Universitas Ciputra Surabaya | May 2025 — June 2025
Full-Stack Developer (Android & Backend)
  • Engineered a Point of Sale (POS) and inventory management application specifically created to streamline operations for local small businesses (UMKM).
  • Designed and implemented logistics tracking and item store management features to optimize stock control and operational efficiency.
  • Bridged product conception with technical execution, working alongside full-stack developers to deliver a cohesive and practical business solution using Kotlin, Node.js, and PostgreSQL/Prisma.
Festivo
Universitas Ciputra Surabaya | May 2025 — June 2025
Full-Stack Web Developer
  • Built a comprehensive event management and ticketing website, empowering event organizers to seamlessly post events, manage details, and set dynamic pricing.
  • Developed user-friendly workflows for customers to browse upcoming events and securely purchase tickets.
  • Participated in full-cycle web development, successfully translating UI/UX design concepts into robust back-end functional requirements.

Leadership Experience

Universitas Ciputra Fair 2026
Universitas Ciputra Surabaya | August 2025 — May 2026
Coordinator of Publication and Documentation Department
  • Mentored and co-directed a 17-member creative team, providing strategic guidance and creative direction for the end-to-end production of promotional trailers, teasers, and social media carousels.
  • Supervised on-site documentation and post-production workflows for major university events (Flare 2.0, Ciputra Run, UC Fair 2026), assisting team members on best practices for capturing and editing video recaps.
  • Guided storyline conceptualization and managed task delegation, empowering the team to independently deliver high-quality media assets while maintaining a cohesive brand identity.
  • Navigated complex team dynamics by making critical, results-driven decisions, successfully balancing project constraints with the delivery of high-quality creative outcomes.
Universitas Ciputra Debate Competition
Universitas Ciputra Surabaya | August 2025 — May 2026
Coordinator of Publication and Documentation Department
  • Co-led and mentored a 6-member media team, guiding the development and execution of digital content strategies, including narrative-driven Instagram carousels and storylines.
  • Directed comprehensive on-site event documentation and oversaw the team's editing processes for post-event recaps, streamlining collaborative workflows to ensure professional and prompt media releases.
  • Managed end-to-end video production as the Production Coordinator, executing critical, high-stakes decisions to effectively manage production risks and guarantee the successful delivery of final results.

Skills

Technical Skills: SwiftUI, Swift, Kotlin, Python, Flask, Next.js, HTML5, CSS3, JavaScript, PostgreSQL, MySQL, Prisma, Firebase, Cloud Firestore, REST APIs, Git & GitHub, Figma
Creative Media: Photography, Videography, Video & Photo Editing, Design, Visual Storytelling
Soft Skills: Leadership, Teamwork & Mentorship, Creative Problem Solving, Attention to Detail, Adaptability, Hard Working

Activities & Organizations

Coordinator of PDD Documentation — Student Union IMT 2026 — 2027
Coordinator of PDD Documentation — LD101 Aug — Nov 2025
Member of PDD Documentation — Student Union IMT 2025 — 2026
Member of Video Production — TEDx Mar — May 2025
Member of PDD Documentation — Narcobye Nov 2024 — Mar 2025
Member of Inventory — UCC (UC Chess Competition) Dec 2023 — Apr 2024
Member of PDD Documentation — Pomprov May 2025
Member of PDD Documentation — SLDR/C Batch 1 June 2025
Member of PDD Documentation — Lead Camp July 2025
Member of FNB Documentation — SLDR/C Batch 2 July 2025