Mark Jun Gersaniva, MSCS (CAR)
Software Engineer
Available for FreelanceAbout
Mark Jun Gersaniva is a full-stack web developer and educator based in Roxas City, Philippines. He currently builds production web applications at XtendOps using SvelteKit and TypeScript, and serves as part-time faculty at the University of Perpetual Help System. Passionate about teaching, Mark has been an IT professor at Filamer Christian University since 2013, handling courses in programming, software engineering, and databases. A Microsoft Education Ambassador and NC III–certified 2D animator, he is always expanding his skills and has completed the academic requirements for his Master of Science in Computer Science at Iloilo Science and Technology University. Across his career he has shipped projects ranging from international e-commerce and medical laboratory platforms to real-estate, inventory, and automated test-scoring systems, working with technologies such as SvelteKit, Python, PHP, and MongoDB. When not coding or teaching, Mark enjoys animation and game development.
Innovative, task-driven professional with 8 years of experience in IT industry and development across diverse industries. Equipped with a proven record of identifying and delivering the technology needs of the companies he has served — from real estate and telecommunications to retail, education, and healthcare — through practical, well-engineered solutions. Proficient in designing databases, building user interfaces, writing and testing code, and troubleshooting issues from the simple to the complex.
Mark currently works as a software engineer at XtendOps, where he handles both front-end and back-end development of production web applications using SvelteKit and TypeScript — designing server-side logic, building responsive user interfaces, and safeguarding quality with unit tests and Playwright end-to-end testing. He also builds and maintains the company's Webflow site, integrating blogs, events, YouTube videos, and podcasts. Drawing on lead-developer experience from previous roles, he ensures every application he ships stays performant, reliable, and responsive from the database to the browser.
His expertise spans modern full-stack JavaScript — Svelte, SvelteKit, and TypeScript — alongside Python with Django, PHP with Laravel and CodeIgniter, WordPress, and Webflow. He works comfortably across the data layer with MongoDB, MySQL, and PostgreSQL, and rounds out his toolkit with Tailwind CSS, Playwright testing, XState, Chart.js, and Flutter for mobile.
Work Experience
Software Engineer
April 2022 - PresentXtendOps (Iloilo PH)
Responsible for frontend and backend development using SvelteKit, alongside testing with unit tests and Playwright. Developed a website using Webflow. This website includes features such as blogs, events, and integration with YouTube for videos, as well as podcast integration.
Software Engineer
February 2021 - April 2022Telcom Live Content Inc. (Mandaluyong, Manila PH)
Led the design, development, and implementation of server-side logic and deployment processes. Demonstrated proficiency in PHP programming language and expertise in CodeIgniter 3 Framework and Laravel. Delegated tasks to a development team, providing guidance and support across all project phases.
Software Engineer
March 2020 - March 2021Pueblo de Panay Township (Roxas City, Capiz PH)
Contributed to the development of a real estate management system utilizing the PHP programming language and the CodeIgniter framework.
Software Engineer
April 2018 - February 2020Spring Valley Tech Corp. (Roxas City, Capiz PH)
Developed multiple projects using Python programming language and the Django Framework, with a primary focus on backend development. Worked on projects utilizing Wordpress. Acted as a Project Manager, responsible for planning, organizing, and directing project completion to ensure successful outcomes.
IT Professor
July 2013 - May 2020Filamer Christian University (Roxas City, Capiz PH)
College professor at the College of Computer Studies teaching Object Oriented Programming, Database Management, Software Engineering and Programming.
Projects
HWAY Korea — Check-in Seoul
Live travel-tech e-commerce platform that prepares inbound travelers for South Korea, selling bundled eSIM/USIM connectivity and the Check-in Seoul transit & payment card (partnered with Lotte Card and LG U+). Includes a product catalog, multi-step application and international checkout flow, an admin area, and full multi-language support. Backed by Supabase with custom Postgres functions.
Laboratory Management System
Full-stack medical laboratory platform managing the complete lab workflow — patient registry, test records, pending-result queues, and printable PDF reports. Features role-based authentication, emailed results via SendGrid, voice-dictated data entry with Google Cloud Speech, and Sentry error monitoring. Tested end-to-end with Playwright.
Pageant Judging & Tabulation System
Real-time competition scoring platform for pageant-style events, with a dedicated judge portal for live scoring and an admin dashboard managing candidates, scoring categories, and automated results tabulation. Includes role-based access (judge vs. admin), Chart.js result visualizations, and ExcelJS score-sheet exports. Built on MongoDB with XState-managed scoring workflows.
Inventory & Sales Management System
Multi-branch inventory and point-of-sale platform covering the full retail operation — product catalog, incoming deliveries, sales, and returns across locations. Includes role-based access control, an audit-log trail, Chart.js analytics dashboards, and ExcelJS report exports. Built on MongoDB with XState-driven workflow logic.
Blue Spark Solutions — Agency Website
Corporate website for a Philippine marketing and brand-activation agency, showcasing 30+ campaign case studies for brands including Globe, Unilever, Samsung, and Adidas. Designed and built with responsive layouts, interactive project galleries, a client-logo carousel, and contact integration.
Automated Test Scoring System (Web + Mobile)
A full-stack system that automatically grades physical test papers via phone camera. The SvelteKit web app manages tests and students and generates QR-coded answer sheets; the Flutter mobile app scans those sheets using OpenCV and Google ML Kit OCR, reads the QR codes to identify each paper, auto-scores the answers, and syncs results to the backend. Built with clean architecture — BLoC state management, dependency injection, and MongoDB — across iOS and Android.
PEL Fish — Fisheries Catch Management (Web + Mobile)
A fisheries data platform for recording and analyzing fish catches. The SvelteKit web app handles catch records with CSV bulk import, Leaflet maps of catch locations, and exportable Chart.js reports; the companion Flutter app gives fishers GPS-tagged catch logging with live weather forecasts (Open-Meteo) and mapping. Built on MongoDB, in collaboration with a mobile developer.
Digimon Up Companion
A companion app for Digimon UP players that tracks every progression system and recommends the best PvE, PvP, and boss builds — with each recommendation explaining why. You enter your account manually (no game API), and a rarity-and-mode-weighted scoring engine ranks your supports, skill cards, tactical memory, digivice, and food.
Education
Masters
2026Master of Science in Computer Science
Iloilo Science and Technology University
The Master of Science in Computer Science (MSCS) program of the College of Computer Studies is a two-year post-graduate course designed to train students in undertaking high-level research in the advanced field of computing.
College
2012Bachelor of Science in Computer Science
Filamer Christian University
Bachelor of Science in Computer Science (BSCS) is a four-year program that includes the study of computing concepts and theories, algorithmic foundations, and new developments in computing.
Skills
It takes talent to make money, but it takes brains to keep them.
Testimonials
I knew Mark Jun was the perfect guy for the IT stuff. He is a true professional. I've worked with him on almost all our major projects in our civic organization and IT needs in our company. He is deeply multi-tasker, he make sure to finish his task on or before deadlines. Trusted and creative even on the new world of IT.
Evy Grace Yap
Dealer Sales Coordinator,Petron Gasul LPG Industry
I first got to know Mark in a professional basis (we worked together at Spring Valley). Mark is THE IT GUY with endless creativity - He is one of the most productive person I have ever met. Always curious. Always takes initiatives. In a personal manner, Mark is also enthusiastic and very caring which makes him someone you would be friends with for life.
Rovi Anne Obamos
Administrative Assistant,Roxas Government
Mark has proven time and again to be quick on his feet in adapting new technologies and implementing tried and tested solutions to a variety of end-user needs. He has a keen observational mind and can analyze requirements and synthesize the right approach to a myriad of projects.
Jorge Cosgayon
Full Stack Developer/Solutions Architect
You're a coding Rocks star Mark! Keep it up!
Jayson Repil
Quality Assurance,Roxas Government
Mark Jun has been a qualified professor teaching different programming languages and other IT professional subjects in the University. With his acquired skills in the field of IT, he has grown professionally and is now a solid IT specialist. A passionate, self disciplined and open minded person, full of dreams to create a better future in the IT world.
Jonah Gafate
Dean, College of Computer Studies,Filamer Christian University
Mark was an excellent mentor, not only to me but also to all of my colleagues who were under his guiding hand during his time as our mentor. When it comes to the field of technology, particularly "programming", Mark's talent is unrivaled; But he is always willing to help and share his knowledge with others, and he is not selfish in this regard. I know this because I worked with him for a company once, and that's where I saw Mark's goodness in effect. I can say that Mark is a big part of my current success, and I owe him a huge respect and gratitude for that.
Kim Ralf Mentino
Co-Founder,Coders-Tribe IT Solutions
It has been a real pleasure working with Sir Mark. He has been very professional and very clear in all communications, which I appreciate.
Neo Jay Andong
Software Engineer,Telcom Live Content Inc.
Mark Jun was my college adviser and he is really good in programming, he can learn a programming language in no time. I could say that I'm one of his successor in IT industry. He's really a good friend of mine. mua mua tsup tsup!
Martin Rupert Bulquerin
Front-end Web Developer,XtendOps Inc.
Mark is one of my favorite, he is the team leader of our project and allocate appropriate tasks to his teammates. Mark is very excellent in all aspect of project development, he has a wide skill set and has a high level of professional knowledge of his job and the one I loved the most about Mark aside from his strong work ethic, he has a humurous character and soothing personality that creates a positive atmosphere.
Joyce E. Digma
Project Manager,Telcom Live Content Inc.
Mark as I know him works smart which is typical of a computer programmer. He finds solution to problems and works on it with passion.
Rey Cordenillo
Manager,Capiz Electric Cooperative
Let's Work Together
Have a project in mind? I'd love to hear about it.