Iván Jähnke

UI/UX Designer & FullStack Developer

Madrid, Spain

About me

Developer used to working under pressure, with broad experience in software development, mainly in the healthcare sector. Founder of MsArkNet, where I build full stack and AI solutions. Front-end oriented profile, also comfortable with back-end and devops tasks. Strong data analysis skills and team management experience. I consider myself a resourceful, good-humoured person who solves problems easily.

Work experience

Aszendit Tech•Intermundial
Backend PHP Developer
May 2026 - Present
Backend PHP development and maintenance for Intermundial (travel insurance): evolving legacy stacks, dockerizing environments and building a new API with Symfony, PHP 8 and FrankenPHP.
- Development of a new API with Symfony, PHP 8 and FrankenPHP
- Legacy monolith modernization and integrations with partners and insurers through the new API
- Maintenance and evolution of legacy PHP applications (eZ Publish 5, Symfony 2, CodeIgniter 2)
- Dockerization of legacy stacks with Docker, docker-compose, Traefik and Makefiles
- Debugging and bug fixing on PHP 5.6/7.x
- MySQL/MariaDB and Oracle database management
- Salesforce and Adyen integrations in sandbox environments
- Local TLS setup with mkcert and email capture with Mailpit
Aszendit Tech•Telefónica STV
Full Stack Developer
Nov 2025 - Feb 2026
Resolution of critical incidents in the core of Telefónica STV's TV platform, ensuring application stability and performance in large-scale environments (Set-Top Boxes and Smart TVs).
- Resolution of critical incidents in the platform Core on Set-Top Boxes and Smart TVs
- Corrective maintenance and optimization of UI components: settings logic (Settings), recording services (PVR) and complex state management
- Screen and button development for the TV application with vanilla JavaScript
- Deep technical diagnostics and multi-channel debugging within agile development cycles, ensuring robust, regression-free deliveries
- Development and use of AI agents for debugging tasks
Aszendit Tech•Telefónica Prototypes Aura
Full Stack Developer
Jul 2023 - Sep 2025
Development of web applications with modular, scalable and maintainable architectures for Telefónica Prototypes Aura. Building AI agents and language models (LLMs), and designing real-time human-AI conversational experiences.
- Building AI agents and language models (LLMs)
- UX/UI design and development of experiences on the AURA platform
- Deployment and service management on Azure (Functions, Storage, App Services)
- Integration of Azure cognitive speech into interactive web applications
- Design of advanced real-time human-AI conversational experiences
- Firebase management
- Implementation of metrics with GA4 and Looker Studio
- Creation of a component library in Storybook, strengthening the visual and technical consistency of the projects
IMAGINADS
Team Leader, Analyst, Full Stack Developer
Sep 2022 - Jul 2023
Scrum master and full stack development: Angular front-end and Python back-end. Server infrastructure development.
- Scrum Master: coordination of an agile team of X people, ensuring on-time and proper deliveries
- Frontend development in Angular and Backend in Python, integrating REST services and WebSockets
- Infrastructure implementation on virtualized servers (VMware/Proxmox) and web deployments
- Development of socket connections for video streaming at interactive events
Featured
Freelance•MsArkNet
Founder · Full Stack Developer · AI Developer
Jul 2021 - Dec 2023
Custom website development for each client, with bespoke designs and SEO marketing.
- Website development with CMS (WordPress, Drupal) and modern frameworks (React, Angular, Astro)
- Graphic design and user experience for clients across different sectors
- SEO marketing strategies and positioning campaigns that increased clients' online visibility
- Web infrastructure setup and configuration: hosting, domains, SSL certificates, email
- Full corporate email management with Google Workspace
- Operating system and software setup and administration for companies
Kingston Audiovisuales
Audiovisual Technician - Freelance
Jul 2021 - Aug 2022
Audiovisual event production and setup.
- Coordination and setup of large-scale corporate and cultural events
- Configuration of sound, lighting and projection equipment in professional environments
- Live technical assistance to ensure smooth experiences
- Event production: recording, streaming, zoom
Navandu Technologies
Full Stack Developer
Apr 2015 - Jul 2021
Full stack development and Drupal CMS management, mainly for the healthcare sector.
- Development of web solutions in Drupal for clients in the education and business sectors
- Creation of custom modules and performance optimization
- Integration with external services (REST APIs, payment gateways, etc.)
- Hosting environment management and long-term technical maintenance of projects
Expacom Sistemas SI
Help Desk
Apr 2013 - Jun 2013
Technical support and local network administration.
- Administration and support of local networks in a business environment
- Installation and configuration of Windows/Linux operating systems for clients and servers
- Network device configuration (CISCO phones, WatchGuard Fireware XTM)
- Diagnosis and resolution of technical incidents

Education

IES Tetuán de las Victorias
Jan 2013 - Jan 2015
Higher Vocational Degree · Web Application Development
IES Tetuán de las Victorias
Jan 2011 - Jan 2013
Vocational Degree · Technician in Microcomputer Systems and Networks

Licenses and certifications

AI Development Master
BIG school
Mar 2026
Introduction to AI Development Course
BIG school
Oct 2025
Web and mobile accessibility testing
Abstracta
May 2025
Certification Exam - Fireware XTM v11.6 Basics
WatchGuard Technologies
Apr 2017

Projects

Corporate website
MsArkNetOnline
Corporate website: services, projects, blog, and automated contact and briefing forms
ServicesBlogPast workFormsIntegrationsAutomationsMultilingual
Microservice
DocraftOnline
Microservice that generates Word and PDF documents from templates with variables
AutomationsIntegrations
Microservice
PdfcraftOnline
Microservice that automatically fills in PDF forms from variables
AutomationsIntegrations
Corporate website
Sabor & SalsaOnline
Website for a Peruvian street food restaurant: menu, events, map and automated bookings
BookingsCatalogFormsLocation and mapsWhatsApp contactIntegrationsAutomations
Corporate website
ElectroJaytorOnline
Corporate website for an electrical services company in Seville, with blog and contact form
ServicesPast workBlogQuote requestsWhatsApp contact
Portfolio
Hidalgo - Psychology
Website for a workplace psychology practice in Madrid: services, method, FAQ and contact with map
ServicesFAQLocation and mapsWhatsApp contact
Portfolio
Detalles Dulces
Website for an artisan chocolate and bouquet workshop in Valencia, with gallery and WhatsApp orders
GalleryFAQWhatsApp contact

Skills

HTML
CSS
Tailwind
JavaScript
TypeScript
Node
PHP
React
Angular
Drupal
MySQL
Firebase
Git
GitHub
Docker
Kubernetes
Azure
Figma
Python
Scrum

Languages

SpanishNative
EnglishBeginner (A1)