Marius Mihail Ion

Senior Front-End Developer

Zaragoza, Spain

About

Senior Front-End Developer with 7+ years of experience specializing in Angular and modern web technologies. Proven track record of technical leadership, delivering high-quality solutions, and optimizing development workflows. Experienced in monorepo architecture (NX) for scalable enterprise applications. Proficient in translating designs from tools like Figma into functional, maintainable code. Passionate about clean code, performance optimization, unit testing (Jest, Karma), and creating maintainable applications. Skilled in mentoring junior developers and collaborating with cross-functional teams to deliver exceptional user experiences. Proficient in leveraging AI tools to enhance productivity and code quality.

Work experience

Avanade Spain

Senior Front-End Analyst (Angular)

2024 - Current

- Leading front-end development and technical direction for client projects, focusing on Angular and scalable architectures.
- Spearheaded scalable front-end solutions using Angular, exceeding client expectations with modern web technologies.
- Collaborated with cross-functional teams to align applications with complex client needs and business goals.
- Provided technical leadership, enforced coding standards, and mentored juniors to boost team performance.
- Focused on code quality, performance optimization, and security, delivering robust applications.
- Implemented NX monorepo architecture, enhancing code sharing and maintainability in large projects.
- Key Achievement: UNIR 'Mateo' Platform Technical Lead
- Led front-end development of a critical Backoffice app, improving code quality and collaboration.
- Defined scalable architecture with modern patterns for long-term maintainability.
- Developed core components like authentication flows and UI elements, meeting deadlines.
- Championed unit testing, increasing code coverage and reliability significantly.
Vermont Solutions

Senior Front-End Developer (Angular)

2023 - 2024

- Led Angular projects, guiding teams of up to 5 developers with technical expertise.
- Built complex UI components and data visualizations with ChartsJS, enhancing UX.
- Ensured high code quality via unit testing and static analysis, reducing technical debt.
- Worked with UX/UI designers to turn Figma designs into pixel-perfect Angular components.
- Integrated REST APIs with strong security practices across development cycles.
- Notable Projects:
- Santander Transaction Portal: Developed real-time monitoring, cut response time by 35%.
- Mobile Banking App: Led team of 5 to build employee transaction management app.
- Real Estate Portal: Improved team management and communication for Santander portal.
CloudAPPi

Mid-Level Front-End Developer (Angular, React)

2022 - 2022

- Adapted quickly to React and Angular, contributing to multiple fast-paced projects.
- Transitioned between projects of varying complexity, using both frameworks effectively.
- Regained React proficiency rapidly to meet urgent project demands successfully.
- Maintained productive coding and strong team communication throughout tenure.
- Delivered consistent results under tight deadlines, supporting project progress.
- Showcased flexibility and commitment by mastering tools to meet immediate needs.
- Worked collaboratively, ensuring smooth handoffs and team alignment on goals.
ENZO

Mid-Level Front-End Developer (Angular)

2021 - 2022

- Built reusable Angular components for a large-scale agricultural sector application.
- Created high-quality modules and services, enhancing app functionality globally.
- Used Angular Flex Layout and Material for responsive, user-friendly designs.
- Managed REST API integrations and reactive forms for seamless data handling.
- Engaged in English client meetings and improved project documentation clarity.
- Trained new team members, boosting efficiency and knowledge sharing in team.
- Contributed to a major international client, delivering impactful solutions.
Freelance Web Developer

WordPress Developer

2020 - 2021

- Designed custom WordPress sites, expanding technical and client management skills.
- Improved self-management and decision-making through independent project work.
- Gained expertise in SEO, digital marketing, and website security practices.
- Optimized resources for online platforms, enhancing site performance broadly.
- Used Photoshop and Canva to craft visually appealing website assets for clients.
- Delivered diverse projects, meeting unique client needs with tailored solutions.
- Strengthened planning skills, ensuring timely delivery across all engagements.
Altran

Mid-Level Full Stack Developer (.NET)

2020 - 2020
IO Digital

Mid-Level Full Stack Developer (.NET)

2018 - 2019
STRATESYS

Junior Full Stack Developer (.NET)

2018 - 2018

Projects

Al-Grano Telegram Summarization Bot •

A powerful Telegram bot that helps users summarize various types of content, from chat conversations to videos, documents, and web articles. The bot leverages OpenAI's advanced language models to generate concise, informative summaries.

Text SummarizationMedia SummarizationYouTube TranscriptsDocument ParsingDaily SummariesUser ManagementCooldown SystemPython 3.12OpenAISQLite
PixelProphetBot •

A feature-rich Telegram bot that generates high-quality images from text descriptions using advanced AI models. Built with Python and the Telegram Bot API, it offers a seamless experience for creating custom images directly in Telegram chats.

Text-to-Image GenerationMultiple StylesBatch GenerationImage AnalysisCustomizable ConfigurationPython 3.12OpenAI APIReplicate APISQLitePydantic
mihailmariusiondev.github.io •

This project is a minimalist CV designed for web and pdf. It uses the CV scheme from jsonresume.org and is based on the design of Bartosz Jarocki. It is a fork of the 'minimalist-portfolio-json' template by midudev. The project is built with the Astro framework, Typescript, and the Ninja Keys library for keyboard shortcuts.

AstroTypescriptNinja KeysJSON ResumeResponsive DesignDark ModeSEO Optimized
ArkanTranscripter Bot •

A Telegram bot designed to transcribe YouTube videos, directly sent videos, and audio messages. Leveraging the YouTube Transcript API and OpenAI's advanced models, it provides accurate and enhanced transcriptions to improve accessibility and convenience within Telegram chats.

YouTube TranscriptionVideo TranscriptionAudio TranscriptionEnhanced TranscriptionsOpenAI GPT-4o miniAutomatic ProcessingText File OutputConcurrency ManagementCaching MechanismPython 3.12
Fixerino Bot •

A Telegram bot that automatically converts links from Twitter, X, Instagram, and TikTok to their respective frontend alternatives for a better viewing experience, solving the common issue of media previews not displaying properly in Telegram chats.

Automatic Link ConversionSocial Media IntegrationConfigurable SettingsUser-Friendly InterfaceTwitter/X SupportInstagram SupportTikTok SupportPython 3.12SQLiteDeployment Ready

Skills

Angular
TypeScript
JavaScript
HTML
CSS
Git (gitflow)
GitHub
React
RxJS
REST API Integration
Angular Material
PrimeNG
Unit Testing
NX (monorepo)
CI/CD
Agile Methodologies
Visual Studio Code
Cursor
Figma
Storybook

Certifications

Angular (Intermediate) Certificate

HackerRank

2024
Angular (Basic) Certificate

HackerRank

2024
JavaScript (Intermediate) Certificate

HackerRank

2024
JavaScript (Basic) Certificate

HackerRank

2024
English Proficiency Test (C2)

goFLUENT

2025
Super Ninja

Ninja Talent

2023
Angular Level 2 Certification

Interstate 21

2022
API OWNER

APIAddicts

2022

Education

Joyfe College

2017 - 2018

Higher Technician in Multi-platform Applications Development
San Gabriel College

2015 - 2016

Technician in Microcomputer Systems and Networks

Languages

Spanish Native Speaker
English Full Professional
Romanian Native Speaker

References

“Marius was a great professional to work with. We worked together at Enzo, and his work ethic is impeccable and he is very easy to work with. He goes above and beyond when you ask for help and guidance.” - Gonzalo Rodríguez Muñoz, Enzo
“Marius has demonstrated consistently a deep technical knowledge in frontend development with the Angular framework, developing efficient code, updated to the latest practices of the community and always avoiding technical debt. It is clear that he thinks long-term when making decisions, as he quickly discards 'patch' solutions that may work today but be problematic tomorrow.” - José Luis Murcia Gámez, UNIR Project.
“Marius worked efficiently, building the product for the client and improving the quality of everything related to the frontend, generating unit tests, refactoring inherited code and even informing the provider's frontend architecture team about problems or improvements to implement in their libraries.” - Guillermo Leiva Ocaña, UNIR Project
“Marius has participated in the UNIR/BackOffice project since his arrival at Avanade, contributing knowledge and experience in Frontend development with Angular, from the point of view of implementing functionality from scratch, design, coding, unit testing and reviewing the quality of his own and existing code base. I would definitely be happy to be able to count on him again in future projects with Angular development needs to ensure a quality delivery.” - Bernabé Giral Soto, UNIR Project
“Great partner, he has done a great job in his last project demonstrating that he can design and build business applications successfully.” - Antonio Bermúdez Rodríguez, UNIR Project