Athens, GreeceOpen to work

Dimitrios
Viennas.

Software Developer

I build clean, accessible front-ends and turn business data into reports people can act on — and I use AI as a daily collaborator to ship faster and better.

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Database Development
01

Profile

I'm a software developer with close to five years of experience building and maintaining production web interfaces for digital education platforms, now focused on database development, SQL, and business & CRM reporting.

I care about clean, accessible front-ends and about turning data into reports a business can act on. I ship side projects end to end — from schema design to the pixel — and I work fluently with AI tools across the whole workflow: prototyping, code review, query design and documentation.

~5years building production software
4side projects shipped end to end
2working languages — Greek & English
02

Experience

05.2026 — 07.2026
Software Developer
MRT Solutions SA
Full-time · Hybrid · Athens
  • Developed application features in JavaScript alongside database work.
  • Built and optimized SQL queries and stored procedures supporting core business operations.
  • Delivered business & CRM reporting giving teams clear visibility into key metrics.
09.2021 — 05.2026
Frontend Developer
Express Publishing
Full-time · Remote
  • Built and maintained the UI for digital education platforms used by schools and learners.
  • Implemented responsive interfaces with HTML5 and CSS3, ensuring cross-browser compatibility and accessibility.
  • Collaborated closely with designers within an Agile team and improved front-end consistency across products.
03

Selected projects

SQL Data Warehouse

End-to-end SQL Server warehouse: ERP & CRM data unified into a star schema, with cleaning, transformation and analytics queries.

SQL ServerData ModelingStar SchemaETL

SQL Data Analytics

Business-data analytics: customer segmentation and ranking, time-based trends and cumulative metrics for reporting.

SQLData AnalysisBusiness Insights

MovieHub

Framework-free movie search on the TMDB API — live search, detail views and favorites via localStorage.

Vanilla JSREST APIlocalStorage

Budget App

Budget tracker with live totals, category charts and a monthly filter; dark, responsive UI with local persistence.

Vanilla JSChart.jsResponsive
04

Query my career

This is a real SQLite database running in your browser — and my CV is the data. Write your own SQL or start from a ready-made query.

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The database loads the first time you scroll here. Press Run.

05

Skills

Languages & Web

JavaScriptSQLHTML5CSS3REST APIs

Focus areas

Database DevelopmentBusiness & CRM ReportingResponsive DesignAccessibility

Tools & ways of working

Git & GitHubVercelAI-assisted development
06 — AI

I build with AI, not around it

AI tools are part of my daily workflow — not a novelty. I know how to get real value out of them: precise prompting, critical review of what they produce, and knowing when to trust them and when not to. This site was built in collaboration with AI, end to end.

Prototype faster

From idea to working prototype in hours — AI-assisted scaffolding, then hand-tuned code I fully understand and own.

Sharper SQL & reviews

I use AI to pressure-test queries, explore optimization paths and review code — always validating against real data.

Ready for AI-first teams

Comfortable with LLM-powered workflows and eager to help teams fold AI into how they build and report.

06 — Contact

Let's talk.

Recruiter, hiring manager, or fellow developer — I'd love to hear from you. Athens-based, open to hybrid or remote.