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Hi, I'm Anna Sofrona —

Software engineer.
Independent product builder.

I build reliable backend systems in my day job, and independently design, build, and ship my own products end to end — from concept and UX to architecture and release.

View my workGet in touch
Currently Mid-Level Software Engineer at Openbet Hellas

Selected work

Products I've designed and shipped

Backend & system designIn development

Pulse

Website & API monitoring platform

A monitoring platform that checks the health, uptime, and performance of websites and APIs, and turns raw check results into clear signal on a live dashboard.

System DesignBackendAPIObservability
View case study
Full-stack product engineeringLive

theundo

Everyday task management, without the overhead

Product Concept · UI Design · Full-Stack Development

Designed and built independently from concept to production.

A focused to-do app for iPhone and Android built around one idea: capture a thought in plain language and get an organized task back, with no account and no setup required.

ProductMobileFull-StackUX
View case study
Frontend engineering & content architectureLive

Cosy Coloring Corner

A coloring brand and content platform

A production content and commerce site for an original coloring brand — a storefront, an evergreen blog, free downloadable content, and an interactive in-browser coloring experience.

Next.jsFrontendSEOContent
View case study

Experience

Where I've worked

  1. Mid-Level Software Engineer

    Jul 2022 — Present

    Openbet Hellas

    • Delivered customer-specific platform features across the full development lifecycle, from technical analysis through implementation and release.
    • Supported production releases and high-traffic event monitoring, including major international sporting events, keeping the platform stable through peak load.
    • Contributed to CI/CD and deployment tooling using Jenkins, Docker-based test environments, and RPM-based deployments across multiple environments.
    • Built internal tooling to automate post-deployment validation — version verification and log parsing — cutting down manual deployment checks.
    • Supported new engineer onboarding as a buddy and collaborated with cross-functional teams to scope and deliver customer requirements.

  2. Full-Stack Engineer

    Nov 2021 — Jul 2022

    Multiapp Solutions

    • Built travel-industry web solutions, including an analytics dashboard for a travel agency and booking engines for multiple ferry companies.
    • Created high-fidelity UI/UX prototypes and worked directly with clients to translate business requirements into technical solutions.

  3. Web Developer

    Oct 2020 — Nov 2021

    Winmasters

    • Contributed to development and maintenance of the Affiliate Platform, plus design and prototyping for the next-generation Winmasters platform.
    • Ran UAT and release validation, working with external frontend teams to troubleshoot issues and support feature releases.

Beyond the code

I don't just implement features.
I build products.

I enjoy taking an idea through the entire journey — understanding the problem, designing the interface, making technical decisions, building the system, and shipping it.

IdeaProduct ThinkingUI/UX DesignArchitectureBuildShipIterate
01

Product thinking

What should we build — and why?

02

Design

How should it look, feel, and behave for the person using it?

03

Engineering

How should it work, scale, and remain maintainable?

04

Shipping

How do we turn it into something people can actually use?

Design lives inside the pipeline, not outside it

Concept→Figma→Architecture→Code→Production

Build log

Continuous shipping, in short entries.

A running log of what's changed across the products above — not a highlight reel, just what actually shipped.

Sep 2026theundoShipped the Kanban view and tightened up the quick-add parser's date recognition.
Aug 2026Cosy Coloring CornerPublished a new seasonal coloring book and refreshed the Coloring Lounge's autumn scene.
Aug 2026PulseBuilt the incident-scoped alerting layer on top of the evaluator's debounce logic.
Jul 2026theundoOpened early access and started onboarding the first wait-list users.
Jun 2026PulseStood up the multi-region checker workers and the time-series ingestion pipeline.
May 2026Cosy Coloring CornerMoved the blog to statically generated pages and cleaned up Core Web Vitals.
Apr 2026theundoRebuilt quick-add around natural-language parsing instead of manual fields.
Mar 2026PulseStarted designing the monitor data model and the check-scheduling engine.

Open source / experiments

Smaller things, out in the open.

Tools, libraries, and experiments I build outside of the three products above — mostly to learn something or scratch an itch.

deployChecker

A lightweight CLI for automated post-deployment verification.

Python
docker-monitor-saas

An early, still-rough exploration of containerized monitoring and health-check tooling.

Python
devCSS

A lightweight CSS library for devs, with a small live demo.

SCSS
notes-manager

A simple cross-platform notes app — CRUD over Firebase, built with Flutter.

Dart2
an-overlay-anonymous-network

A small anonymous overlay network, built in Python to learn how proxy layers work.

Python
All repositories on GitHub

About / Technologies

A quick snapshot.

I build reliable backend systems in my day job, and independently design, build, and ship my own products end to end — from concept and UX to architecture and release.

More about my background

Languages

TypeScriptJavaScriptSQLHTML & CSS

Frontend

ReactNext.jsAstroTailwind CSSResponsive & accessible UI

Backend & Systems

Node.jsREST APIsPostgreSQLSystem designQueues & scheduled jobs

Infrastructure & Delivery

DockerJenkinsCI/CD pipelinesMulti-environment release management

Practice

Product thinkingUX prototypingTechnical analysisCross-functional delivery

Design & Product

FigmaWeb DesignUI DesignResponsive DesignPrototyping

Contact

Have something worth building?

I'm always interested in engineering problems with real constraints — and in meeting people building their own things.

Email

[email protected]

GitHub

github.com/lumoswitch

LinkedIn

www.linkedin.com/in/anna-sofrona/