Andrei Sima
Barcelona, Spain
Backend Developer · Symfony, Laravel, SpringBoot
Backend developer with 5+ years of experience building fast, scalable systems in PHP and Java. Passionate about clean architecture and DevOps-friendly workflows.
Experience
Backend Developer
RichAudience • 2022 – Present
- Cut billing workload by 50% by building a finance module for monthly closures and invoicing in CRM.
- Synced data across 3+ companies in real time using RabbitMQ-based async flows.
- Led integration of 5 platforms, optimizing API calls and DB sync across teams.
- Created centralized RBAC API for secure role syncing across microservices.
- Built reporting tools (DataTables + API) handling millions of rows with caching/lazy load and ElasticSearch.
- Applied TDD + hexagonal architecture for reliable, modular services.
- Increased development speed by 40% by building reusable backend modules and Vue-integrated components shared across platforms.
Technical Support Engineer
WebHelp (Google) • 2021 – 2022
- Resolved 100+ complex issues with 95%+ CSAT, submitting bug reports used in 3+ confirmed fixes.
Freelance Web Developer
Freelance • 2020 – 2021
- Delivered 10+ SEO-optimized WordPress sites, boosting leads by 30% and cutting load times by 40%.
Full-Stack Developer Intern
Kriter • 2019 – 2021
- Migrated legacy sites to responsive layouts, increasing mobile engagement by 30%.
- Built ERP/CRM backends using SpringBoot and delivered UIs from Figma mockups.
Projects
This very portfolio website built with Astro, Vue and Tailwind CSS. Features responsive design and complete translations.
REST API for extracting data from a Web Novel website. Built with Laravel, Guzzle, and simple caching.
API Docs
BetaReader.ai
Work in ProgressTool for automated manuscript critiques and typo correction using GPT and LanguageTool with n-grams. Designed with Domain-Driven Design, job queues for external API handling, and CORS support for external clients.