Elena C.

Full-Stack PHP Developer | Laravel | Angular | API Development | AI Integration I am a results-driven Full-Stack PHP Developer with around 11 years of experience in IT including 8 years of experience in web development, specializing in Laravel, Angular, API and AI integrations. I focus on building scalable, efficient, and user-friendly applications while following clean code principles and best development practices. I have worked on products in different domains, including fintech-style expense sharing platforms and AI-powered SaaS systems for sales automation and conversational CRM. My experience includes building backend systems from scratch, designing business-critical logic, integrating third-party services, improving existing architectures, and supporting products through growth and continuous change. My last interesting projects: In WhoPaid, I served as the lead backend engineer and built the backend foundation of a mobile-first expense sharing platform from the ground up. I worked on the architecture, database design, core REST APIs, authentication, groups and friends management, expense tracking, repayments, balances, debt simplification, onboarding and invitation flows, notifications, subscriptions, admin tooling, and backend maintainability processes including testing, CI/CD, documentation, and refactoring. In Salesdep, I worked on an AI-powered sales automation platform that combined CRM workflows, multichannel messaging, knowledge-base driven assistants, and meeting automation. I contributed to backend logic for AI assistants, multilingual behavior, knowledge-base functionality, meeting scheduling, Google Calendar integration, CRM synchronization, channel-related file handling, chat workflows, and integrations with services such as OpenAI, HubSpot, Pipedrive, WhatsApp, Instagram, and Telegram. I also contributed to architectural improvements, refactoring, and test coverage in a microservice-based environment. Key Achievements & Contributions: Built and evolved backend systems for SaaS products from initial architecture to production support Designed and implemented complex business logic for financial and workflow-heavy domains Developed REST APIs, admin capabilities, onboarding flows, and communication-related features Worked on AI assistant orchestration, prompt behavior, multilingual logic, and automation workflows Integrated external services including OpenAI, Stripe, Google Calendar, HubSpot, and Pipedrive Improved maintainability through refactoring, test coverage, logging, API documentation, and cleaner abstractions Contributed to frontend modernization efforts involving AngularJS, Angular, and Vue Implemented background jobs, cron-based automation, and infrastructure-related backend improvements Worked with Stripe and OneSignal Technical Expertise: Backend: PHP, Laravel, Doctrine, REST APIs Frontend: Angular, AngularJS, JavaScript, Vue Databases: MySQL, PostgreSQL Integrations: OpenAI, Stripe, Google Calendar, HubSpot, Pipedrive, OneSignal Tools & DevOps: Docker, Git, CI/CD, PHPUnit, Swagger/OpenAPI, PHPCS Other: AI integrations, multilingual logic, background processing, microservice collaboration I care deeply about writing clear, maintainable code and building solutions that are both technically solid and valuable for the business. I enjoy solving complex product problems, improving existing systems, and creating scalable applications that support real user needs. I am passionate about solving complex problems, improving performance, and building scalable solutions that make a real impact. Let’s create something amazing together!