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Siarhei Balabanovich

@siarheibalabanovich

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Full-Stack Engineer at ALMAX Design & Development Agency who delivered a subscription-based mobile proxy SaaS platform.

Portugal

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At ALMAX Design & Development Agency, I designed, developed, and deployed a subscription-based mobile proxy SaaS platform with customer and administration portals. I implemented its React and TypeScript frontend, FastAPI services, PostgreSQL data models, authentication, and Stripe subscription billing.

As an Independent Full-Stack Developer, I’ve built web applications, SaaS solutions, and WordPress platforms for international clients. On one project, I improved Lighthouse Mobile Performance from 60 to 92, reached Core Web Vitals Good thresholds, and increased online bookings from 0 to 32 per week after launch.

Experience

Work history, roles, and key accomplishments

Current

Full-Stack Engineer

Current

ALMAX Design & Development Agency

Feb 2025 - Present (1 year 8 months)

Designed, developed and deployed a subscription-based SaaS platform for mobile proxy services, including customer and admin portals, authentication, billing, and analytics. Architected React/TypeScript SPA and Python/FastAPI backend with PostgreSQL, Docker, and AWS deployment.

React TypeScript NodeJS Python fastAPI SQLAlchemy Pydantic Alembic PostgreSQL Redis JWT RBAC OAuth Stripe API Docker AWS EC2 S3 Amazon Cloudfront Amplify Nginx Linux CI CD

Current

Independent Full-Stack Developer

Current

Self Employed

Aug 2022 - Present (4 years 2 months)

Designed, developed and maintained web applications, SaaS solutions, WordPress platforms and business websites for international clients, managing projects from discovery through deployment and support. Improved Lighthouse Mobile Performance from 60 to 92 and increased online bookings from 0 to 32 per week.

React TypeScript NodeJS Python fastAPI PHP WordPress WooCommerce ACF Pro Gutenberg Blocks Elementor REST APIs Payment Gateways Authentication CRM AWS Docker Nginx Linux SEO Core Web Vitals

Frontend Developer & WordPress Developer

ALMAX Design & Development Agency

May 2024 - Jan 2025 (8 months)

Delivered 18+ responsive websites and WooCommerce stores, converting Figma designs to production. Improved Lighthouse Mobile Performance from 65 to 90 and SEO from 80 to 95 through optimization.