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Tatsiana L.TL

Tatsiana L.

Senior Backend Architect & API Systems Engineer

EUR 360/Tag
Madrid, ES
15+ Jahre

Durchschnittliche Reaktionszeit: 1h

Über Tatsiana

I design backend systems that remain secure, stable, scalable, and maintainable as products grow.

With a Master’s degree in Computer Science and 15+ years of engineering experience, I specialize in architecture and implementation of high-performance backend platforms serving real production workloads.

Companies typically involve me when:

✅ a product backend must be designed correctly from day one
✅ multiple clients rely on one API (web, mobile, integrations)
✅ performance or scalability becomes a business risk
✅ systems grow complex and development slows down
✅ legacy backend requires careful refactoring without downtime

I combine architectural thinking with hands-on development, taking systems from early design through production deployment.

📍Core Backend & Architecture Expertise:
• Backend architecture & service design
• High-performance systems (Rust, Node.js)
• GraphQL & REST API architecture
• PostgreSQL data modeling & optimization
• Distributed & real-time systems
• Microservices & integrations
• Cloud infrastructure & DevOps workflows

Experience also includes distributed systems, blockchain infrastructure, and latency-sensitive platforms, including algorithmic trading bots & high-frequency trading systems.

📍Technologies:
• Languages: JavaScript, TypeScript, Rust, PHP, Solidity
• Backend: Node.js, Express.js, GraphQL, MERN, PERN, LAMP
• Databases: PostgreSQL, MySQL, MongoDB
• Cloud: AWS, DigitalOcean, Apache, Nginx, Render, Vercel, Cloudflare
• DevOps: Docker, CI/CD, Git workflows
• Integrations: Stripe, PayPal, OAuth, WebRTC, WebSockets, Custom APIs, Redis
• Blockchain: Web3, Smart Contracts, EVM ecosystems
• ML/AI: OpenAI, Lyzr, Base44

I work best with clients, startups and teams who value engineering quality, clean architecture, strong ownership, long-term maintainability, and clear communication.
  • Englisch

    Muttersprachlich oder zweisprachig

  • Spanisch

    Verhandlungssicher

  • Französisch

    Grundkenntnisse

  • Deutsch

    Grundkenntnisse

Nur remote
Führt Projekte hauptsächlich remote aus

Projekt- und Berufserfahrung

  • Cenebro
    Principal Engineer
    BANKEN & VERSICHERUNGEN
    November 2025 - Heute (7 Monate)
    Zürich, Switzerland
    Owned architecture and technical direction for distributed financial systems and high-load backend platforms. Designed scalable Rust and Node.js services, APIs, and microservices handling real production traffic. Improved system performance, reliability, and security, introduced clean architecture standards, optimized databases, implemented cloud deployments, and mentored engineering teams while delivering business-critical software solutions end-to-end.
    Rust IT-Architektur Softwarearchitektur Node.js GraphQL
  • CryptoMoto Ltd
    Chief Technology Officer
    AUTOMOBILSEKTOR
    September 2022 - Heute (3 Jahre und 9 Monate)
    England, United Kingdom
    Defined company technical vision and architecture strategy. Designed and implemented backend infrastructure for a decentralized social platform serving multiple production clients. Built scalable APIs, integrated Web3 infrastructure, established engineering processes, ensured system reliability and security, and led development from early concept through full production deployment and platform scaling.
    Node.js IT Architecture GraphQL PostgreSQL Externe API-Integration
  • Fluid Finance SA
    Head of Web Development
    BANKEN & VERSICHERUNGEN
    September 2021 - August 2022 (11 Monate)
    Geneva, Switzerland
    Led fintech engineering organization responsible for secure financial platforms and high-availability backend services. Architected scalable financial APIs and cloud infrastructure, introduced engineering standards and DevOps practices, improved delivery velocity, and increased platform reliability. Successfully scaled systems to handle high transaction volumes while maintaining low latency, security compliance, and fault-tolerant operations.
    Externe API-Integration API REST Datenbankmanagement (z. B. SQL, NoSQL) Cloud-Plattformen & Infrastruktur IT-Architektur

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Ausbildung und Abschlüsse

  • Master's degree
    Belarusian State University of Informatics and Radioelectronics
    2011
    Computer Science & Software Technology
  • Master's degree
    Belarusian State University
    2007
    International Relations and Affairs

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