Software Engineer · Lithuania

Aistis Marčiauskas

Senior backend / full-stack engineer building production software across fintech, travel platforms, registration systems, access control, and freelance delivery.

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Backend systems Fintech workflows Legacy modernization Infrastructure AI automation

Experience

Career timeline

Apr 2025 - Present · Vilnius

Current role

Senior Software Engineer · BnP Finance

  • Designed and maintained backend systems supporting loan issuance and customer lifecycle management.
  • Built and improved API-driven services using PHP, Symfony, and Laravel.
  • Optimized MySQL queries and refactored legacy systems to improve performance and stability.
  • Integrated external services supporting payments and operational workflows.
  • Integrated AI into development, testing, planning, communication, and task management.
Jan 2023 - Present · Vilnius

Independent work

Freelance · MB TapTechTap

Freelance engineering across backend systems, web products, infrastructure, automation, integrations, and modern development workflows.

Jan 2019 - Dec 2022 · Vilnius

Platform engineering

Software Engineer · HomeToGo

  • Led anti-crawling work and implemented ML-based methods for detecting Level 3 crawlers.
  • Improved platform speed and capacity through research and infrastructure changes.
  • Improved user experience through investigation, execution, and validation of initiatives.
Nov 2016 - Dec 2018 · Vilnius

Registration systems

Web Developer · Orakulas Services

  • Developed international registration workflows with authentication methods and integrations.
  • Improved registration reliability through system integrations, maintenance, and support.
  • Enhanced security through user verification and fraud monitoring.
Sep 2014 - Oct 2016 · Vilnius

IT solutions

Web Developer · nSoft, UAB

  • Created web services for access control, ticketing, warehousing, and other IT solutions.
  • Managed an international project from start to finish.
  • Improved development team processes and adopted ISO standards in development work.
Oct 2012 - Aug 2014 · Vilnius

Early engineering

Software Engineer · UAB SS Solutions

  • Built software for access control, time management, and statistics solutions.
  • Completed difficult projects that other vendors had been unable to finish.

Technology

Production stack

PHPSymfonyLaravelPythonJavaScriptVue MySQLPostgreSQLRedisRabbitMQElasticsearchAerospike DockerAWSJenkinsGitHub ActionsKibanaNewRelic RedshiftJupyterOrange3AB testsLLMs / agents