Viktor Bernáth

Senior Full Stack Developer with 10+ years of experience delivering cloud-based, scalable web applications in agile environments. Strong expertise in PHP, Python, JavaScript, React, and API-driven architectures, with hands-on experience in AWS S3, Docker, CI/CD, and Bitbucket Pipelines. Proven ability to translate business and technical requirements into reliable, production-ready solutions, with experience mentoring junior developers and collaborating directly with clients.

Hands-on experience integrating and productionizing LLM-based features, with a strong focus on reliability, safety, and real-world product usage.

Full Stack Developer at Axis12 Ltd. (2017-01 – Present)

Senior Full Stack Developer delivering cloud-based web applications and AI-integrated features in production environments.

• Developed and maintained cloud-based backend systems using PHP and Python in production environments
• Developed and maintained Vue.js frontend components over the long term, iterating on features based on evolving business requirements
• Leveraged GitHub Copilot with Claude for building applications, accelerating development workflows and improving code quality through AI-assisted programming
• Integrated OpenAI-based language models into a customer-facing application, enabling AI-assisted functionality trained on domain-specific datasets
• Collaborated on dataset preparation and prompt configuration, improving response relevance and consistency
• Debugged AI behavior in production and implemented safeguards, filtering, and fallback mechanisms to prevent unsafe or incorrect outputs
• Designed API-driven and microservice-style architectures to support scalability and maintainability
• Implemented CI/CD pipelines using Git and Bitbucket Pipelines and containerized applications with Docker
• Worked in globally distributed teams across Berlin, London, New Zealand, Malaysia, and Nepal

Freelance Full Stack Developer at Self-Employed (2020-06 – Present)

Independent full stack development services for cloud-hosted backend services and React-based frontend applications.

• Built and maintained cloud-hosted backend services using Django and Python
• Designed and implemented REST APIs consumed by React-based frontends
• Applied microservice-style separation of concerns to improve extensibility and maintainability
• Implemented CI/CD workflows using Bitbucket Pipelines for automated testing and deployment

Web Developer at Pre-School Learning Alliance (2016-06 – 2017-06)

Sole developer responsible for delivering internal and public-facing web platforms.

• Delivered multiple internal and public-facing web platforms as the sole developer
• Migrated and modernized legacy Drupal and PHP systems
• Gathered and analyzed requirements directly from stakeholders and end users

PHP / Drupal Developer at 5net Informatics Ltd. (2015-05 – 2016-05)

Enterprise Drupal development and system migration specialist.

• Worked on enterprise Drupal projects and system migrations
• Collaborated with project managers and clients to deliver feature enhancements

Senior PHP Developer at Woodpecker Software Ltd. (2013-05 – 2015-05)

Senior developer extending custom ERP platform with mentoring responsibilities.

• Extended a custom ERP platform with new modules for retail and bookkeeping use cases
• Mentored junior developers and conducted code reviews
• Worked closely with clients and shareholders to align technical delivery with business goals

Web Programmer in Web Programming – Lia Foundation Kindergarten and Secondary School (2011-01 – 2013-01)