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Peter P.
Fullstack Developer
Peter is a seasoned Full-Stack Developer with over twelve years of experience delivering scalable, high-performance web applications. He has deep expertise in Ruby on Rails, modern JavaScript frameworks, and cloud platforms including AWS and GCP.
Throughout his career, Peter has designed clean, maintainable architectures and consistently produced high-quality code. He is recognized for optimizing development processes, mentoring team members, and driving innovative solutions within agile environments.
Recently, Peter has focused on integrating large language models (LLMs), implementing prompt engineering, and building retrieval-augmented generation (RAG) architectures, creating intelligent and reliable software solutions that make a meaningful impact.
Main expertise
- Ruby on Rails 12 years
- JavaScript 12 years

- Node.js 5 years
Other skills
Selected experience
Employment
Software Engineer
Instructure - 1 year 2 months
Instructure is an EdTech platform that powers Canvas, the world’s #1 LMS, used by schools and universities across the globe. Note: Because Instructure uses Gerrit as its primary code repo system, my public GitHub activity is limited.
- Enhanced the Canvas platform to achieve full WCAG 2.2 AA accessibility compliance.
- Led the development of a course-level accessibility checker with an 8-person team, enabling instructors to identify and resolve accessibility issues across entire courses, improving efficiency and inclusivity.
- Implemented Amazon Bedrock with Anthropic Claude-3 Haiku to remediate accessibility issues in large-scale course and assignment content, processing thousands of pages to correct missing ALT text, improper heading structures, and other issues.
- Designed and optimized prompts tailored to accessibility use cases.
- Enhanced the LLM client with a rate-limiting feature to improve scalability and reliability.
Technologies:
- Technologies:
JavaScript
React.js
MongoDB
PostgreSQL
Ruby on Rails
AWS
Redis
CSS
TypeScript
Node.js
Express.js
Jenkins
SQL
Next.js
Nest.js
- NoSQL
Amazon Bedrock
AWS IAM
Senior Ruby Developer
Kisi - 2 years
Kisi is a U.S.–based technology company that develops cloud-based access control systems for physical spaces.
- Designed and delivered Incident Policies, enabling real-time alerts and proactive security measures.
- Transitioned the background job processor from Google Pub/Sub to Sidekiq Pro, improving scalability.
- Designed and delivered Weekly Place Analytics, providing a comprehensive weekly summary of facility usage.
- Integrated reporting with Google BigQuery to enable data-driven insights.
- Streamlined release workflows with zero-downtime migrations, enhancing deployment efficiency.
- Built a custom RAG pipeline using GCP services, enabling AI-powered search across internal documentation and improving knowledge discovery while reducing support overhead.
Technologies:
- Technologies:
JavaScript
React.js
PostgreSQL
Ruby on Rails
Redis
CSS
TypeScript
Node.js
SQL
Next.js
Google Cloud
- NoSQL
Vertex AI
GitHub Actions
RAG
Senior Full-Stack Developer
foodcircle - 6 months
foodcircle was a Berlin-based B2B marketplace connecting food producers and retailers across Europe, focused on simplifying the trade of organic and sustainable food products.
- Integrated the Rapyd payment gateway to support the company’s new brokerage business model.
- Optimized the Odoo ERP integration and collaborated closely with the finance team to automate multiple processes.
- Implemented an automated sync of customer and vendor invoices into Metabase via GCP.
Technologies:
- Technologies:
JavaScript
Vue.js
PostgreSQL
Ruby on Rails
Redis
CSS
TypeScript
SQL
Tailwind
Heroku
Full-Stack Engineer
Tripleseat - 6 years 11 months
Tripleseat is a U.S.-based SaaS company providing an event and sales management platform for restaurants, hotels, and venues.
- Built TripleseatDirect, supporting online bookings during the COVID pandemic, which was adopted by chains like Maggiano’s.
- Led a frontend redesign to enable responsive design.
- Added integrations with HubSpot, Mailchimp, Stripe CC/ACH, Clover Connect, and Shift4.
- Implemented full SCA support for Stripe credit card payments and extended the payment processor to accept ACH payments via Stripe and CardConnect.
- Built "VENUES by Tripleseat," a venue directory site that helped users find ideal restaurants, hotels, or unique venues for social events.
- Developed the "Discussion Center" feature, enabling users to manage messages in a Gmail-like interface.
Technologies:
- Technologies:
MySQL
JavaScript
React.js
MongoDB
Ruby on Rails
AWS
Redis
CSS
Bootstrap
GraphQL
SQL
- NoSQL
CircleCI
AWS IAM
Education
BSc.Computer Science
Óbuda University · 1995 - 1999
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