Stanislav Pintjuk

Took end-to-end ownership of a major platform modernization, breaking down tightly coupled legacy frontend into a maintainable architecture. Designed and implemented customer-facing onboarding and payment flows using Stripe, including 3D Secure (3DS) handling as part of a migration from invoice-based billing to card-based subscriptions. Operated close to production and real customer behavior, handling edge cases and stabilizing the system during and after rollout. Successfully delivered a new billing and onboarding system that enabled over 900 customers to purchase parking permits in the first week of launch.

• PostgreSQL
• Rust
• Architecture
• Microservices
• Svelte 5
• React Native
• AWS
• Kubernetes
• TypeScript
• Stripe
• 3DS
• Payment Onboarding

Worked on high-traffic e-commerce product pages with focus on performance, accessibility, and scalable frontend architecture. Improved Core Web Vitals (LCP/FCP), moving pages from 'Needs improvement' to stable 'Good' performance through SSR strategies, rendering optimizations, and asset improvements. Actively identified and resolved accessibility issues, ensuring WCAG compliance across components. Contributed to improving reusable frontend component architecture used across multiple teams in a large-scale organization.

• React
• Next.js
• TypeScript
• Sass
• Accessibility
• WCAG
• SSR
• Storybook
• Figma
• GitHub Actions
• Performance Optimization

Built customer-facing onboarding, marketing, and self-service flows for Tele2’s broadband brand Penny. Implemented a React and TypeScript application with Redux and a custom SSR setup using Express. Integrated CMS-driven content delivery and Adyen payment services to support credit card onboarding flows. Worked on complex transactional user journeys involving payment edge cases, failure states, and customer communication challenges. The platform reached production users before being discontinued due to a strategic business decision.

• React
• TypeScript
• Redux
• Node.js
• Express
• SSR
• CMS Integration
• Adyen
• Payment Flows
• Customer Onboarding
• Frontend Architecture
• Telecom Platform

Developed a multi-step loan application flow with complex form logic and cross-step validation. Built reusable form components and ensured consistency across a large transactional user journey. Worked within an established design system and translated UX requirements into production-ready components while handling edge cases across navigation, validation, and state transitions. Successfully delivered a production system used by real loan applicants.

• React
• TypeScript
• Forms
• Frontend Architecture
• Validation Logic
• Design Systems
• Banking

Worked across multiple mission-critical banking systems, starting with a platform-wide modernization of build and release pipelines (SVN to Git migration, CI/CD automation using Octopus Deploy and PowerShell), reducing release cycles from days to hours. Built backend integration APIs for external banking partners in a German loan application flow. Later developed a React-based internal support system for call center operations, including telephony integration and preloading customer context to improve agent efficiency. Operated across multiple systems in parallel in a high-complexity environment.

• .NET
• C#
• React
• Octopus Deploy
• CI/CD
• Backend APIs
• System Integration
• Telephony Integration
• Banking Systems

Built a new public-facing municipal website from scratch using Episerver CMS. Designed content structures, page models, and both frontend and backend logic. Implemented search functionality using Episerver Find and worked closely with UX design in a small team. Delivered a full replacement of the previous website, which remains in production today.

• Episerver
• C#
• Razor Pages
• CMS Architecture
• Episerver Find
• Fullstack Development
• UX Collaboration

Maintained and evolved a public-facing website, taking ownership of a critical search migration after a third-party API was discontinued. Implemented a replacement search solution using Episerver Find and ensured continuity of core user functionality within an existing CMS-based system.

• Episerver
• Episerver Find
• C#
• CMS
• Search Migration
• Fullstack Development
• Maintenance Engineering

Built a structured relational database solution in MS Access to replace fragile spreadsheet-based workflows, improving data consistency and maintainability for internal accessibility-related processes.

• SQL
• VBA
• Microsoft Access
• Database Development
• Accessibility

Rebuilt a legacy iOS application for cruise ship information services. Migrated from Objective-C to Swift and replaced a WebView-based architecture with a native implementation. Worked under limited documentation and tight constraints, requiring reverse engineering of existing API behavior. Delivered a production-ready rewrite within project timelines.

• Swift
• iOS
• Objective-C Migration
• API Integration
• Legacy Systems
• Mobile Development

Developed backend services with .NET Core and frontend SPA functionality using Aurelia. Introduced a service-oriented architecture separating frontend and backend responsibilities.

• .NET Core
• Aurelia
• Architecture

WAM List

Platform for exploring and testing Web Audio Modules, combining frontend engineering with audio processing and developer tooling for browser-based audio systems.

• Built a discovery platform for Web Audio Modules
• Designed low-latency browser-based testing environments using Web Audio APIs
• Explored intersection of real-time audio and frontend systems

• Web Audio
• Audio Processing
• Music Technology
• Web Development

Foil Programming Language

Designed and implemented a custom programming language in Rust with a tokenization, parsing, and static HTML generation pipeline.

• Built tokenizer and parser in Rust
• Implemented static site generation pipeline
• Explored compiler design and language tooling

• Rust
• Programming Language
• Static Site Generation

Silverfish Android Launcher

Lightweight Android launcher optimized for low-performance devices and small screens.

• Designed a lightweight and memory-efficient Android UI for constrained devices

• Java
• Android SDK
• Mobile Development

Building Footprint Extraction

Tool for generating 3D city models from 2D map data using Unity.

• Implemented procedural generation logic
• Converted map data into 3D structures

• C#
• Unity
• 3D Graphics
• Procedural Generation