Stanislav Pintjuk

Spearheaded the architectural revitalization of a codebase, decomposing tightly coupled 'spaghetti' components into a maintainable structure. Engineered frontend registration and credit card onboarding flows using Stripe, including 3D Secure (3DS) handling as part of the payment verification process during a critical migration from invoice-based billing to card-based subscriptions. Took ownership of key architectural decisions in a non-technical organizational context. Led the rollout of the new billing and onboarding system to production, handling real-world edge cases and production issues during and after release while stabilizing the system under live customer usage. Resulted in over 900 customers successfully purchasing parking permits within the first week of launch.

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

Worked on large-scale e-commerce product pages, focusing on performance, accessibility, and scalable frontend architecture. Improved Core Web Vitals (LCP/FCP), moving pages from the Lighthouse 'Needs improvement' range into stable 'Good' performance through server-side rendering strategies and asset optimization. Proactively identified and resolved accessibility issues, ensuring WCAG compliance. Contributed to architectural improvements of reusable frontend components used across multiple teams.

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

Developed the customer-facing website for Tele2's telecom and broadband operator brand 'Penny', offering marketing pages, onboarding flows, and self-service account management. Built the application in React and TypeScript with Redux for state management, including a custom server-side rendering solution using Express. Integrated the platform with external CMS APIs for content delivery and Adyen payment services to support credit card-based payment flows. Worked on complex transactional flows where payment onboarding introduced multiple edge cases and required careful handling of failure states and user communication. The platform was successfully launched and used in production by customers before being later discontinued due to a strategic decision by Tele2.

• 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 for ICA Banken as a React-based frontend. Built complex form UI with custom field types and implemented cross-step validation logic to ensure consistency and correctness throughout the application process. Worked within an established design system and visual language, translating UX designs into production-ready components while handling numerous edge cases across navigation and state transitions in the flow. The application was successfully launched and used in production by customers applying for loans.

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

Worked across multiple high-impact initiatives within Nordax Bank's internal banking and customer systems. Initially led a platform-wide transformation by migrating SVN into Git repositories and designing automated build and release pipelines using PowerShell and Octopus Deploy. Reduced release cycles from approximately one week to a few hours through CI/CD and deployment automation. Contributed to the development of a backend integration layer for a German loan application flow, building APIs used by an external banking partner to handle application processing and finalization workflows. Later developed a React-based internal customer support tool used by call center staff to access customer loan data and perform administrative actions such as issuing payment adjustments and account changes. Implemented telephony integration, including call queue handling and pre-loading customer context while agents were in queue to improve response efficiency. Maintained multiple internal company tools in parallel.

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

Developed a new public-facing municipal website from scratch for Kristinehamns Kommun, serving as the primary digital communication channel for citizens. Built the solution using Episerver CMS, designing and implementing content templates, page structures, and logic-driven components in both frontend and backend. Integrated Episerver Find to enable site-wide search functionality. Worked in a small two-person team in close collaboration with a UX designer. Successfully delivered and launched a full replacement of the previous municipal website, which remains in production today.

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

Maintained and developed the public-facing website for Stockholms Hamnar (Ports of Stockholm). Took responsibility for migrating the website's global search functionality after Google discontinued the underlying search API. Implemented a replacement based on Episerver Find to ensure continued site-wide search capability for public users. Worked within an existing CMS-based system, focusing on backend integration and frontend search functionality to maintain continuity of core website features.

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

Engineered a structured relational database solution in MS Access to replace fragile spreadsheet workflows, securing and streamlining accessibility project data.

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

Rebuilt and modernized a legacy iOS application used for real-time cruise ship information in Stockholm and Nynäshamn. Migrated the codebase from Objective-C to Swift and replaced a WebView-based implementation with a native application architecture and updated UI. Worked under significant constraints including poor documentation and limited handover from a previous consultancy, requiring reverse-engineering of existing API behavior. Delivered the rewrite while simultaneously learning Swift and iOS development practices, successfully shipping the application within the project timeline. The application remains in production use today.

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

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

• .NET Core
• Aurelia
• Architecture

WAM List

Centralized catalog and testing platform for Web Audio Modules, combining web development with music technology to make browser-based audio processing modules easier to discover and test.

• Built a web platform around the Web Audio ecosystem
• Designed low-latency browser-based testing environments leveraging Web Audio APIs
• Combined frontend engineering with audio technology

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

Foil Programming Language

Designed and implemented a custom programming language in Rust, including tokenization, parsing, and static HTML generation pipeline, exploring compiler design and static site architecture.

• Engineered a custom tokenization and parsing pipeline in Rust to evaluate static HTML generation
• Implemented static site generation concepts

• Rust
• Programming Language
• Static Site Generation

Silverfish Android Launcher

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

• Designed a memory-efficient Android UI optimized for constrained devices

• Java
• Android SDK
• Mobile Development

Building Footprint Extraction

Tool generating 3D city models from 2D maps using Unity.

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

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