Full Stack Developer with experience building web applications, mobile apps, internal tools, and e-commerce platforms. I work across the entire development lifecycle, from architecture and implementation to deployment and ongoing improvements, with a focus on scalable, maintainable solutions.…

Jakub Popiolek

Full Stack Developer with experience building web applications, mobile apps, internal tools, and e-commerce platforms. I work across the entire development lifecycle, from architecture and implementation to deployment and ongoing improvements, with a focus on scalable, maintainable solutions.…

Available to hire

Full Stack Developer with experience building web applications, mobile apps, internal tools, and e-commerce platforms. I work across the entire development lifecycle, from architecture and implementation to deployment and ongoing improvements, with a focus on scalable, maintainable solutions.

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Skills

Experience Level

AngularJS
Expert
CSS
Expert
Github
Expert
HTML5
Expert
Java
Expert
JavaScript
Expert
PostgreSQL
Expert
Shopify
Expert
SQL
Expert
TypeScript
Expert
.NET
Expert
C#
Expert
React JS
Expert
React Native
Intermediate
AWS
Beginner
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Language

English
Fluent
Polish
Fluent

Work Experience

Software Developer at Informed Solutions
June 1, 2021 - July 1, 2022
Integrated an external file-store API using AWS Lambda to automate document ingestion into S3, including categorisation and data-cleanup logic, with deployments managed via GitHub Actions. Contributed to the design and integration of a machine-learning document classification workflow, defining data structures and input pipelines. Developed WCAG-compliant frontend features for a government-facing web application using Angular (v18) and TypeScript, working in a cross-functional Scrum team to deliver accessible public-sector services.
Full Stack Software Developer at Informed Solutions
October 8, 2024 - October 10, 2025
Worked across the full stack using Angular (v19), TypeScript, and NgRx on the frontend, and Java (Spring Boot) on the backend with PostgreSQL and Flyway migrations. Developed and maintained features for a secure government application, meeting strict testing standards including 80%+ unit test coverage across frontend and backend codebases. Contributed to CI/CD pipelines using Jenkins and supported planning for a migration to GitHub Actions, collaborating closely with clients and cross- functional delivery teams to meet compliance and functional requirements.
Full Stack Software Engineer at Poler
October 10, 2025 - Present
Architected and built an end-to-end private-assets investment platform using React Native, C# (.NET 8), Go, CMS (Strapi) and PostgreSQL, owning the entire system design and implementation. Designed a security-first architecture, centralising authentication and authorisation to reduce attack surface and simplify compliance. Implemented a high-reliability backend with resiliency pipelines (Polly), transactional consistency, and code-first database migrations, including safe rollback strategies for partial failures. Built and maintained engineering workflows using GitHub Actions.
Full Stack Software Engineer at Poler
October 10, 2025 - Present
Architected and built an end-to-end private-assets investment platform using React Native, C# (.NET 8), Go, CMS (Strapi) and PostgreSQL, owning the entire system design and implementation. Designed a security-first architecture, centralising authentication and authorisation to reduce attack surface and simplify compliance. Implemented a high-reliability backend with resiliency pipelines (Polly), transactional consistency, and code-first database migrations, including safe rollback strategies for partial failures. Built and maintained engineering workflows using GitHub Actions.

Education

Master of Mathematics (MMat) in Mathematics and Computer Science at University of York
September 1, 2019 - August 1, 2024

Qualifications

Add your qualifications or awards here.

Industry Experience

Financial Services, Government
    Government Digital Services & Internal Tools

    Development of public-facing services and internal applications used within the UK government.

    The focus was on creating secure, reliable, and accessible systems capable of supporting large user bases while improving operational efficiency.

    Highlights

    • Public-facing services
    • Internal business tools
    • Accessibility-focused development
    • Secure system design
    • Large-scale user support
    • Ongoing platform improvements
    Fractional Real Estate Investment Platform

    A fintech platform designed to enable pooled investment in real estate and alternative assets through a secure and scalable digital experience.

    The platform includes investor onboarding, wallet functionality, transaction management, dividend distribution, and marketplace capabilities.

    Highlights

    • Investor onboarding workflows
    • Digital wallets
    • Transaction processing
    • Dividend distribution
    • Marketplace functionality
    • Scalable backend architecture
    Espresso Editorial

    A custom headless Shopify storefront built around coffee subscriptions, allowing customers to subscribe to weekly, bi-weekly, and monthly deliveries through a seamless shopping experience.

    Built with a fully custom frontend and Shopify’s commerce capabilities, the platform allows products, subscription plans, text, and imagery to be managed directly through Shopify without requiring code changes.

    Highlights

    • Custom headless storefront
    • Flexible subscription plans
    • Shopify-managed content
    • Responsive design
    • Performance-focused architecture
    • Automated deployment workflow
    Modern Sole Store

    A custom e-commerce storefront integrated with Shopify, designed to provide a modern shopping experience beyond standard Shopify themes.

    The project focuses on delivering a fast, responsive, and highly customizable storefront while leveraging Shopify’s backend for product management and checkout.

    Highlights

    • Custom storefront experience
    • Shopify Storefront API integration
    • Shopping cart and checkout flow
    • Responsive design
    • Optimized frontend performance
    • GraphQL-powered product data

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