Alfonso Jimenez
Software Developer
Iłża, Mazowieckie
About
I bring a senior-level mindset, often guiding architecture decisions, mentoring teammates, and consistently focusing on scalable, maintainable code that balances technical excellence with business needs. I have a solid background in React, Redux, TypeScript, and modern web development practices. My professional journey is grounded and enriched by practical experience at various companies where I consistently adhere to SDLC best practices to deliver robust and effective web solutions.
Experience
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- Software Developer @ ProfekoPoland - HybridSummary:
- Developed and maintained financial modeling tools and municipal applications for Polish gminas using Vite, Ag-Grid, TypeScript, and React. Collaborated with stakeholders to build secure, accessible UI components integrated with C# APIs, aligning with government compliance standards.
Responsibilities:
- Developed and maintained internal tools and public-sector-facing applications for Polish gminas (municipalities).
- Integrated gov.pl login (national e-identification system) to enable secure authentication for public services.
- Built UIs for dynamic financial modeling based on variables like category and market rate.
- Collaborated with stakeholders to ensure alignment with local government processes.
- Ensured accessibility compliance (WCAG/a11y) and deployed solutions via IIS.
- Maintained high code quality with GitHub-based CI/CD workflows.
Achievements:
- Successfully delivered secure authentication via gov.pl login, ensuring verified access to municipal digital services.
- Built and deployed trusted applications for Polish municipalities, adhering to public sector technical and legal standards.
- Introduced a structured SDLC workflow, reducing deployment friction and last-minute fixes.
- Improved clarity and reusability of financial modeling interfaces across multiple municipal deployments.
- Built accessible interfaces meeting WCAG and a11y standards, expanding user inclusivity.
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- Software Developer @ HemmersbachWrocław, Poland - RemoteSummary:
- Developed and maintained internal apps handling 150k+ requests daily. Led UI/UX prototyping and mentored junior developers. Collaborated across teams and ensured scalable code and stakeholder satisfaction.
Responsibilities:
- Developed web apps with React, TypeScript, Redux Toolkit.
- Built interactive Figma prototypes and handled stakeholder communications.
- Tested, merged, and deployed production-ready features.
- Mentored junior developers through pair coding and reviews.
Achievements:
- Built and maintained scalable applications used by thousands of users daily.
- Improved system efficiency by ~30% by refactoring legacy workflows.
- Created 6 high-fidelity UI/UX prototypes to help validate business requirements.
- Helped onboard and mentor 3+ developers, improving team productivity and code quality.
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- Manual QA & Support Technician @ Pay.Enschede, Netherlands - HybridSummary:
- Supported plugin testing and client integrations. Built live demo setups using Docker and LAMP stack. Mentored by full-stack developers for code-related tasks.
Responsibilities:
- Manually tested 25+ webshop plugins.
- Supported clients with webhook/API integration.
- Configured Docker/LAMP for dev environments.
- Translated documentation and collaborated with full-stack devs.
Achievements:
- Set up and maintained 10+ custom Dockerized demo environments for executive presentations.
- Automated backend integration steps using internal SDK scripting, reducing support time.
- Translated technical documentation that improved cross-team clarity across international teams.
- Recognized by senior devs for quick adaptability and cross-functional collaboration.
Projects
Skills
Education
Concord University
Computer Information Systems
Concord University
Business Administration
Averett University
Computer science
Certificates
E-learning Compliance & Integrity
Netherlands Compliance Institute