I build web systems, ship them to production and keep them running.
Systems Engineer (UMSS, Bolivia) working remotely for clients in Germany. My work sits where development meets operations: I build Angular applications, customize WordPress platforms with PHP and JavaScript, and take care of deployments, SSL, caching and incident response on Linux servers. I use AI coding agents as part of a controlled, evidence-based workflow.
- 🏢 Currently: Web Systems Engineer at pirAMide Informatik GmbH (Hamburg · remote, 2024 – present)
- 🧪 Research: author of Debugging for Instances (DFI), an evidence-based method for AI-assisted debugging (DOI)
- 🌎 Cochabamba, Bolivia · UTC-4 · Spanish (native), English (B1)
I have worked with Angular 17, 19 and 22 across company and personal projects.
| Architecture | Standalone components · zoneless change detection · domain-oriented folder structure · route-level lazy loading · route guards |
| Rendering | Server-side rendering and prerendering with @angular/ssr |
| Design systems | Shared UI libraries built with ng-packagr · SCSS design tokens · responsive layouts |
| Quality | TypeScript strict mode · Vitest · Prettier · accessibility targets (WCAG 2.2 AA) · Core Web Vitals targets |
| Data | RxJS services · REST APIs · Supabase (PostgreSQL + Auth) |
| UI libraries | PrimeNG · PrimeFlex · Bootstrap |
| i18n | ngx-translate — multilingual interfaces and language selectors |
AI proposes. Evidence decides. The engineer controls. — core principle of DFI
- AI coding agents in real repositories, guided by repository-level instructions (
AGENTS.md,CLAUDE.md) and written AI guidelines that define what an agent may and may not change. - Angular CLI MCP server connected to the agent, so it works with the project's real tooling instead of guessing.
- Evidence-based debugging with AI — hypotheses are tested against what the system actually does before any fix is applied. I formalized this approach as DFI.
- Human review stays in charge: small changes, feature branches and verification after every change.
Source code for this work is private because it belongs to my employer and its clients. Each project below links to a showcase repository with scope, architecture and my role — no source code. More write-ups: engineering-case-studies.
| Area | What I do | Stack |
|---|---|---|
| Angular migration | Migrating a corporate website to a modern Angular application, preserving public URLs and visual baseline while improving maintainability, performance, accessibility and SEO | Angular 22 · SSR · TypeScript · SCSS · Vitest |
| Modern website redesign | Redesign work: design system with tokens, responsive layouts, documented quality standards | Angular · TypeScript · SCSS |
| Business Manager platform | Product website, shared UI library and CRM interface concept for the company's business-management platform | Angular · SSR · ng-packagr |
| WordPress development & operations | Development, maintenance and support of 15+ client websites and web apps across staging and production | WordPress · WooCommerce · BuddyBoss · LearnDash · PHP · JS |
| Web operations | Staging → production deployments, backups, SSL, caching, permissions and production incident resolution | Debian · Plesk · Nginx · PHP-FPM |
Source code remains in the official repositories. Everything below links to public, merged pull requests — no code is redistributed here.
Piramide-Informatik/iws-manager-webapp · 22 merged pull requests · March – June 2025
Enterprise management web application. I built CRUD screens, data tables and navigation for the frontend.
Stack: Angular 19 · TypeScript · PrimeNG · Reactive Forms · ngx-translate · PrimeFlex
What I worked on: 10 master-data screens (users, roles, absence types, holidays, funding programs, IWS staff, commissions, teams, countries, costs) · work contracts, invoices and subcontracts modules · data tables with sorting, pagination, column filters and multiselect filters · form validation · multilingual UI and language selector · grouped master-data navigation menu
| PR | Contribution |
|---|---|
| #16 | Work contracts table — PrimeNG table with sorting, global filter and dialogs |
| #26 | Translation support and language selector (ngx-translate) |
| #47 | Invoices table and improved language selection panel |
| #55 | Subcontracting details — Reactive Forms with validation and related tables |
| #95 | Grouped master-data navigation menu |
| #101 | User management UI |
| #139 | Funding programs UI |
| #155 | IWS staff UI |
| #179 | Countries, costs, teams and commissions screens |
| #396 | Scrolling fix applied across all data tables |
Team project of the Department of Informatics and Systems, Universidad Mayor de San Simón · November 2024 – May 2025
Frontend · pagina-web-social-frontend · 8 merged PRs · Angular 17 · TypeScript · Bootstrap
| PR | Contribution |
|---|---|
| #21 | Commenting on posts |
| #33 | Emoji reactions on comments |
| #50 | Replies UX — descending order, auto-focus on reply, show more / show less, consistent date format |
| #53 | Replying to comments, including nested replies |
| #55 | Reactions component and refactor of comments and replies |
Backend · pagina-web-social-backend · 6 merged PRs · Java 17 · Spring Boot 3 · Spring Data JPA
| PR | Contribution |
|---|---|
| #23 | Search posts by text — controller, service, repository query, DTO and mapper |
| #60 | Paginated post listing in batches of 10 (Pageable) |
| #62 | Posts ordered by date with pagination |
| #66 | Nested replies — self-referencing JPA relationship, JPQL query for top-level replies and reply-tree building |
| #68 | Emoji reactions on replies — controller, service, repository, DTOs and mappers |
| Project | Description | Stack | Links |
|---|---|---|---|
| Debugging for Instances (DFI) | Methodological framework for AI-assisted, evidence-based software diagnosis — falsifiable hypotheses, controlled instrumentation and verified fixes | Methodology · JSON Schema · JS | Paper (Zenodo) |
| Engineering Case Studies | Public-safe write-ups of professional work: Angular migration, design systems, B2B product frontend and a production incident | Angular · SSR · PHP-FPM | — |
| Personal Portfolio | Bilingual portfolio hand-built with a WebGL aurora background, a 3D globe on canvas and animated SVG diagrams | HTML · CSS · Vanilla JS · WebGL | Live |
| Automotive Workshop System | Management system for an automotive repair shop: customers, vehicles, intake inspection, work orders, parts requests and printable documents | Angular 19 · TypeScript · Supabase · PostgreSQL · Netlify | Live |
Frontend
Backend & data
WordPress ecosystem
WooCommerce Memberships & Subscriptions · BuddyBoss · LearnDash · Modern Events Calendar · WP Job Manager · custom themes, plugins, shortcodes, forms, roles & permissions
Operations
Staging → production · DNS · SSL · backups · caching · PHP-FPM / OPcache · file permissions · post-deployment QA
AI & methods
Prompt engineering · root cause analysis · Scrum · OKR · Design Thinking
IT foundations: 10+ years of hardware, software and network support — Windows/Linux, LAN/Wi-Fi, routers, peripherals, data recovery, malware removal and end-user support.
Working knowledge: React · Node.js · Laravel · Docker · Python · Power BI
- Evidence before fixes. I debug by forming hypotheses and testing them against what the system actually does.
- Production is part of the job. Backups before changes, staging before production, verification after every deployment.
- Small, reviewable changes. Feature branches, pull requests and descriptive commits.
- Documentation first. Architecture, standards and decisions are written down before implementation starts.
Open to remote roles · omar-argenes.netlify.app