Arno is available for hire
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Verified Expert in Engineering
Software Developer
Quito, Pichincha, Ecuador
Toptal member since March 21, 2022
Bio
Arno is a full-stack developer with a strong focus on UX and reducing cognitive load. He specializes in working with a single codebase and mobile-first mindset, particularly in Ionic, Angular, and Capacitor, to ease distribution across all platforms with no extra cost. Arno prioritizes work to strike pain points first and maximize ROI, he thinks out of the box and looks for novel approaches, and he is detailed and structured and takes ownership of the challenges handed to him.
Portfolio
Meter Calibration Solutions LLC d/b/a MCS Petroleum
TypeScript, PostgreSQL, Supabase, Next.js, Vercel, Full-stack...
Fellesverktøy
Ionic, Angular, Capacitor, Firebase, Responsive Web Apps...
Kursfortegnelse AS
Angular, Ionic 5, Capacitor, Firebase, PHP, AI Integration, Responsive Web Apps...
Experience
- Node.js - 6 years
- Full-stack Development - 6 years
- Google Cloud Platform (GCP) - 6 years
- MySQL - 6 years
- Firebase - 4 years
- Angular - 4 years
- TypeScript - 4 years
- Stripe - 1 year
Preferred Environment
Linux Mint, Visual Studio Code (VS Code), Angular, Firebase, Node.js, JavaScript, TypeScript, React, Google Cloud Platform (GCP), PostgreSQL, Supabase
The most amazing...
...application I've developed immediately turned into a business that thrived since day zero and is still growing.
Work Experience
Full-Stack Developer for custom scheduling and compliance app / Oil services
2026 - PRESENT
Meter Calibration Solutions LLC d/b/a MCS Petroleum
- Transformed a desktop, SSR optimized app to become a responsive PWA with offline capabilities, saving on codebases and minimizing refactor work.
- Digitalized and automated forms filling of government and customer paper forms.
- Improved on the documentation quality by bringing in multimedia attachments to previous paper-only, numbers-only forms.
Technologies: TypeScript, PostgreSQL, Supabase, Next.js, Vercel, Full-stack, Full-stack Development, React, Mobile, Geolocation, Maps, Drizzle ORM, Prisma, Mapbox, Powersync, AI-assisted Development, AI-generated Code, Supabase Auth, Shadcn, Row-level Security (RLS), Testing
Full-stack Developer
2020 - PRESENT
Fellesverktøy
- Developed an app for construction companies to manage the tools they own and workers share.
- Internationalized the app in three languages to suit the Norwegian market.
- Integrated two sets of statistics to track customer-defined metrics and general usage and behavior.
- Created server-side functions for the app in Node.js, including an API enabling third-party communication.
- Wrote image processing and serving functions in PHP.
Technologies: Ionic, Angular, Capacitor, Firebase, Responsive Web Apps, Minimum Viable Product (MVP), Web Development, Responsive Layout, Stripe, Google Cloud Platform (GCP), HTML5, Full-stack Development, Software Architecture, Postman, ESLint, Apps, Typesense, AI Integration, Cursor AI, Claude Code, GitHub, Visual Studio Code (VS Code), TypeScript, APIs, Internationalization, Beta Testing, SendGrid, Cloud Run, Firebase Cloud Functions, Vercel, Technical Architecture, Front-end, Architecture, Observability, Artificial Intelligence (AI), Authentication, SaaS, Security, Cloud Firestore, User Experience (UX), Integrations, Observability Tools, Cloud, Monitoring, Payment APIs, Application Security, Web Security, OAuth 2, Clerk, chatling.ai, Cloud Engineering, Google Analytics, Google Analytics 4 (GA4), Landing Pages, Claude, Payment Processing, Startups, API Integration, Payments, Front-end Development, QR Codes, Mobile, Geolocation, Maps, Stripe API, OAuth, GitLab CI/CD, NoSQL, RESTFul APIs, AI Automation, REST APIs, Cloud Deployment, AI-assisted Development, AI-generated Code, Row-level Security (RLS), Testing
Full-stack Developer
2019 - PRESENT
Kursfortegnelse AS
- Developed an app dedicated to saving electricians and their customers time and money.
- Wrote the back end for managing orders and customers.
- Wrote the Google Vision AI integration for OCR of user-supplied images and documents, speeding up adoption a lot.
Technologies: Angular, Ionic 5, Capacitor, Firebase, PHP, AI Integration, Responsive Web Apps, Minimum Viable Product (MVP), Web Development, Responsive Layout, Google Cloud Platform (GCP), HTML5, Google Vision API, Full-stack Development, Software Architecture, Postman, ESLint, Apps, Typesense, Cursor AI, Claude Code, GitHub, Visual Studio Code (VS Code), TypeScript, Optical Character Recognition (OCR), APIs, Internationalization, Beta Testing, SendGrid, Cloud Run, Back-end, Neo4j, Observability, Artificial Intelligence (AI), Authentication, SaaS, Security, Cloud Firestore, User Experience (UX), Integrations, Observability Tools, Cloud, Monitoring, Application Security, Web Security, Cloud Engineering, Google Analytics, Google Analytics 4 (GA4), Claude, Payment Processing, Startups, API Integration, Front-end Development, QR Codes, Mobile, Stripe API, GitLab CI/CD, NoSQL, RESTFul APIs, AI Automation, REST APIs, Cloud Deployment, AI-assisted Development, AI-generated Code, Row-level Security (RLS), Testing
TECH Lead
2024 - 2026
Jehovah's Witnesses
- Led the TECH team of 35 volunteers supporting the Quito 2026 International Convention. The team directly supported about 650 core personnel by managing their access and training them to use software.
- Cybersecurity assessments and corrections, developed needed microsites and apps, administered access control for 11 secondary events, totaling 8,800 attendees during the event weeks.
- Coordinated translation into Spanish, English, Thai, and Japanese as well as live interpretation into English, and maintained organizational charts and contact lists.
Technologies: Technical Leadership, Software Development, Technical Training, Tailwind CSS, Cloud Engineering, Team Collaboration, Google Analytics, Google Analytics 4 (GA4), Claude, Front-end Development, GitLab CI/CD, AI Automation, REST APIs, Cloud Deployment, AI-assisted Development, AI-generated Code, Testing
Senior Full-stack Developer
2022 - 2026
MasterMind.com
- Migrated the user and company data (knowledge/learning platform) from AWS-backed to GCP-backed.
- Created and maintained several user-facing projects for onboarding, learning, payments, user content creation, and others (300,000+ users).
- Managed Google IAM permissions, service accounts, logging, and dashboards. Tuned scaling parameters for optimal cost/performance settings.
- Created and maintained internal payment management / advanced scheduling systems. Synchronized customer data from several Stripe accounts for the purpose.
- Built custom Hubspot CRM cards to streamline Sales and CS' access to internal key functions and customer information.
- Completely refactored and extended a custom affiliate portal for our partners: tracking, reporting, affiliate referrers and earnings reports.
- Performed operational tasks when needed, particularly watching and remediating scaling and operations before, during, and after product launches where the load would spike significantly.
Technologies: Node.js, MySQL, JavaScript, PHP, SQL, Express.js, jQuery, HubSpot, Next.js, Google Cloud Platform (GCP), Heroku, Amazon Web Services (AWS), Full-stack, OpenAI, Large Language Models (LLMs), Role-based Access Control (RBAC), Technical Leadership, Observability, Artificial Intelligence (AI), Authentication, SaaS, Security, Cloud Firestore, Agile, User Experience (UX), Integrations, Observability Tools, Cloud, Monitoring, Payment APIs, Application Security, Cloudflare, Web Security, Formik, Yup, Tailwind CSS, Vimeo API, Socket.IO, Salesforce, Avalara Tax API, DocuSign, Docker, Slack API, OAuth 2, Keycloak, FreeMarker, Chakra UI, Prisma, Zapier, Redis, Smarty, PandaDoc, OnceHub, n8n, Circle.so, Zod, Delphi.ai, chatling.ai, Cloud Engineering, Google Analytics, Google Analytics 4 (GA4), Affiliate Marketing, Claude, Payment Processing, Affiliate Tracking, Payment Gateways, API Integration, Financial Services, Payments, Front-end Development, Stripe API, OAuth, GitLab CI/CD, RESTFul APIs, Landing Pages, AI Automation, REST APIs, CRM, Cloud Deployment, AI-assisted Development, AI-generated Code, Shadcn, Stripe Connect, Testing
Full-stack Developer
2022 - 2024
A Marketing and Law Firm
- Streamlined templating of marketing landers to minimize time spent for the creative team whilst tightening up security and functionality. Outsourced all the code so that it could be applied efficiently to old and new lander pages.
- Set up a custom central management system for the marketing landers, including lander configuration, tracking, third-party plugin configuration, etc.
- Set up a central conversion tracking system so that you can adjust Hyros and Voluum conversions after the fact, when necessary.
- Sped up time to launch from weeks per lander to hour(s).
Technologies: PHP, JavaScript, HTML, CSS, jQuery, REST, APIs, Apache2, CentOS, Web Host Manager (WHM), Responsive Web Apps, Web Development, Responsive Layout, HTML5, Full-stack Development, Software Architecture, Postman, ESLint, cPanel, Cursor AI, Claude Code, GitHub, Visual Studio Code (VS Code), TypeScript, Beta Testing, Authentication, Security, User Experience (UX), Integrations, Observability Tools, Cloud, Monitoring, Clerk, HubSpot CRM, Cloud Engineering, Laravel, Vue 2, Landing Pages, Voluum, API Integration, GitLab CI/CD, RESTFul APIs, Web Marketing, REST APIs, Cloud Deployment, Testing
App QA Developer
2018 - 2020
Large Events Organization
- Implemented the internationalization initiatives for the event app, which supported 21 languages and language-specific fallback setups.
- Communicated with the app UI and content translators across the world. Set up an internal system to provide sufficient context and screenshots for translation.
- Tracked automated bug reports from Crashlytics into Jira, set priorities, and performed initial investigations to determine which developer to hand them to.
- Communicated with the closed group of beta testers and summarized the findings in new or existing bugs in Jira.
- Managed incoming bug reports from the public into Jira. The app had 300,000+ users before COVID-19 limited the events industry.
- Implemented the app design and wrote validation code in React Native.
- Executed login via a custom API, tapping into the customer's pre-existing authentication flow.
- Applied database synchronization to fully cache user data on-device, tapping into customers' pre-existing databases via a custom API.
Technologies: React Native, Firebase, APIs, Translation, Internationalization, QA Leadership, Beta Testing, Transcreation, Technical Translation, Responsive Layout, AI Integration, Azure, GitHub, TypeScript, SQL, SendGrid, Authentication, French, Testing
Security Technician
1997 - 2020
Telenor | Bravida | Sønnico | Oneco
- Installed new telecommunications and networking centrals, including PBX, switching, and related equipment.
- Troubleshot issues with networks, security, or instabilities.
- Installed and managed critical networking, security, and surveillance systems in banks, museums, prisons, hospitals, industrial plants, and office complexes.
- Managed smaller teams based on the Scandinavian method of team organization: auto-managing and taking the lead or collaborating as necessary.
- Served as the key account manager for larger clients: planned, scheduled, and organized cross-branch projects for or in collaboration with clients.
Technologies: Networks, IoT Security, Video Surveillance, Web Development, Responsive Layout, MongoDB, GitHub, APIs, Security
Experience
Fellesverktøy
https://fellesverktoy.noA B2B Ionic, Angular, and Capacitor app for web, Android, and iOS. I developed this from a single codebase, wrote a PWA back end in Ionic and Angular, internationalized the app with three languages in the UI, and set up notifications and emails.
Kursfortegnelse
https://kursfortegnelse.noA B2B Ionic, Angular, and Capacitor app for web, Android, and iOS. I created this app from a single codebase, implemented Google Vision AI for document processing, and created a PWA back end with orders and client management in Ionic and Angular.
Inca Spell Checker
https://github.com/arnotixe/qu_EC_spellQuichua (also known as Inca) is spoken in the Andes region of South America and has numerous dialects. In relation to an OCR scanning project, we needed a spellchecker, but none existed for this language. This package is built on the open source spellchecker Hunspell. We also had to extend hunspell itself to support some particularities of Quichua previously not supported by the base package (multiple levels of suffixes), triple consonants, and hyphenation rules.
POS and Invoicing System "Facturafast"
https://www.facturafast.comI developed a SaaS point of sale and invoicing system tailored for the Ecuadorian market, starting from the initial concept. I delivered an MVP that included payment integrations and authentication features, and created an informational website to support the product. I also ran an initial pilot project to gather user feedback, helping refine the system. Additionally, I set up the initial sales strategies and crafted user onboarding documentation.
Recommended Sites for Event Attendees
A lightweight information PWA with recommended sites (restaurants, points of interest, metro stations) for event attendees, written specifically for the 2026 Quito Jehovah's Witnesses International Convention. Search filters to find restaurants by dimensions such as available discounts, price range, cuisine, or dietary preferences. Available for only a couple of months, it was used by attendees to plan their vacation and find safe, nice experiences at a discount.
Education
1995 - 1999
Installer in Telecommunications
Kvadraturen College, Telenor - Kristiansand, Norway
Certifications
MAY 2026 - MAY 2029
Google Cloud Engineer
Google Cloud
MAY 2025 - MAY 2028
Digital Cloud Leader Certification
Google Cloud
FEBRUARY 2022 - PRESENT
SQL
HackerRank
FEBRUARY 2022 - PRESENT
Angular
HackerRank
FEBRUARY 2022 - PRESENT
JavaScript
HackerRank
DECEMBER 2017 - PRESENT
State Authorized Interpreter (Spanish)
IMDI Norway
Skills
Libraries/APIs
React, Stripe API, REST APIs, Node.js, Stripe, Socket.IO, Slack API, Stripe Connect, Google Vision API, Vue 2, Formik, Yup, Vimeo API, Avalara Tax API, jQuery, Zod
Tools
Claude Code, GitHub, Observability Tools, Claude, GitLab CI/CD, Capacitor, Postman, PandaDoc, Google Analytics, Shadcn, Keycloak, FreeMarker, Prisma, Zapier, n8n, SendGrid, Drizzle ORM
Languages
JavaScript, TypeScript, SQL, PHP, HTML, CSS, HTML5
Frameworks
Ionic, Smarty, Angular, React Native, Next.js, Tailwind CSS, OAuth 2, Express.js, Laravel
Paradigms
Role-based Access Control (RBAC), Testing, Responsive Layout, Agile, REST
Platforms
Linux Mint, Firebase, Visual Studio Code (VS Code), Clerk, Cloud Run, Mobile, HubSpot, cPanel, Google Cloud Platform (GCP), Vercel, Heroku, Salesforce, Docker, Azure, Apache2, CentOS, Amazon Web Services (AWS), Mapbox
Industry Expertise
Telecommunications
Storage
Cloud Firestore, NoSQL, Cloud Deployment, MySQL, Neo4j, MongoDB, PostgreSQL, Redis
Other
Networks, Video Surveillance, Spanish, Circle.so, Full-stack Development, Firebase Cloud Functions, Technical Architecture, Back-end, Front-end, Full-stack, Technical Leadership, Architecture, Artificial Intelligence (AI), Authentication, SaaS, Security, User Experience (UX), Integrations, Cloud, Monitoring, Payment APIs, Application Security, Cloudflare, Web Security, Affiliate Marketing, Landing Pages, Payment Processing, Affiliate Tracking, Payment Gateways, Startups, API Integration, Payments, Front-end Development, QR Codes, Geolocation, Maps, OAuth, RESTFul APIs, Row-level Security (RLS), IoT Security, Optical Character Recognition (OCR), APIs, Ionic 5, Responsive Web Apps, Minimum Viable Product (MVP), Web Development, ESLint, Chakra UI, OnceHub, Delphi.ai, Cursor AI, Software Architecture, OpenAI, Large Language Models (LLMs), Observability, Google Analytics 4 (GA4), Voluum, Financial Services, Web Marketing, AI Automation, CRM, Supabase, AI-assisted Development, AI-generated Code, Supabase Auth, Spanish-English Translation, Translation, Internationalization, QA Leadership, Beta Testing, DocuSign, Apps, Typesense, AI Integration, Transcreation, Technical Translation, SRI invoicing, Web Host Manager (WHM), Cloud Computing Consultancy, HubSpot CRM, Hunspell, PWA, Invoicing, POS, chatling.ai, Cloud Engineering, Google Tag Manager, Team Collaboration, Software Development, Technical Training, French, WhatsApp, Powersync
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