CAP · 01
Product engineering
I turn business workflows and user needs into small, measurable and technically sustainable increments.
PRODUCT ENGINEERING · LONDON
Available for selected opportunities
Carlos RNúñez López
Senior Full-Stack Product Engineer
I design, build and operate digital products end to end: from architecture, identity and APIs to web experiences that solve real problems.
- Focus
- Product · APIs · Automation
- Experience
- 18+ years
- Based in
- London, United Kingdom
18+18+ years delivering software
Engineering with product perspective
- Experience:
- 18+ years delivering software
- Work:
- United KingdomSpainUnited StatesMexicoCuba
- Tooling:
- Tooling that automates tasks and saves time across software development.
01 · PROFILE
I turn technical complexity into sustainable product.
Working principles
SOLID · KISS · DRY · Secure by default · Sustainable evolution
I am a Senior Full-Stack Product Engineer with more than 18 years designing, integrating, deploying and operating web platforms for users and organisations across five international markets.
I stay close to the business problem while remaining deeply hands-on. I translate complex requirements into secure, maintainable capabilities, support teams from discovery to production and make decisions grounded in SOLID, KISS and DRY.
My experience combines architecture, implementation, code review, mentoring, documentation and production support. Before optimising a solution, I make sure it is understandable, observable and ready to evolve.
- 18+
- years in software engineering
- 10+
- years with Vue, Laravel and Node.js
- 75%
- less repetitive effort through reusable tooling
- 5
- international markets
02 · CAPABILITIES
Architecture, product and delivery in one conversation.
I do not separate technical strategy from user experience. These are the capabilities I connect to move an idea into production.
CAP · 02
API architecture
I design REST contracts, domain models, integrations and modular boundaries that can change without breaking consumers.
CAP · 03
Identity and security
I implement OAuth2/OIDC, JWT, RBAC, 2FA, multi-tenancy and KYC/KYB flows with secure defaults.
CAP · 04
Automation and tooling
I build generators, SDKs, pipelines and internal tools that reduce repetitive work and standardise delivery.
CAP · 05
Technical leadership
I facilitate decisions, review architecture and code, document rationale and help knowledge remain within the team.
CAP · 06
Production reliability
I investigate application, data, access and infrastructure incidents and turn operational learning into durable improvements.
03 · TECHNOLOGY
A broad stack, organised by the work it solves.
Technologies used across real products, integrations, data platforms and production environments.
Languages
04- TypeScript
- JavaScript
- PHP
- Java
Frontend and product
08- Vue.js
- Nuxt
- React
- Pinia
- Vite
- HTML5
- CSS3
- Sass
Backend and APIs
06- Node.js
- NestJS
- Laravel
- REST APIs
- OpenAPI
- TypeORM
Identity and integration
06- OAuth2 / OIDC
- JWT
- RBAC
- 2FA
- n8n
- Webhooks
Data
07- PostgreSQL
- MySQL
- MariaDB
- MongoDB
- SQL Server
- SQLite
- Firebase
Cloud and delivery
08- Docker
- Linux
- Git
- GitHub
- Azure DevOps
- CI/CD
- Nginx
- Apache
Icons represent hands-on experience, not arbitrary proficiency percentages.
04 · EXPERIENCE
18+ years connecting people, systems and product.
A career combining product engineering, research data platforms, fintech, technical leadership and university teaching.
Selected experience
- 01
Nov 2024 — Present
London, United Kingdom
Software Engineer — Research Data Systems
City St George's, University of London
Supporting and administering research data platforms and database-backed applications across the university.
I investigate application, data, infrastructure, access and integration incidents, coordinate service recovery and turn operational requirements into reliable solutions and documentation.
- REDCap
- SQL
- MySQL / MariaDB
- Linux
- Production support
- 02
May 2020 — Nov 2024
Remote
Senior Full-Stack Engineer / Technical Lead
KwikVet · Pet Care On-Demand
Product design and delivery for an on-demand pet care platform.
I built web and administrative capabilities, APIs for appointments, clients, pets, medical records, invoicing and inventory, plus JWT authentication, permissions and reusable integrations.
- TypeScript
- Vue.js
- Node.js
- NestJS
- PostgreSQL
- MongoDB
- Firebase
- 03
Oct 2021 — Jul 2023
Remote · Mexico
Backend Developer
VixiPay / FirstOTC Fintech Platform
Evolving a modular fintech API for B2B/B2C onboarding, accounts, transactions, KYC/KYB and digital assets.
I implemented OAuth2, RBAC, 2FA, webhooks and financial workflows for reconciliation, cancellations, refunds and disputes across a platform with 191 endpoints and 173 tables or views.
- Laravel
- MySQL
- OAuth2
- RBAC
- 2FA
- OpenAPI
- KYC / KYB
- 04
Apr 2021 — Apr 2023
Havana, Cuba · Hybrid
Project Team Lead / Senior Developer
Asistur Seguros / Codes
Leading the team delivering insurance platforms with Vue.js, Laravel and PostgreSQL.
I designed the policy system architecture, web and mobile flows and payment integration while coordinating discovery, technical proposals and delivery.
- Vue.js
- Laravel
- PostgreSQL
- REST APIs
- Payments
- 05
Sep 2007 — Jul 2024
Havana, Cuba
Professor / Technology Specialist
Technological University of Havana (CUJAE)
Teaching Software Engineering, Object-Oriented Programming, Databases and Web Development.
I mentored theses and university projects, created technical learning material and supported developers from foundations through architecture and delivery.
- Software Engineering
- OOP
- Databases
- Mentoring
Additional experience
Nov 2021 — Feb 2022
Azure DevOps Module Developer
Inycom
Full-stack modules and delivery capabilities integrated with Azure DevOps CI/CD pipelines.
Sep 2019 — Nov 2020
Senior Software Engineer
The Cloud Group
Vue.js and Laravel solutions for international clients, deployed across shared servers and VPS environments.
Mar 2019 — Mar 2020
Project Manager / Senior Developer
Rezglo
Architecture and development of a React, Laravel and MongoDB platform while leading a four-person delivery team.
Jun 2013 — Jul 2017
Software Analyst & Architect
ClimbX · Excelencias Travel · Havana Club
Architecture for travel, production and enterprise systems, including infrastructure administration and multiple database engines.
05 · PROJECTS
Products best understood by seeing them work.
A selection of real systems told through the problem, the interface and the decisions that turn them into everyday tools.
SIVUSIVUAn Urban Vegetation Information System that brings green inventory, mapping, urban heat, risk and IoT sensors into one operational tool.
Eros ExperiencesEros ExperiencesAn adult-experience discovery and booking platform for Buenos Aires, combining a filterable catalogue, detailed listings, a venue directory and discreet assistance.
KwikVetKwikVetAn on-demand veterinary-care platform connecting telemedicine, house calls and clinical operations through a digital experience available around the clock.
Trio Valdés RoyaleTrio Valdés RoyaleAn audiovisual presentation for Trio Valdés Royale connecting Afro-Cuban legacy, contemporary vision and five performances recorded at Cuba's Fine Arts Palace.Use the diagonal arrow to reveal the project details.
06 · OPEN SOURCE
Public repositories and verifiable activity.
A curated selection of original repositories loaded from GitHub's public API. Forks and non-representative projects are excluded to keep the technical focus clear.
github.com/charlietynDocumented
rest-generic-class
Laravel package with reusable foundations for REST CRUD APIs, dynamic filters, relations, hierarchies and bulk operations.
PHP 6 0Updated Aug 2026
Documented
openapi-generator
Laravel generator for OpenAPI 3.0.3 specifications and Postman- and Insomnia-compatible collections.
PHP 3 0Updated Jul 2026
laravel-federated-auth
Configurable federated-authentication bridge for Google, Facebook, Keycloak and generic OIDC providers.
PHP 1 0Updated Aug 2026
tech-context-graph
Local technology knowledge graphs for understanding code and context in AI-assisted development.
TypeScript 5 0Updated Aug 2026
laravel-agent-protocol
Laravel SDK for exposing API metadata in a structured format consumable by AI agents.
PHP 2 0Updated Jul 2026
laravel-app-context
Public repository focused on managing Laravel application context.
PHP 0 0Updated Aug 2026
nest-rest-generic-typeorm
Reusable foundation for building REST APIs with NestJS and TypeORM.
TypeScript 1 0Updated Jun 2026
nest-rest-generic-sequelize
Reusable foundation for building REST APIs with NestJS and Sequelize.
TypeScript 0 0Updated Jun 2026
laravel-caldav
Experimental CalDAV integration for Laravel applications.
PHP 0 0Updated Mar 2026
07 · EDUCATION & LANGUAGES
Academic foundations and international communication.
Education
BEng (Hons) Software Engineering
Technological University of Havana (CUJAE)
2001–2007
17 years of university teaching and technical mentoring
Experience explaining architecture, databases, programming and software design to students, teams and stakeholders.
Languages
- SpanishNative
- EnglishB2 Upper-Intermediate (IELTS)
08 · CONTACT
Let’s build the next product capability.
Available to discuss product engineering, API architecture, data platforms, identity, automation and technical leadership.
charlietyn@gmail.com
Phone
+44 7411 063456
carlos-rafael-nunez-lopez
GitHub
@charlietyn
Location
London, United Kingdom