01Need
A monthly operation depends on spreadsheets and manual coordination.
Files, business rules, exceptions, and approvals need a single traceable workflow.
- Excel inputs
- Contract drift
- Audit trail
Carlo López Balbín · Frontend Engineer · Systems Engineer
I build frontend productsfor complex operations.
I turn financial and commercial processes into clear, reliable web applications—from data contracts and validation to responsive workflows and production releases.
Project frontend owner · React / Angular / TypeScript · Peru · English C1
Open to Frontend Engineer and Senior Frontend opportunities
My work connects business context, frontend architecture, and reliable delivery.
End-to-end frontend ownershipExplore each area
I define typed data contracts, clear module boundaries, and reusable components that keep the codebase understandable as the product grows.
16enterprise frontends
2,900+verified contributions
5+years building products
C1IELTS-certified English
From need to product / 04
The right product starts with the operation it must improve.
My process connects discovery, solution design, and delivery. Each decision is grounded in users, business rules, data, and the realities of production.
01 / UNDERSTAND
Define the real problem
I map the people involved, the current workflow, business rules, source data, and the exceptions that shape the solution.
02 / DESIGN
Shape the solution
I align data contracts, modules, validation, states, and interaction patterns around the most important operational flow.
03 / DELIVER
Put the product into operation
I deliver a usable product increment with responsive behavior, recovery paths, quality checks, and a clear route to production.
CARLMAC PETOS · visual language adapted for discovery, design, and delivery
03Product
A resilient operations console.
Validated imports, traceable states, focused exceptions, and a release-ready responsive workflow.
React · TypeScript · REST · ExcelJSSelected systems / 01—03
Selected work and responsibilities.
Three examples show the range of my work: enterprise frontend ownership, a complete product delivered independently, and full-stack foundations.
01
Systems / ownership / delivery
Enterprise Operations
At PHAREDATA, I work across sixteen frontends that support financial and commercial operations for clients in Chile.
View project details
Context
Bonuses, appeals, pre-invoicing, pricing, monthly close, bulk uploads, reports, and history screens combine dense business rules with evolving backend contracts.
My role
I am the main frontend owner or reference for Bonificaciones, Prefactura, Acciona, and TCT-TAE, and a key contributor to Cierre Mensual. I coordinate data contracts with backend teams, implement operational flows, and support fixes and releases across environments.
Delivered
- Operational tables, forms, modals, maintainers, and mobile adaptations
- Excel/PDF imports and exports with header, sheet, range, and business-rule validation
- Explicit loading, empty, conflict, and error states plus release and incident support
02
Product / auth / data
Academic Platform
I designed and developed a complete academic platform spanning public content, protected administration, participation, data, and deployment.
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Context
The public profile, publications, courses, files, registration, and nested discussion had to coexist without exposing private administration or turning the information architecture into a maze.
My role
I defined the responsive product structure, then implemented authentication, PostgreSQL data, row-level security, private storage, Excel/CSV onboarding, threaded replies, admin workflows, and a credible local demo mode.
Delivered
- A public academic identity with publications, courses, and a navigable timeline
- Role-aware administration and private file handling enforced at the data layer
- Bulk onboarding and three-level conversations shipped as one coherent product
03
Full stack / APIs / auth
MERN Foundations
Four end-to-end applications strengthened my foundations in product modeling, API design, authentication, validation, and data persistence.
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Context
Health routines, pet appointments, product orders, and movie reviews each forced different decisions about identity, validation, permissions, relationships, and failure handling.
My role
I modeled the domains and built both sides: React clients, Express APIs, MongoDB persistence, JWT and cookie authentication, routes, validation, and complete CRUD workflows.
Delivered
- Be Healthy — routines and nutrition
- Best Pet Help — pets and appointments
- Blaze Order App — products and orders
- MV PR — movies and reviews
Technology, with context / 05
Technology applied to real work.
Select a technology to see where I have used it. The examples distinguish production experience, shipped product work, and complementary practice.
Core
Product & data
Full stack
Delivery
Hands-on practice
Experience / 06
My path has moved steadily toward ownership.
- 01
PHAREDATA
Frontend Developer / Project Frontend Owner
I own and evolve React and Angular modules for Chilean financial and commercial operations: aligning backend contracts, implementing dense workflows, supporting releases, and becoming the frontend reference for multiple projects.
- 02
RIPE
Full Stack Developer
Designed and built a Laravel/PHP scientific publication repository from requirements and wireframes through deployment and documentation.
- 03
Factura Centro
Junior Full Stack Developer
Helped deliver a Laravel and MySQL operations application, owning its final development and deployment stage.
About / 07
A frontend engineer who connects product, code, and delivery.
I’m a Systems Engineer based in Peru. My strongest work brings together business rules, backend contracts, interface design, and delivery to create dependable tools for everyday operations.
I work closely with backend teams and stakeholders, ask precise questions, and pay attention to validation, responsive behavior, error recovery, and release quality. I also use Codex and ChatGPT to support research, debugging, documentation, and prototyping, with every result verified against the real code and runtime.
- Systems Engineer · National University of the Center of Peru
- Spanish native · English C1 (IELTS)
Contact / 08
Let’s build a product people can rely on.
I’m interested in Frontend Engineer and Senior Frontend opportunities where I can contribute to architecture, product flows, interface quality, and delivery.