Logo
Alberto – Node.js, Typescript, JavaScript, experts in Lemon.io

Alberto

From Spain (UTC+2)flag

Full-stack Web Developer|Senior
Mobile Developer|Senior
Lemon.io stats
5
projects done
3477
hours worked
1
offers now 🔥

Alberto – Node.js, Typescript, JavaScript

Senior Back-end Developer with Node.js superpower. Alberto can also boast of good knowledge of JavaScript, TypeScript, and the ability to solve complex problems. Furthermore, his code is clean and easy to read. Additionally, Alberto has experience in working on large projects, and this fact significantly contributes to his working with startups. Considering Alberto's outstanding communication skills and solid technical background, with his assistance and engagement, your project cannot but be a success.

8 years of commercial experience in
Business intelligence
Consulting services
E-commerce
Electronics
Fintech
Healthcare
Job and career services
Management
Marketing
Mental healthcare
Retail
Social media
Supply chain
Telecommunications
Travel
B2B
B2C
Marketplace
Subscription
AI software
Communication tools
Mobile apps
SaaS
Video streaming software
Main technologies
Node.js
8 years
Typescript
5 years
JavaScript
5 years
Next.js
8 years
React
8 years
React Native
1 year
Additional skills
Express.js
PostgreSQL
Redis
Kubernetes
Nest.js
Terraform
Twilio API
GCP
BigQuery
Grafana
Docker
MongoDB
MongooseODM
gRPC
RabbitMQ
Stripe API
GraphQL
Firebase
AWS
DevOps
Material UI
Tailwind CSS
Prisma
Cursor
Direct hire
Possible
Ready to get matched with vetted developers fast?
Let’s get started today!

Experience Highlights

Lead Front-end Developer
Dec 2023 - Aug 20251 year 8 months
Project Overview

was brought in to lead the complete rewrite of the customer-facing web application—bootstrapping the entire engineering platform from zero with no designs, no tickets, and only high-level technical direction.

Responsibilities:

• Bootstrapped the entire engineering platform from scratch — repository, CI/CD pipelines (GitHub Actions), coding standards, service architecture, and credential management — giving the team a production-ready foundation from day one. • Owned the B2B app monorepo and modular service architecture: shared libraries, developer tooling, and standards that enabled multiple squads to ship independently. • Led daily code reviews, pair programming sessions, and architecture discussions — acting as the quality gatekeeper for all shipped code while mentoring engineers across levels. • Managed end-to-end observability with Grafana, Datadog, and Sentry, proactively catching production issues before they reached customers. • Interviewed and evaluated engineering candidates, directly shaping the team's growth and technical bar.

Project Tech stack:
React
Next.js
Apollo GraphQL
Tailwind CSS
GitLab
AWS
Grafana
Sentry
Datadog
Tech Lead Full Stack Engineer
Jul 2023 - Dec 20241 year 5 months
Project Overview

A holistic Software-as-a-Service solutions that create transparency and sustainable growth along the entire value chain, fulfill legal ESG requirements, and automate manual processes.

Responsibilities:
  • Reviewed PRs across the team, providing constructive feedback on code quality, test coverage, and architectural consistency, fostering a collaborative development environment and demonstrating strong accountability.
  • Collaborated with the CTO on architecture decisions, deployment strategy, and a major refactor of the legacy testing infrastructure, driving continuous improvement and enhancing performance through query tuning.
  • Wrote and maintained unit, integration, and E2E test suites following TDD practices, catching regressions before they reached production and ensuring high product quality standards.
  • Debugged and resolved issues across frontend and backend services, from flaky test failures to production incidents, demonstrating strong troubleshooting and problem-solving capabilities.
  • Cut CI/CD pipeline time by ~68% (from 1h20m to 25m) by parallelizing E2E and integration test runs, caching authentication flows, and isolating test contexts to eliminate flaky tests, enhancing efficiency and application deployment.
  • Mentored engineers across levels on the new testing and pipeline architecture, improving build reliability and development speed across teams, fostering talent development, and improving communication skills.
Project Tech stack:
Node.js
Typescript
Playwright
npm
Azure DevOps
OOP
SOLID
Jest
Senior Full-stack Developer
Jul 2022 - May 202310 months
Project Overview

An AI-enhanced video production platform helping organizations create branded, professional-quality videos through a guided mobile app and cloud-based automated editing. Alberto integrated AI capabilities that automated transcript extraction, content generation, and social video creation for enterprise clients including Novartis.

Responsibilities:

• Integrated AI capabilities into the production platform: automated transcript extraction (Whisper), chapter generation, marketing copy creation (GPT-4), and short-form social video generation — using LangChain for orchestration. • Built full-stack features across multiple SaaS products from MVP to production, shipping iterative milestones in tight two-week Agile sprints directly to founders and stakeholders. • Worked closely with designers and product managers to refine requirements, prototype solutions, and iterate on UX — bridging product vision and technical execution. • Set up CI/CD pipelines, shared component libraries, and design systems for new projects from scratch. • Triaged and resolved bugs across client projects, from UI regressions to API integration failures, maintaining SLAs for production systems.

Project Tech stack:
Next.js
shadcn
Tailwind CSS
PostgreSQL
GraphQL
LangChain
OpenAI API
Claude LLM
AI agent development
AI
React
Node.js
Nest.js
Senior Full-stack Developer
Jul 2020 - Jul 20222 years
Project Overview

A technology partner that helps startups, scaleups, and enterprises build software solutions by deploying empowered product teams. Some of their clients are Nasdaq Private Market, PlexTrac, Crave, Plotify, Karus, etc.

Responsibilities:
  • Developed the 2FA feature to validate customer identities, integrating with Sumsub API services;
  • Owned database integration end-to-end: entity design, migrations, and query performance tuning across PostgreSQL and Cloud Spanner, ensuring robust database schemas and efficient database management.
  • Worked in Scrum with two-week sprints, participating in all phases of the SDLC: requirements gathering, design, implementation, QA, deployment, and production support.
Project Tech stack:
React
Next.js
Prisma
Apollo GraphQL
GraphQL
tRPC
Nest.js
Cypress
Typescript
React Native
Senior Full-stack Developer
Oct 2017 - Oct 20203 years
Project Overview

A multinational chain of department stores owned by a multinational company. It is the largest South American department store and a member of the International Association of department stores (since 2006).

Responsibilities:
  • Managed design, development, support, and maintenance of REST APIs services in Node.js;
  • Led in kick-off meetings to gather business requirements;
  • Was involved in all phases of development, including Engineering/Business Requirements, User stories, Development, QA, Deployment, and Support;
  • Managed Git version control, configuration management, maintaining code quality, backlog prioritization, and decisions on technology for new requirements;
  • Worked in an agile development environment using scrum methodologies;
  • Modified and refactored internal node.js libraries to migrate logging to Datadog;
  • Implemented integrations with Google Cloud Services such as Big Query, Cloud Spanner, Cloud SQL, Logging, Compute Engine, IAM policies, etc.;
  • Set up new Projects/Services, including CI/CD integrations with GCP, Private Registry, Private variables, and Management of Service Secrets;
  • Was involved in Database integration, Entities Design, Migrations, and Query Performance tuning;
  • Developed Service integrations with Other Software, including Redis, PostgreSQL, Datadog Agent, Docker, and Grafana;
  • Created documentation regarding service issues (Causes and Solutions implemented). Swagger tools for API documentation;
  • Developed technical flows visually, starting from user stories;
  • Developed a robust microservice architecture;
  • Implemented service mesh, stable interfaces, metrics, and contracts for APIs;
  • Took a lead role in architecture design;
  • Applied TDD using Jest for unit and integration tests, as well as other technologies for E2E tests.
Project Tech stack:
Typescript
PostgreSQL
JavaScript
Node.js
Kubernetes
Knex.js
Fastify.js
Express.js
Nest.js
Koa.js
Apollo GraphQL
Jest
Terraform
Jira
Scrum
Twilio API
Agile
Cloudflare
GCP
Cloud Architecture
Grafana
Redis
BigQuery
SQL
NoSQL
Next.js
React
Redux
Docker
ESLint
Unit testing
Integration Testing
e2e testing
Regression testing
Senior Back-end Developer
Oct 2017 - Oct 20203 years
Project Overview

A digital solution that seeks to simplify the collection and payment experience for customers and businesses, seeking to bring everything together in one place.

Responsibilities:
  • Implemented the PSE payment method;
  • Did review and monitoring of different payment services, soap, logs, postman, etc.;
  • Developed different improvements and automation of services for the client area (application for downloading accounting files from GCloud, and Node.js).
Project Tech stack:
GCP Compute Engine
GCP
BigQuery
DevOps
Node.js
Knex.js
MySQL
Typescript
JavaScript
React
Full-stack Developer
Oct 2016 - Oct 20171 year
Project Overview

A company that provides software design and delivery and tools and consulting services. The company is closely associated with the movement for agile software development. Its business includes Digital Product Development Services, Digital Experience, and Distributed Agile software development.

Responsibilities:
  • Managed technical design, development, support, and maintenance of REST APIs services in Node.js;
  • performed as a single point of contact for resolving project issues and mentoring team members;
  • was involved in analyzing and implementing system design;
  • configured Observability and Monitoring tools;
  • managed configuration of CI/CD pipelines;
  • designed and developed a data redaction feature to control the flow of obfuscated data to the pre-live and production environments;
  • took part in analyzing and implementing user stories;
  • handled Git version control, configuration management, maintaining code quality, backlog prioritization, sizing user stories, and decisions on technology for new requirements.
Project Tech stack:
React
JavaScript
Typescript
MongoDB
MongooseODM
gRPC
RabbitMQ
Node.js
Next.js
TypeORM
API Testing
ESLint
Integration Testing
Unit testing
Redis
Redux
Redux Thunk
Redux Saga
OAuth
Twilio API
Stripe API
REST API
Grafana
GraphQL
Apollo Client
Apollo GraphQL
Apollo Server
Koa.js
Nest.js
Fastify.js
Express.js
MySQL
Docker
Kubernetes
Cloud Computing
Firebase

Education

2022
Software Development
B.Sc. Software Development

Languages

English
Advanced

Hire Alberto or someone with similar qualifications in days
All developers are ready for interview and are are just waiting for your requestdream dev illustration
Copyright © 2026 lemon.io. All rights reserved.