Alberto
From Spain (UTC+2)
Lemon.io stats
5
projects done3477
hours worked1
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
Main technologies
Additional skills
Direct hire
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Let’s get started today!Experience Highlights
Lead Front-end Developer
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.
• 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.
Tech Lead Full Stack Engineer
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.
- 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.
Senior Full-stack Developer
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.
• 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.
Senior Full-stack Developer
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.
- 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.
Senior Full-stack Developer
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).
- 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.
Senior Back-end Developer
A digital solution that seeks to simplify the collection and payment experience for customers and businesses, seeking to bring everything together in one place.
- 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).
Full-stack Developer
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.
- 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.