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Leonor G.LG

Leonor G.

Supermalter

🥇Senior Frontend Full-Stack Angular Vue React PHP

€310/day
54 projects
Barcelona, ES
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Leonor

Senior Full-Stack Developer with over 10 years of experience building and evolving complex systems in production.

I have worked for extended periods within stable teams in enterprise environments, participating in the development, maintenance, and continuous improvement of critical platforms with high user and transaction volume.

My focus goes beyond developing features: I specialize in understanding complex systems, identifying weaknesses, and applying progressive improvements that increase stability, performance, and scalability without compromising production.

I can handle complete projects from start to finish autonomously: from technical design and architecture to development, deployment, and go-live.

I work at an expert level in frontend, backend, and mobile, with a focus on:
- Production stability
- Continuous architecture improvement
- Performance optimization
- Advanced debugging and critical incident resolution

I have participated in over 50 projects in production:
- Mobile applications with +1M downloads
- Platforms with over 1M transactions
- High-criticality B2B and B2C enterprise systems
- Complete migrations and modernization of legacy systems

💡 I can contribute:
- Long-term system evolution (not temporary solutions)
- Performance improvement in complex applications
- Stabilization of environments with recurring incidents
- Progressive refactoring without business impact
- Effective integration within technical teams

⚙️ Stack:
Angular, React, Vue, Node.js, NestJS, PHP, Java, Flutter, Azure, Docker, CI/CD
Specialty: performance tuning, profiling, trace analysis, and system stabilization.

I work results-oriented: clear diagnosis, solid execution, and measurable improvements from the start.

Available for complete projects and long-term collaborations
  • English

    Conversational

  • Spanish

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • Indra
    Senior Software Developer
    May 2022 - Today (4 years and 1 month)
    • • Deep performance optimization in Angular applications and hybrid ecosystems. Identification and resolution of critical bottlenecks, improvements in load times, rendering, and memory efficiency.
    • • Refactoring and stabilization of a highly chaotic legacy architecture, designing patterns, rules, and conventions that now support the product.
    • • Design and development of internal Angular libraries "from scratch", including reusable components, shared modules, and productivity tools for development teams.
    • • Standardization of the technical ecosystem, defining architecture, guidelines, technical documentation, and workflows to maintain long-term consistency.
    • • Implementation and maintenance of CI/CD pipelines with Jenkins, automating build, test, and secure deployment processes.
    • • Advanced trace analysis and debugging, drastically reducing production errors and accelerating the resolution of critical incidents.
    • • Technical support to other teams, assisting with code reviews, architectural decisions, internal training, and complex case resolution.
    • • Management and maintenance of Git repositories, branches, conventions, semantic versioning, and release control.
  • Owldev Solutions
    Team Leader & Architect
    January 2021 - Today (5 years and 5 months)
    I combine architectural vision, full-stack capability, and technical management, ensuring quality, consistency, and measurable results in every delivery.
    • • Complete architectural direction of frontend, backend, and mobile solutions, defining standards, patterns, technical guidelines, and quality criteria.
    • • Senior Full-Stack Development with mastery of multiple frameworks (Angular, React, Vue, Node.js, Flutter), adapting to the specific needs of each project.
    • • Transversal technical leadership, guiding developers, reviewing code, contributing best practices, unblocking complex problems, and ensuring coherent technical evolution.
    • • Comprehensive project lifecycle management: requirements gathering, functional analysis, estimations, documentation, planning, architecture, and execution supervision.
    • • Direct and professional communication with clients, ensuring transparency, technical clarity, follow-up, and alignment with business objectives.
    • • Definition and creation of specialized documentation: architectural diagrams, specifications, impact analyses, technical reports, work plans, and acceptance criteria.
    • • Supervision and maintenance of CI/CD pipelines, version control, branching strategies, and efficiency-oriented automation.
    • • Guarantee of long-term quality and stability, managing evolutionary and corrective maintenance, optimizing performance, refactoring, and continuously improving delivered solutions.
    • • High rate of successfully delivered projects, maintaining stable technical relationships with clients and ensuring the operational continuity of their systems.
  • Invisible Bits
    Senior Frontend Software Engineer
    February 2019 - February 2022 (3 years)
    Barcelona, Spain
    I work closely with UI/UX Designers and the CTO to create pleasant user experiences and usable interfaces, using technologies such as Django, JQuery, ES6, TypeScript, Redux (ngrx), Angular +, Material-U, Webpack, d3.js.

Reviews

5.0

Out of 44 ratings

JP

Juan Pablo

Andremur Distribuciones S.L.

Reviewed on 3/22/2023

Everything great with Leonor! Excellent communication! Whatever one has in mind, Leonor will bring it to life.
JoanJ

Joan

Joan Pomata

Reviewed on 8/16/2021

Very competent, as always when I work with her.

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Education

  • Superior in Computer Science
    Institute of Technology of Venezuela
    2013
    Estudio superior en informatica

Certifications

Skill set

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