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Pablo Pareja Tobes

@pabloparejatobes

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Senior Product Engineer specializing in frontend and full-stack development.

Spain

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What I'm looking for

I seek a product-focused engineering role where I can lead end-to-end development, shape product strategy, work with cross-functional teams, and build scalable data-driven visual experiences with strong technical ownership.

I am a Senior Product Engineer who blends product management, R&D, and engineering to deliver scalable, user-focused web applications. I work closely with cross-functional teams to design, develop, and launch products aligned with customer needs and business objectives.

With a strong front-end background, I specialize in React and TypeScript to build high-performance, elegant user experiences, and I contribute to back-end services using technologies such as Ruby on Rails and PostgreSQL. I have led and executed projects across domains including geospatial analytics, conservation, and climate data.

I have driven complex data visualization and graph-database integrations (Neo4j) for government-grade analytics platforms and major open-data tools, and I have experience in technical leadership, mentoring, and managing multi-disciplinary teams. My work includes building real-time platforms, AI-powered features, and research-driven bioinformatics systems.

I bring ownership, product-focused thinking, and a collaborative mindset to every role, emphasizing high-quality code, testing, performance optimization, and alignment with strategic goals. I seek roles where I can shape product strategy while delivering robust technical solutions.

Experience

Work history, roles, and key accomplishments

Current

Product Engineer

Current

Strategyzer

Feb 2023 - Present (2 years 10 months)

Contributed to development of a real-time innovation platform using React and TypeScript, built interactive data visualizations and AI-powered features, and supported back-end work in Ruby on Rails and PostgreSQL to improve performance and product outcomes.

React TypeScript Redux Playwright Jest Ruby on Rails PostgreSQL Data Visualization

Senior Front End Developer

GraphAware

Feb 2022 - Feb 2023 (1 year)

Built front-end features and complex graph visualizations for a government-grade data analytics platform using TypeScript, Three.js and WebGL, and implemented E2E testing with Cypress to improve reliability and performance.

TypeScript WebGL Cypress Neo4j Data Visualization Performance Optimization UI UX

Technical Lead | Full Stack Developer

Vizzuality

Jun 2019 - Feb 2022 (2 years 8 months)

Led multiple geospatial and conservation projects as tech lead and main developer, delivering React/Next.js applications, mapping solutions and analytics for clients like WRI and The Nature Conservancy across $50k–$250k engagements.

React TypeScript Next.js NodeJS Leaflet Mapbox Cypress Geospatial analysis Project Lead

Tech Lead | Senior Front End Developer

Vizzuality

Mar 2017 - Apr 2018 (1 year 1 month)

Primary developer of Resource Watch, designing and implementing a Neo4j knowledge graph and leading front-end development using React and NextJS to enable global geospatial data integration and visualization.

React React NextJS Neo4j D3.Js Leaflet JavaScript UI UX Knowledge Graphs

Senior Data Visualization Developer

Sandbag Climate Campaign

Feb 2016 - Feb 2017 (1 year)

Led development of an open-source graph database platform and an EU ETS interactive dashboard integrating multiple data sources, presented work to European policymakers to inform emissions analysis.

JavaScript Neo4j Data Visualization WordPress Open Source Dashboarding

Bioinformatics Developer & Fullstack Engineer

Era7 Bioinformatics

Aug 2007 - Jan 2016 (8 years 5 months)

Created and led development of web and cloud bioinformatics platforms including Bio4j, BG7 and Biographika, implementing scalable pipelines, databases and interactive visualizations for genomic analysis.

Java JavaScript AWS NoSQL Neo4j PostgreSQL Bioinformatics Data Visualization

Visiting Scholar

The Ohio State University

Mar 2012 - Jul 2012 (4 months)

Applied graph database paradigms to improve the GRASSIUS database and integrated Bio4j for large-scale experimental data analysis in the cloud, contributing to research published in Scientific Reports.