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João OliveiraJO
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João Oliveira

@joooliveira2

Senior Software Engineer at Reddit, building performant web interfaces and contributing to AI-powered products.

Portugal
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At Reddit, I engineered a high-performance web client for millions of users, where accessibility, rendering cost, and reliability at scale were everyday constraints. I built reusable Web Components and data-heavy interfaces, and optimized rendering to support responsive experiences across devices.

I also contributed to AI-powered product functionality and worked on content discoverability and technical SEO for AI-driven systems and agents. My work included accessibility improvements and stronger test coverage.

At Leneo, I led frontend engineering for a fintech platform used by banks and financial institutions. I owned critical financial workflows end to end, from architecture and state modelling through API contracts and production delivery.

At Polkastarter, I led frontend architecture and delivery for a cross-chain Web3 platform, including wallet and smart-contract integrations across multiple chains. Earlier, at Preqin Solutions, I built data-driven fintech interfaces, financial forms, and visualizations for large datasets.

Experience

Work history, roles, and key accomplishments

LE

Lead Software Engineer

Leneo

Jan 2021 - Dec 2023 (2 years 11 months)

Led frontend engineering for a complex fintech platform used by banks and financial institutions, turning dense leasing rules and data-heavy workflows into scalable product experiences. Owned critical financial workflows end-to-end and mentored engineers.

Polkastarter logoPO

Lead Software Engineer

Polkastarter

Jan 2020 - Dec 2021 (1 year 11 months)

Led frontend architecture and delivery for a cross-chain Web3 platform supporting token pools and decentralized fundraising across multiple blockchains. Implemented wallet and smart-contract integrations and mentored engineers in a distributed team.

Preqin Solutions logoPS

Front-End Engineer

Preqin Solutions

Jan 2017 - Dec 2020 (3 years 11 months)

Built enterprise fintech software used by major financial institutions to manage private-capital and hedge-fund portfolios. Refactored a large frontend codebase into modular, scalable foundations and built complex data-driven interfaces and visualizations.

Education

Degrees, certifications, and relevant coursework

João hasn't added their education

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