Ezequías Aramburu

Tech Lead - Full Stack

• Stack: TypeScript, JavaScript, Java, React Native, Next.js, NestJS, PostgreSQL, DynamoDB, Aurora, AWS Cognito, API Gateway, Elastic Beanstalk, SQS, Vercel, Docker, Redis, Firebase, New Relic.
• Owns end-to-end delivery across a full production ecosystem: React Native app (50k+ MAU), Next.js dashboards, NestJS business services, AWS Lambda functions, and Java/Spring integrations with external providers.
• Cut AWS infrastructure costs by 38% by right-sizing instances and migrating fragmented legacy microservices into a unified core-api with autoscaling via API Gateway and Elastic Beanstalk.
• Defines technical direction for a team of ~5 engineers, conducts architectural reviews, and unblocks critical delivery paths across the stack.
• Bridges product and engineering, translating business requirements into scoped technical solutions while maintaining code quality and system performance.
• Embedded AI tooling (Claude, Cursor, CodeRabbit) into the team's workflow, reducing boilerplate overhead, catching bugs pre-production via automated code reviews, and accelerating technical spec and architecture documentation.

Sr. Software Engineer

• Stack: TypeScript, JavaScript, React.js, Next.js, Material UI, Express, Node.js, PostgreSQL, Sequelize, JWT, Firebase, Vercel, Nginx, Docker, Redis.
• Sole owner of the architectural design for a full platform migration to a modern stack (Next.js, Express, PostgreSQL, Redis) built from the ground up.
• Drove all technical decisions across the migration, data modelling, API design, auth, caching, and deployment pipeline, in close collaboration with PMs and designers.
• Mentored a team of 3 junior engineers through regular 1:1s and code reviews, reducing PR cycle time by ~30% over 6 months.
• Managed sprint planning and task organization, helping the team consistently meet delivery goals with <10% scope slippage per cycle.
• Leveraged Claude and Cursor to reduce boilerplate overhead, sharpen code reviews, and draft technical documentation faster.

Sr. Mobile Engineer

• Stack: TypeScript, React Native, Firebase, Jest, Bitrise, Sentry, App Center, Datadog, SonarQube, GitHub Actions.
• Delivered high-impact mobile features for a fintech app serving 1M+ users in a fast-paced agile environment.
• Achieved and maintained 95%+ unit test coverage on owned modules using Jest, reducing production bug rate by ~20%.
• Participated in daily code reviews across a team of ~8 engineers, improving consistency and catching critical issues pre-release.
• Integrated Sentry and Datadog monitoring, reducing mean time to detect (MTTD) production incidents by ~35%.

Full Stack Engineer

• Stack: JavaScript, React Native, React Query, Auth0, Redux, Jest, Firebase, Express, NestJS, Node.js, MongoDB, AWS EC2, Docker.
• Designed and implemented 5+ product features, integrating them into a complex B2B codebase with minimal disruption.
• Refactored legacy backend modules, reducing codebase complexity by ~20% and cutting average build time by 15%.
• Led code reviews for a 6-person team, establishing shared standards that improved codebase consistency.

Software Developer

• Stack: TypeScript, JavaScript, Express, Node.js, NestJS, Next.js, React Native, React.js, Angular, PostgreSQL, MongoDB, Redis, Firebase, AWS EC2, AWS Lambda, RabbitMQ, Docker.
• Led architectural redesign of 2 core applications, improving performance by ~40% and reducing time-to-deploy via Docker containerization.
• Implemented event-driven microservices architecture using RabbitMQ, decoupling 4 interdependent services and increasing system resilience.
• Scoped and delivered 10+ product requirements across concurrent projects in collaboration with stakeholders.

Software Developer

• Stack: JavaScript, TypeScript, Ruby, Ruby on Rails 4, Active Admin, Express, React Native, React.js, AngularJS, PostgreSQL, MongoDB, Redux, Firebase, Jest, Heroku, AWS EC2, Docker.
• Contributed to design and delivery of web and mobile features across 3+ client projects, from scoping to production.
• Conducted code reviews and mentored 2 new team members, accelerating onboarding and raising code quality standards.
• Maintained >99% production uptime by proactively identifying and resolving performance bottlenecks.
• Led end-to-end design and development of ERP systems, from requirements through deployment.
• Delivered cross-platform features (Ionic/Cordova) across iOS and Android, improving UX for ~500 end users.