Daniel Werle Arenhart

Software Engineer · Brazil

arenhart.daniel@gmail.com · linkedin.com/in/darenhart · github.com/darenhart

Full Stack Software Engineer with 14 years of experience building and scaling products across startups and global tech companies. I’ve led system architecture, shipped production systems used by millions, and worked closely with cross-functional teams. Comfortable owning projects end-to-end—from design to monitoring. Experienced in system design, cloud environments, microservices, high-reliability payment workflows, observability and automated end-to-end tests.

TECHNICAL SKILLS

WORK EXPERIENCE

Senior Software Engineer at Building Swell

Aug/2023 - Jul/2025 · United States · Remote

• Developed a modern system for prefab shops, serving key players in the building industry.
• Collaborated closely with project leads to design and deliver features, wearing multiple hats.
• Used data insights and dogfooding to refine features and boost reliability.
• Skills: TypeScript · React · Node.js · Next.js · TailwindCSS · Docker · Postgres · AWS · Sentry

Senior Software Engineer at Quizlet

Feb/2021 - Aug/2022 · United States · Remote

• Launched a new product for 60M+ students worldwide through cross-functional collaboration.
• Handled front-end, back-end, data mirroring, monolith decomposition, and cloud infrastructure.
• Conducted A/B testing, monitored metrics, and provided insights for continuous improvement.
• Mentored new engineers, helping them grow and adapt to a fast-paced environment.
• Skills: TypeScript · React · Python · PHP · Kotlin · TDD · Next.js · Datadog · AWS · Google Cloud

Senior Software Engineer at Phi - Fintech (4all hub)

Jun/2019 - Dec/2020 · Brazil · On-site

• Contributed to a scalable microservices architecture using REST and pub/sub system.

• Maintained micro-frontend architecture with React for modular and scalable development.

• Built a robust SaaS for processing high-volume payment transactions securely and reliably.

• Collaborated closely with partners, ensuring successful integration and goal alignment.

• Skills: TypeScript · React · Redux · Node.js · NestJS · Java · RabbitMQ · MongoDB · AWS

CTO & Co-Founder at Eagle Care

Feb/2018 - Jun/2019 · Brazil  · On-site

• Co-founded the startup, driving its technical vision, architecture, and initial development.
• Led a 4-member team, actively coordinating work, roadmap, and delivery.
• Worked with stakeholders to identify, prioritize, and ship product improvements.
• Achieved rapid growth, serving over 40k users.
• Skills: TypeScript · Angular · PHP · Laravel · SQL · Firebase

Full Stack Developer (Freelance) at Eagle Tecnologia E Design

Jun/2012 - Apr/2018 · Brazil  · Remote

• Built an email and SMS marketing platform from scratch.
• Developed Hurbanize, a PWA with drawing tools, featured at the Tomie Ohtake Institute.
• Delivered corporate websites and Progressive Web Apps (PWAs) for various clients.
• Skills: TypeScript · Angular · PHP · Firebase · Wordpress · Laravel · CodeIgniter · SQL

Full Stack Developer at e-Core

Jun/2012 - Oct/2017 · Brazil · Remote

• Worked with global teams, coordinating and communicating with diverse stakeholders.
• Created E2E test automation suites for US clients like Axispoint, Warner, and AGCO.
• Maintained HealthPlan Services (US insurance firm) portals for billing and enrollment.
• Skills: PHP · MySQL · HTML5 · CSS3 · JavaScript · jQuery · Selenium · SOAP · Node.js · E2E

Full Stack Developer at Univates University - Feb/2011 - Jun/2012 · Brazil

EDUCATION

Bachelor in Computer Engineering - Univates University (Incomplete) - Jan/2009 - Dez/2012

Computer Technician - Escola Estadual de Educação Profissional Estrela - Jan/2009 - Dez/2011

LANGUAGES

English - C1 Advanced

Portuguese - Native