Daniel Werle Arenhart

Senior Software Engineer · Brazil

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

Full Stack Software Engineer with 14 years of experience, including 8+ years with US-based companies. I have a background in the full software lifecycle — from co-founding a startup as CTO (scaling to 40k users) to launching production systems used by millions. I am comfortable owning projects end-to-end: from design and implementation to testing, deployment, and observability. I have a proven track record in microservices and payment systems where reliability and performance are key.

TECHNICAL SKILLS

WORK EXPERIENCE

Senior Software Engineer at Building Swell

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

• Architected a ERP/SaaS platform for the prefab industry, serving enterprise-tier clients.
• Owned the full CI/CD lifecycle, including automated testing and observability.
• 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 · Django · PHP · TDD · Next.js · Datadog · AWS · GCP

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

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

• Contributed to a scalable microservices architecture using REST and event-driven architecture.

• 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 · Node.js · NestJS · Java · RabbitMQ · MongoDB · AWS · Kubernetes

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 · United States · Remote

• Maintained HealthPlan Services (US insurance firm) portals for billing and enrollment.
• Created E2E test automation suites for US clients like Axispoint, Warner, and AGCO.
• Skills: PHP · MySQL · JavaScript · Node.js · jQuery · Selenium · SOAP · 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