João Marcos Carneiro Maciel
Verified Expert in Engineering
Engineering Manager and Developer
Belo Horizonte - State of Minas Gerais, Brazil
Toptal member since November 8, 2024
João has over 13 years of tech experience and has been managing teams for seven years, leading teams of more than 20 engineers. He has worked with small startups and big organizations to build high-performing applications from scratch, achieving thousands of users and tripling the customer base. He's also led the development of AI infrastructure to empower the company and implement compliance certifications. João is well-versed in back-end development, AI, trading bots, and security.
Portfolio
Experience
- Web Development - 10 years
- JavaScript - 9 years
- Python - 8 years
- Agile Project Management - 7 years
- Node.js - 7 years
- Team Leadership - 7 years
- Data Engineering - 6 years
- Artificial Intelligence (AI) - 2 years
Availability
Preferred Environment
Node.js, Python 3, JavaScript, Web Development, Mobile Development, Desktop App Development, Artificial Intelligence (AI), Data Engineering, Team Leadership, React
The most amazing...
...achievement I've accomplished is forming an engineering department from the ground up, managing multiple teams, and leading +20 engineers.
Work Experience
Engineering Manager
Toptal
- Led a team of 15 engineers and data scientists, handling all major AI and data science projects across the company.
- Built a scalable AI infrastructure to empower other teams.
- Participated in "High Potential Leaders," a unique program for top-notch leaders at Toptal.
- Implemented compliance certifications successfully, including the payment card industry data security standard and the Service Organization Control 2 (SOC 2) compliance framework.
- Developed and rolled out company-wide security initiatives, reporting to executive managers.
- Played a key role in building the vulnerability management process from the ground up.
- Created and led a globally distributed team from scratch. I handled hiring, process definition, and product development cycle management.
- Developed a desktop application from the ground up, exceeding OKRs by 20% and achieving hundreds of active users.
- Implemented efficient processes that resulted in one of the company's fastest development cycles with the highest quality level.
Engineering Manager
Passei Direto
- Managed multiple squads (+20 people), including producers and billing specialists.
- Led the creation of a new department from the ground up through strategic hiring.
- Directed multiple teams composed of full-stack engineers, QA specialists, DevOps engineers, and data scientists, achieving a 3x reduction in cycle time within a few months.
- Handled a new product's development and successful delivery.
Tech Lead
SmarttBot
- Managed the data team, overseeing the data and analytics infrastructure development to support the company's growth.
- Contributed to tripling the customer base by enhancing data-driven decision-making.
- Led the Brazilian trading bots championship, the company's most important project, which involved almost the entire organization and got featured in major Brazilian financial media for its impact.
- Developed Python-based automated trading bots, driving new SaaS client acquisitions.
Experience
Artificial Intelligence Infrastructure
Skills
Libraries/APIs
Node.js, React, Vue
Languages
Python 3, JavaScript, Python
Paradigms
Agile Project Management, Agile, Desktop App Development, Mobile Development
Other
Web Development, Data Engineering, Team Leadership, Artificial Intelligence (AI), Back-end, Data Analytics, Trading Bots, Data Science, Machine Learning, Security
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