Available for new projects

Backend
that holds up the real
world.

Backend developer focused on Django REST and PostgreSQL. I also build Vue.js and Next.js frontends when the project calls for it.

View work Read /uses
Professional portrait of Leonardo Costa, a man with dark skin, short hair, and a thin beard with a mustache. He wears dark-rimmed glasses and a black t-shirt, posing with a serious expression against a neutral gray background and soft studio lighting.
portrait · 2026rio de janeiro / br
~/leonardo · whoami.sh
$whoamileonardo · backend engineer
$stackdjango · drf · postgres · celery · vue
$statusaccepting freelance
years shipping
3+
projects in prod
3
response time
< 24h
languages
PT/EN
02·about

I've been a developer for over 3 years, focused on Django REST and PostgreSQL. Most of my time goes to the backend — APIs, integrations, async queues — and I also have hands-on experience with Vue.js on the frontend.

03·stack

Stack.

  • Django REST Framework
  • Django
  • Docker
  • Next.js
  • Python
  • Nuxt.js
  • Celery
  • Bootstrap
05·experience

Where I've been shipping.

  1. Dec 2025 Present· 5 months

    Full Stack DeveloperConnext Energia & Consultoriacurrent

    Belém - PA

    Building an AI-powered invoice audit system in partnership with Connext. Responsible for the product end to end — backend, frontend, infrastructure and integrations. Activities: - Backend in Django…

  2. Oct 2025 Apr 2026· 6 months

    Software DeveloperPortí Digital

    Belém - PA

    Fullstack developer on a receivables anticipation system for healthcare professionals, integrating with payment platforms and internal tools. Activities: - APIs with Django REST and frontends with N…

  3. Jul 2025 Mar 2026· 8 months

    Software DeveloperFebraCIS

    Belém

    Senior backend developer on an AI-powered CRM for managing leads, sales, courses and WhatsApp communication. The system ran in real time, classified leads automatically and served several of the group…

06·education

Academic background.

  1. Mar 2026 Present· 2 months

    Specialization in Cloud Computing ProjectsDescomplica Faculdade Digitalcurrent

    Specialization in Cloud Computing projects: distributed systems architecture, infrastructure as code, managed services, scalability, cost and observability in the cloud. The next layer of my backend w…

  2. Feb 2025 Mar 2026· 1 year and 1 month

    Postgraduate Degree in Software EngineeringDescomplica Faculdade Digital

    Postgrad focused on applied software engineering: architecture, design patterns, automated testing, agile methods (Scrum/Kanban), DevOps, requirements engineering and project management. It's helped m…

  3. Feb 2024 Jan 2025· 11 months

    MBA in Information SecurityDescomplica Faculdade Digital

    MBA focused on protecting data, systems and infrastructure: risk management, vulnerability analysis, security policies, compliance (LGPD, ISO 27001), cryptography, network security and secure developm…

07·testimonials

What people say.

I had the opportunity to work with Leonardo at Resolve Energia Solar during a period of accelerated company growth. With many challenges, processes to be defined, and multiple projects underway, it was essential to have proactive and committed people. Leo consistently proved himself to be a highly collaborative professional, actively participating in problem-solving and encouraging continuous improvement. His approach is user-centered, always seeking the best possible experience, while demonstrating excellent teamwork. In summary, Leonardo is a consistent, creative, and strategic professional. His communication is assertive and clear, directly contributing to the delivery of high-quality products and the growth of both the team and the company.
Foto de Max Oliveira
Max Oliveira
Tech Lead · Resolve Energia Solar
I'm pleased to strongly recommend Leonardo. During the time he was my student, I was able to closely observe his commitment, dedication, and high technical level. Leonardo consistently demonstrated remarkable expertise in Django development, applying programming best practices and efficient architectures in his projects. Additionally, his advanced mastery of Git and GitHub showed a strong code versioning capability, collaborating in an organized and strategic manner in team projects. Another highlight was his strong sense of leadership. He not only delivered quality solutions but also helped colleagues, fostering a collaborative and productive environment. His interpersonal skills are excellent, standing out for clear and objective communication, which reinforces his ability to work efficiently in teams. For all these reasons, I believe Leonardo will be a great asset to any technology team. His combination of technical and soft skills makes him a distinguished professional, ready for market challenges.
Foto de Samara Souza
Samara Souza
Professor · University of Amazon
Great developer, especially when working in a team, super dedicated to his work. I worked with Leonardo during our internship and since then he has shown himself to be a very easy person to work with and highly competent. He has a quick learning ability that makes it easier for him to deal with future problems and tasks in his work. An excellent professional, always willing to improve in his career.
Foto de Kevin Sarges
Kevin Sarges
Systems Analyst · Ser Educacional Group
I had the privilege of being Leonardo's professor, and throughout that period, he always stood out as a committed, dedicated, and highly competent student. His passion for learning and constant pursuit of technical improvement is remarkable. I also had the opportunity to see him in action on a practical project, where he demonstrated not only deep technical knowledge but also exceptional interpersonal skills. Leonardo is an excellent programmer with impressive command of frameworks like Django and a strong focus on web development. His ability to solve complex problems efficiently and creatively, combined with technical rigor, makes him a complete professional. He works with agile methodologies, knows development best practices, and follows a test-driven approach, ensuring his solutions are robust and scalable. Beyond his technical skills, Leonardo possesses a set of soft skills that make him a true asset to any team. He is collaborative, always willing to share knowledge and help colleagues, whether offering technical support or acting as a mentor. His communication skills and empathy help him lead naturally, being an excellent facilitator during technical discussions or conflict resolution. I recommend Leonardo without reservation for any position in software development. He will certainly be a valuable addition to any team or project.
Foto de Márcia Pantoja
Márcia Pantoja
Professor · University of Amazon
I want to recommend Leonardo as an excellent professional and, more than that, as an incredible person to work with. He is very competent, always committed to what he does, and has a way of dealing with challenges that inspires confidence. What I admire most about him is how he's always willing to help and share what he knows, which makes all the difference in the team's daily routine. Beyond his technical skills, Leonardo has a very positive and collaborative attitude, which makes the work environment lighter and more productive. I'm sure he can add great value to any project or team lucky enough to have him.
Foto de Thiago Menezes
Thiago Menezes
Software Developer · Resolve Energia Solar
It is with great satisfaction that I recommend Leonardo Costa. I had the opportunity to work alongside him for a year at Resolve Energia Solar, where he worked as a Junior Software Engineer. What impressed me about Leonardo from the beginning was his dedication and passion for web development. Even as an early-career professional, he already demonstrated solid knowledge in Django and an enormous desire to learn and grow. I remember how dedicated he was to developing the payment request module. He not only focused on delivering functional code but also on creating a solution that was intuitive and easy to use for clients. His commitment to seeking best practices and ensuring the quality of his work was evident. Beyond his technical skills, Leonardo is an incredible colleague. Always willing to collaborate, share his knowledge, and help the team, with a smile on his face and a positive attitude that was contagious to everyone. I'm certain that Leonardo has a bright future ahead and will be an asset to any team lucky enough to have him. I recommend him without hesitation!
Foto de Henrique Marques
Henrique Marques
Software Engineer · Resolve Energia Solar
08·contact

Got a backend that needs building?

If you want to talk about a project, a role, or just trade notes on Django, send a message.