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Lucas Braun
From Brazil 03:41 PM (GMT-03:00)
$20/hr or $36,000/yr
Active over a week ago
Member since Mar 2026

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Senior Backend Engineer

Back-end Engineer
Available for hire
Years of experience
6+ years
Experience level
Senior
Available for
Full-time, Part-time, Contract, Freelance
Download Resume / CV

I’m a backend developer focused on Python, building APIs and scalable systems. I have experience working with technologies like FastAPI, PostgreSQL, Docker, and cloud integrations, and I enjoy designing clean architectures and solving complex backend problems.

Throughout my career, I’ve worked on systems involving authentication, payments, integrations with third-party services, and data-heavy applications. I’m particularly interested in writing maintainable code, improving performance, and structuring projects with clear separation of concerns.

What makes me unique is that I combine strong technical curiosity with a product mindset, I like understanding the business problem behind the code. I’m currently looking for opportunities where I can contribute to impactful products while continuing to grow as a backend engineer.

Skills

SQL GraphQL AWS Lambda MongoDB PostgreSQL Python FastAPI

Languages

English Portuguese

Employment History

Senior Backend Developer at Hermes Tech Current 2022 - Now
Led end-to-end backend development for a CTRM (Commodity Trading Risk Management) platform supporting real commodity trades in a regulated environment. Architected the complete backend using Python, FastAPI, and PostgreSQL designing domain models, implementing complex business logic, and building scalable REST APIs. Led the migration from AWS RDS to Aurora, improving performance and reliability while reducing infrastructure costs. Integrated with multiple enterprise systems, developed background processing pipelines, and implemented secure API communication flows. Delivered a production-ready platform with high availability, strong data integrity, and enterprise-grade performance.
Backend Developer at Elint Tech 2021 - 2022
Built backend services for an e-commerce analytics platform. Key contributions: - Integrated VTEX API - Developed data ingestion pipelines with Python, FastAPI, and MongoDB - Built internal REST APIs for analytics dashboard consumption - Automated data sync using AWS Lambda Delivered reliable analytics infrastructure enabling real-time business intelligence for e-commerce operations.
Python Developer at Contus 2019 - 2021
Worked on a BI and analytics platform for accounting firms, building the complete data infrastructure from scratch. Key responsibilities: - Designed the full data layer architecture powering Power BI dashboards - Built ETL pipelines with Python and SQL to process accounting data - Developed data models and dimensional schemas for financial analytics - Created automated data ingestion workflows replacing manual processes - Implemented data quality checks improving reporting accuracy Enabled automated financial reporting and real-time operational insights for accounting firms, significantly reducing manual work and report generation time.

Education

Postgraduate in Software Engineering at Universidade de Passo Fundo 2019 - 2021
Bachelor of Electrical Engineering at Universidade de Passo Fundo 2014 - 2018
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