Gustavo C.

Gustavo C.

Backend Developer

Top performer 9/10
Portugal
Trusted member since 2024
7 years of experience

One of his proudest achievements is developing the Rust Arweave SDK, a foundational component of a larger infrastructure project. This SDK has been adopted by thousands of developers worldwide, demonstrating Gustavo's ability to deliver scalable, high-impact solutions.

With a blend of technical expertise and a user-focused approach, Gustavo ensures the delivery of well-rounded, high-quality software. His thoughtful decision-making, especially when considering user experience, makes him an invaluable contributor to any project.

Main expertise

RustRust4 years
API7 years
REST APIREST API6 years
JavaScriptJavaScript5 years
7+

Experience9

Solana Lead Engineer

Cryptocurrency Quantitative Traders
Cryptocurrency and Blockchain
Jan 2025 · 1y 9m
  • Built a unified REST API that mirrored Bybit V5 endpoints, enabling seamless integration with existing trading infrastructure
  • Developed a modular exchange abstraction layer using asynchronous Python (FastAPI and SQLAlchemy) to support multiple DeFi protocols on Solana
  • Created Python bindings with PyO3 to wrap Solana Rust instructions, enabling low-latency on-chain DeFi order execution
  • Containerized the application with Docker and implemented CI/CD pipelines using GitHub Actions for automated testing and deployment
  • Enabled access to more than 2,000 Meteora, Orca, and Jupiter liquidity pools through a CEX-style API, bridging centralized and decentralized trading workflows
PythonPython
RustRust

Lead Engineer

Tari & Monero Mining Pool
Cryptocurrency and Blockchain
Apr 2024 - Oct 2024 · 6m
  • Developed software for workload distribution across RandomX- and SHA3-based cryptocurrency mining operations
  • Built monitoring software compatible with multiple cryptocurrency mining pool protocols, including SHA-256 (Bitcoin)
  • Contributed to the launch of a medium-scale cryptocurrency mining operation in Paraguay, supporting its deployment and operational growth
JavaScriptJavaScript
Vue.jsVue.js
DockerDocker
PostgreSQLPostgreSQL
RedisRedis
19+

Senior Software Engineer

Deckers US
E-commerce
Sep 2023 - Dec 2023 · 3m
  • Adapted quickly to a three-month engagement, proactively learning the required technologies and addressing project challenges
  • Contributed to the development of a new eCommerce platform from scratch, implementing backend features using Rust, Terraform, and AWS Lambda
DockerDocker
AWSAWS
Project ManagementProject Management
AWS LambdaAWS Lambda
TerraformTerraform
3+

Senior Software Engineer

Iyrs.xyz
Cryptocurrency and Blockchain
Feb 2022 - May 2023 · 1y 3m
  • Adapted to a fast-paced startup environment by proactively addressing challenges, exploring new technologies, and contributing to the startup's overall success;

  • Developed and maintained parts of the protocol and its blockchain-based applications using Solidity, TypeScript, Postgres, and Rust, with the core protocol consensus mechanism deployed on Solana;

  • Built backend systems and SDKs to support blockchain-based applications, leveraging Rust to ensure seamless integration with front-end interfaces and external services, resulting in an SDK with over 100 downloads on crates.io;

  • Collaborated with cross-functional teams, including blockchain developers, product managers, and designers, to architect and implement scalable and secure Web3 solutions, successfully releasing a new core component of the protocol.

JavaScriptJavaScript
React.jsReact.js
DockerDocker
GraphQLGraphQL
AWS S3AWS S3
4+
Freelance

Senior Software Engineer

Freelance
Information Technology (IT) and Services
Dec 2021 · 4y 10m
  • Collaborated with clients in the software and Web3 industries to assess engineering needs, understand business objectives, and develop tailored solutions that improved development processes while achieving 100% client satisfaction
  • Assisted clients in defining project scope, requirements, and timelines, ensuring alignment between business goals and technical feasibility
  • Developed and deployed high-quality applications using JavaScript, TypeScript, Rust, and Ethereum technologies, consistently delivering successful outcomes and maintaining a 100% client satisfaction rate
DockerDocker
AWSAWS
UIUI
UXUX
Node.jsNode.js
14+
Karat

Tech Interviewer

Karat
HR and Recruitment
Sep 2021 - Dec 2021 · 3m
  • Conducted over 30 technical interviews for software engineering candidates as a freelance interviewer within a 3-month period;

  • Assessed candidates' programming proficiency in languages such as Java, Python, and C++, based on specific job requirements;

  • Maintained a professional and objective approach during interviews, adhering to ethical guidelines to ensure fairness and transparency in the assessment process.

JavaScriptJavaScript
JavaJava
PythonPython
C++C++

Senior Software Engineer

PwC Brazil
Insurance
Feb 2019 - Sep 2020 · 1y 7m
  • Joined a reputable consulting firm as a Software Engineer, specializing in traditional software development methodologies and contributing to the development of a test automation platform suite;

  • Developed and maintained software applications using established programming languages, frameworks, and technologies, including Java, Kotlin, Spring Boot, and Azure DevOps;

  • Adapted to client-specific software development processes and methodologies, aligning with the consulting firm's standards to ensure successful project outcomes;

  • Contributed to the project’s integration into the firm’s consulting services, resulting in a 20% increase in overall revenue.

JavaJava
FlaskFlask
SpringSpring
KotlinKotlin
Komus

Cofounder & Technical Lead

Komus
InsurTech
Dec 2017 - Dec 2017 · 0m
  • Co-founded an insurance-tech startup, securing angel funding to support business operations and growth;

  • Developed the initial business concept by conducting market research and identifying opportunities in the insurance technology sector, successfully raising 150k BRL in angel investment;

  • Assembled and managed a talented team, recruiting professionals with expertise in insurance, technology, and business development, increasing the team size by two software engineers;

  • Established strategic partnerships with insurance companies, brokers, and other relevant stakeholders, expanding the startup's network and customer base;

  • Achieved recognition by being selected for a mentorship program from São Paulo's town hall and the Google Campus Startup Zone Pilot program.

JavaScriptJavaScript
AWSAWS
TypeScriptTypeScript
React NativeReact Native
Project ManagementProject Management
7+
Retina

Junior Software Engineer

Retina
Video Streaming
Mar 2016 - Feb 2018 · 1y 11m
  • Collaborated with senior software engineers and team members to design and implement software components and features;

  • Assisted in the development and maintenance of surveillance software applications, incorporating key functionalities such as video capture, storage, retrieval, and analytics;

  • Contributed to the surveillance tool’s capability to gather 30 GB of biometric data daily;

  • Integrated software with hardware devices, including cameras, sensors, and access control systems, ensuring seamless communication and data exchange;

  • Deployed the project across multiple shopping malls and hospitals in the Rio de Janeiro metropolitan area, contributing to a 30% increase in company revenue.

C++C++
C#C#
OpenCVOpenCV
Machine LearningMachine Learning

Engineering excellence

All Backend Developers who have applied to Proxify are scored from 0 to 300 on engineering excellence, one of the five parameters we evaluate. This score reflects engineering excellence only, based on interviews, take-home assignments, live coding sessions, and/or on-the-job performance reviews. The curve shows how all evaluated Backend Developers are distributed across that range, where our acceptance threshold for this parameter sits, and where Gustavo stands.

050100150200250300Engineering excellence scoreShare of engineersmedianmeanProxifyacceptancethreshold
Gustavo
Score 175 · Top 17% of engineers

Education

Federal University of the State of Rio de Janeiro
Federal University of the State of Rio de Janeiro
Information Technologies2019 - 2021
EPD
Escola Politécnica da USP
Computer Engineering2018 - 2018
Universidade Federal do Rio de Janeiro
Universidade Federal do Rio de Janeiro
Computer Science2015 - 2021

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