Marco Oliveira
Backend Developer
Aracaju
Summary
As a software developer with 5 years of experience, I specialize in Golang, Solidity, blockchain, and Ethereum. Proficient in RESTful APIs and microservices development with gRPC. Skilled in both SQL and NoSQL databases, and experienced in real-time messaging systems using Apache Kafka.
Recognized for proactive problem-solving and analytical thinking, I approach challenges systematically. Communicative and creative, with a knack for innovative solutions and quick adaptation to new challenges and technologies.
Overview
4
4
years of professional experience
2
2
Languages
Work History
Tech Lead
Klever/io
05.2022 - 02.2024
- Led the Krypto Banking team in developing a multi-chain custody application focused on NFT gaming.
- Managed a team to support over 50,000 Devikins game users, facilitating more than 5000 daily internal transactions outside the blockchain.
- Designed a workflow capable of efficiently and securely processing over 2000 blockchain transactions per minute.
- Highlighted accomplishment: Designed and implemented a validation and consolidation flow for transactions received by custodial addresses.
- Employed the following technologies in the construction of the application: Golang, Apache Kafka, RESTful API, gRPC, SQL (Postgres), NoSQL (Redis), microservices architecture, event-driven architecture, Docker, Kubernetes, and GCP (Google Cloud Platform).
Backend Developer
Klever/io
01.2021 - 05.2022
- Contributed to the project design process and implemented initial versions of the exchange.
- Within just over a year of launching the project, achieved a user base of 80,000 and processed over 500,000 orders within a 30-day period, demonstrating the resilience, security, and scalability of the system we designed.
- Implemented improvements in database queries, added indexes, and introduced caching mechanisms. Resulted in a reduction of over 50% in latency for keypair and order-related calls, enhancing overall system performance and responsiveness.
- Successfully addressed challenges such as real-time streaming of order state changes due to high volume and capturing order data to generate candlesticks at different time intervals.
Mobile Developer
Klever/io
09.2019 - 01.2022
- Contributed to the maintenance and updates of Klever Wallet and Klever Browser.
- Participated in integrating new features and blockchain networks such as Bitcoin, Ethereum, Tron, Binance, among others.
- Utilized JavaScript, React Native, Redux, Jest, Enzyme, and Espresso as primary tools for development.
Education
Bachelor of Science - Computer Science
Universidade Federal De São Carlos
São Carlos, Sao Paulo, Brazil 05.2001 -
Skills
Golang
Performance Optimization
Technical problem solving
Scalability Solutions
Message broker experience
Knowledge of design patterns
Proficient in RESTful APIs
Timeline
Tech Lead
Klever/io
05.2022 - 02.2024
Backend Developer
Klever/io
01.2021 - 05.2022
Mobile Developer
Klever/io
09.2019 - 01.2022
Bachelor of Science - Computer Science
Universidade Federal De São Carlos
05.2001 -