| Blockchain Developer | Senior

Description

**[Blockchain Developer | Senior]** Remote | 44 hours per week **To get to know us better** We develop people, software & businesses +16 years of experience developing software across 4 continents with an NPS of +84, placing us in the excellence zone! We specialize in digital solution development (web, mobile, BI, RPA, among others), with offices in São Paulo, Porto Alegre, Belo Horizonte, and the USA. **Opportunity Overview:** * We are seeking a Senior Blockchain Developer to build a medical supply chain platform based on blockchain, focused on pharmaceutical traceability, prescription control, and regulatory compliance. The professional will be responsible for implementing the blockchain architecture, developing smart contracts (chaincodes), configuring network security and identity, and delivering a robust MVP for presentation to corporate clients and government agencies. **Responsibilities and Duties:** * Implement and configure private networks using Hyperledger Fabric; * Develop and maintain chaincodes (smart contracts) for traceability and transaction validation processes; * Configure and administer network identity, authentication, and authorization mechanisms; * Integrate corporate applications and external systems with the blockchain via secure APIs; * Ensure security, integrity, and immutability of transactional data; * Define and implement a scalable, production-ready deployment architecture; * Participate in business process modeling and regulatory compliance rule definition; * Perform blockchain network troubleshooting and performance analysis; * Support technical and architectural decisions related to the platform; * Fluent English for communication with international stakeholders and reading technical documentation. **Required Skills:** * Experience with Hyperledger Fabric; * Chaincode (Smart Contract) development in Go, Node.js/TypeScript, or Java; * Configuration and administration of private blockchain networks; * Knowledge of authentication, digital certificates, and access control; * Experience with REST APIs and system integrations; * Knowledge of cryptography and application security; * Hands-on experience with Docker and Kubernetes; * Experience with SQL or NoSQL databases; * Code versioning with Git; * Ability to troubleshoot and resolve issues in distributed environments. **What You’ll Find at GX2:** * Hub of original content segmented by knowledge tracks (AI, QA, Agility, UX/UI Design, Product, Software Development); * Monthly talks focused on soft skills development; * Culture of care for people and mental health; * Mental health and well-being platform; * GX2 Follow Up: Individual monthly check-ins focused on well-being and professional development. **A Message from GX2:** This position is open to all interested individuals. We work daily to build a diverse and plural environment that values and respects differences, champions freedom to be one’s authentic self, and stands firmly against stereotypes and prejudice.