Full Stack Developer

Company Description

TokenFlow is an onchain token clarity platform. A B2B product, giving protocols complete visibility of their token ecosystem, including: all holder addresses, all transactions and their types, market maker tracking and performance, DeFi positions, and much more.

We're a small, lean team with lots of experience in crypto and tokenomics. We've received funding, and we're looking for our first non-founder hire.

What You'll Do

• Design and implement scalable backend services and APIs
• Architect, deploy, and operate cloud-native systems on GCP, AWS, or Azure, optimized for performance, scalability, and reliability
• Own DevOps workflows end-to-end — CI/CD pipelines, infrastructure-as-code (Terraform/Pulumi), container orchestration, and environment management
• Build, operate, and optimize data ingestion and processing pipelines for high-volume, event-driven workloads
• Integrate and manage RPC-based data sources, designing resilient systems for rate-limited, high-throughput, and fault-tolerant data access
• Design, query, and optimize relational databases, with a strong focus on data modeling, indexing, query performance, and schema evolution
• Monitor and maintain system health — defining SLOs, setting up alerting, and diagnosing performance bottlenecks across services and databases
• Apply security best practices across services — authentication, authorization, secrets management, input validation, and safe handling of sensitive data
• Secure APIs and services against common vulnerabilities — injection, broken auth, and unauthorized access
• Enforce HTTPS and encryption for data in transit and at rest, and apply least-privilege access across services and infrastructure
• Run security checks in CI/CD pipelines, maintain audit logs for sensitive operations, and set up rate limiting to protect against abuse
• Maintain a workflow, continuously identify risks, review access controls, patch vulnerabilities, and improve defenses as systems evolve
• Integrate and secure crypto wallet flows in production — signing, transaction validation, and key management
• Collaborate across product, data, and infrastructure to ship features end-to-end
• Write clean, maintainable, well-tested, and well-documented code

Requirements

• Previous experience in fullstack, backend-focused software engineering, security engineering, or crypto/web3 development
• Strong experience building backend services and APIs
• Solid understanding of relational databases, query optimization, and schema design for performance at scale
• Experience with DevOps practices including CI/CD pipelines, infrastructure-as-code, and container orchestration (Docker, Kubernetes)
• Familiarity with cloud security fundamentals — secrets management, IAM, network policies, and secure API design
• Experience securing API routes and endpoints — proper auth middleware, route guards, role-based access control, and scoped permissions
• Understanding of how to handle sensitive data — PII, tokens, credentials — including encryption at rest, masking in logs, and secure storage practices
• Experience running and debugging production systems
• Familiarity with modern frontend frameworks
• Hands-on experience running and maintaining containerized workloads in cloud environments

Nice to Have

• Experience hardening production systems, database access controls, audit logging, and vulnerability scanning in CI pipelines
• Familiarity with the crypto industry, including core blockchain concepts and onchain data
• Experience with data-focused platforms (e.g. Dune Analytics, The Graph) and production-grade RPC node integration and monitoring

Salary: $36,000 - $42,000 USD

Fully remote, with preference if based in Brazil.