Back End Developer

What You'll Do Build the core backend platform using Golang, including authentication, user and account management, order processing, ledger management, and audit logging. You'll be building from scratch with no legacy code.Design simple, secure, and maintainable systems that are easy for auditors and penetration testers to understand.Deploy, manage, and optimize backend services on AWS (EC2/ECS, RDS/PostgreSQL, S3, IAM) following the architecture defined by the Senior Technical Advisor.Prepare the platform for external penetration testing by implementing OWASP Top 10 security best practices and remediating identified vulnerabilities.Produce clear technical documentation, including system architecture, data models, and security design, to support regulatory submissions.Collaborate closely with frontend, QA, and security teams while participating in thorough code reviews for security-critical features.Leverage AI coding tools to improve productivity while maintaining full ownership of code quality, testing, and deployment.Ensure sensitive company and customer data is handled securely and only within approved AI tools and internal controls. Requirements Strong backend programming fundamentals with experience in Golang preferred. Candidates with solid experience in Python, Node.js, or Java and a willingness to build in Go are also encouraged to apply.Experience delivering at least one end-to-end backend project, whether through work, internships, freelance engagements, or personal projects.Familiarity with AI-assisted development tools such as Claude Code, GitHub Copilot, Cursor, or similar, with the ability to validate and take ownership of generated code.Good understanding of SQL/PostgreSQL, Git, and RESTful API development.Passion for learning and working in a regulated fintech environment where security, code quality, and peer reviews are essential. Nice to Have Hands-on experience with AWS services (professional or personal projects).Knowledge of fintech or payment systems, including concepts such as double-entry ledgers and idempotency.Understanding of secure coding practices, OWASP Top 10, Capture The Flag (CTF) competitions, or cybersecurity coursework.Experience preparing applications for penetration testing or security audits.