Balogun Ezekiel

Results-driven Full-Stack Software Engineer and CNCF Certified Cloud Native Engineer with 4+ years of experience building scalable fintech, healthcare, and EdTech platforms. Specialises in event-driven systems, idempotent payment APIs, webhook handling, background job processing, and transactional data integrity supporting 10K+ concurrent users, 1,000+ requests per second, and sub-200ms API latency. Experienced in JWT-based authentication, audit logging, DevSecOps platform ownership, production incident response, and cloud-native tooling using Node.js, PostgreSQL, Apache Kafka, Redis, and BullMQ.

Backend Developer - Delphi EduHub - Remote

(2026)

• Powered an EdTech platform for 2,000+ students and instructors by designing a normalized PostgreSQL schema with star and snowflake modeling, cutting query times and ensuring clean, consistent data across the platform.
• Eliminated unauthorized access risks by designing RBAC workflows and engineering RESTful APIs with NestJS and TypeScript, enabling safe multi-role platform usage across students, instructors, and admins.
• Improved deployment reliability by containerizing the platform with Docker and configuring CI/CD pipelines, reducing manual errors and accelerating release cycles.

Backend Engineer - Accessivo (Techitcheap) - Ilorin

(2025-07 - 2025-12)

• Secured 500+ daily financial transactions by engineering idempotent fintech APIs with atomic SQL Server transactions, TRY...CATCH error handling, and full audit logging — ensuring zero data corruption and complete payment traceability.
• Built Paystack webhook handlers with cryptographic signature verification and graceful retry logic, ensuring no payment event was lost or processed twice under external API failures.
• Restored payment API stability during a critical production incident by identifying database bottlenecks, optimizing queries, and implementing monitoring — cutting latency by 35% and preventing recurrence.

Full-Stack Engineer - Archsaint Nexus (HealthMate) - Remote

(2026)

• Delivered a HIPAA-compliant telemedicine platform for 1,000+ patients integrating appointment scheduling, pharmacy management, and video consultations via Daily.co — with resilient fallback mechanisms for each external dependency.
• Engineered secure JWT-based authentication with RBAC, ensuring patients, doctors, and admins each accessed only their permitted resources.
• Safeguarded critical patient data integrity by implementing savepoint-based transactions and deadlock handling strategies, preventing data loss during concurrent database operations.

AI Training Engineer (Freelance) - Outlier - Remote

(2024)

• Evaluated and optimized generative AI models by aligning complex algorithmic logic, discrete mathematics, and data structures with production-grade software design principles.
• Authored rigorous, mathematically sound reference implementations and test cases to train LLMs on high-level computational logic, code optimization, and architectural workflows.
• Conducted detailed logical reviews and error analyses on model outputs, correcting flaws in mathematical reasoning, statistical validity, and algorithmic proof structures.

B.Sc (Ed) - Mathematics - University of Lagos (2019 - 2025)