Specialized Software Engineer | Fintech & AI Solutions Expert I'm Faith Olusegun, a versatile software engineer with 7+ years of experience specializing in cloud-native applications, financial systems, and AI/ML solutions. My expertise spans enterprise-grade backend development (C#, Java, Spring), DevOps orchestration (Kubernetes, ArgoCD), and cutting-edge AI research (LLMs, PyTorch). What differentiates me is my proven ability to modernize legacy systems (1500% performance gains), architect secure fintech infrastructure (100% OWASP compliance), and deliver scalable solutions for financial institutions, asset management firms, and AI research labs. Employment & Project Experience Senior Software Engineer | Interswitch Group (West Africa's Largest Fintech Aggregator) April 2024 – Present Reengineered critical financial platforms: Migrated Vert.x → Spring Boot systems and upgraded .NET 3.X/4.X → modern .NET Core Architected scalable fintech solutions using Java/Spring Framework deployed on Kubernetes clusters Stack: Java, Spring Boot, C#, ASP.NET Core, Docker, Kubernetes, ArgoCD, Microservices, SQL Server Research Associate (AI/LLMs) | Sobel.io (Stockholm-based AI Lab) June 2023 – March 2024 Developed AI psychotherapy tools (comparator) featured on Swedish Radio using Rust/LLM chains Created cross-platform deployment systems for macOS applications (empatik.ai) Stack: Rust, LLM-chain, OpenAI GPT-3.5, Tauri, AWS, React, GitHub Actions Software Developer (Fintech Infrastructure) | ARM Holding (Asset Management) April 2023 – May 2023 Engineered statement generation service reducing processing time from 5 days → 6 hours for 100k+ clients Built enterprise monitoring tool (Agent94) tracking 20+ APIs/10 DB servers with 98%+ security compliance Stack: C#, .NET Core, Python, Docker, 42Crunch, SQL Server Software Engineer (Banking Systems) | Parallex Bank / Fidelity Bank PLC 2020 – 2022 Integrated core banking systems with CBN, NIBSS, and tax/revenue platforms (Lagos State, Customs) Secured APIs to 100% OWASP compliance using 42Crunch analyzer Stack: C#, ASP.NET Core, RabbitMQ, Azure API Management, SQL Server AI & Cloud Consultant | Wragby Business Solutions October 2021 – February 2022 Designed pharmaceutical barcoding/QR solutions deployed for supermarket chains Stack: C#, ASP.NET Core, SQL Server, ORM Key Differentiators Fintech Specialization: Built/core-integrated systems for 4+ financial institutions (banks, asset managers, payment gateways) Performance Transformer: Consistently delivers 10x+ efficiency gains (1500% performance boost at ARM) Security-First: API solutions scoring 98-100% on OWASP benchmarks AI Innovator: Contributed to open-source LLM projects (Rust) and psychotherapy AI tools Full-Stack Agility: Proficient from infrastructure (Kubernetes) → AI (LLMs) → frontend (React/JavaScript)…Specialized Software Engineer | Fintech & AI Solutions Expert I'm Faith Olusegun, a versatile software engineer with 7+ years of experience specializing in cloud-native applications, financial systems, and AI/ML solutions. My expertise spans enterprise-grade backend development (C#, Java, Spring), DevOps orchestration (Kubernetes, ArgoCD), and cutting-edge AI research (LLMs, PyTorch). What differentiates me is my proven ability to modernize legacy systems (1500% performance gains), architect secure fintech infrastructure (100% OWASP compliance), and deliver scalable solutions for financial institutions, asset management firms, and AI research labs. Employment & Project Experience Senior Software Engineer | Interswitch Group (West Africa's Largest Fintech Aggregator) April 2024 – Present Reengineered critical financial platforms: Migrated Vert.x → Spring Boot systems and upgraded .NET 3.X/4.X → modern .NET Core Architected scalable fintech solutions using Java/Spring Framework deployed on Kubernetes clusters Stack: Java, Spring Boot, C#, ASP.NET Core, Docker, Kubernetes, ArgoCD, Microservices, SQL Server Research Associate (AI/LLMs) | Sobel.io (Stockholm-based AI Lab) June 2023 – March 2024 Developed AI psychotherapy tools (comparator) featured on Swedish Radio using Rust/LLM chains Created cross-platform deployment systems for macOS applications (empatik.ai) Stack: Rust, LLM-chain, OpenAI GPT-3.5, Tauri, AWS, React, GitHub Actions Software Developer (Fintech Infrastructure) | ARM Holding (Asset Management) April 2023 – May 2023 Engineered statement generation service reducing processing time from 5 days → 6 hours for 100k+ clients Built enterprise monitoring tool (Agent94) tracking 20+ APIs/10 DB servers with 98%+ security compliance Stack: C#, .NET Core, Python, Docker, 42Crunch, SQL Server Software Engineer (Banking Systems) | Parallex Bank / Fidelity Bank PLC 2020 – 2022 Integrated core banking systems with CBN, NIBSS, and tax/revenue platforms (Lagos State, Customs) Secured APIs to 100% OWASP compliance using 42Crunch analyzer Stack: C#, ASP.NET Core, RabbitMQ, Azure API Management, SQL Server AI & Cloud Consultant | Wragby Business Solutions October 2021 – February 2022 Designed pharmaceutical barcoding/QR solutions deployed for supermarket chains Stack: C#, ASP.NET Core, SQL Server, ORM Key Differentiators Fintech Specialization: Built/core-integrated systems for 4+ financial institutions (banks, asset managers, payment gateways) Performance Transformer: Consistently delivers 10x+ efficiency gains (1500% performance boost at ARM) Security-First: API solutions scoring 98-100% on OWASP benchmarks AI Innovator: Contributed to open-source LLM projects (Rust) and psychotherapy AI tools Full-Stack Agility: Proficient from infrastructure (Kubernetes) → AI (LLMs) → frontend (React/JavaScript)WWWW…