Titus K.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

I design and build reliable backend and payment integration systems for fintech companies, banks, and organizations that need their systems to work correctly in production. I specialize in integrating payment platforms (M-Pesa, PayPal, Pesalink, Cards, banking APIs), automating manual business processes, and building scalable backend APIs used by thousands of users. What I help clients with: Payment integrations and transaction workflows (M-Pesa, Pesalink, PayPal, banking systems etc) Backend REST APIs with pagination, filtering, and search System integrations and asynchronous/event-driven processing Automating manual workflows (registrations, admissions, reporting) Data migration from Excel or legacy systems to production databases Relevant experience and results: Built backend systems supporting 6,000+ conference delegates over 2 years Designed a custom learning management system, automating admissions and migrating 3,000+ students from Excel to a centralized platform Delivered banking and fintech integrations used in live production environments Built monitoring and reporting backends for customer, account, and transaction activity I work comfortably with regulated environments, production systems, and distributed teams. I focus on clear communication, clean API design, and building systems that are maintainable and dependable. If you need a backend or payment integration engineer who understands scale, data integrity, and real-world usage, not just code, feel free to reach out and discuss your project.