Jeffery

iOS QA & Beta Testing Specialist

Fiverr • Freelance

Sep 2026 - Present • 0 mos

Conducted comprehensive TestFlight beta testing for Hustle City, an iOS productivity and lifestyle app combining habit tracking, goal-setting, and gamified self-improvement features. Managed the end-to-end testing process over a 14-day cycle to evaluate real-world usage patterns and app stability over time — not just a single-session review. Testing covered every core feature area: Dashboard, Timebox/Top 5 Priorities, Habits, Goals, Hustle AI assistant, Daily Affirmations, Vision Board, Audiobooks, and gamification elements including Cars, Properties, City Map, and Racing/Boss Ladder — along with Community, Settings, and the Premium subscription flow. Focused on identifying crashes, broken UI elements, layout issues, slow load times, login/authentication problems, and paywall/subscription bugs. Documented all findings with screenshots and screen recordings, tracked recurring-use behavior across multiple sessions, and delivered structured, actionable feedback to support a smoother pre-launch release.

Vibe Coding Developer (AI-Assisted Development)

Vibe Coding Turkey • Freelance

Sep 2024 - Present • 2 yrs

Specialized in vibe coding, building and refining applications using AI-assisted development tools and no-code/low-code platforms like Base44, Lovable, and Bolt. Helped founders turn rough app ideas into working products fast, then stepped in to clean up, debug, and production-harden AI-generated code that broke under real usage. Reviewed AI-built apps for security gaps, broken logic, and scalability issues, translating "prompt-built" prototypes into stable, maintainable software. Worked across authentication flows, database structures, payment integrations, and API connections that AI tools typically leave fragile. Bridged the gap between fast AI-driven prototyping and solid engineering fundamentals, giving non-technical founders confidence their app could actually handle paying customers. Known for speed without cutting corners on code quality

Full-Stack Software Developer

Software Development Company, Mobile App & Web Development Service • Freelance

Sep 2024 - Present • 2 yrs

Delivered full-stack development services for startups and small businesses, specializing in Base44 application audits, bug fixes, and production-readiness reviews. Built and integrated Stripe payment systems, resolved authentication and API issues, and completed stalled MVPs across React, Node.js, and Supabase stacks. Conducted technical audits identifying security gaps, broken workflows, and performance issues before handing clients clear, prioritized fix reports. Worked directly with non-technical founders to translate complex backend problems into plain-language solutions, consistently delivering fast turnarounds on fixed-price and hourly contracts. Combined traditional coding practices with AI-assisted development tools to speed up delivery without compromising code quality or long-term maintainability. Built a reputation for honest technical assessments and clean, well documented handoffs