Open to opportunities

Raymond Sung-Seh Harrison

@sungseh

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Senior mobile app developer specializing in cross-platform solutions and UX leadership.

Ghana

Message

What I'm looking for

I seek remote or relocation-friendly roles where I can lead mobile development, improve UX, work in agile teams, and drive secure, scalable production systems.

I am a senior mobile app developer with 7+ years building high-performance cross-platform applications and scalable web solutions. I specialize in Flutter and React Native while also working with native Swift, Kotlin and Java to deliver polished, production-ready apps.

As a team lead I have managed and mentored developers, led CI/CD and API design efforts, and delivered enterprise-level, PCI-DSS–compliant systems integrated with banking services. My leadership reduced deployment time by 35% and cut transaction failures by 30%.

My background in UI/UX design drives user-centric product decisions; I create wireframes, prototypes, and motion design that improved approval efficiency and increased user adoption and retention. I also conduct usability testing and research to ensure measurable UX improvements.

I thrive in agile teams focused on quality, secure systems, and continuous delivery. I am open to relocation and remote roles and look to bring technical depth, product-focused design, and proven delivery outcomes to a growth-minded company.

Experience

Work history, roles, and key accomplishments

Current

Team Lead, App Developer

Current

Deskit Technologies

Oct 2017 - Present (7 years 11 months)

Led a team of 3 developers to design and deliver mobile apps, websites, and enterprise systems serving millions across Africa; implemented CI/CD and scalable APIs reducing deployment time by 35% and cut bug reports by 40%.

Flutter React Native CI CD REST APIs BLoC Firebase Team Leadership

UI/UX Designer (Freelance)

Various Clients

Jul 2014 - Dec 2024 (10 years 5 months)

Delivered UI/UX designs and interactive prototypes that increased user engagement and conversion rates by 30% and improved design approval efficiency by 40% through research-driven iterations.

Figma Adobe XD Prototyping Usability Testing Motion Design UX Research Interaction Design Wireframing

Web and Software Developer

Bsystems Limited

Sep 2016 - Sep 2017 (1 year)

Developed and maintained web and native applications, optimized databases and servers to achieve 99.9% uptime and reduced load times by 25%, improving overall user experience and security.

PHP Laravel MySQL Performance Optimization Authentication Deployment

IT Personnel

Quaza IT Solutions

May 2016 - Aug 2016 (3 months)

Led a team to develop and maintain a web platform and created multimedia content for an e-learning platform, reducing project delivery time by 12% and improving course accessibility.

Web Development Graphic Design Adobe Captivate Database Management Team Coordination Platform Security

Teaching Assistant

University of Ghana

Sep 2013 - Jun 2016 (2 years 9 months)

Taught Introduction to IT, Web Design, and Multimedia and assisted in courses for 150+ students, improving student comprehension and engagement by 15–20% and enhancing eLearning content accessibility.

Teaching Curriculum Development Sakai LMS Web Design Multimedia

Education

Degrees, certifications, and relevant coursework

University of Ghana

Bachelor of Science, Computer Science and Physics

2009 - 2013

Activities and societies: Teaching Assistant roles, participation in web programming and database administration training

Bachelor of Science in Computer Science and Physics completed at the University of Ghana, Legon, focusing on core computing and physics principles and practical applications.