I am a senior mobile and web application developer with 12 years of experience working with leading technologies such as React Native, JavaScript, Swift, Kotlin, Node.js, Go, and Express.js. I pride myself on delivering high-quality applications that exceed client expectations by leveraging my expertise in Redux, TypeScript, and AWS. I am committed to continuous improvement and innovation in software development practices. I have strong cross-platform development skills with a focus on mobile and web UI/UX architecture, and I am experienced in optimizing performance for both front-end and back-end systems using RESTful and GraphQL APIs. I have worked extensively with various databases, including MongoDB, PostgreSQL, MySQL, and NoSQL, and I aim to enhance user experiences through innovative solutions and robust system design.

Kacper Markowski

I am a senior mobile and web application developer with 12 years of experience working with leading technologies such as React Native, JavaScript, Swift, Kotlin, Node.js, Go, and Express.js. I pride myself on delivering high-quality applications that exceed client expectations by leveraging my expertise in Redux, TypeScript, and AWS. I am committed to continuous improvement and innovation in software development practices. I have strong cross-platform development skills with a focus on mobile and web UI/UX architecture, and I am experienced in optimizing performance for both front-end and back-end systems using RESTful and GraphQL APIs. I have worked extensively with various databases, including MongoDB, PostgreSQL, MySQL, and NoSQL, and I aim to enhance user experiences through innovative solutions and robust system design.

Available to hire

I am a senior mobile and web application developer with 12 years of experience working with leading technologies such as React Native, JavaScript, Swift, Kotlin, Node.js, Go, and Express.js. I pride myself on delivering high-quality applications that exceed client expectations by leveraging my expertise in Redux, TypeScript, and AWS. I am committed to continuous improvement and innovation in software development practices.

I have strong cross-platform development skills with a focus on mobile and web UI/UX architecture, and I am experienced in optimizing performance for both front-end and back-end systems using RESTful and GraphQL APIs. I have worked extensively with various databases, including MongoDB, PostgreSQL, MySQL, and NoSQL, and I aim to enhance user experiences through innovative solutions and robust system design.

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Experience Level

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Work Experience

Senior Full Stack Engineer at SoftTeco
June 1, 2025 - September 3, 2025
Discovered and resolved the three biggest causes of crashes on US boat rental platform by implementing bug fixes, improving app stability by 32% within 8 days. Developed and released multiple mobile app features end-to-end, from UI to API integration. Used Xcode, Android Studio, Gradle, Flipper, and React Native Debugger in day-to-day development.
Senior Software Engineer at Accenture
May 1, 2022 - September 3, 2025
Contributed to multiple web and mobile products in a cross-functional team, focusing on performance, maintainability, and smooth user experience. Migrated core mobile features from Flutter to React Native and added new capabilities. Built front-end features with React Native (JavaScript) and integrated Firebase for authentication, storage, and push notifications. Implemented custom Google Maps overlays, routes, and interactive markers in React Native. Used Redux for application state management in both mobile and web apps. Integrated OAuth authentication flows across web and mobile. Set up push notifications via APNS and FCM. Delivered features in close coordination with QA, designers, and backend teams.
Software Engineer at Endava
June 1, 2018 - September 3, 2025
Worked on web and mobile applications for multiple clients, handling both new development and ongoing support. Built a dealer portal web app using HTML5, CSS3, JavaScript, Bootstrap, AngularJS, and ReactJS. Developed iOS apps using MVC architecture and integrated third-party SDKs like Stripe and SDWebImage. Connected iOS apps to Go-based backend services with monitoring via Prometheus and OpenTelemetry. Created CI/CD pipelines with automated unit tests (Jest) and E2E tests (Cypress). Managed deployments to staging and production, plus mobile releases to TestFlight, App Store, and Google Play. Added and maintained AWS Amplify + Node.js APIs for mobile features like data read/write.

Education

Bachelor’s Degree in Computer Science at Lund University, Sweden
June 1, 2009 - September 1, 2012

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Computers & Electronics, Consumer Goods, Financial Services, Professional Services

Experience Level

Expert
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Intermediate
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