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backendarchitec

Steffen Wanne

@backendarchitec

Helping startups and businesses build, fix, and optimize mobile and web apps

Allemagne
Allemand, Anglais, Italien, Espagnol
Certaines informations sont présentées en anglais.
À propos de moi
Hi, I'm Steffen Wannemaker, a professional mobile app developer and full-stack web developer. I specialize in Flutter mobile apps and modern web applications. I help startups and businesses fix bugs, optimize performance, and build scalable front-end and back-end systems. With solid experience in React, APIs, and database integration, I deliver clean, efficient, and reliable solutions. If your app needs speed, stability, or a fresh build, message me now and let’s get it done.... Plus d’infos

Compétences

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backendarchitec
Steffen Wanne
hors ligne • 
Temps de réponse moyen de 1 heure

Voir mes services

Développement multiplateforme
I will do flutter mobile app development, android ios app development flutter developer
De100 $US / projetPlus de détails
Sites Web personnalisés
I will build responsive website using react, HTML, CSS, javascript, front end developer
De80 $US / projetPlus de détails

Portfolio

Expérience professionnelle

Fintech

Flutter Mobile & Full-Stack Developer

Fintech • Freelance

May 2024 - Present • 2 yrs

I am a professional Flutter Mobile and Full-Stack Developer specializing in building high-performance, scalable, and user-friendly mobile and web applications for businesses and startups. My work focuses on delivering complete end-to-end solutions, including mobile app development, frontend interfaces, backend integration, and API development. I have experience working on production-level applications such as e-commerce apps, booking systems, and business management platforms. Key responsibilities and achievements include: Developing cross-platform mobile applications using Flutter (iOS & Android) Building responsive and modern UI/UX designs with clean architecture principles Implementing state management solutions (Provider / Bloc / Riverpod) Integrating RESTful APIs and third-party services Developing backend services and connecting databases for real-time data flow Fixing bugs and optimizing app performance for smooth user experience Improving app stability, reducing crashes, and enhancing loading speed Working on authentication systems, payment flows, and notification systems Collaborating with clients to turn ideas into fully functional digital products I focus on writing clean, maintainable code and delivering scalable solutions that meet real business needs. My goal is always to build applications that are not only visually appealing but also technically strong and production-ready.