Marc Sitze | Senior Frontend Lead & Full-Stack Engineer (Next.js, AI, Fintech)

Case Studies

Featured Case Studies

Real-world engineering solutions delivering measurable impact in AI, Fintech, and scalable web apps.

aiFrontend Lead

Bubo (France / Remote)2024 - 2025

A revolutionary AI document archiving & management solution featuring instant vector search and GPT-style conversational retrieval.

< 350msQuery Retrieval Time

100k+Indexed Documents

+75%Task Efficiency

Next.js 15React 19TypeScriptTailwind CSS

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fintechSoftware Engineer

Maviance PLC2022 - 2024

Enterprise customer and merchant payment portal engineered to process high-volume corporate transactions securely across Central Africa.

$10M+Monthly Transaction Volume

99.4%Payment Success Rate

99.9%Uptime SLA

ReactTypeScriptNode.jsExpress

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marketplaceFull-Stack Engineer & Lead

Warap Work2023 - 2024

Bilingual (English & French) micro-jobs marketplace connecting task posters with verified gig workers across Africa and the diaspora.

100% EN/FRBilingual Localization

< 5sEscrow Milestone Speed

98/100Lighthouse Performance

Next.jsReactTypeScriptTailwind CSS

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mobileMobile Engineer

AfricaFix Logistics2023

On-demand logistics and appliance repair service mobile app connecting homeowners with vetted technicians in real time.

60 FPSScreen Interaction Speed

InstantOffline Cache Sync

4.8 / 5Customer Rating

React NativeExpoTypeScriptReact Query

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