Mobile Product Engineering
Android applications, mobile product concepts, UX-focused features, architecture planning and performance-minded implementation.
AndroidMobile UXProduct prototypesPerformance-minded builds
Taking on new projects
Softwarethat lasts.
An independent studio for Android, data platforms and enterprise systems — and a small lab that ships its own products, starting with Bitnwise Cloud.
Founded by Nikolaos Panagiotis Karakoulis
Files belong to you.
See plansServices
From product idea to polished implementation.
Fixed-fee discovery, a fixed quote, weekly previews and a handover your team can own.
Web Experiences & Digital Platforms
Modern websites, digital platforms, web communities, content systems, landing pages and polished product experiences.
Web designForums & communitiesCMSModern frontends
Data Platforms
Database design, analytics workflows, reporting layers, data quality logic, information architecture and scalable backend foundations.
PostgreSQLSQL ServerAnalyticsData workflows
Enterprise Systems
Architecture, automation, governance-aware workflows, technical documentation and reliable software for complex environments.
ArchitectureAutomationDocumentationReliability
AI & Automation
AI-assisted workflows, intelligent prototypes, internal tools, product experiments and automation systems.
AI workflowsAutomationPrototypesInternal tools
Work
Selected work.
Some of it is public. Most of it runs inside regulated environments, so it is described rather than shown.
Mobile / Systems
Android Ecosystem Engineering
Custom Android builds, kernel-level experimentation, performance work, and product thinking for mobile systems.
Android • Linux • Performance • Mobile ArchitectureEnterprise / Data
Credit Risk Analytics Platform
Enterprise analytics environment supporting rating workflows, reporting, risk model operations, and decision support.
Banking • Risk Analytics • SQL • ReportingData Engineering
High-Volume Database Optimization
Performance-focused SQL design, indexing strategy, data lineage and optimization thinking for large operational datasets.
PostgreSQL • SQL Server • Indexing • OptimizationProducts
Products in the lab.
Alongside client work, Bitnwise builds its own software — privacy-aware, calm, and small enough to finish.
Writing
Notes from the studio.
On Android, data systems, enterprise software and building things that last.
Engineering · 5 min read
Why large Nextcloud uploads end in a 504 on S3 storage
A 3 GB upload to Nextcloud on S3-compatible storage finished, then sat on “assembling” for minutes and failed with a 504. The upload was not the cause.
Products · 5 min read
Building QuietHaze
The product idea behind adaptive ambient environments for focus and calm.
Products · 4 min read
Building Lumina Guardian
The product idea behind adaptive visual privacy for mobile devices.