Native and cross-platform
Swift, Kotlin, Flutter, and React Native — chosen per project to balance reach, performance, and long-term maintenance.
App Development
Mobile apps that hold up in production.
We engineer native and cross-platform apps with measurable performance, security baked in, and a delivery cadence your team can rely on.
Pillars
App engineering pillars
Three areas we hold to a senior standard on every engagement — from framework choice to release pipeline.
Performance and security
Profiled startup, memory, and battery budgets paired with secure storage, certificate pinning, and GDPR-compliant data flows.
Quality and delivery
Automated UI and integration tests, CI/CD pipelines, and staged rollouts so every release is observable and reversible.
Recent work
Current projects at a glance
Selected product visuals from references already listed on our projects page.
Finance1Up Capital GmbH
1Up Capital – Instant Liquidity for Publishers
EventsAPIS Events
Strong Brand Web Presence for APIS Events
SoftwareFolkz GmbH
JobPost+ – Smart Recruiting Platform in Corporate Design
Social MediaIn2nite UG
Frynz – Social Networking in Real Time
GamesSL GmbH
Learn employment law playfully with LexQuiz!
SEOnot public
SEO Tool — Technical SEO with Real-Time Feedback
Sportnot public
Training Camp App – Appointments & Check-ins in Real Time
BlockchainVision Crypto LLC
Vision Wallet – Multi-Chain, Realtime, Exchange
PsychologyProf. Dr. Oettingen
WOOP App – Motivational Aid Reimagined
By the numbers
This is hafencity.dev
15+ Experts
Engineers, designers, and strategists working as one practice from our Hamburg HQ.
50+ Clients
Companies across consumer, healthcare, and B2B trust us with their digital products. Long-term partnerships are the default.
97% Recommendation rate
Repeat engagements and references our buyers actually call. Trust compounds when delivery does.
50+ Launches
Custom mobile and web products shipped from concept to maintenance — owned end-to-end by our team.
100% In-house
Strategy, design, and engineering all live at our Hamburg HQ. One team, one project lead, accountable to you from kickoff to launch.
Since 2023
Helping companies ship digital products — and growing alongside the teams we work with.
Next steps
Let's talk about your project
Book a 30-minute discovery call. We'll review your goals, surface unknowns, and outline how we would run the engagement.