Web Development

Web platforms built to last.

We design, build, and operate web applications with modern frameworks, durable architecture, and accessibility built in.

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Pillars

Web engineering pillars

Three areas we hold to a senior standard on every engagement — from framework choice to runtime performance.

Modern frameworks

Next.js, React, and TypeScript with server components, type-safe APIs, and content-aware caching as defaults.

Architecture and scaling

Composable services, event-driven flows, and cloud-native deployments that grow with your traffic and team.

Accessibility and performance

WCAG 2.2 AA targets, Core Web Vitals budgets, and observability wired in before launch — not bolted on after.

Recent work

Current projects at a glance

Selected product visuals from references already listed on our projects page.

Digital Wellbeing / Consumer App

Sperrstunde

An iOS app that reduces doomscrolling, blocks apps on schedule and supports better sleep routines.

Games

SL GmbH

A learning game that makes employment-law content understandable, interactive and easy to repeat.

Software

Folkz GmbH

A recruiting platform that helps HR teams create, review and publish job ads faster.

Public Sector / City App

Berlin App

A mobile city-service concept with onboarding, Berlin Card logic and clear guidance for everyday use cases.

Marketplace / Construction Industry

B2B machinery marketplace

A B2B marketplace for construction companies with trust signals, contract logic and clear request flows.

AI / Sustainability

Verda

An AI chat app for sustainable decisions with model routing, impact transparency and launch support.

Blockchain

Vision Crypto LLC

A crypto wallet that brings portfolio, transfers and market data for multiple chains into real-time workflows.

Social Media

Frynz

A social app for spontaneous meetups, live maps and event chats in a focused mobile experience.

Mobility / Fleet Management

Fleet management platform

An operational fleet platform for maintenance, costs, vehicle data and tasks across 20 to 500 vehicles.

Psychology

Prof. Dr. Oettingen

A mobile WOOP app that turns goal setting, motivation and reflection into a clear daily routine.

Sports Gaming / Fantasy Sports

Tentasy

A fantasy-tennis concept with team selection, league logic and a mobile community experience.

Education / Social Community

StudyNect

A campus app that connects students through interests, groups and communities.

Finance

1Up Capital GmbH

A finance platform that gives publishers predictable pre-financing and transparent payout workflows.

EdTech / School Administration

Akteo

A school-records platform that brings data, documents and workflows into one secure web system.

Industrial SaaS / Mechanical Engineering

Mechanical-engineering service portal

A service portal that unifies machines, tickets, spare parts and live data in one workflow.

Field Service / Trades & Mid-Market

Field-service platform

A field-service platform that connects dispatch, technicians, reports and knowledge data in real time.

Sport

not public

A training-camp app for groups, schedules and check-ins that simplifies on-site organization.

Fitness / HealthTech

not public

An app concept for connected gyms with check-in, live training, sleep tracking and goal management.

Events

APIS Events

A distinctive web presence that brings event formats, brand identity and inquiry paths into one clear flow.

SEO

not public

A technical SEO tool that combines crawling, issue analysis and prioritized recommendations in one dashboard.

Digital Wellbeing / Consumer App

Sperrstunde

An iOS app that reduces doomscrolling, blocks apps on schedule and supports better sleep routines.

Games

SL GmbH

A learning game that makes employment-law content understandable, interactive and easy to repeat.

Software

Folkz GmbH

A recruiting platform that helps HR teams create, review and publish job ads faster.

Public Sector / City App

Berlin App

A mobile city-service concept with onboarding, Berlin Card logic and clear guidance for everyday use cases.

Marketplace / Construction Industry

B2B machinery marketplace

A B2B marketplace for construction companies with trust signals, contract logic and clear request flows.

AI / Sustainability

Verda

An AI chat app for sustainable decisions with model routing, impact transparency and launch support.

Blockchain

Vision Crypto LLC

A crypto wallet that brings portfolio, transfers and market data for multiple chains into real-time workflows.

Social Media

Frynz

A social app for spontaneous meetups, live maps and event chats in a focused mobile experience.

Mobility / Fleet Management

Fleet management platform

An operational fleet platform for maintenance, costs, vehicle data and tasks across 20 to 500 vehicles.

Psychology

Prof. Dr. Oettingen

A mobile WOOP app that turns goal setting, motivation and reflection into a clear daily routine.

Sports Gaming / Fantasy Sports

Tentasy

A fantasy-tennis concept with team selection, league logic and a mobile community experience.

Education / Social Community

StudyNect

A campus app that connects students through interests, groups and communities.

Finance

1Up Capital GmbH

A finance platform that gives publishers predictable pre-financing and transparent payout workflows.

EdTech / School Administration

Akteo

A school-records platform that brings data, documents and workflows into one secure web system.

Industrial SaaS / Mechanical Engineering

Mechanical-engineering service portal

A service portal that unifies machines, tickets, spare parts and live data in one workflow.

Field Service / Trades & Mid-Market

Field-service platform

A field-service platform that connects dispatch, technicians, reports and knowledge data in real time.

Sport

not public

A training-camp app for groups, schedules and check-ins that simplifies on-site organization.

Fitness / HealthTech

not public

An app concept for connected gyms with check-in, live training, sleep tracking and goal management.

Events

APIS Events

A distinctive web presence that brings event formats, brand identity and inquiry paths into one clear flow.

SEO

not public

A technical SEO tool that combines crawling, issue analysis and prioritized recommendations in one dashboard.

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.

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