Independent developer · Available for selected projects

I turn complex
ideas
into shipped software.

I work with product teams that need an experienced builder to turn an unclear idea, unfinished product, or technical bottleneck into dependable software.

Aaron Weigl, freelance full-stack developer in Köln

Full-stack, end to end

From first sketch to a dependable release, I bring the product and engineering decisions together.

How I help

Less handoff.
More momentum.

A good fit is a team with a real product problem and a need for one partner who can connect product decisions, engineering trade-offs, and delivery.

Product development

For new products or unfinished builds: clarify the core user need, focus the scope, and turn the next version into a usable customer experience.

MVPsWeb appsUX-minded builds

Full-stack delivery

For teams that need delivery across the stack: connect the interface, APIs, data flows, and infrastructure without waiting for separate teams to align.

React / VueTypeScriptAWS

Clarity and rescue

For stalled or hard-to-change systems: untangle technical debt, unblock delivery, and create a pragmatic plan for the next decision.

ArchitectureConsultingAI workflows

Selected work

Software that
moves work forward.

These examples show the kinds of customer-facing products, platforms, and systems I have helped build under real constraints and deadlines.

01 / 04

Customer platform · REWE/Penny Group

A smoother way to run calls for bids.

Built a customer-facing call-for-bids platform and admin panel with real-time calculations and email notifications, bringing a complex process into one manageable workflow.

ReactTypeScriptFirebase

02 / 04

Platform · Propstack (Scout24)

Performance where every interaction counts.

Developed customer-facing CRM applications backed by serverless microservices, keeping everyday interactions responsive as the platform and its data grew.

ReactVueAWSJava / Kotlin

03 / 04

Dashboard · Homelike GmbH

Less friction in the rental journey.

Built an intuitive dashboard for creating and managing rent requests, shaped around the needs of people handling a time-sensitive process.

ReactNode.jsMongoDB

04 / 04

Mobile app · Canilendar

A clear planner for professional dog walkers.

A mobile planner for scheduling pickups, tracking capacity, and avoiding overbooking in a busy daily route.

React NativeExpoMapboxRevenueCat

The way we work

A direct path
to done.

Find the real problem

We clarify the outcome, users, and constraints before writing code.

Build what matters

Short feedback loops keep decisions practical and progress visible.

Ship with confidence

A maintainable release, a clear handover, and a foundation you can grow.

Experience

Enough context
to make good calls.

Eight years of building customer-facing products means I know how to balance speed today with the quality your product needs tomorrow.

2018 — nowRemote · Köln

Freelance Web Developer

Helping clients move from requirements to a deployed, responsive product, including custom websites for the REWE/Penny group.

2021 — 2026Köln

Propstack (Scout24)

Full-stack development for customer-facing applications, serverless AWS microservices, infrastructure as code, and faster CI/CD pipelines.

2018 — 2021Köln

Homelike GmbH

Frontend development for a customer-facing rental dashboard and its request management systems.

Comfortable across the stack

TypeScriptReactVueNode.jsJavaAWS

Let’s talk

Have a product
to move forward?

Tell me what you want to build, where you’re stuck, or what needs to be finished. Include the current situation and the outcome you need; we’ll start from there.

Aaron Weigl, freelance full-stack developer

Email me directlyinfo@aaron-weigl.de