Full-stack product engineer / TypeScript · React · Node.js

I turn operational complexityinto reliable products

Product-minded full-stack engineer with end-to-end experience across interfaces, backend services, integrations, databases, infrastructure, and production operations.

Explore my experience Download CV

01 / Profile

Product-minded engineering, from interface decisions to production ownership.

I started building software seriously as a teenager after a collaboration tool my friends and I used for virtual trucking companies in Euro Truck Simulator 2 was discontinued. Instead of accepting the gap, I built a replacement for the community. That experience pulled me into product thinking, real user needs, and the satisfaction of shipping software people actually rely on.

Today, I am a product-minded full-stack engineer specializing in TypeScript, React, Next.js, NestJS, Node.js, and PostgreSQL. I am comfortable taking ownership from requirements and architecture through implementation, deployment, monitoring, and production support. My recent work has centered on e-commerce, internal operations software, integrations, and modernizing business-critical systems without disrupting the people who depend on them.

03 / Journey

Career Timeline

Professional roles, independent products, and credentials—from embedded systems and desktop software to full-stack product ownership and optimization.

Independent Product Track

Dec 2025 – Present

ExperienceProduct Engineering & Optimization

Independent Product Engineer

ShiftIQ · RosterSpec

ShiftIQ and the solver work that became RosterSpec began together. Working directly with a care-service manager, I built ShiftIQ into a post-MVP workforce scheduling product close to pilot readiness. Its reusable scheduling core now continues as RosterSpec, available publicly as an open-source project.

Product stage: Post-MVP
Domain validation: Care-service manager
Planning workflow: Hours → minutes
Current work: Open source

ProjectNov 2025 – Present

Open-Source Release

RosterSpec — Open-Source Scheduling Solver

Open-Source Optimization System

RosterSpec began alongside ShiftIQ as its reusable solver foundation. It is now publicly available on GitHub as an open-source scheduling system for expressing domain requirements as explicit, testable hard and soft constraints, making the constraint-based approach available for others to inspect, use, and extend.

Developed the reusable solver foundation in parallel with ShiftIQ rather than treating optimization as product-specific application logic
Generalized scheduling rules into structured, testable constraints suitable for reuse across workforce-planning scenarios
Added an experimental LLM evaluation harness for exploring language models within structured and verifiable engineering workflows
Published RosterSpec as an open-source project on GitHub

PythonOR-ToolsConstraint ProgrammingLLM Evaluation

ProjectDec 2025 – Apr 2026

Product Build

ShiftIQ — Intelligent Workforce Scheduling Platform

Workforce Scheduling Product

Built around a real care-service scheduling process, ShiftIQ models contracts, absences, vacations, employee preferences, staffing requirements, and configurable hard and soft constraints. Its Python, FastAPI, and OR-Tools solver generates complete candidate schedules in minutes, replacing hours of manual construction with a review-and-adjustment workflow. The product reached post-MVP and near-pilot readiness before rollout was paused because replacing the intended customer's contracted software was not commercially viable.

Translated a care-service manager's real planning process into product requirements and human-centered scheduling workflows
Built employee, contract, absence, vacation, preference, staffing, notification, printing, and schedule review capabilities
Implemented a dedicated Python, FastAPI, and OR-Tools solver for configurable operational constraints and employee preferences
Reached post-MVP and near-pilot readiness before commercial validation revealed that the intended customer's existing vendor contract made switching impractical

Next.jsNestJSPostgreSQLPythonFastAPIOR-Tools

Full-Stack Cruise

Feb 2024 – Jan 2026

ExperienceFull-Time

Sole Full-Stack Engineer, E-Commerce & Operations

Elektrohub

As Elektrohub's sole engineer, I rebuilt and operated a business-critical e-commerce and operations platform, owning product discovery, architecture, integrations, delivery, and production reliability end to end.

Role scope: Sole engineer
Production: 10,000+ orders
Performance: ~80% faster
Largest gain: 10+ min → seconds

Rebuilt the core Laravel and Vue.js platform with NestJS, Next.js, TypeScript, and PostgreSQL to improve maintainability, observability, testing, and future extensibility
Designed a modular connector architecture for four external integrations—Galaxus, JTL Wawi, JTL Fulfillment Network, and Shopify—plus the company's custom B2B commerce platform
Reworked the B2B platform used by more than 20 users into a faster, more responsive React experience focused on search and efficient ordering workflows
Improved important workflows and database operations by approximately 80% on average, with the largest cases falling from more than ten minutes to seconds
Supported reliable processing of more than 10,000 orders through platform improvements, analytics dashboards, automated testing, and operational ownership
Owned infrastructure and production operations across Docker, GitHub Actions, DigitalOcean, Vercel, PostgreSQL, Sentry, backups, releases, and incident response
Gathered requirements directly from employees, management, and B2B customers, then prioritized work by user value, business impact, complexity, and effort
Built an internal LLM-assisted tool for drafting Shopify blog content and shipped adjacent client work using Symfony, PHP, and Vue.js

React (Next.js)Node.js (Nest.js)Vue.jsTypeScriptShopify & Shopify HydrogenPHP (Laravel)DockerTailwindCSS

ProjectNov 2022 – May 2025

Product Excursion

Sparky - Cloud Vehicle Management Platform for Kia & Hyundai EVs

Product Development

I built Sparky to create a better connected-car experience, adding Siri support, widgets, Live Activities, richer drive data, and more flexible climate scheduling.

SwiftUIXCodeNext.jsVercel

ProjectAug 2023 – May 2025

Hardware Detour

NG001 - My improved Kia e-Soul

Software & Hardware Engineering

Alongside the mobile companion app, I started improving the in-car experience itself through a custom ambient lighting system with smart integration into the vehicle.

ArduinoC++CADElectronics

Systems Leg

Aug 2021 – Jan 2024

ExperienceApprenticeship

Software Development Apprentice

Nistech

During an accelerated 2.5-year apprenticeship, I contributed to production desktop software, modernized legacy C# and WPF areas, and completed an IHK final project focused on maintainable data access and responsive UX.

Program: 3 years → 2.5
IHK result: 83 points · Good
Final project: 62 hours
Query work: 5 queries → 1

Modernized established areas of the Qualli.life desktop product using C#, .NET Framework, WPF, XAML, MVVM, Entity Framework, and relational databases
Refactored and migrated application areas from Visual Basic to C#, improved user interfaces, investigated production issues, tested changes, and shipped functionality used by customers
Built an IntelliSense-like autocomplete and syntax-highlighting experience for domain-specific placeholders in document and print templates
Worked on a separate medical data module and contributed to database-backed application logic in a mature production codebase
Redesigned the foundation of the contact module for my IHK final project, including asynchronous loading, permissions, printing, multi-user scenarios, and centralized data access
Reduced one final-project database operation from five queries to one while improving separation of responsibilities and avoiding unnecessary writes

C#WPF.NET

CredentialJan 2024

Qualification Milestone

German IHK Qualification — Software Development

Recognized Vocational Qualification

Completed the standard three-year Fachinformatiker für Anwendungsentwicklung apprenticeship in 2.5 years with 83 points (Good); the qualification corresponds to German and European Qualifications Framework Level 4.

EQF Level 483 points · Good

CredentialMay 2023

Credential Stamp

IBM Full Stack Software Developer Specialization

Professional Certificate

Credential covering full-stack development, cloud foundations, containers, deployment, and modern application architecture.

Full-Stack DevelopmentCloud ComputingServerless ComputingCI/CDMicroservicesReact.jsPythonDjangoGitHubDockerKubernetesDatabases

ProjectDec 2021 – Jun 2022

Reverse-Engineering Stop

ArcticWolf - Reviving old Fortnite builds & live-data logging

Game Modding

I adapted an existing mod to revive a specific older Fortnite build and extended it with live event logging to surface interesting in-game changes.

C++UnrealEngineC#

First Departure

Mar 2019

ExperienceInternship

Embedded Software Developer

Senvion Deutschland

During this engineering internship, I developed microcontroller software, controlled motors, and processed sensor data, gaining an early foundation in hardware-adjacent engineering. The business later became part of Siemens Gamesa.

Embedded Systems

04 / Signature deck

Eight cards. One working stack.

A deliberately small collection of the technologies that define how I build—from typed product surfaces to services, data, and production operations.

Signature deck · First edition08 cards / complete set

LegendaryStack-defining core03

EpicDeep specialism03

RareTrusted utility02

Type Smith

TypeScript

The center of my stack, from product interfaces to services and shared contracts.

Contracts: Explicit
Refactors: Confident
Stack Reach: End-to-End

Runtime Captain

Node.js

Production services, integrations, background work, and full-stack delivery in one ecosystem.

Services: Operational
Integrations: Connected
Runtime: Proven

Route Runner

Next.js

Full-stack React delivery with fast iteration and production focus.

Rendering: Hybrid
Ship Tempo: Fast
SEO: Strong

State Tamer

React

Interactive interfaces built from composable pieces that scale cleanly.

Components: Reusable
State Flow: Clear
UI Depth: High

Service Architect

NestJS

Structured backend systems with proper boundaries and strong defaults.

Modules: Composed
Guards: Active
APIs: Typed

Data Vault

PostgreSQL

Reliable relational modeling for systems that need real structure.

Schemas: Normalized
Queries: Tuned
Integrity: Strict

Container Pilot

Docker

Consistent local and production environments without ritual.

Deploy Units: Portable
Setup Drift: Low
Stacks: Reproducible

Stack Trace Detective

Sentry

Finds issues early and makes production behavior explainable.

Errors: Tracked
Signals: Actionable
Debug Time: Reduced

05 / Outside the editor

Interests & Passions

Travel, aviation, and curiosity keep the work grounded in a much wider world.

日本 (Japan)

Japan began as a place I was curious about and, trip by trip, became somewhere I could imagine building a life. Returning several times allowed me to appreciate more than the obvious highlights: the contrast between Tokyo's energy and its quiet neighborhoods, the regional differences, the food, the design, and the care often visible in everyday experiences. I am now preparing to make Tokyo home and learning the language so I can participate in life there more fully, rather than experience it only as a visitor.

Aviation

Aviation has been a long-running and slightly expensive hobby. I spend a lot of time in Microsoft Flight Simulator, read far too much about aircraft, and can get unreasonably enthusiastic about cabin layouts, engine sounds, and why the A350 is excellent. My YouTube recommendations gave up on showing me unrelated content a long time ago.

Software Development

Software development is the interest that keeps turning into side projects. I like building products that feel simple on the surface and solid underneath, whether that means a web app, mobile app, or a tool for some annoyingly specific problem. I also have a healthy respect for the industry's habit of declaring everything revolutionary right before replacing it six months later.

06 / Travel log

The route continues off-screen.

I have a deep passion for flying and exploring the world. Through my travels, I've had the opportunity to experience different cultures, meet amazing people, and create unforgettable memories. Here's a summary of my flight journeys:

Open my FlightRadar24 summary