Julian Schubert is a Senior Full-Stack Software Engineer and Tech Lead based in Hamburg, Germany, with over 5 years of professional experience building scalable web applications, cross-platform mobile apps, AI-powered platforms, and cloud-native enterprise systems. He specializes in Java, Spring Boot, React, Next.js, TypeScript, React Native (Expo), Azure, Firebase, Docker, Kubernetes, and AI integration (OpenAI, RAG, Vector DB). Available for freelance contracts, consulting, and remote engineering work worldwide.
July 2025 to Present. End-to-end ownership of a cross-platform mobile and web ecosystem for an international EdTech client. Built an offline-first vocabulary trainer with FSRS spaced-repetition algorithm, a video-based lead-gen app, and a performance-driven Next.js marketing site. Technologies: Expo, React Native, Next.js, TypeScript, Firebase, TanStack Query, Zod, Vitest, Cloudflare CDN.
July 2022 to June 2025. Led architecture decisions, engineering standards, and cloud modernisation in the aviation domain. Migrated monolithic systems to microservices on Azure Kubernetes Service (AKS) with Spring Boot. Introduced Infrastructure as Code with Terraform. Achieved 99.9 percent system availability in mission-critical aviation environments. Mentored junior engineers and established coding guidelines.
2023 to 2024. Architected mission-critical booking and integration platforms for Lufthansa Cargo. Owned the smartBooking API, Lufthansa Cargo's primary external booking interface. Reduced partner integration time by 60 percent. Implemented blue-green deployment pipelines for zero-downtime releases.
Microsoft Certified: Azure Developer Associate (AZ-204, 2023)
German (native), English (C1 fluent), Thai (A1 basic)
Email: contact@julianschubert.dev. Website: julianschubert.dev. Location: Hamburg, Germany. Available for remote freelance work worldwide.
Remote Specialist
contact@julianschubert.dev
Senior Full-Stack Engineer with 5+ years of experience in Java, TypeScript, and React — specialising in scalable B2B systems, offline-first mobile apps, and cloud-native architectures. I bridge complex business requirements with robust, maintainable solutions.
A selection of high-impact B2B projects delivered as an independent specialist for international corporate clients.
Lead Engineer (Freelance)
End-to-end ownership of three integrated products for an EdTech startup — offline-first mobile learning app, video-based lead-gen app, and a performance-driven marketing website.
Full-Stack Developer (Freelance)
AI-powered property intelligence platform utilizing RAG and OpenAI to streamline condo research, market analysis, and investment decisions for the Thai real estate market.
Lead Architect (Freelance)
End-to-end development of a cross-platform logistics application.
Senior Developer (Consultancy)
Engineered an automated legal compliance engine for international founders.
Notice: These are independent freelance projects delivered to various corporate clients.
Professional Experience
July 2025 - Present
Full end-to-end ownership of a cross-platform mobile and web ecosystem for an international EdTech client. Sole engineer responsible for architecture, UI/UX, backend, QA, and deployment across three integrated products.
Delivered a performance-driven Next.js marketing site with SEO, analytics funnels, and monetisation
Maintained strict type safety (Zod), high test coverage (Vitest), and clear engineering standards throughout
July 2022 – June 2025
Served as IT Consultant and Tech Lead within the aviation domain at Lufthansa Industry Solutions, driving architecture decisions, engineering standards, and cloud modernisation across the team.
99.9% system availability in mission-critical aviation environments
Reduced MTTR through optimised CI/CD pipelines and proactive Grafana/Prometheus monitoring
2023 - 2024
Architected and operated mission-critical booking and integration platforms for Lufthansa Cargo, enabling real-time air freight booking for global forwarders and digital logistics platforms.
Enabled direct system-to-system bookings for global forwarders
Improved reliability and scalability of externally consumed APIs
Ensured stable operation of revenue-critical booking services
The tools I rely on to build high-performance enterprise software.
Java (Spring Boot)
Backend
TypeScript/Node.js
Backend
React/Next.js
Frontend
React Native/Expo
Mobile
Azure Cloud
Cloud
Docker/Kubernetes
DevOps
GitLab CI/CD
DevOps
Grafana/Prometheus
Monitoring
Playwright/Jest
Testing
Technical Leadership
Leadership
Mentoring & Coaching
Leadership
Problem Solving
Analytical
Agile & Scrum
Process
Domain-Driven Design
Architecture
Code & Arch. Reviews
Quality
Stakeholder Comm.
Communication
Remote Collaboration
Teamwork
Ready to turn ambitious ideas into resilient, production-grade software. Have a project in mind? Let's connect.