What billing models are available?

Team support can be billed hourly or daily. For a scoped project, we agree on a fixed price, deliverables and acceptance criteria. Extensions are agreed separately before implementation.

Do you sign non-disclosure agreements (NDA)?

A mutual NDA can be agreed before confidential discussions or source-code access. If the engagement involves processing personal data, we clarify the required agreements and technical measures first.

How quickly can we get started?

The start depends on current workload and the scope you need. Share your preferred start, expected duration and days per week. I will then confirm what capacity is available for your project.

SENIOR FULLSTACK DEVELOPER & ARCHITECT

Simon-Daniel März: Senior Fullstack & Architect

In business with ProjectMakers since 2016. Hands-on development, lead engineering and architecture sparring for your project.

You work directly with Simon-Daniel März on hands-on development, technical leadership and architecture decisions. We begin by clarifying your codebase, working practices and required capacity.

Enquire about role & availability View Projects & References

REFERENCES

Selected References & Clients

Zweirad Union / SFM BikesCustom ERP system (JTL/C#), iOS scanner & maintenance contract

Filmpark BabelsbergInteractive visitor software

ApleonaEnterprise facility management API integrations

Our live productsBodySeasons, horizOn, InvoiceSync

Leadership & Senior Experience

Leadership & Senior Engineering Experience

Former Head of Software Development (BCIS IT-Systeme GmbH, 11 developers), certified Software Architect (SOLID, Composite Components), and certified Scrum Master / Product Owner.

Certified software architectSOLID, Composite Components Architecture, system decoupling

Scrum Master & Product OwnerSprint facilitation, backlog refinement, user-story quality

Technology Stack

BackendC# / .NET, Kotlin, Java 23, Spring Boot 3.5, Python, FastAPI, Node.js

FrontendNext.js, React 19, TypeScript, TailwindCSS v4, Angular 21

Mobile & DesktopCapacitor 8 (iOS/Android), PWA, Tauri/Electron

DevOps, Cloud & DBsDocker, Proxmox, Linux, SQLite WAL, MongoDB, PostgreSQL, Cloudflare

Collaboration Models

Tailored to your current project stage.

Team Extension (Senior Fullstack)

Hands-on feature development, bug fixing and code reviews in your team. Remote; days per week and start are agreed based on need and available capacity.

Interim Lead & Architecture Sparring

Guiding engineering decisions, conducting code reviews and mentoring your developers.

Targeted Troubleshooting & Performance

Focused intervention for urgent production issues, latency problems or high-risk migrations.

Scoped project at a fixed price

We agree on a price and acceptance criteria for a jointly defined scope. New requirements and their effect on effort and dates are agreed before implementation.

FAQ

Frequently Asked Questions: Freelance

Details on contracts, NDA and operational workflow.

We agree on the role, access, development environment and initial tasks together. I then work remotely in your communication and engineering tools, with direct coordination, code reviews and a transparent work status.

Enquire about availability for your project

Send me a brief message outlining your stack and planned project timeframe. I will usually get back to you within 24 hours.

Enquire about role & availability