Markus Gritsch-Lead Full-Stack Software Engineer
Check rate
Experience
Open-Source Software Engineer & Maintainer
Stealth Startup
Independent, part-time open-source engineering focused on build-time tooling for Next.js, React, MDX, and JavaScript/TypeScript compiler pipelines.
Built next-slug-splitter to optimize content-driven Next.js applications. It analyzes MDX content at build time, resolves component usage, and generates route-specific handlers so pages avoid sharing the full catch-all component bundle.
Created supporting plugins and utilities for scoped MDX transformations, nested component dependency resolution, compile-time refinement, safe ESTree evaluation, and object-graph diffing.
Own architecture, API design, implementation, automated testing, npm publishing, documentation, demos, and performance benchmarking.
Building blocks:
remark-scoped-mdx: Context-aware AST transformations with nested scope isolation, typed component registries, and prop inference.
recma-component-resolver: Dependency-graph analysis and selective component forwarding across nested MDX includes.
recma-static-refiner: Build-time prop extraction, schema validation, derivation, and pruning.
estree-util-to-static-value and object-graph-delta: Safe static evaluation and deterministic, cycle-safe structural diffing.
Tech Stack:
Frameworks: TypeScript · Next.js · React · MDX
Compiler tooling: Unified · Remark · Recma · MDAST · ESTree · ts-morph · esbuild
Competencies: Static analysis · AST traversal and transformation · dependency graphs · code generation · schema validation · route and bundle splitting
Tooling: Vitest · tsup · npm · performance benchmarking
Founder & Full-Stack Software Engineer
Stealth Startup
- GPU-Layer Perceptual Privacy (Independent research / prototype)
- Researched CPU -> GPU render pipelines (Metal/Vulkan/DX, OS compositor)
- Designed a frame-interception layer between apps/CPU/GPU, closing the gap where encryption protects data but not perception
- Built a messenger-style simulator to define pixel-level policies (collapse/mask/overlay) and validated the approach with a first demo: GPU-layer native in-app ad blocking
Lead Full-Stack Software Engineer
DECTRIS
- Developed an integrated software suite analyzing X-ray electron beamline data
- Directed technical strategy and system architecture for web app, backend, and IoT device
- Streamlined the tech stack for faster delivery of high quality features
- Cultivated a learning environment, enhancing team technical skills and proficiency
- MVP for improved data management and collaboration in scientific research
FE - Typescript, React / Hooks, Recoil, Jotai, NextJs, Material-UI, Framer Motion, Styled-Comp, MDX, Remark BE - Java, Graal, Maven, OSGi, Neo4j, GraphQL, OpenAPI, Python CI - Github Actions / Docker AI - Python, PyTouch, Tensorflow
Focus on my software projects and technologies I wanted to learn, for about 24 months started in May 2020
Self Employed
- Experiments: Telling a story about a problem of high abstraction using visual animations to synthesize environmental characteristics and related properties.
- POC: OSGi v7 and 8, OSGi in Docker, OSGi with Graal / Native Image, Neo4j in OSGi.
- OSS: Contribution in various OSS projects e.g. Millipede (large Nextjs app), JClouds, ...
- Babysteps: ML frameworks and OpenAPI. Focal Point: Fn programming.
Software Engineer & Architect (Full Stack)
Münchener Hypothekenbank
- Led a lighthouse project to enable digital transformation in real estate finance
- Developed a web-based application reflecting the entire loan origination process
- Implemented a real-time calculation pipeline to determine crucial figures fully autonomously
- Transformed slow work routines into smart, decision-supported collaborative workflows
- Boosted onboarding experience of new users through reactive cross-application interactions
Founder, Lead Software Engineer & Architect
Millipede
- Developed assistant technologies to enable self-determination in the digital world using Electron, Aries, Karaf, GraphQL, and Vert.x
- Created an API for third-party utilization with REST, Vert.x, and GraphQL
- Automated local and remote backend deployment (Cloud Sync) using Docker and Kitematic
Software Engineer
Privacy Enhancing Technology
- Developed a cloud synchronization application focusing on security and storage abstraction using Spring, Spring-Social, SQL, JPA, Hibernate, NoSQL, and Neo4J
- Implemented distributed communication and coordination middleware with native file system integration using Vert.x and JClouds
- Created a browser extension to embed a secure sharing context into arbitrary digital environments using Vert.x, Restlet, and JAX-RS
Software Engineer
Azureus
- Researched and developed improvements for P2P applications using Java, OSGi (Felix, Equinox), RPC, Maven, Restlet, and JAX-RS
- Improved P2P-based (BitTorrent) data transfer models with client/server architectures and modularized applications
- Modernized user interfaces using PureMVC, Robotlegs, Flex, ActionScript, and Air
- Refactored large, complex applications to share a modularization concept for P2P and DHT (Kademlia)
Software Engineer
KRONES
- Developed a real-time image and pattern recognition system from scratch using MATLAB, Qt, and C/C++
- Improved labeling equipment to avoid cutting marks on PET bottle badges, achieving a recognition rate of 8 m/s and processing 50,000 badges per hour
Industry experience
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Experienced in Information Technology, Manufacturing, and Banking and Finance.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Product Development, Research and Development, Finance, and Strategy.
Summary
A full-stack polyglot software developer with over fifteen years of experience leading, architecting, and implementing, software solutions spanning across web, mobile, and desktop environments.
He has an untameable talent for learning and testing new technologies and practices, developing approaches to tackle challenging problems while delivering superior code and product quality.
He is an agile and programmatic thinker who utilizes and enforces best practices and metrics, is comfortable choosing the best tool for every job, and refines and adopts new processes given by the product's needs. He is a highly knowledgeable and experienced hard-worker, especially when utilizing open source technology within a software project.
A leader by nature, he is a substantial addition to any development team that shares his mentality, stack, and traits. He appreciates a complementary team in which everyone can develop their full potential and stand by the other when things don't go as planned to find a solution together.
Skills
- Fe: Typescript, React, Rsc, Nextjs, Ark, Panda, Tailwind
- Be: Typescript, Dynamodb
- Iot: Rust
- Ci: Github Actions, Docker
- Cloud: Aws, S3, Lambda
- Distributed Architectures
- P2p, Dht (Kademlia)
- Matlab
- Qt
- C/C++
- Distributed Network Protocols
- Edge Computing Architectures
- It Security, Access Control
- Cryptographic Systems, Trust Systems
- Reverse-Engineering Computer Programs
- Simulator: Typescript, React / Rsc, Jotai, Nextjs, Signals, Webgpu, Styled-Comp, Ark, Panda
- Extension / Interceptor / Synthesizer: Rust, Wasm, Python, Frida, Mirror-D
- Ai: Python, Pytouch, Kymatio
- Analytical Engineering
- Prototyping / Clean Code
- Tech Lead
- Team Work
Languages
Education
University of Applied Science (Regensburg)
Computer Science · Regensburg, Germany
Focal areas of focus: Distributed networks and computer systems
Statistics
Experience
Global experience
Expertise
Profile
Frequently asked questions
Have questions? Find more information here.
Markus is based in Oberschneiding, Germany and prefers 100% remote projects.
Markus speaks the following languages: German (Native), English (Advanced).
Markus has at least 12 years of experience. During this time, Markus has worked in at least 7 different roles and for 8 different companies. The average length of individual experience is 1 year and 4 months. Note that Markus may not have shared all experience and actually has more experience.
Based on recent experience, Markus would be well-suited for roles such as: Open-Source Software Engineer & Maintainer, Founder & Full-Stack Software Engineer, Lead Full-Stack Software Engineer.
Markus's most recent position is Open-Source Software Engineer & Maintainer at Stealth Startup.
In recent years, Markus has worked for Stealth Startup, DECTRIS, and Self Employed.
Markus is most experienced in industries like Information Technology, Banking and Finance, and Manufacturing.
Markus is most experienced in business areas like Information Technology, Product Development, and Research and Development. Markus also has some experience in Finance and Strategy.
Markus has recently worked in industries like Information Technology and Manufacturing.
Markus has recently worked in business areas like Information Technology, Research and Development, and Product Development.
Markus attended University of Applied Science (Regensburg) for Computer Science.
Markus is immediately available full-time for suitable projects.
Daily rate distribution
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Average rates for similar positions
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The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 7 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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