Markus Kunkel-Senior Full-Stack Engineer / Cloud Systems Architect
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Experience
Senior Full-Stack Engineer / Cloud Systems Architect
Bernd Linder
Self-employed since 2008 in planning, developing, and supporting custom software, web, and system solutions for clients as well as my own projects.
Complete technical implementation of projects — from requirements analysis and architecture to programming, release, maintenance, and further development.
Development of database-driven web applications, customer portals, admin interfaces, ordering processes, user and permission management, and custom backend functions.
Design and development of REST APIs, webhooks, microservices, and interfaces to reliably connect different applications and external services.
Implementation of numerous smaller services and automations for data processing, monitoring, notifications, recurring tasks, and technical business processes.
Development of Telegram bots with the Telegram Bot API, including automated notifications, user interactions, status queries, and control of technical workflows.
Programming native Android applications in Java as well as developing my own games and interactive applications with Unity.
Development, extension, and modernization of existing PHP, Java, JavaScript, and MySQL applications, including error analysis, performance optimization, and adaptation of grown codebases.
Setup and support of Linux-based server environments with Apache and Nginx, as well as management of databases, domains, DNS, SSL certificates, email services, access rights, and backups.
Development of browser-based automations with Selenium for data collection, checking, and processing of recurring workflows, reducing manual steps and making processes more reliable.
Independent implementation of complete platforms and web projects, including devpraxis.de, hq-smm.com, and socialboost24.com.
Many years of technical project support with responsibility for troubleshooting, maintenance, further development, documentation, and stable operation of production systems.
Quick onboarding into existing applications and unfamiliar codebases to analyze technical problems in a structured way and implement practical, long-term maintainable solutions.
Direct coordination with clients, clear explanation of technical topics, and independent implementation of agreed requirements.
By combining software development, automation, and system administration, many tasks can be handled completely from a single source, which reduces coordination effort, technical dependencies, and processing time.
Self-employed IT, software, and web developer
Self-employed IT, software, and web developer
Own applications, freelance client projects, and long-term technical project work
- Planning and independent implementation of custom web applications, platforms, backend services, admin interfaces, and technical tools.
- Development, maintenance, and modernization of production systems with PHP, Java, JavaScript, Node.js, SQL, REST interfaces, webhooks, and Selenium.
- Design of data models, databases, interfaces, microservices, and automated workflows, as well as integration of external services and APIs.
- Setup and ongoing operation of Linux-based web, database, and application systems including DNS, email, SSL/TLS, monitoring, security, and backups.
- Direct coordination with clients, analysis of business and technical requirements, error analysis, clear documentation, and continuous development.
- Continuous technical collaboration with a long-term client since 2014; complete planning and implementation of several platforms, web applications, microservices, and admin systems.
Industry Experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology and Professional Services.
Business Area Experience
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Experienced in Information Technology, Operations, and Product Development.
Summary
Technical support pro (email, chat, ticket) with a developer background
Hello! As a full-stack developer and founder of my own cloud and API platform, I understand web applications, APIs, hosting, and DNS structures down to the smallest detail. Instead of just following a script, I get to the root of problems right away.
My strength is analyzing complex technical issues at lightning speed and explaining them to end customers in a way that is clear, empathetic, and focused on solutions via email or chat.
I am looking for long-term support assignments (first-level / tech support) for SaaS, web, or hosting products where technical thinking and excellent, reliable customer communication are needed.
Skills
Technical Support & Customer Communication
- First-Level Support (Email, Chat, Ticket Systems)
- Technical Error Analysis (Troubleshooting & Log Analysis)
- Empathetic, Clear, And Customer-Focused Communication
- Creating Help Pages And Documentation (Self-Service)
- Resolving Api, Login, And System Issues At The User-Facing Interface
Specialization & It Infrastructure
- Cloud Hosting & Server Structures (Lxc Containers, Kvm Virtualization)
- Web Technologies & Web Infrastructure (Dns Management, Domains, Webhooks)
- Email Infrastructure & Security (Interfaces, Spf, Dkim, Dmarc)
- Api-First Systems & Saas Architectures
- Database Structures & Data Flows (Workflows & Queues)
What Sets Me Apart As A Developer Who Built A Complete Cloud And Hosting Platform On My Own, I Read And Understand Technical Problems Like A Programmer, But I Communicate Them In A Way That Is Clear And Approachable, Like An Experienced Support Pro. I Get Up To Speed On New Software Solutions Extremely Quickly, Work Absolutely Reliably, And Make Sure Your Customers Feel Well Taken Care Of Both Technically And Personally.
Languages
Education
Auenschule
School attendance without graduation · Schweinfurt, Germany
Statistics
Experience
Global Experience
Expertise
Profile
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Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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