Richard Sedellke

Technical Program Manager · Full-Stack Developer · AI Enthusiast

Düsseldorf, Germany hello@pixelquadrat.com +49 (0)211 30206810 pixelquadrat.com
Technical Program Manager · Full-Stack Developer · AI Enthusiast

Richard
Sedellke

Bridging code and strategy — designing and delivering complex software solutions for 25+ years.

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About Me

Concept. Architecture. Execution.

I am the owner of pixelquadrat GmbH in Düsseldorf, Germany and have been leading and building complex software projects since 2000. My work spans the full spectrum — from hands-on full-stack development in C#/.NET to guiding international teams as technical program manager.

I have a deep background in enterprise software for regulated industries (insurance, pharma), accessibility-compliant web development (WCAG 2.1), business intelligence and agile delivery. I founded three companies and bring both the strategic and technical perspective to every engagement.

25+Years Experience
20+Major Projects
3Companies Founded
7+Years Intl. Teams
Düsseldorf, Germany German · English pixelquadrat GmbH
What I Offer

Services

Software Development

Full-stack development with C#/.NET, JavaScript, HTML5/CSS3. Custom web applications, shop systems, mobile apps (iOS & Android) and database-driven solutions.

Program & Project Management

End-to-end management of complex technology programs. Agile delivery (Kanban), stakeholder management up to executive level, SLA management and vendor coordination.

UX/UI & Frontend

Design and development of responsive, accessible interfaces. WCAG 2.1 (AA) compliance, mobile-first responsive design, prototyping and living style guides.

Database & Business Intelligence

MS SQL Server administration and development. ETL pipelines, SSRS reporting, data warehousing, performance optimization and BI dashboards.

Technical Profile

Skills & Technologies

AI & Generative Intelligence

Claude (Anthropic) Claude Code ChatGPT GitHub Copilot Prompt Engineering AI-Assisted Development Claude Agent SDK LLM Integration

Development

C# / .NET JavaScript TypeScript React / Next.js HTML5 CSS3 / Sass Tailwind CSS jQuery T-SQL Node.js XML / JSON AJAX Bootstrap BEM Web API IIS

Architecture & Cloud

Azure Cloud Azure DevOps Dependency Injection API / Webservices Responsive Design Mobile-First Git / TFS Vite Visual Studio AWS SNS

Database & BI

MS SQL Server SSMS SSIS / ETL SSRS Prisma ORM Data Warehousing Performance Tuning MySQL Oracle

Management & Methods

Agile / Kanban Stakeholder Mgmt SLA Management Requirements Mgmt Vendor Management Make-or-Buy Analysis Workshop Facilitation Budget Responsibility

Standards & UX

WCAG 2.1 (AA) EN 301 549 UX/UI Design SEO / SEM Prototyping Style Guides Usercentrics CMP Accessibility Testing

CRM & Systems

Siebel CRM ARS Remedy helpLine VMware / ESXi DMS / OCR ISAKS nopCommerce
Track Record

Projects

Career

Professional Experience

02/2020 – Present

Owner – pixelquadrat GmbH

Düsseldorf

Custom website and software development (HTML5, CSS3, JavaScript, C#), SEO/SEM, BI development based on MS SQL, responsive design and mobile app development.

01/2012 – 12/2019

Owner – exponde-online

Düsseldorf · Freelance

Freelance projects in new media, web hosting and email services across various clients.

01/2000 – 12/2012

Founder & Managing Partner – help@work GmbH & Co. KG

Düsseldorf

IT services for international pharmaceutical companies. Database development, software development (DMS, CRM, billing systems), helpdesk operations, staff management, sales and SLA negotiations.

1993 – 1999

Civil Engineering Studies

Bergische Universität GH, Wuppertal

Structural Engineering (Bautechnik Konstruktiv II)

Achievements

Awards & Certifications

2nd Place – IT Innovation Award 2010

ISAKS Document Management Software

Certifications & Training

  • Microsoft Reporting Services (SSRS)
  • Easy Enterprise.x – System Administration & Extensions
  • helpLine Administration, System Extensions & Dialog Design
  • Remedy AR System Administration & System Knowledge
  • CNC Programming Basics (Focus: Milling)

Memberships

  • Member – Gesellschaft für Informatik (GI)
  • Member – Software Working Group, IHK Düsseldorf
Let's Talk

Get in Touch

Available for project-based engagements, consulting and software development. Reach out directly.

Phone +49 (0)211 30206810 Email hello@pixelquadrat.com Web pixelquadrat.com