
Senior Software Developer | Systems · Integrations · Automation · AI
Daniel S. Nielsen.
Available nowProfile
Software developer with 15+ years of experience building the systems a business actually runs on. I have built business systems from scratch: commission calculation, invoicing and finance integration, learning analytics with churn prediction, and my own operations platform. My strength is taking a task all the way from business need to production.
Day to day I work with Laravel, API integrations, event-driven queues and OAuth2, and I build LLM solutions with RAG and AI agents. I use AI myself in development with Claude Code, Codex and Copilot, and responsible AI use and data governance are a fixed part of how I work. Add to that Linux operations, CI/CD and automated testing.
At GoLearn I was technically responsible for internal systems and operations on a learning platform with tens of thousands of users, and for the migration to Eduhouse LMS following the 2023 acquisition, completed with close to zero downtime. I also co-founded CustomerFlow, an AI-driven SaaS product I run as a part-time project, and through Kodesmeden I help companies with custom development, integrations and technical advisory.
I am now looking for a permanent position where I can put down roots and take ownership of the systems. A place where technical quality carries weight, and where what we build lasts.
Experience
Co-founder & Technical Lead
Dec 2025 - PresentCustomerFlow · Part-time project
Co-founder and technically responsible for an AI-driven SaaS product for sales communication, which analyses calls and emails via DISC profiling and generates tailored response suggestions.
- Responsible for the entire technical architecture: backend, real-time dashboard, AI analysis pipeline and email integration.
- Built a built-in softphone (WebRTC) with call recording and transcription.
- Built the solution GDPR compliant and hosted in the EU, with data governance and responsible use of AI built into the architecture.
- Live with the first pilot users.
Lead Developer
Jun 2022 - Sep 2026GoLearn.dk · Ballerup
Technically responsible for internal systems and operations on a digital learning platform with tens of thousands of users. The role was eliminated in 2026 when the Danish office was closed and its functions consolidated in Finland following the acquisition. I am available to start immediately.
- Built an internal toolbox for managing instructors, courses and statistics, with automatic commission calculation based on consumption within categories.
- Built the finance and invoicing layer in the same system, connecting Maxio (subscription management) and e-conomic (invoicing). After go-live, manual work in the finance function went from a full-time role to roughly one day a week.
- Extended the platform's learning analytics system for end customers with automatic user provisioning and churn prediction.
- Technically responsible for the migration to Eduhouse LMS following the acquisition in 2023, carried out with close to zero downtime via gradual rollout and parallel operation.
- Designed data mapping between two data models and built custom migration scripts so that data from two systems could be merged without loss.
- Coordinated across the two teams and kept day-to-day operations running throughout the entire transition.
- Responsible for server operations, Linux administration, CI/CD and automated testing.
Full Stack Developer
May 2021 - Jun 2022GoLearn.dk · Ballerup
Backend and frontend development on GoLearn's digital learning platform.
- Developed features across the stack on a platform with many users.
- Built API integrations and technical analysis tools.
Independent Developer & Technical Advisor
Apr 2021 - PresentKodesmeden · Side business · Dianalund
Independent developer and technical advisor. Helps companies with custom development, integrations, automation and server setup.
- Custom development and technical advisory for clients ranging from entrepreneurs to IT suppliers and consultancies.
- Integrations with accounting systems, CRM and PIM.
- Built my own operations platform combining bookkeeping integration between Stripe and Dinero, licence management for my own plugins, server and application management, monitoring and backups.
- Develops own products under Signocore (WordPress plugins and dev tools).
WordPress Developer
Feb 2021 - Apr 2021Peytz & Co
Shorter engagement involving custom WordPress development for an agency.
- Custom adaptations and maintenance of WordPress solutions for the agency's clients.
Lead Developer
Jun 2018 - Jan 2021Waimea Digital · Hellerup
Promoted to technical lead with responsibility for code quality and technical direction in the development team.
- Mentored 3-5 junior developers through pair programming and on-the-job training, helping them progress from junior towards independence.
- Introduced shared standards and best practices for the team's code quality.
- Responsible for the architecture and development of client solutions in PHP and WordPress with API integrations.
PHP Developer
Dec 2016 - Jun 2018Waimea Digital · Hellerup
Backend development in PHP for a digital agency.
- Built tailor-made WordPress and PHP solutions for business customers.
Full Stack Developer
Jun 2013 - Sep 2016OnlinePlus
Development of websites, intranet systems and integrations with accounting systems for business customers.
- Full-stack development from frontend to backend, including integrations with accounting systems.
Freelance Web Developer
Jan 2010 - May 2013Various clients · Freelance
WordPress websites and smaller web solutions for local businesses.
Education
Web Integrator
Jan 2011 - Sep 2012Syddansk Erhvervsskole · Web development
Completed with the top grade of 12 throughout the entire programme - from the foundation programme to the main programme and the final journeyman's project.
Projects
CustomerFlow
AI-driven SaaS for sales teams that analyses calls and emails via DISC profiling and suggests tailored responses. Built-in softphone (WebRTC) with recording and transcription, a real-time dashboard and an LLM analysis pipeline. GDPR compliant and hosted in the EU.
HoldTurnering
Free platform for Danish table tennis clubs that gathers matches, standings and statistics in one place with automatic synchronisation. Used by 336+ clubs with 1,400+ teams and 4,600+ players, and sends match reminders via email and SMS.
DNSinfo
Free Danish toolbox for DNS, email and domains with 12+ tools (DNS lookup, Whois, SPF, DMARC, blacklist, BIMI and SSL/TLS) as well as DNSinfo Monitor for automatic domain monitoring.
Signocore
Platform for WordPress plugins and developer tools with a focus on performance, technical SEO and automation. Signocore SEO combines schema markup, IndexNow integration and AI-based content analysis in a single plugin.
References
Rasmus Winkel
COO · GoLearn
Martin Birch Laursen
Managing Director · GoLearn