Available to hire
I’m David, a versatile software developer with over 9 years of backend experience in Python and AI/ML, as well as .NET Core. I have 5 years of frontend experience using React, Vue, and Angular. Most of my career has been spent freelancing remotely on Upwork, where I’ve built scalable software solutions for startups and companies across healthcare, crypto, gaming, and insurance sectors.
I’m comfortable working across the full stack—from backend APIs and databases to AWS infrastructure and project management. I’m currently seeking a fully remote position where I can continue contributing meaningful work alongside a great team.
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Language
English
Fluent
Icelandic
Fluent
Portuguese
Intermediate
Work Experience
Senior Python | AWS | Full Stack Developer at Upwork
June 1, 2020 - PresentLed backend development for a gaming platform (Volter) using Python (Flask) and AWS, improving CI/CD workflows and reducing outages by 35%. Integrated OpenAI GPT-3.5 API for automating player support tickets and NLP-based tagging to classify user reports and chat content for moderation. Delivered full-stack platforms for a US insurance SaaS (S2R Insurance) and German logistics startup (Truckoo) using Vue.js, React, (Django, Flask), AWS Lambda, and PostgreSQL. Reduced delivery time by 33% and supported $400K+ in client acquisition. Built backend logic for NLP-based document parsing and policy form extraction to speed up claims processing. Architected microservices at a US automation startup (Skan) using FastAPI, Docker, Angular, and AWS EC2, lowering maintenance by 47%. Developed an internal tool using LLM embeddings + vector search (RAG approach) to surface relevant API documentation and onboard new engineers faster. Delivered backend services for a crypto platform and gaming site, inc
Software Developer (Python, .NET) at Kvikna ehf
June 30, 2020 - July 29, 2025Developed healthcare software systems (Expeda, MentisCura) using .NET Core and Python(Flask), Angular, MongoDB improving diagnostic workflows and supporting clinicians across multiple European countries.
Full Stack Developer at TM Software
December 31, 2016 - July 29, 2025Contributed to the development of healthcare software systems, including modules like Expeda and MentisCura, improving diagnostic workflows and clinician support. Built a real-time monitoring dashboard improving equipment data visibility and reducing response times. Delivered a responsive web portal for the Swedish Ski Association improving user engagement and mobile accessibility. Designed and implemented instrument control interface in C#, Oracle streamlining scientific equipment setup and reducing calibration time.
Junior Developer at University of Iceland
June 30, 2016 - July 29, 2025Contributed to nationwide Electronic Medical Record (EMR) platform development using .NET, Python; enhanced system stability through debugging and modernization. Worked closely with product and customer teams to implement changes improving client onboarding. Mentored junior developers, promoting best practices. Built Systems Biology toolbox in Julia to support academic research.
Teaching Assistant at University of Iceland
June 30, 2018 - July 29, 2025Taught Database Systems lab sessions and reviewed coursework in SQLite and Python, helping students master database design and manipulation.
Senior Python | AWS | Full Stack Developer at Upwork
June 1, 2020 - PresentLed backend development for a gaming platform using Python (Flask) and AWS, improving CI/CD workflows and reducing outages by 35%. Integrated OpenAI GPT-3.5 API for automating player support tickets and NLP-based tagging for content moderation. Delivered full-stack platforms for US insurance and German logistics startups, reducing delivery time by 33% and supporting significant client acquisition. Architected microservices using FastAPI, Docker, Angular, and AWS EC2, reducing maintenance by 47%. Built an internal tool with LLM embeddings and vector search to enhance API documentation access and onboarding speed. Developed backend services for crypto and gaming platforms supporting $1.2M transaction volume with 99.8% API stability. Managed 8-10 freelance projects as technical lead, mentoring developers and generating over $200K in earnings.
Software Developer (Python, .NET) at Kvikna ehf
June 30, 2020 - July 29, 2025Developed healthcare software systems using .NET Core and Python (Flask), Angular, MongoDB, improving diagnostic workflows and supporting clinicians across multiple European countries.
Full Stack Developer at TM Software
December 31, 2016 - July 29, 2025Delivered a real-time monitoring dashboard using Next.js, Node.js, and MySQL, enhancing equipment data visibility and reducing field response times by nearly 30%. Built responsive web portal for Swedish Ski Association, leading to a 3× increase in user engagement and improved mobile access. Designed and implemented SkyControl, a C# and Oracle instrument control interface streamlining scientific equipment setup, reducing calibration time by 40%.
Junior Developer at University of Iceland
June 30, 2016 - July 29, 2025Contributed to nationwide Electronic Medical Record platform development with .NET and Python, improving physician workflows and reducing entry errors. Diagnosed and resolved legacy healthcare codebase issues, enhancing stability and reducing support tickets by 35%. Modernized components using Python for better maintainability and performance. Collaborated with product teams to implement change requests using .NET, Python, React, and PostgreSQL, accelerating client onboarding by 25%. Mentored junior developers, promoting best practices and improving code quality. Built Systems Biology toolbox in Julia to support academic cellular modeling research.
Teaching Assistant at University of Iceland
June 30, 2018 - July 29, 2025Taught Database Systems lab sessions and reviewed coursework in SQLite and Python, supporting students in mastering relational design and data manipulation.
Senior Python | AWS | Full Stack Developer at Upwork
June 1, 2020 - PresentLed backend development for a gaming platform using Python (Flask) and AWS, improving CI/CD workflows and reducing outages by 35%. Integrated OpenAI GPT-3.5 API for automating player support tickets and NLP-based tagging for moderation. Delivered full-stack platforms for US insurance and German logistics startups using Vue.js, React, Django, Flask, AWS Lambda, and PostgreSQL. Reduced delivery time by 33% and supported $400K+ in client acquisition. Architected microservices at a US automation startup using FastAPI, Docker, Angular, and AWS EC2, lowering maintenance by 47%. Developed internal tools using LLM embeddings and vector search to accelerate new engineer onboarding. Delivered backend services for crypto and gaming platforms supporting over $1.2M transaction volume with 99.8% API stability. Led 8-10 freelance projects as technical lead, mentoring developers and managing delivery, generating over $200K earnings and long-term client relationships.
Software Developer (Python, .NET) at Kvikna ehf
June 30, 2020 - July 29, 2025Developed healthcare software systems using .NET Core, Python (Flask), Angular, and MongoDB to improve diagnostic workflows and support clinicians across Europe.
Full Stack Developer at TM Software
December 31, 2016 - July 29, 2025Built real-time monitoring dashboards improving equipment data visibility and reducing field response times by 30%. Delivered responsive web portals leading to tripled user engagement. Designed and implemented instrument control interfaces streamlining scientific equipment calibration, reducing time by 40%.
Junior Developer at University of Iceland
June 30, 2016 - July 29, 2025Contributed to nationwide Electronic Medical Record platform development using .NET and Python with RabbitMQ messaging, improving physician workflows and reducing errors. Diagnosed and resolved issues in legacy healthcare systems, modernized components, and shortened client onboarding. Mentored junior developers, promoting coding best practices and CI/CD. Built systems biology toolbox in Julia for academic research.
Teaching Assistant at University of Iceland
June 30, 2018 - July 29, 2025Taught Database Systems lab sessions and reviewed coursework in SQLite and Python, supporting students to master relational design and data manipulation.
Senior Python | AWS | Full Stack Developer at Upwork
June 1, 2020 - PresentLed backend development for a gaming platform (Volter) using Python (Flask) and AWS, improving CI/CD workflows and reducing outages by 35%. Integrated OpenAI GPT-3.5 API for automating player support tickets and NLP-based tagging to classify user reports and chat content for moderation. Delivered full-stack platforms for US insurance SaaS and German logistics startup using Vue.js, React, Django, Flask, AWS Lambda, and PostgreSQL, reducing delivery time by 33% and supported $400K+ in client acquisition. Architected microservices at a US automation startup using FastAPI, Docker, Angular, AWS EC2, lowering maintenance by 47%. Developed an internal tool using LLM embeddings and vector search to surface relevant API documentation and onboard engineers faster. Delivered backend services for crypto platform and gaming site supporting $1.2M+ in transaction volume with 99.8% API stability. Led 8-10 freelance projects as technical lead, managing delivery and mentoring developers with over $200K
Software Developer (Python, .NET) at Kvikna ehf
June 30, 2020 - July 29, 2025Developed healthcare software systems (Expeda, MentisCura) using .NET Core and Python (Flask), Angular, MongoDB improving diagnostic workflows and supporting clinicians across multiple European countries.
Full Stack Developer at TM Software
December 31, 2016 - July 29, 2025Built a real-time monitoring dashboard using Next.js, Node.js, MySQL improving equipment data visibility and reducing field response times by nearly 30%. Delivered a modern, responsive web portal for the Swedish Ski Association increasing user engagement threefold. Designed and implemented SkyControl in C# and Oracle for scientific equipment setup, reducing calibration time by 40%.
Junior Developer at University of Iceland
June 30, 2016 - July 29, 2025Contributed to development of nationwide Electronic Medical Record platform using .NET and Python (Flask, Django) with RabbitMQ, improving physician workflows and reducing entry errors. Diagnosed and resolved hundreds of issues in legacy healthcare codebases enhancing stability and reducing support ticket volume by 35%. Mentored junior developers, promoted best practices across Git, CI/CD, and unit testing, boosting code quality and review speed. Built a Systems Biology toolbox in Julia for academic research in cellular modeling and simulation.
Teaching Assistant at University of Iceland
June 30, 2018 - July 29, 2025Taught Database Systems lab sessions and reviewed coursework in SQLite and Python, supporting students in mastering relational design and data manipulation.
Senior Python | AWS | Full Stack Developer at Upwork
June 1, 2020 - PresentLed backend development for a gaming platform using Python (Flask) and AWS, improving CI/CD workflows and reducing outages by 35%. Integrated OpenAI GPT-3.5 API for automating player support tickets and NLP-based tagging for moderation. Delivered full-stack platforms for US insurance SaaS and German logistics startups using Vue.js, React, Django, Flask, AWS Lambda, and PostgreSQL, reducing delivery time by 33% and supporting over $400K in client acquisition. Architected microservices for a US automation startup using FastAPI, Docker, Angular, and AWS EC2, lowering maintenance by 47%. Developed internal tools leveraging LLM embeddings with vector search to improve API documentation accessibility. Delivered backend services for crypto platforms including wallet integration and third-party APIs with 99.8% API stability. Led 8-10 freelance projects as a technical lead, managing delivery and mentoring developers, resulting in over $200K in earnings and lasting client relationships.
Software Developer (Python, .NET) at Kvikna ehf
June 30, 2020 - July 31, 2025Developed healthcare software systems using .NET Core, Python (Flask), Angular, and MongoDB, improving diagnostic workflows and supporting clinicians across multiple European countries.
Full Stack Developer at TM Software
December 31, 2016 - July 31, 2025Developed and maintained numerous software solutions including a real-time monitoring dashboard using Next.js, Node.js, and MySQL, improving equipment data visibility and reducing response times by nearly 30%. Delivered a modern responsive web portal for the Swedish Ski Association that tripled user engagement and improved mobile accessibility. Designed and implemented scientific equipment control interfaces in C# and Oracle, reducing calibration time by 40%.
Junior Developer at University of Iceland
June 30, 2016 - July 31, 2025Contributed to nationwide Electronic Medical Record platform development using .NET and Python, improving physician workflows and reducing entry errors. Diagnosed and resolved issues in legacy healthcare codebases, enhancing stability and maintainability. Mentored junior developers and promoted best practices, improving code quality and review speed. Built Systems Biology toolbox in Julia to support academic research.
Teaching Assistant at University of Iceland
June 30, 2018 - July 31, 2025Taught Database Systems lab sessions and reviewed coursework in SQLite and Python, supporting students in mastering relational database design and data manipulation.
Senior Python | AWS | Full Stack Developer at Upwork
June 1, 2020 - PresentLed backend development for various platforms including gaming, insurance SaaS, logistics startups, automation startups, crypto platforms, and gaming sites using technologies like Python, Flask, FastAPI, Django, Vue.js, React, AWS, Docker, and more. Improved CI/CD workflows, reduced outages by 35%, lowered maintenance by 47%, and supported transaction volumes over $1.2M with high API stability. Managed and mentored freelance teams leading to significant earnings and sustained client relationships.
Software Developer (Python, .NET) at Kvikna ehf
June 30, 2020 - July 31, 2025Developed healthcare software systems using .NET Core, Python (Flask), Angular, and MongoDB to improve diagnostic workflows and support clinicians across Europe.
Full Stack Developer at TM Software
December 31, 2016 - July 31, 2025Contributed to development of electronic medical record platform using .NET and Python frameworks, improving physician workflows and reducing entry errors. Diagnosed and resolved legacy code issues, modernized components, and built real-time monitoring dashboards and responsive web portals. Mentored junior developers and enhanced code quality and review speed.
Junior Developer at University of Iceland
December 31, 2015 - July 31, 2025Developed nationwide Electronic Medical Record platform using .NET and Python, improved system stability, implemented client change requests, and mentored junior developers.
Teaching Assistant at University of Iceland
June 30, 2018 - July 31, 2025Taught Database Systems lab sessions, reviewed coursework in SQLite and Python, supporting students to master relational design and data manipulation.
Education
Bachelor's Degree at University of Iceland
January 1, 2014 - December 31, 2016Bachelor's Degree at University of Iceland
January 1, 2009 - December 31, 2014Bachelor's Degree at University of Iceland
January 1, 2014 - December 31, 2016Bachelor's Degree at University of Iceland
January 1, 2009 - December 31, 2014Bachelor's Degree at University of Iceland
January 1, 2014 - December 31, 2016Bachelor's Degree at University of Iceland
January 1, 2009 - December 31, 2014Bachelor's Degree at University of Iceland
January 1, 2014 - December 31, 2016Bachelor's Degree at University of Iceland
January 1, 2009 - December 31, 2014Bachelor's Degree at University of Iceland
January 1, 2014 - December 31, 2016Bachelor's Degree at University of Iceland
January 1, 2009 - December 31, 2014Bachelor's Degree at University of Iceland
January 1, 2014 - December 31, 2016Bachelor's Degree at University of Iceland
January 1, 2009 - December 31, 2014Qualifications
AWS Partner : Accreditation (Technical)
January 11, 2030 - July 29, 2025AWS Certified Cloud Practitioner
January 11, 2030 - July 29, 2025AWS Partner : Accreditation (Technical)
January 1, 2020 - December 31, 2020AWS Certified Cloud Practitioner
January 1, 2020 - December 31, 2020AWS Partner : Accreditation (Technical)
January 11, 2030 - July 29, 2025AWS Certified Cloud Practitioner
January 11, 2030 - July 29, 2025AWS Partner : Accreditation (Technical)
January 11, 2030 - July 29, 2025AWS Certified Cloud Practitioner
January 11, 2030 - July 29, 2025AWS Partner: Accreditation (Technical)
January 11, 2030 - July 31, 2025AWS Certified Cloud Practitioner
January 11, 2030 - July 31, 2025AWS Partner: Accreditation (Technical)
January 11, 2030 - July 31, 2025AWS Certified Cloud Practitioner
January 11, 2030 - July 31, 2025Industry Experience
Software & Internet, Healthcare, Gaming, Financial Services, Transportation & Logistics
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
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