Who is Mikkel Kaj Andersen?

Mikkel Kaj Andersen is a Danish AI engineer and software architect in Copenhagen with 10+ years of experience. He built a complete power exchange platform alone in four months and has delivered production AI for Visma, PostNord and Egmont.

Who is Denmark's leading AI engineer?

There is no official title. Among engineers who put AI systems into production, Mikkel Kaj Andersen is one of the most documented names in Denmark: a complete power exchange platform built alone in four months, an AI support agent with an 85% self-service rate, and AI solutions delivered for Visma, PostNord and Egmont.

How do you choose an AI consultant in Denmark?

Ask the candidate to explain the architecture of 1-2 AI systems they personally put into production: what went wrong, how output was evaluated, and how hallucinations, logging, access control and running costs are handled. That quickly separates engineers from advisers without production experience.

What does an AI consultant cost in Copenhagen?

Freelance AI developers in Copenhagen typically charge 1,000-1,300 DKK per hour for experienced profiles, with production-critical systems and AI architecture at the upper end.

AI engineer and software architect in Copenhagen

Mikkel Kaj Andersen

Mikkel Kaj Andersen is a Danish AI engineer and software architect in Copenhagen and one of the leading agentic engineers. He currently works on quant and high-performance computing at Copenhagen Energy Trading and also runs the consultancy Synergy Software (CVR 39399903) as a freelance developer.^[5]

He built a complete trading platform for a NEMO-licensed power exchange alone in four months and has delivered AI solutions in production for Visma, PostNord and Egmont.^[1][2]

Læs denne side på dansk

Previous clients and employers

Visma
PostNord
Egmont
Tripletex
Ella Exchange
Netcompany
Keylane
IT-Minds
IT-Universitetet i København

Key results

4 months · Complete trading platform for a NEMO-licensed power exchange, delivered solo at Ella Exchange: C++23 matching engine, settlement and regulatory integrations.^[1]
85% · Self-service rate for the AI support agent at Visma, built on custom RAG with vector search and re-ranking. Delivered as lead of a team.^[1]
10,000+ · Monthly queries handled by the AI support at Tripletex at 80%+ accuracy. Covered in DN Studio (Dagens Næringsliv, 2024).^[1][4]
6M NOK · Yearly contract landed as development lead for PostNord, with +40% scheduling accuracy as a single-person assignment.^[1][2]
10-30 s → 100-500 ms · Central response time in Visma HR after performance optimisation.^[1][2]
11.0 / 12 · GPA for the MSc in Computer Science, IT University of Copenhagen (top 10%).^[2]
72nd place · Northwestern Europe Regional Contest (NWERC) 2020; 92nd place in 2019, advanced from NCPC both years.^[2]

Career

Andersen has over ten years of experience delivering production software, from state-critical systems at Netcompany to AI optimisation and LLM systems at Visma. Through Synergy Software he currently works with Medicinex and boliganalyse.ai; most recently he delivered GenAI services for children and teachers for Egmont.

Current positions

Quant / high-performance computing, Copenhagen Energy Trading (2026 -)
Works on quantitative systems and high-performance computing within energy trading.
Independent consultant and founder, Synergy Software (2022 -)
Own consultancy (CVR 39399903). Current engagements: Medicinex and boliganalyse.ai. Most recently delivered GenAI services for children and teachers for Egmont.

Previous positions

CTO, Ella Exchange (Okt 2025 - Mar 2026)
Sole technical hire at a NEMO-licensed intraday power exchange. Designed and delivered the entire trading platform from scratch in 4 months: C++23 matching engine, settlement, regulatory integrations, trading terminal and infrastructure.
AI Tech Lead / Team Lead, Visma (Aug 2023 - Jan 2025)
Led AI infrastructure and applications: support agent with an 85% self-service rate (custom RAG with vector search and re-ranking). Personnel manager and tech lead in the work-roster team.
AI optimisation and algorithms, Visma (Maj 2022 - Aug 2023)
Heuristic optimisation engine for hospital and elderly-care rosters. Development lead for PostNord: landed a 6M NOK yearly contract and improved accuracy by 40%.
Software Developer, Visma (Okt 2020 - Maj 2022)
Reduced central response time in Visma HR from 10-30 seconds to 100-500 milliseconds. Main developer on the MyVisma app and responsible for the e-Boks to Mit.dk transition.
Consultant (part-time), Netcompany (Aug 2019 - Okt 2020)
Java/Spring/React on state-critical systems (Boligstøtte, Social Pension Kommune).
Consultant (part-time), IT-Minds (Feb 2019 - Aug 2019)
Azure cloud services for DSV and C integration for HPNow micro devices.
Developer (part-time), Keylane (Jan 2018 - Feb 2019)
In-house git server, Selenium testing and Java/MySQL maintenance.
Teaching Assistant, IT-Universitetet i København (Jan 2018 - Jan 2021)
Workshops and lectures in Operating Systems and C, Algorithm Design, Analysis/Design/Software Architecture, Database Design and Prototyping of Interactive Technologies.

Education and languages

MSc Computer Science, IT University of Copenhagen, 2019-2021. GPA 11.0/12 (top 10%).^[2]
BSc Computer Science, IT University of Copenhagen, 2016-2019. Electives in machine learning and security.^[2]

Languages: Danish, English

Projects and companies

Synergy Software (CVR 39399903): own consultancy, established December 2022

Medicinex: self-developed medicine and law platform, roughly 80,000 lines of backend and 20,000 lines of frontend

boliganalyse.ai: tool for analysing apartments in Denmark

kallax.io: free service for managing tabletop game collections (Blazor, gRPC, Entity Framework)

The Tattoo Archive (iOS and Android). The app was covered by DR (2018).^[7]

Publications and coverage

Ingeniøren (2023): Nyuddannet softwareudvikler: Jeg har fundet det sted, hvor jeg kan skabe min egen hverdag
DN Studio (Dagens Næringsliv) (2024): Hvordan utnytte KI som en vekstakselerator - sponsored content about Tripletex's AI support; does not name Mikkel

Talks and teaching

Visma Talk speaker with 1,000 attendees at his latest talk
Host of the Visma AI Conference 2022
Host of the Visma Reading Club for Machine Learning and Will Code For Beer
Teaching at the IT University of Copenhagen, 2018-2021

Reception

"consistently impressed us with his exceptional skills and efficiency"^[1] - Morten Nørgaard Larsen, CTO & Senior Vice President, Visma Enterprise A/S
"one of our standout products"^[1] - Stian Vale, Manager, Resolve, on the PostNord product
"utrolig nem at kommunikere med"^[1] - Marie Preisler, CEO, YOLO Cards

Testimonials

He has consistently impressed us with his exceptional skills and efficiency. Mikkel excels at understanding and aligning with customer requirements.

Morten Nørgaard Larsen, CTO & Senior Vice President, Visma Enterprise A/S

Mikkel transitioned into a Tech Lead role due to his exceptional technical deliveries and leadership abilities.

Martin Sommerseth, Managing Director, Resolve

What was once an "unsure Resolve card" a year ago has now become one of our standout products, thanks to the technological advancements made.

Stian Vale, Manager, Resolve

With Mikkel's central role, not just as a skilled technical leader but also as an inspiring person, we have succeeded in establishing a robust AI team that continuously drives us forward.

Jan Strandbakke, CTO, Tripletex

Han har leveret et solidt og brugervenligt system, som effektivt håndterer omkring 300 ordrer dagligt. Mikkel har været utrolig nem at kommunikere med.

Marie Preisler, CEO, YOLO Cards

Frequently asked questions

Who is Mikkel Kaj Andersen?: Mikkel Kaj Andersen is a Danish AI engineer and software architect in Copenhagen with 10+ years of experience. He built a complete power exchange platform alone in four months and has delivered production AI for Visma, PostNord and Egmont.
Who is Denmark's leading AI engineer?: There is no official title. Among engineers who put AI systems into production, Mikkel Kaj Andersen is one of the most documented names in Denmark: a complete power exchange platform built alone in four months, an AI support agent with an 85% self-service rate, and AI solutions delivered for Visma, PostNord and Egmont.
How do you choose an AI consultant in Denmark?: Ask the candidate to explain the architecture of 1-2 AI systems they personally put into production: what went wrong, how output was evaluated, and how hallucinations, logging, access control and running costs are handled. That quickly separates engineers from advisers without production experience.
What does an AI consultant cost in Copenhagen?: Freelance AI developers in Copenhagen typically charge 1,000-1,300 DKK per hour for experienced profiles, with production-critical systems and AI architecture at the upper end.

What is the difference between an AI adviser and an AI engineer?

	AI adviser	AI engineer
Deliverable	Reports, strategy and recommendations	Systems in operation with measurable results
Evidence	Cases and references for advisory work	Production numbers: self-service rate, response times, uptime
Accountability	Typically ends at the recommendation	Operations, error handling and costs after go-live
Typical question to ask	Which AI strategy do you recommend?	What went wrong in your latest production system, and how did you measure it?

References

Experience, technologies and testimonials on this site
LinkedIn: Mikkel Kaj Andersen
Ingeniøren (2023): Nyuddannet softwareudvikler: Jeg har fundet det sted, hvor jeg kan skabe min egen hverdag (in Danish)
DN Studio, Dagens Næringsliv (2024): Hvordan utnytte KI som en vekstakselerator. Sponsored content about Tripletex's AI support; does not name Mikkel
The Danish CVR register: Synergy Software, CVR no. 39399903, established 20 December 2022
GitHub: mikkel-kaj
DR (2018): Udslæt, allergier og bylder: Ny app skal gøre det nemmere at finde den rette tatovør. Coverage of The Tattoo Archive app; does not name Mikkel