Open to opportunities

Jon Karlsen

@jonkarlsen

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Senior software engineer driving cloud modernization and scalable systems.

South Korea

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What I'm looking for

I seek roles leading cloud modernization and scalable, cost-efficient systems where I can mentor engineers, improve developer workflows, and deliver measurable operational impact in a growth-oriented, collaborative company.

I am a senior software engineer with a track record of taking initiatives from concept to production; I spearheaded a full-scale implementation of a cloud-based document processing system, replacing legacy on-premise infrastructure and achieving a 35% reduction in operational costs.

I evolved an internal monitoring tool into a full-featured, integrated operations suite, freeing around 15 hours per week across departments and improving incident response time by 30%. I also developed internal tooling that reduced average troubleshooting time of operational incidents by 50% and improved system observability.

I focus on building high-velocity, quality-focused teams by codifying technical standards, mentoring junior developers, and formalising workflows based on automated testing, CI/CD, and learning-focused code reviews—efforts that increased team velocity by 3x.

I co-founded Manager Kim’s Korean and lead its technical development while conducting user research to validate core features; I hold a Full-Stack Web Development credential from OpenClassrooms and enjoy balancing product thinking with hands-on engineering.

Experience

Work history, roles, and key accomplishments

Current

Lead Software Engineer

Current

Azets Document Solutions

Jan 2025 - Present (7 months)

Spearheaded full-scale implementation of a cloud-based document processing system, replacing legacy on-prem infrastructure and reducing operational costs by 35%. Evolved an internal monitoring tool into an integrated operations suite that saved ~15 hours/week and improved incident response time by 30% while mentoring the team.

TypeScript AWS Terraform Docker CI CD Observability System Design Team Leadership

Current

Co-Founder

Current

Manager Kim's Korean

Dec 2024 - Present (8 months)

Co-founded a language-learning app focused on structured learning paths and spaced-repetition, leading technical development and architecture while conducting user research. Currently developing an MVP planned for internal testing in 2025.

Product Development Spaced Repetition User Research TypeScript Team Leadership

Software Engineer

Azets Document Solutions

Jun 2022 - Jan 2025 (2 years 7 months)

Initiated and led a Terraform POC for cloud modernisation that projected a 40% cost reduction and secured leadership buy-in for production rollout. Built an internal monitoring tool that halved troubleshooting time and implemented CI/CD and automated testing workflows that tripled team velocity.

Terraform AWS Observability CI CD Automated Testing Infrastructure as Code Python System Design

Software Engineer

LittleFish

Nov 2020 - Jun 2022 (1 year 7 months)

Developed a warehouse management application that reduced order fulfilment time by 10% and migrated an HR app from .NET Framework to .NET Core, increasing request throughput by 5%. Reduced production bugs by 10% and regressions by 25% by moving business logic into C# and adopting automated testing.