fuidama

fuidama — independent since 2013

Backend systems, AI workflows, and cloud infrastructure.

I'm Johan Strandberg, a senior software engineer with sixteen years of experience in backend development, cloud infrastructure and AI systems. Work has included technical leadership, cloud architecture and consulting roles in Gothenburg, Stockholm, Beirut and Tokyo.

Tokyo, Japan · UTC+9 · Swedish, English, Japanese

01 — Selected clients

Google Sweden · Volvo Cars · Absolut · Amazon Marketplace Japan · Sodexo

02 — What I do

01

Backend and APIs

  • HTTP APIs with typed contracts, versioning, and generated clients
  • Data modelling, migrations, and query performance
  • Background jobs, queues, and scheduled pipelines
  • Automated test suites and CI
  • Logging, metrics and tracing for production systems
  • Backend platforms in Python, Go, Java and C#, including banking integrations for money transfer and bill payment
02

AI workflows

  • Multi-step agent and tool-use pipelines
  • Structured outputs with schema validation and repair on failure
  • Evaluation steps for prompts and pipelines
  • Semantic search and vector retrieval
  • Observability for LLM systems — tracing, cost and latency
  • Agentic workflows in LangChain and LangGraph, including internal tooling used by a team of several hundred engineers
03

Cloud infrastructure

  • Containerised services with reproducible builds
  • Infrastructure as code — Terraform/OpenTofu, CloudFormation
  • Identity, access and security configuration
  • CI/CD pipelines with tested rollback
  • Logging, monitoring and observability
  • Runbooks and handover documentation
  • Production infrastructure across AWS, GCP and Azure

03 — How I work

  • Documentation and written rationale for significant decisions as part of project delivery, including handover materials and phasing out legacy code
  • Based in Tokyo (UTC+9); experience with remote and distributed teams across timezones, including five years leading a distributed team
  • Experience spanning both system architecture and infrastructure operations
  • Experience hiring, onboarding and leading engineering teams and mentoring new graduates

04 — About

I founded Fuidama in 2013 in Gothenburg. Since then, my roles have included co-founder and CTO of a banking platform in Beirut, software development manager in Stockholm, consultant in Tokyo, and most recently technical lead and software engineer building AI systems in Japan.

05 — Contact

Get in touch

If something here is relevant to what you're working on, I'm reachable by email.