The easiest way to counter ad fraud.

Spider ‎‎AF is an ad fraud countermeasure tool. We support ad networks, advertisers, and agencies. We have many happy customers across the digital advertising industry.

Flexible and relaxed work environment

We do not believe in micro management. We highly value independent productivity, so you can do your work however you see as fit! As a team, we will think about the process and framework of achieving our goals together, and the independent tasks you are assigned can be completed however you choose to work on them. Our corporate culture ultimately is about doing what we need to do, and going home early. Working long hours is not a virtue here, we focus on quality over quantity.

The average age of our employees is the early 30’s. Since everyone’s age is close, everyone can talk to each other earnestly and freely. We have no dress code, so clothing, hairstyles, nails, and makeup are completely up to you!


Our diverse office is made up of many different nationalities, and we have offices in both Tokyo and Lisbon. We don’t require any Japanese abilities, and welcome overseas candidates looking to relocate to Tokyo (or Lisbon).

Family friendly

Our CEO has 2 kids of her own, along with many other company members having young families. There is a deep understanding for raising children as well as quality time with family. We have paid parental leave, and many events where children are more than welcome to participate.


Remote Work
  • Work from home up to three days per week
  • Weekends and national holidays are off
  • Paid leave policy as is standard under Japanese law
  • An additional “vacation leave” of 3 consecutive days in addition to normal paid leave
  • New Year holidays
  • Congratulatory and condolence leave
  • Childcare leave
Working Hours
  • 8 hours per day
  • Flextime with core time of 10:00 to 17:00
Relocation Support
  • Visa sponsorship
  • Up to ¥100,000 worth of relocation expenses (conditions apply)

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Developer stories

Eurico is the CTO of Spider Labs, whose ad fraud detection tool handles billions of requests and terabytes of data on a daily basis. The Elixir programming language has been instrumental in helping them reach this scale.

Read his story...