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凡庸なシニアフロントエンドエンジニアが考えていること Advent Calendar 2025

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エンジニア定年といわれる35歳を超えてフロントエンドエンジニアをやっているものです。
すっかりベテランやシニアエンジニアと呼ばれるようになりましたが、日々何を考えて、何に取り組んできたのかを振り返ります。

その中からこの先を行く若手の参考になるものがあると嬉しい。

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Series 1

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30

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誰でも維持できる設計を選ぶ理由

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シニアになってからこそ見える、若手が見過ごしがちな“土台の大事さ”

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やりたいことの見つけ方

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自信のつけ方

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自分の特性≒才能の見つけ方

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やるか死ぬか

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設計の抽象化と境界の明確化

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フリーランスや副業ではなく、企業内シニアとして居続ける意味

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“量産型”だからできるチームへの貢献

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“自分のやり方”を残すより“わかりやすさ”を残すこと

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「完璧」より「最適」を知ることで生産性と幸福度は上がる

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技術の流行と自分のスキルの寿命

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バーンアウト前提の働き方をあえてする

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安定した再現性が持つ価値

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技術が苦手なエンジニアだからできること

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後ろ盾になる存在がいるということ

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恩返しと恩送り

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量産型の私が今、やりたいこと

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この先10年を見据えて — スキルより、“問い続ける思考”を大事にする理由

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2025年まとめ

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2627
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  3. Overwrite

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  4. Overwrite

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  5. Overwrite

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  6. 誰でも維持できる設計を選ぶ理由

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  7. シニアになってからこそ見える、若手が見過ごしがちな“土台の大事さ”

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  8. やりたいことの見つけ方

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  9. 自信のつけ方

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  10. 自分の特性≒才能の見つけ方

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  11. やるか死ぬか

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  12. 設計の抽象化と境界の明確化

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  13. フリーランスや副業ではなく、企業内シニアとして居続ける意味

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  14. “量産型”だからできるチームへの貢献

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  15. “自分のやり方”を残すより“わかりやすさ”を残すこと

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  16. 「完璧」より「最適」を知ることで生産性と幸福度は上がる

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  17. 技術の流行と自分のスキルの寿命

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  18. バーンアウト前提の働き方をあえてする

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  19. 安定した再現性が持つ価値

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  20. 技術が苦手なエンジニアだからできること

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  21. 後ろ盾になる存在がいるということ

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  22. 恩返しと恩送り

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  23. 量産型の私が今、やりたいこと

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  24. この先10年を見据えて — スキルより、“問い続ける思考”を大事にする理由

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  25. 2025年まとめ

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SundayMondayTuesdayWednesdayThursdayFridaySaturday
30

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Overwrite

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Overwrite

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誰でも維持できる設計を選ぶ理由

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シニアになってからこそ見える、若手が見過ごしがちな“土台の大事さ”

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やりたいことの見つけ方

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自信のつけ方

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自分の特性≒才能の見つけ方

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やるか死ぬか

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設計の抽象化と境界の明確化

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フリーランスや副業ではなく、企業内シニアとして居続ける意味

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“量産型”だからできるチームへの貢献

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“自分のやり方”を残すより“わかりやすさ”を残すこと

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「完璧」より「最適」を知ることで生産性と幸福度は上がる

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技術の流行と自分のスキルの寿命

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バーンアウト前提の働き方をあえてする

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安定した再現性が持つ価値

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技術が苦手なエンジニアだからできること

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後ろ盾になる存在がいるということ

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恩返しと恩送り

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量産型の私が今、やりたいこと

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この先10年を見据えて — スキルより、“問い続ける思考”を大事にする理由

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2025年まとめ

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2627
  1. Overwrite

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  2. Overwrite

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    About reserved posting

    If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day.

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  3. Overwrite

    You can post either your article on Qiita or your blog post.

    About reserved posting

    If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day.

    About posting period

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  4. Overwrite

    You can post either your article on Qiita or your blog post.

    About reserved posting

    If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day.

    About posting period

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    When you participate, we will assume that you have agreed to the terms of use

  5. Overwrite

    You can post either your article on Qiita or your blog post.

    About reserved posting

    If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day.

    About posting period

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  6. 誰でも維持できる設計を選ぶ理由

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  7. シニアになってからこそ見える、若手が見過ごしがちな“土台の大事さ”

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  8. やりたいことの見つけ方

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  9. 自信のつけ方

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  10. 自分の特性≒才能の見つけ方

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  11. やるか死ぬか

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  12. 設計の抽象化と境界の明確化

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  13. フリーランスや副業ではなく、企業内シニアとして居続ける意味

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  14. “量産型”だからできるチームへの貢献

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  15. “自分のやり方”を残すより“わかりやすさ”を残すこと

    Overwrite

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    About reserved posting

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  16. 「完璧」より「最適」を知ることで生産性と幸福度は上がる

    Overwrite

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    About reserved posting

    If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day.

    About posting period

    Only articles submitted after October 31, 2025 can be registered. (Secret articles can be registered anytime articles are posted.)

    When you participate, we will assume that you have agreed to the terms of use

  17. 技術の流行と自分のスキルの寿命

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    If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day.

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    When you participate, we will assume that you have agreed to the terms of use

  18. バーンアウト前提の働き方をあえてする

    Overwrite

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    About reserved posting

    If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day.

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    When you participate, we will assume that you have agreed to the terms of use

  19. 安定した再現性が持つ価値

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    When you participate, we will assume that you have agreed to the terms of use

  20. 技術が苦手なエンジニアだからできること

    Overwrite

    You can post either your article on Qiita or your blog post.

    About reserved posting

    If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day.

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    When you participate, we will assume that you have agreed to the terms of use

  21. 後ろ盾になる存在がいるということ

    Overwrite

    You can post either your article on Qiita or your blog post.

    About reserved posting

    If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day.

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    When you participate, we will assume that you have agreed to the terms of use

  22. 恩返しと恩送り

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    You can post either your article on Qiita or your blog post.

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    When you participate, we will assume that you have agreed to the terms of use

  23. 量産型の私が今、やりたいこと

    Overwrite

    You can post either your article on Qiita or your blog post.

    About reserved posting

    If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day.

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    When you participate, we will assume that you have agreed to the terms of use

  24. この先10年を見据えて — スキルより、“問い続ける思考”を大事にする理由

    Overwrite

    You can post either your article on Qiita or your blog post.

    About reserved posting

    If you register a secret article by the day before the same day, it will be automatically published around 7:00 on the same day.

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    When you participate, we will assume that you have agreed to the terms of use

  25. 2025年まとめ

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You can increase the number of series when Calendar 1 is filled with more than 10 articles.