機械学習とのつきあいかた / How to get involved with Machine Learning @ Wantedly

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ػցֶशͱͷ͖͍͔ͭ͋ͨ @Wantedly New Grad Training 2019 April 24, 2019 -
Makoto Tanji (@tan-z-tan)

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©2019 Wantedly, Inc. • ML Engineer at Wantedly, Inc. •
Wantedly Visit 2015 - 2016 • Client Growth, Scout • Wantedly People 2016 - current • Server side • Machine Learning • Data Analysis ࣗݾ঺հ Who am I? Makoto Tanji

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©2019 Wantedly, Inc. ࠓ೔࿩͢͜ͱ

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©2019 Wantedly, Inc. 1. ςʔϚ 2. Wantedlyͷػցֶश 3. Take home
messages 1. MLͱ૊৫ 2. MLͱσʔλ 3. MLϓϩδΣΫͷਐΊํ 4. ·ͱΊ Contents

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©2019 Wantedly, Inc. ϝσΟΞʹࡌΔΑ͏ͳ࠷৽ٕज़ͷػցֶशͷ׆༻͸՚΍͔Ͱ͕͢ɺ࣮ӡ༻ ͷͨΊʹ͸࣮ࡍ͸๲େͳσʔλ͕ඞཁͩͬͨΓɺਫ਼౓͕ग़ͳ͔ͬͨΓɺ҆ ఆͨ͠ӡ༻͕೉͍͠ͱݴ͏ࠔ೉΋ଘࡏ͠·͢ɻ 8BOUFEMZͷ.-ΤϯδχΞ͸ɺ8&#ΤϯδχΞɾσʔλαΠΤϯςΟε τɾΠϯϑϥͱڠಇ͠ͳ͕Β͜ͷ໰୊ʹऔΓ૊ΜͰ͍·͢ɻ ·ͨকདྷ8&#ΤϯδχΞ΋ΠϯϑϥΤϯδχΞ΋ػցֶशͱԿΒ͔ͷܗͰ ؔΘΔ͜ͱ͕ࠓΑΓ΋૿͖͑ͯ·͢ɻ
8BOUFEMZͰ࣮ࡍʹಈ͍͍ͯΔػցֶशΛݟͳ͕Βػցֶशͱͷ͖͍ͭ͋ ͔ͨΛߟ͑ͯߦ͖·͠ΐ͏ɻ ςʔϚ

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©2019 Wantedly, Inc. શମతʹػցֶशʹ·ͭΘΔϙΤϜͰ͢

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©2019 Wantedly, Inc. Wantedlyͷػցֶश׆༻ࣄྫ Machine Learnings working at Wantedly

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©2019 Wantedly, Inc. Wantedlyͷػցֶश׆༻ࣄྫ

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©2019 Wantedly, Inc. Wantedlyͷػցֶश׆༻ࣄྫ 7JTJU w ืूͷਪન w 1VTI௨஌ͷύʔιφϥΠζ
w εΧ΢τϑΟϧλͷվળ w ʜ 1FPQMF w ໊ࢗը૾ͷ0$3ͱ෼ྨ w ਓͷਪન w هࣄͷਪનɺ1VTIͷ։෧཰༧ଌ w ༷ʑͳݻ༗දݱநग़ w ʢػցֶशͷϦϙδτϦ͸.-λά͕͍ͭͯ·͢ʣ w IUUQTHJUIVCDPNXBOUFEMZ VUG&$RNMUZQFMBOHVBHF

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©2019 Wantedly, Inc. ͳͥػցֶशΛಋೖ͢Δͷ͔ʁ

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©2019 Wantedly, Inc. Wantedlyͷػցֶश׆༻ࣄྫ ఏڙ͍ͨ͠Ձ஋͕͋Δ͔Β • εΩϟϯ͔Β਺ඵͰσʔλԽͱ͍͏ମݧΛఏڙ͍ͨ͠ w ໊ࢗΛຕຕ࿈བྷઌʹҠ͢ͷਏ͍ˠͦΕਓؒͷ࢓ࣄ͡Όͳ͍Ͱ͢ɻΧϝϥͰࡱͬͨΒҰ౓ʹσʔλԽ
• ίίϩΦυϧγΰτʹग़ձ͏ମݧΛఏڙ͍ͨ͠ w ͳΜ͔͍͍࢓ࣄͳ͍͔ͳʁˠ͋ͳ͕ͨڵຯ͕͋Γͦ͏ͳืू͔ΒࣗಈͰਪન͠·͢Α

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©2019 Wantedly, Inc. ࣾ಺Ͱಈ͍͍ͯΔ.-ͷߏ੒ྫ

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©2019 Wantedly, Inc. ࣾ಺Ͱಈ͍͍ͯΔMLͷߏ੒ྫ ֶशࡁΈͷ"1*ύλʔϯ ਪનύλʔϯ ͦͷଞ

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©2019 Wantedly, Inc. ֶशࡁΈͷAPIύλʔϯ ϚΠΫϩαʔϏεͷαʔόͷ"1*ͱͯ͠ఏڙ 1. OCRʢจࣈೝࣝʣAPIɺςΩετ͔Βͷநग़APIɺಉҰੑ൑ఆAPIͳͲ୔ࢁ 2. લ΋ֶͬͯशͨ͠ϞσϧΛಈ͔ͯ݁͠ՌΛฦ͢
3. e.g. Peopleͷ໊ࢗೝࣝؔ࿈API͸͜ͷྫ͕ଟ͍ ߟ͑Δ͜ͱ • ਫ਼౓͕஌Βͳ͍͏ͪʹམ͍ͪͯͳ͍͔ • ϝτϦΫεΛຖ೔औΔɻ৽͘͠APIΛ࡞Δͱ͖͸νΣοΫϦετʹೖΕΔ • ίετ • CPU཯଎ʹͳ͍ͬͯΔ͜ͱ͕ଟ͘ɺkubernetesͷϦιʔεΛେྔʹ࢖ͬͯͳ͍͔

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©2019 Wantedly, Inc. ਪનύλʔϯ લ΋͓ͬͯ͢͢ΊείΞΛܭࢉɾఏڙ 1. Ϣʔβ͕ϖʔδʹΞΫηεͨ͠ͱ͖ʹҰॠͰΦεεϝͷืूΛग़͍ͨ͠ 2. Ϣʔβͷաڈͷߦಈ͔Βࣄલʹܭࢉ͓ͯ͘͠
3. Ϣʔβ×ืूͷ݁ՌΛσʔλετΞʹอଘ ߟ͑Δ͜ͱ • ʮϢʔβ×ืूʯ͕͸͍ΔσʔλετΞ • ຖ೔ͷֶशJob͕ࢭ·͍ͬͯͳ͍͔ʁ • Job͕ଟஈʹͳΔͱಛʹΘ͔Γʹ͘͘ͳΔˠData Pipelineͷ࿩

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©2019 Wantedly, Inc. ͦͷଞ σʔλͷਖ਼نԽ 1. ࡶଟͳ৘ใΛਖ਼نԽɾಉҰੑͳͲΛ൑ఆ͢Δ 2. ࣙॻΛ࡞Δ࢓ࣄ
3. Ϣʔβʹ͸ݟ͑ͳ͍͚Ͳ಺෦Ͱݡ͘ͳ͍ͬͯΔ #JH2VFSZ.- 1. ಺෦ͷϩδοΫͰ࢖͍ͬͯΔ 2. ࣮͸࢖ΘΕͯ·͢

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©2019 Wantedly, Inc. ࠓ೔ͷTake-Home Messages

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©2019 Wantedly, Inc. 1. ૊৫ͷ࿩ 2. σʔλͷ࿩ 3. ϓϩδΣΫτͷਐΊํͷ࿩

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©2019 Wantedly, Inc. ૊৫ͷ࿩

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©2019 Wantedly, Inc. ʮ૊৫ߏ଄͸ઓུΛܾΊΔʯ ΠΰʔϧɾΞϯκϑ ʢ͔͍͍ͬ֨͜ݴΛݴ͍͔͚ͨͬͨͩʣ

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©2019 Wantedly, Inc. ૊৫ͷ࿩ 8BOUFEMZͰ͸ɺϓϩμΫτνʔϜʹػցֶश ΤϯδχΞ͕͍Δ MLΤϯδχΞ ̏ਓ MLΤϯδχΞ ̎ਓ
Infrastructure Visit People

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©2019 Wantedly, Inc. ૊৫ͷ࿩ Ϣʔβ·Ͱͷڑ཭͕͍ۙ 1. ߦͬͨվળ͕μΠϨΫτʹϢʔβ·Ͱಧ͘ ϓϩμΫτʹՁ஋ͷ͋ΔվળΛߦ͍΍͍͢
1. ϓϩμΫτͷ޲͔͍ͬͯΔํ޲Λڞ༗͍ͯ͠ΔͷͰᴥᴪ͕ى͜ΓͮΒ͍ 2. ඞཁͰ͋Ε͹ϓϩμΫτͷϏδωεϩδοΫ·ͰखΛೖΕΒΕΔ վળ͚ͩͰͳ͘৽͍͠ػೳΛࣗવͱٞ࿦͢Δ 1. ։ൃνʔϜͷҰһͳͷͰ਺஋తͳվળ͚ͩͰͳ͘ʮ͜͏͋Δ΂͖ʯํ޲Λٞ࿦ͯ͠ਐΊΒΕΔ

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©2019 Wantedly, Inc. ૊৫ͷ࿩ ଞͷ૊৫ͷ͋Γํ σʔλαΠΤϯςΟετ ΤϯδχΞ σβΠφ Ϛωʔδϟ શࣾԣஅ
MLνʔϜ ϓϩμΫτνʔϜ શࣾԣஅ σʔλ෼ੳνʔϜ MLΤϯδχΞ ґཔ ݁Ռ

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©2019 Wantedly, Inc. ૊৫ͷ࿩ ଞͷ։ൃνʔϜͱ͸Ͳ͏ؔΘΔͷ͔ʁ 1. ։ൃελΠϧ: APIΛఆٛͯ͠WEBଆͱMLଆͰฒߦͯ͠։ൃ 1. e.g.
Ϣʔβʹෳ਺ͷهࣄΛฦ͍ͨ͠ɻهࣄͷϦετ͸WEBଆͰऔಘ͢ΔɻMLͷAPIΛݺͼग़ͯ͠ॱংΛܾఆ͢Δ 2. ؔΘΓํ 1. WEBଆ: લ΋ͬͯAPI spec͚ܾͩΊ͓ͯ͘ͱɺSTUBͯ͠MLଆΛ଴ͨͣʹ։ൃՄೳɻ 2. Πϯϑϥ: service-in͢ΔલʹɺෛՙͷϝτϦΫεͱ࠷ѱࢮΜͰ΋͍͍API͔ΫϦςΟΧϧͳAPI͔Λ͢Γ߹Θͤ 3. ίϛϡχέʔγϣϯ 1. ࣄલʹʮਫ਼౓ͷظ଴஋ʯΛ͢Γ߹ΘͤΔͱ͍͍ɻ 2. ௒ݡ͍API͕αΫοͱͰ͖Δ͜ͱ͸΄΅ແ͍ɻ99.9ˋͷਫ਼౓͕ඞཁͳཁ݅ͳͷ͔ɺݟͤํΛڞ༗͢Δ

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©2019 Wantedly, Inc. 8BOUFUEMZͰ͸ɺϓϩμΫτνʔϜʹ.-ΤϯδχΞ͕ೖΔͱ͍͏ಇ͖ํΛ औ͍ͬͯ·͢ɻϢʔβʹۙ͘ɺϓϩμΫτυϦϒϯͳಇ͖ํ͕͠΍͍͢ͱ ͍͏ϝϦοτ͕͋Γ·͢ɻ ϓϩμΫτνʔϜͷதͰ͸ɺࣄલʹʮޓ͍ͷ੹೚ൣғʯͱʮਫ਼౓ͷظ଴஋ʯ Λ͸͖ͬΓͤ͞Δͱࠞཚͳ͘։ൃ͕ਐΈ·͢ɻ ૊৫ͷ࿩

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©2019 Wantedly, Inc. %FFQ-FBSOJOHྠߨձ΍ͬͯ·͢ ຖिਫ༵೔ʙ!8BOUFEMZ

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©2019 Wantedly, Inc. σʔλ

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©2019 Wantedly, Inc. σʔλ ໘ന͍ྫ͑ʮσʔλ͸ݪ༉ʯ ͦͷ··Ͱ͸࢖͑ͳ͍ɻਫ਼੡͕ඞཁ Ճ޻͢Δͱ༷ʑͳ༻్ʹ࢖͑Δ
ੈքதͰσʔλͷऔΓ߹͍Λ͍ͯ͠Δ ग़లɿෆ໌

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©2019 Wantedly, Inc. Wantedlyͷ໘ന͍σʔλ w ϢʔβͷϓϩϑΟʔϧ਺ඦສΦʔμʔ w Ϣʔβͷͭͳ͕ΓωοτϫʔΫΤοδ਺ԯΦʔμʔ w ಡΈऔΒΕ໊ͨࢗԯ͘Β͍

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©2019 Wantedly, Inc. Data lake ඞཁͳσʔλ͸#JH2VFSZʹ ू໿Ͱ͖Δ࢓૊Έ͕͋Δ "OBMZUJDT

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©2019 Wantedly, Inc. ؾΛ͚ͭΔ͜ͱ w σʔλपΓͰ࣮ࡍ͋ͬͨ໰୊ 1. RPAͷ׆༻Ͱҙຯͷͳ͍େྔͷΞΫηε͕͋ͬͨͨΊɺݟ͔͚ͷฏۉར༻਺্͕͕ͬ ͨɻίϯόʔδϣϯΛ൐Θͳ͍ϩά͕૿͑ͯ਺஋͕มԽͨ͠ 2.
৽͍͠ػೳͷϦϦʔεͰςʔϒϧͷΧϥϜʹ৽͍͠஋͕ೖΔΑ͏ʹͳͬͨɻલ΋ͬͯ ݕ஌ͨͨ͠ΊϦϦʔεલʹमਖ਼Ͱ͖͕ͨɺ஌Βͳ͔ͬͨΒϞσϧ͕յΕ͍͔ͯͨ΋

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©2019 Wantedly, Inc. 8BOUFEMZͰ͸େن໛ͳϢʔβؔ࿈ͷσʔλΛ#JH2VFSZʹू໿͞ΕΔͱ͍ ͏ஈ֊·Ͱ࣮ݱ͞Ε͓ͯΓɺσʔλΛ࢖͏͜ͱࣗମ͸༰қʹͳΓ·ͨ͠ɻ ࠓޙ͸ߋʹਐΜͰ׆༻͠΍͕͢͞ΛղܾʹͳΓ·͢ɻ σʔλ΍ϩά͸αʔόͷ࣮૷͚ͩʹ׬݁ͯ͠ͳ͘ɺϝτϦΫε΍σʔλΛ ࢖͏.-ͷϞσϧʹ΋ӨڹΛ༩͑·͢ɻαʔόͷมߋ͕.-ϞσϧΛյ͞ͳ ͍Α͏ʹपΓʹڞ༗͠·͠ΐ͏ɻʢຊ౰͸ҟৗݕ஌ͳͲͰγεςϜతʹक Γ͍ͨʣ
σʔλ

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©2019 Wantedly, Inc. Machine Learning Best Practice • ϧʔϧ1: ػցֶशΛ࢖Θͳ͍Ͱ࢝ΊΒΕͳ͍͔ߟ͑Δ
• ϧʔϧ2: ઃܭͯ͠ࢦඪΛ࡞ΔʢݱࡏͷγεςϜΛཧղ͔ͯ͠ΒࢦඪΛ࡞Δʣ • ϧʔϧ3: ϩδοΫ͕ෳࡶʹͳͬͬͨΒػցֶशΛબ୒͢Δ ref: https://developers.google.com/machine-learning/guides/rules-of-ml/

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©2019 Wantedly, Inc. ϓϩδΣΫτͷਐΊํ ख୳Γظ ϧʔϧ૿Ճظ ػցֶश • ڞ௨ͷ஌ਓ਺͕ଟ͍ਓʢΛਪન͢Δʣ •
ϝτϦΫε=ϦΫΤετ਺ͱঝೝ཰ • ڞ௨ͷ஌ਓ਺͕ଟ͍ਓ • ಉ͡ձࣾͷਓ • ڞ௨ͷ໊ࢗΛ͍࣋ͬͯΔ਺͕ଟ͍ਓ • ಉ࣌ʹεΩϟϯ͞ΕͨਓͰڞ௨ͷͭ ͳ͕Γ͕͋Δ • ͜ͷ૊Έ߹Θͤ • ɾɾɾ • Deep Learningϕʔεͷਪન • + ABςετ

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©2019 Wantedly, Inc. ·ͱΊ ػցֶशͷϓϩμΫτ͸ɺ8&#ΤϯδχΞɾΠ ϯϑϥνʔϜͱҰॹʹ࡞͍ͬͯΔ ϓϩμΫτνʔϜͷதʹ.-ΤϯδχΞ͕͍Δߏ ଄ͳͷͰɺҰॹʹٞ࿦ͯ͠։ൃͰ͖Δ؀ڥ
ద੾ͳ՝୊Λݟ͚ͭͯ.-ͰՁ஋Λग़͢͜ͱʹڵ ຯΛ޿͛ͯ΄͍͠

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©2019 Wantedly, Inc. References • Rules of Machine Learning: Best
Practices for ML Engineering • https://developers.google.com/machine-learning/guides/rules-of-ml/ • Wantedly ͷػցֶशϓϩμΫτ։ൃΛࢧ͑Δػցֶशج൫ / #rejectcon2018 • https://speakerdeck.com/south37/number-rejectcon2018 Photo Credit • https://unsplash.com/photos/PMwu9gfCSbw

機械学習とのつきあいかた / How to get involved with Machine Learning @ Wantedly

機械学習とのつきあいかた / How to get involved with Machine Learning @ Wantedly

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