5年間のFintech × Rails実践に学ぶ - 基本に忠実な運用で築く高信頼性システム / 5 Years Fintech Rails Retrospective

೥ؒͷ'JOUFDIʷ3BJMT࣮ફʹֶͿ جຊʹ஧࣮ͳӡ༻Ͱங͘ߴ৴པੑγεςϜ .BTBUP0ICB !PICBSZF ,BJHJPO3BJMT LBJHJPOSBJMTLBJHJPOSBJMT@SFE

ʮͲ͏࡞Δ͔ʯͷτʔΫʹൺ΂ͯʮͲ͏ӡ༻͢Δ͔ʯͷτʔΫ͸গͳ͍ ࠙਌ձͱ͔ͩͱӡ༻ͷ࿩ͷ΄͏͕੝Γ্͕ͬͨΓ͢Δͷ͚ͩͲ

4QFBLFS 4NBSU#BOL *OD 4PGUXBSF&OHJOFFS&OHJOFFSJOH.BOBHFS .BTBUP0ICB !PICBSZF !PICBSZF

*OUSPEVDUJPO ࢿۚҠಈۀ ࢿܾۚࡁ๏ʹج͖ͮऔҾใࠂɺ൜ऩ๏९क ࢿۚอଘͷͨΊͷڙୗ౳ΛٻΊΔ 1 2 3 ηΩϡϦςΟ ػೳద߹ੑ
༗ޮੑ ࢖༻ੑ ϦεΫճආੑ ຬ଍ੑ ো֐ରԠϑϩʔ੔උ 'JOUFDIؔ܎ͳ͘׆͔ͤΔϊ΢ϋ΢΋ଟ͍ FUD ҟৗݕ஌ ΞϥʔττϦΞʔδ 3VOCPPL όον؅ཧ ϞδϡʔϧԽ FUD ⛓'JOUFDIؔ࿈ͷن੍ 💻ٻΊΒΕΔ඼࣭ಛੑ ✅΍͖ͬͯͨ͜ͱ υΩϡϝϯςʔγϣϯ ΞʔΩςΫνϟઃܭ 1$*%44 Χʔυ৘ใηΩϡϦςΟͷࠃࡍ౷Ұج४ ෆਖ਼ରࡦ΍৘ใ؅ཧͷཁ݅ͷ९क͕ඞਢ ࠃࡍϒϥϯυ ΧʔυܾࡁωοτϫʔΫͷར༻ʹ͋ͨΓ ֤ΧʔυձࣾΛ৹ࠪɾ؂ಜ͢Δ ڍ͛ͨن੍͸εϚʔτόϯΫͷࣄۀ಺༰ʹؔ࿈͢Δ΋ͷͷҰ෦ɻ'JOUFDIͱҰޱʹݴͬͯ΋ࣄۀ಺༰ʹΑͬͯେ͖͘ҟͳΔɻ ৴པੑ

*OUSPEVDUJPO جຊతͳऔΓ૊ΈΛ։ൃͱӡ༻ͰੵΈॏͶΔ ✅΍͖ͬͯͨ͜ͱ ։ൃ ӡ༻ ো֐ରԠϑϩʔ੔උ ҟৗݕ஌ ΞϥʔττϦΞʔδ όον؅ཧ
ϞδϡʔϧԽ υΩϡϝϯςʔγϣϯ ΞʔΩςΫνϟઃܭ 3VOCPPL ۚ༥ࣄނରࡦ Πϕϯτιʔγϯά ςετઓུ ύϑΥʔϚϯε ϞχλϦϯά ܨ͛Δ

*OUSPEVDUJPO ⛓ ن੍࢈ۀͷιϑτ΢ΣΞʹܞΘΓ೥ؒ΍͖ͬͯͨ͜ͱΛৼΓฦͬͯ੔ཧ 🛤 'JOUFDIͰٻΊΒΕΔ඼࣭ಛੑͱɺ࣮ݱ͢ΔͨΊͷ։ൃӡ༻ͷऔΓ૊Έ 👷 جຊతͳऔΓ૊ΈΛੵΈॏͶ࣮ͯߦ͢Δ͜ͱ͕ߴ͍৴པੑʹܨ͕Δ͸ͣ ࠓճͷτʔΫ ·ͩ·ͩಓ൒͹Ͱࢼߦࡨޡ͍ͯ͠ΔͷͰʮ͏ͪͰ͸͜͏΍͍ͬͯΔʯΈ͍ͨͳ࿩Λฉ͍ͯΈ͍ͨ

*OUSPEVDUJPO 0VUMJOF 'JOUFDIن੍ʹΑΓٻΊΒΕΔ඼࣭ಛੑ ӡ༻Λݟਾ͑ͨ։ൃ্ͷ޻෉ ߴ৴པੑΛங͘ӡ༻

'JOUFDIن੍ʹΑΓٻΊΒΕΔ඼࣭ಛੑ

'JOUFDIن੍ʹΑΓٻΊΒΕΔ඼࣭ಛੑ w ૹۚऔҾσʔλͷਖ਼֬ͳอଘͱ؅ཧ w ސ٬ࢿۚͷ෼ผ؅ཧɺหࡁ؅ཧ w ֎෦؂ࠪରԠͷͨΊͷϩά؅ཧ w औҾཤྺͷ໌֬ͳՄࢹԽ
w ن੍มߋରԠͷॊೈੑ w γεςϜো֐࣌ͷࢿۚอશ ࢿۚҠಈۀ ࢿۚҠಈۀ ࢿܾۚࡁ๏ʹج͖ͮऔҾใࠂɺ൜ऩ๏९क ࢿۚอଘͷͨΊͷڙୗ౳ΛٻΊΔ 1 2 3 ⛓'JOUFDIؔ࿈ͷن੍ 1$*%44 Χʔυ৘ใηΩϡϦςΟͷࠃࡍ౷Ұج४ ෆਖ਼ରࡦ΍৘ใ؅ཧͷཁ݅ͷ९क͕ඞਢ ࠃࡍϒϥϯυ ΧʔυܾࡁωοτϫʔΫͷར༻ʹ͋ͨΓ ֤ΧʔυձࣾΛ৹ࠪɾ؂ಜ͢Δ ճ෮ੑ ΠϯςάϦςΟ ੹೚௥੻ੑ FUD 1

'JOUFDIن੍ʹΑΓٻΊΒΕΔ඼࣭ಛੑ w ڧݻͳΞΫηε੍ޚ ݖݶɾೝূઃܭ w Χʔυ৘ใɾΞΧ΢ϯτσʔλͷ෼཭ w ੬ऑੑ؅ཧ
ύονద༻ɾ੬ऑੑ਍அ w ػີσʔλͷ҉߸Խͱ伴؅ཧ w ద੾ͳωοτϫʔΫ෼ׂ w ؂ࠪՄೳͳτϥϯβΫγϣϯه࿥ 1$*%44 ࢿۚҠಈۀ ࢿܾۚࡁ๏ʹج͖ͮऔҾใࠂɺ൜ऩ๏९क ࢿۚอଘͷͨΊͷڙୗ౳ΛٻΊΔ 1 2 3 ⛓'JOUFDIؔ࿈ͷن੍ 1$*%44 Χʔυ৘ใηΩϡϦςΟͷࠃࡍ౷Ұج४ ෆਖ਼ରࡦ΍৘ใ؅ཧͷཁ݅ͷ९क͕ඞਢ ࠃࡍϒϥϯυ ΧʔυܾࡁωοτϫʔΫͷར༻ʹ͋ͨΓ ֤ΧʔυձࣾΛ৹ࠪɾ؂ಜ͢Δ ػີੑ ΠϯςάϦςΟ ੹೚௥੻ੑ FUD 2

'JOUFDIن੍ʹΑΓٻΊΒΕΔ඼࣭ಛੑ w ւ֎ՃໍళɾωοτϫʔΫͱͷඪ४ ΠϯλʔϑΣʔε४ڌ w ܾࡁωοτϫʔΫ΁ͷߴՄ༻ੑ઀ଓ w ϒϥϯυ࢓༷΁ͷܧଓతରԠ w
Πϯγσϯτൃੜ࣌ͷଈ࣌ใࠂମ੍ w ෆਖ਼ར༻؂ࢹɾݕ஌ ࠃࡍϒϥϯυ ࢿۚҠಈۀ ࢿܾۚࡁ๏ʹج͖ͮऔҾใࠂɺ൜ऩ๏९क ࢿۚอଘͷͨΊͷڙୗ౳ΛٻΊΔ 1 2 3 ⛓'JOUFDIؔ࿈ͷن੍ 1$*%44 Χʔυ৘ใηΩϡϦςΟͷࠃࡍ౷Ұج४ ෆਖ਼ରࡦ΍৘ใ؅ཧͷཁ݅ͷ९क͕ඞਢ ࠃࡍϒϥϯυ ΧʔυܾࡁωοτϫʔΫͷར༻ʹ͋ͨΓ ֤ΧʔυձࣾΛ৹ࠪɾ؂ಜ͢Δ 3 ճ෮ੑ ଱ނোੑ Մ༻ੑ ༗ޮੑ ϦεΫճආੑ FUD

💻ٻΊΒΕΔ඼࣭ಛੑʢ୅දతͳ΋ͷʣ 'JOUFDIن੍ʹΑΓٻΊΒΕΔ඼࣭ಛੑ ཁ͔݅ΒಛੑΛಋ͖ग़͢ ࢿۚҠಈۀ ࢿܾۚࡁ๏ʹج͖ͮऔҾใࠂɺ൜ऩ๏९क ࢿۚอଘͷͨΊͷڙୗ౳ΛٻΊΔ 1 2 3
⛓'JOUFDIؔ࿈ͷن੍ ࠃࡍϒϥϯυ ΧʔυܾࡁωοτϫʔΫͷར༻ʹ͋ͨΓ ֤ΧʔυձࣾΛ৹ࠪɾ؂ಜ͢Δ ༻ޠ͸*40ͷιϑτ΢ΤΞ඼࣭ಛੑʹ४ڌ ͜ΕҎ֎ʹ΋ॏཁͳಛੑ͸͋Δ͕ࠓճͷൃදʹؔ࿈͢Δ΋ͷʹϑΥʔΧε ৴པੑ ճ෮ੑ ো֐͔Βਝ଎ʹճ෮Ͱ͖Δ ଱ނোੑ ো֐͕ൃੜͯ͠΋γεςϜ͕ਖ਼ৗʹػೳ͠ଓ͚Δ Մ༻ੑ ඞཁͳͱ͖ʹར༻Մೳ ηΩϡϦςΟ ༗ޮੑ ϦεΫճආੑ ػີੑ ར༻ऀσʔλอޢ ΠϯςάϦςΟ ਖ਼֬ʹอଘ ੹೚௥੻ੑ ୭͕ԿΛߦ͔ͬͨΛτϨʔεͰ͖Δ 1$*%44 Χʔυ৘ใηΩϡϦςΟͷࠃࡍ౷Ұج४ ෆਖ਼ରࡦ΍৘ใ؅ཧͷཁ݅ͷ९क͕ඞਢ

💻ٻΊΒΕΔ඼࣭ಛੑʢ୅දతͳ΋ͷʣ 'JOUFDIن੍ʹΑΓٻΊΒΕΔ඼࣭ಛੑ ཁ͔݅ΒಛੑΛಋ͖ग़͢ ࢿۚҠಈۀ ࢿܾۚࡁ๏ʹج͖ͮऔҾใࠂɺ൜ऩ๏९क ࢿۚอଘͷͨΊͷڙୗ౳ΛٻΊΔ 1 2 3
⛓'JOUFDIؔ࿈ͷن੍ 1$*%44 Χʔυ৘ใηΩϡϦςΟͷࠃࡍ౷Ұج४ ෆਖ਼ରࡦ΍৘ใ؅ཧͷཁ݅ͷ९क͕ඞਢ ࠃࡍϒϥϯυ ΧʔυܾࡁωοτϫʔΫͷར༻ʹ͋ͨΓ ֤ΧʔυձࣾΛ৹ࠪɾ؂ಜ͢Δ ༻ޠ͸*40ͷιϑτ΢ΤΞ඼࣭ಛੑʹ४ڌ ͜ΕҎ֎ʹ΋ॏཁͳಛੑ͸͋Δ͕ࠓճͷൃදʹؔ࿈͢Δ΋ͷʹϑΥʔΧε ηΩϡϦςΟ ༗ޮੑ ϦεΫճආੑ ػີੑ ར༻ऀσʔλอޢ ΠϯςάϦςΟ ਖ਼֬ʹอଘ ੹೚௥੻ੑ ୭͕ԿΛߦ͔ͬͨΛτϨʔεͰ͖Δ ৴པੑ ճ෮ੑ ো֐͔Βਝ଎ʹճ෮Ͱ͖Δ ଱ނোੑ ো֐͕ൃੜͯ͠΋γεςϜ͕ਖ਼ৗʹػೳ͠ଓ͚Δ Մ༻ੑ ඞཁͳͱ͖ʹར༻Մೳ

'JOUFDIن੍ʹΑΓٻΊΒΕΔ඼࣭ಛੑ w ʮ໌ࣔ͞Εͨ࣌ؒଳͰɼ໌ࣔ͞Εͨ৚݅ԼʹɼγεςϜɼ੡඼ຢ͸ ߏ੒ཁૉ͕໌ࣔ͞ΕͨػೳΛ࣮ߦ͢Δ౓߹͍ʯ *40*&$ w ʮΞΠςϜ͕ɼ༩͑ΒΕͨ৚݅ͷԼͰɼ༩͑ΒΕͨظؒɼނোͤͣ ʹɼཁٻͲ͓Γʹ਱ߦͰ͖Δೳྗʯ
+*4; w %03"ϞσϧW͔ΒՃΘͬͨ৴པੑ͸ɺʮ֤छࢦඪʹؔͯ͠ఆΊͨ ໨ඪΛͲΕ͚ͩୡ੒͍ͯ͠Δ͔ʯ %03" ͱ͜ΖͰ৴པੑͱ͸ IUUQTLJLBLVSVJDPNY9IUNM IUUQTLJLBLVSVJDPN[;IUNM %"3"$PSFWΑΓ ϏδωεϓϩμΫτͷཁٻʹΑͬͯࢦඪ͸ҟͳΔ

'JOUFDIن੍ʹΑΓٻΊΒΕΔ඼࣭ಛੑ Ͳ͏͢Ε͹͜ΕΒΛຬͨͤΔͷ͔ʁ w ͍ͣΕ΋୯ʹιϑτ΢ΣΞΛ։ൃ͢Δ ͚ͩͰ͸ຬͨͤͳ͍ w ӡ༻Λ௨࣮ͯ͡ݱ͢Δ΋ͷ w ͋Δ͍͸ӡ༻Λ૝ఆͯ͠։ൃ͠ͳ͍
ͱ࣮ݱͰ͖ͳ͍ 💻ٻΊΒΕΔ඼࣭ಛੑ ৴པੑ ճ෮ੑ ଱ނোੑ Մ༻ੑ ηΩϡϦςΟ ػີੑ ΠϯςάϦςΟ ੹೚௥੻ੑ

'JOUFDIن੍ʹΑΓٻΊΒΕΔ඼࣭ಛੑ w ϓϩηεࣗମʹয఺Λ͋ͯͨن֨͸ݹ͔͘Β͋Δ w ৘ใγεςϜͷޮՌͷ࠷େԽͷͨΊʹɺ৘ใγεςϜͷӡ༻Λ҆ ఆతɾޮ཰తʹ࣮ࢪ͢Δ͜ͱ *1"৘ใγεςϜϢʔβʔεΩϧ ඪ४ 6*44
w *5αʔϏεͷӡ༻؅ཧ͸ɺαʔϏεఏڙऀ͕ޮ཰తɾޮՌతʹܧ ଓతͳӡ༻Λߦ͏ͨΊͷϓϩηε܈ *40*&$ ͱ͜ΖͰӡ༻ͱ͸ IUUQTXXXJQBHPKQKJO[BJTLJMMTUBOEBSEQMVTJUVJVJTTIUNM IUUQTXXXKJQEFDPSKQBSDIJWFTQVCMJDBUJPOTHTVDO[NBUU+*1*54.4@NJIPOQEG

'JOUFDIن੍ʹΑΓٻΊΒΕΔ඼࣭ಛੑ ຊ࣭తʹ͸ϏδωεΛՄೳʹ͢Δ͜ͱ %FQMPZT1FS%BZ%FWBOE0QT$PPQFSBUJPOBU'MJDLS IUUQTXXXZPVUVCFDPNXBUDI W-E0F,IU5 ো֐΍γεςϜఀࢭ͕Ϗδωεᆝଛʹ௚݁͢Δ ࣄۀߏ଄Ͱ͸͜ͷ͜ͱΛڧ࣮͘ײ͠΍͍͢

ӡ༻Λݟਾ͑ͨ։ൃ্ͷ޻෉

ӡ༻Λݟਾ͑ͨ։ൃ্ͷ޻෉ Ͳ͏͢Ε͹͜ΕΒΛຬͨͤΔͷ͔ʁ ✅΍͖ͬͯͨ͜ͱ ։ൃ ӡ༻ ܨ͛Δ 💻ٻΊΒΕΔ඼࣭ಛੑ ৴པੑ ճ෮ੑ
଱ނোੑ Մ༻ੑ ηΩϡϦςΟ ػີੑ ΠϯςάϦςΟ ੹೚௥੻ੑ FUD ϞδϡʔϧԽ υΩϡϝϯςʔγϣϯ ΞʔΩςΫνϟઃܭ ۚ༥ࣄނରࡦ Πϕϯτιʔγϯά ςετઓུ

ΞʔΩςΫνϟઃܭ

ن੍ର৅ͷػೳΛຊମ͔Β෼཭͠ɺݖݶ΋ݫ͘͠؅ཧ

ཁ݅ʹಛԽͨ͠γεςϜίϯϙʔωϯτΛ෼཭

ӡ༻Λݟਾ͑ͨ։ൃ্ͷ޻෉ IUUQTTQFBLFSEFDLDPNZVUBEBZPTUBSUVQY fi OUFDI ZVUBEBZP

࣮ଶ͸ϞϊϦε ಛఆ՝୊ΛΦϑϩʔυ͢ΔTNBMMBQQT UBCMFT NPEFMT DPOUSPMMFST

ӡ༻Λݟਾ͑ͨ։ൃ্ͷ޻෉ $JUBEFM IUUQTTJHOBMWOPJTFDPNTWOUIFNBKFTUJDNPOPMJUIDBOCFDPNFUIFDJUBEFM IUUQTTQFBLFSEFDLDPNTIPIFJNJUBOJUIFDJUBEFM .POPMJUI $JUBEFM 0VUQPTU 0VUQPTU 0VUQPTU
0VUQPTU $JUBEFM ৓࠹ 0VUQPTU લḗج஍෼Ӧ 4IPIFJ.JUBOJ

ϞδϡʔϧԽ

͓͓Αͦͷػೳ͝ͱʹNPEVMFΛͭ͘Δ

ӡ༻Λݟਾ͑ͨ։ൃ্ͷ޻෉ w 3BJMTFOHJOF΍QBDLXFSL౳ͷ HFN͸༻͍ͣɺγϯϓϧʹ3VCZ CVJMUJOͷ.PEVMFΛ׆༻ w ػೳ͝ͱʹOBNFTQBDFͱͯ͠ NPEVMFΛ׆༻͢Δ͚ͩͰ 3&45"1*΍ςʔϒϧͷ໋໊نଇ
ͷ४ڌ͕ଅਐ͞ΕΔ ੵۃతͳϞδϡʔϧԽ module Subscription def self.table_name_prefix 'subscription_' end end module Subscription class Order < ApplicationRecord def charge!; end end end

ӡ༻Λݟਾ͑ͨ։ൃ্ͷ޻෉ w $PODFSODPODFSOJOHΛ׆༻ͨ͠Ϟ δϡʔϧԽ΋ੵۃతʹߦ͏ w 7BOJMMB3BJMTJTQMFOUZΛࢀߟʹ ίʔυͷ࠶ར༻ΑΓ΋੹຿ͷ੔ཧ΍ ໌֬ԽΛॏࢹ w
ίʔυ΍Φʔφʔγοϓڥք͕Θ͔ Γ΍͘͢ͳΓޙड़͢Δӡ༻վળʹߩݙ ੵۃతͳϞδϡʔϧԽ IUUQTEFWTJHOBMTDPNWBOJMMBSBJMTJTQMFOUZ module Subscription class Subscription concerning :Cancelable do def cancel! private def cancelable? end end end

ͦͷ΄͔ͷ޻෉

ӡ༻Λݟਾ͑ͨ։ൃ্ͷ޻෉ ۚ༥ࣄނରࡦ Πϕϯτιʔγϯά %BZ!)BMM3FE NPLVP IUUQTTQFBLFSEFDLDPNPICBSZFTBGFSFUSZXJUIJEFNQPUFODZLFZIFBEFS IUUQTTQFBLFSEFDLDPNNPLVPBTZODBSDIJUFDUVSFQBUUFSOT 'FBUVSF'MBHT

ӡ༻Λݟਾ͑ͨ։ൃ্ͷ޻෉ w 0QFO"1*ʹΑΔ"1*ఆٛهड़͸DPNNJUUFFͰඞਢԽ w QVCMJDNFUIPETͷେ൒ʹ:"3%ίϝϯτΛهड़ ࡢࠓ͸3#4*OMJOFͷ೾ w $VSTPS΍%FWJOͱ͍ͬͨΠϯσοΫεΛ࣋ͭίʔσΟϯάΤʔδΣϯτͰͷҰ࣍ௐࠪɾ։ൃʹ༗ར
w ॏཁͳܾࡁྖҬʹ͸ෳ਺ΞϓϦέʔγϣϯΛ·͙ͨ &&ςετΛ੔උ w ςετ࣮ߦ࣌ؒͷ؂ࢹͱ୹ॖ w .553 ฏۉम෮࣌ؒ ͷ୹ॖʹ΋ܨ͕Δ ςετઓུ υΩϡϝϯςʔγϣϯ ͜ͷ΁Μ͸඼࣭ಛੑͰ͍͏ͱอकੑͷ࿩Ͱ͸͋Δ͕৴པੑʹ΋ߩݙ͢Δ IUUQTGPSUFFKQZBQDGVLVPLBQSPQPTBMGFBEFFFFFD UZPIFJ TUFGBGBGBO

ӡ༻Λݟਾ͑ͨ։ൃ্ͷ޻෉ ن੍ର৅ͷ෼཭ʹΑΓཁٻ͞ΕΔ ηΩϡϦςΟਫ४Λຬ଍ Ұ෦γεςϜͷΈݖݶΛߜΓɺ ؂ࠪূ੻͕࢒ΔΑ͏ʹ ϞδϡʔϧԽ ΞʔΩςΫνϟઃܭ ϞϊϦεΛ਺ेਓͰ։ൃ͠ͳ͕Β΋ ੹೚෼ք఺͕Θ͔Γ΍͘͢ͳΔ
ޙड़͢Δӡ༻ͷ޻෉Ͱؒ઀తʹد༩ 💻ٻΊΒΕΔ඼࣭ಛੑ ৴པੑ ճ෮ੑ ଱ނোੑ Մ༻ੑ ηΩϡϦςΟ ػີੑ ΠϯςάϦςΟ ੹೚௥੻ੑ ۚ༥ࣄނରࡦ Πϕϯτιʔγϯά ςετઓུ υΩϡϝϯςʔγϣϯ ௚઀తɾؒ઀తʹಛੑΛ࣮ݱ

ߴ৴པੑΛங͘ӡ༻

ߴ৴པੑΛங͘ӡ༻ ✅΍͖ͬͯͨ͜ͱ ӡ༻ ύϑΥʔϚϯεϞχλϦϯά ো֐ରԠϑϩʔ੔උ ҟৗݕ஌ͷ࢓૊Έ 3VOCPPL ΞϥʔττϦΞʔδ όον؅ཧ
։ൃ ΞʔΩςΫνϟઃܭ ϞδϡʔϧԽ ܨ͛Δ Ͳ͏͢Ε͹͜ΕΒΛຬͨͤΔͷ͔ʁ 💻ٻΊΒΕΔ඼࣭ಛੑ ৴པੑ ճ෮ੑ ଱ނোੑ Մ༻ੑ ηΩϡϦςΟ ػີੑ ΠϯςάϦςΟ ੹೚௥੻ੑ ӡ༻໘ͷऔΓ૊Έ͸ओʹ৴པੑͷ࣮ݱʹߩݙ

ߴ৴པੑΛங͘ӡ༻ w ॏཁͳͷ͸ʮࢿۚҠಈۀͷదਖ਼͔࣮ͭ֬ ͳ਱ߦʯ w ϏδωεΛՄೳʹ͢Δ͜ͱ w ো֐݅Ͱ͋Εɺͱ͸ݴΘͳ͍ w
ൃੜʹඋ͑ɺ଎΍͔ͳݕ஌ͱใࠂɺ໰୊ ͷղܾΛਤΔଶ੎Λཁ͢Δ ٻΊΒΕΔ؅ཧମ੍ࢿۚҠಈۀऀ޲͚ΨΠυϥΠϯ IUUQTXXXGTBHPKQDPNNPOMBXHVJEFLBJTZBQEG

ߴ৴པੑΛங͘ӡ༻ ଎΍͔ʹ໰୊Λղܾ͢Δ ύϑΥʔϚϯεϞχλϦϯά ো֐ରԠϑϩʔ੔උ ҟৗݕ஌ͷ࢓૊Έ 3VOCPPL ΞϥʔττϦΞʔδ όον؅ཧ ଎΍͔ʹݕ஌͢Δ
ൃੜʹඋ͑ɺ༧๷͢Δ

ߴ৴པੑΛங͘ӡ༻ w γεςϜͱͯ͋ͬͯ͠΄͘͠ͳ͍ ঢ়ଶΛݕ஌͢Δ w ݕࢉूܭͰσʔλͷ੔߹ੑΛ֬ೝ ҟৗݕ஌ͷ࢓૊Έ IUUQTTQFBLFSEFDLDPNTIPIFJNJUBOJLBJHJPOSBJMT
Ұൠతͳ֎ܗ؂ࢹͷ࿩͸ࠓճ͸লུ ʮ΋͠΋σʔλ͕͜͏ͳͬͨΒϏδωε͕ ᆝଛ͞ΕΔͳʯΛ૝૾ͯ͠උ͑Δ 4IPIFJ.JUBOJ

ߴ৴པੑΛங͘ӡ༻ w γεςϜͷมԽΛݟͭΊΔCJXFFLMZύϑΥʔ ϚϯεϛʔςΟϯάΛܧଓ w ظؒલޙͷΠϕϯτ΍ϦϦʔε౳ʹ͍ͭͯ ڞ༗ w /FX3FMJD
"1. 4-0 4FOUSZ "84 1FSGPSNBODF*OTJHIUTFUDΛோΊΔ w ՝୊ਓ਺͕ଟ͘ͳΓޮ཰తͳӡ༻Λ໛ࡧத ύϑΥʔϚϯεϞχλϦϯά ͸ͯͳࣾͷ1FSGPSNBODF8PSLJOH(SPVQͱࣅ͍ͯͦ͏ IUUQTTQFBLFSEFDLDPNEBJLTZEFWPQTEBZTUPLZPLFZOPUF

ߴ৴པੑΛங͘ӡ༻ w ܾࡁ͸ϨεϙϯελΠϜ͕/ඵΛ௒͑Δͱ औҾࣦഊͱͳΓɺ໌Β͔ʹϏδωεᆝଛ w ؔ࿈͢Δ"1*ϨΠςϯγʔ4-0ΛఆΊɺԼ ճͬͨࡍʹ͸ύϑΥʔϚϯεվળͷΞΫ γϣϯΛى͖ͯͨ͜͠ 4-*4-0ͷಋೖ
IUUQTCMPHTNBSUCBOLDPKQFOUSZ IUUQTCMPHTNBSUCBOLDPKQFOUSZJTVDPO@NBLFT@VT@IBQQZ IUUQTCMPHTNBSUCBOLDPKQFOUSZ

ߴ৴པੑΛங͘ӡ༻ w ࣮૷࣌ͷόονυΩϡϝϯςʔγϣϯΛඞਢԽ w ΞϥʔτΛड͚औͬͨΤϯδχΞ͕ɺ࣮૷ͷৄࡉΛ஌ Βͳͯ͘΋ϦτϥΠՄ൱΍खॱΛ൑அͰ͖Δ όον؅ཧ

ߴ৴པੑΛங͘ӡ༻ w Ϣʔβʔ਺΍σʔλྔͷ૿Ճʹ൐͍௕࣌ ؒԽ͢Δόον͕૿͖͑ͯͨ w ͢΂ͯͷόονʹ૝ఆ࠷େॲཧ࣌ؒ 4-0 Λઃఆ͠ɺ௒ա࣌ʹΞϥʔτΛ ग़͢Α͏ʹͨ͠
w ࣮ߦ࣌ؒͷ৳ͼ͔Βɺ͋ͱͲΕ͘Β͍ͷ ظؒͰ4-0௒ա͢Δ͔Λ༧ଌͯ͠ରॲ ௨শ΍͹͍Α΍͹͍ΑϝτϦΫε όονॲཧ࣌ؒΛ4-0ͱͯ͠ઃఆ DPZPUF KPIJSB NPLVP

ߴ৴པੑΛங͘ӡ༻ w ରԠ༏ઌ౓ͷߴ͍*TTVFͷΈΞϥʔτ͞ΕΔΑ͏ʹ ͢Δ w ΞϥʔτͷτϦΞʔδΨΠυϥΠϯΛఆΊΔ w ΞϥʔτΛඈ͹͢৚݅ "MFSU3VMF
Λ࠶ߏங͢Δ w ӡ༻ํ਑ʹج͖ͮɺΞϥʔτӡ༻ͷҠߦ࡞ۀΛ࢝ ΊΔ ΞϥʔττϦΞʔδ OBHBTBXB BTIJNPNVSB IUUQTCMPHTNBSUCBOLDPKQFOUSZ 4FOUSZΤϥʔ௨஌νϟϯωϧ͕ޫͬͨΒ ʮ୭͔ʯ͕ʮࢸٸʯݟͳ͚Ε͹ߦ͚ͳ͍ঢ়ଶΛ࡞Δ

ߴ৴པੑΛங͘ӡ༻ w Φʔφʔγοϓ͕໌֬ͳΒ"MFSU3VMFઃఆ͸༰қ w $JUBEFMύλʔϯͰ෼཭ͨ͠ಛఆͷPVUQPTUT͸ ಛఆͷνʔϜ΁ w ಛఆͷϞδϡʔϧ΍ύεͰൃੜͨ͠Τϥʔ͸ಛ ఆͷνʔϜ΁
͜Ε·Ͱ΋෦෼తͳࣗಈτϦΞʔδ͸Ͱ͖͍ͯͨ ͙Β͍ 0XOFSTIJQ3VMFTIUUQTEPDTTFOUSZJPQSPEVDUJTTVFTPXOFSTIJQSVMFT ࠔ೉ͳͷ͸Φʔφʔγοϓ͕ ᐆດͳྖҬ͔ΒඈΜͰ͘ΔṖͷΞϥʔτ ϞδϡʔϧԽ module Atr $JUBEFMΞʔΩςΫνϟ

ߴ৴པੑΛங͘ӡ༻ ղܾࡦམͪண͘·ͰضৼΓ໾͕௒ؤுΔ 4FOUSZΞϥʔτ͸ˠ݅XFFLͱݮগ👏

ো֐ରԠϑϩʔ੔උ

ߴ৴པੑΛங͘ӡ༻ IUUQTSFTQPOTFQBHFSEVUZDPN IUUQTVFPLBOEFHJUIVCJPJODJEFOUSFTQPOTFEPDTKB ༗ࢤʹΑΔ೔ຊޠ൛ w 4FWFSJUZ ΛϏδω εʹ߹Θͤͯఆٛ
w ࣗ෼ͨͪͷϏδωεΛᆝ ଛ͢Δো֐ͱ͸Կ͔ʁ w ো֐ରԠϑϩʔΛ੔උ 1BHFS%VUZΛࢀߟʹ੔උ

ߴ৴པੑΛங͘ӡ༻ ΠϯγσϯτίϚϯμʔ ͷ໾ׂ΍ϑϩʔఆٛ 4FWFSJUZPSͰ͸ ϙετϞʔςϜ࣮ࢪ

3VOCPPL੔උ

ߴ৴པੑΛங͘ӡ༻ w ݸผͷࣄྫ΍ӡ༻ʹରॲ͢ΔͨΊͷखॱॻ ௨শ3VOCPPL w खಈΦϖϨʔγϣϯΛܗࣜ஌ʹ͢Δ w ཧ૝͸ࣗಈԽ͕ͩɺճ਺΍ॴཁ࣌ؒʹԠͯ͡ίεύɾ༏ઌ౓൑அ͕Ͱ͖Δ
w έʔεʹΑͬͯ͸ࣗಈԽ͕Ͱ͖ͳ͍ΦϖϨʔγϣϯ΋͋Δ 📗

ߴ৴པੑΛங͘ӡ༻ w 4MBDL౤ߘʹಛఆͷSFBDUJPOΛ෇͚Δͱ 3VOCPPL͕αδΣετ͞ΕΔΑ͏ʹ w Τϥʔ͚ͩͰͳ͘$4໰͍߹ΘͤͳͲΛτ ϦΨʔͱͨ͠ӡ༻࡞ۀΛ୭Ͱ΋ߦ͑Δঢ় ଶʹ͍͍ۙͮͯΔ 3VOCPPLTVHHFTUJPO
ʮͰ͖ͨʯ LVSJTV

ߴ৴པੑΛங͘ӡ༻ ✅΍͖ͬͯͨ͜ͱ ӡ༻ ։ൃ ΞʔΩςΫνϟઃܭ ϞδϡʔϧԽ ௚઀తɾؒ઀తʹಛੑΛ࣮ݱ 💻ٻΊΒΕΔ඼࣭ಛੑ ৴པੑ
ճ෮ੑ ଱ނোੑ Մ༻ੑ ηΩϡϦςΟ ػີੑ ΠϯςάϦςΟ ੹೚௥੻ੑ ܨ͛Δ ӡ༻໘ͷऔΓ૊Έ͸ओʹ৴པੑͷ࣮ݱʹߩݙ ύϑΥʔϚϯεϞχλϦϯά ো֐ରԠϑϩʔ੔උ ҟৗݕ஌ͷ࢓૊Έ 3VOCPPL ΞϥʔττϦΞʔδ όον؅ཧ

͓ΘΓʹ

ߴ৴པੑΛங͘ӡ༻ w Ϣʔβʔ਺ɾػೳ਺ɾ։ൃऀ਺ ͸೥ؒͣͬͱܧଓతʹ૿Ճ w ো֐݅਺͸೥ˠ೥ʹ͔ ׂ͚ͯҎ্ݮΓ೥΋ݎௐ ੒Ռ ো֐݅਺Λ΋ͬͯߴ͍৴པੑ͕͋Δͱݴ͍੾Δͷ͸೉͍͕ۙ͠ࣅࢦඪͱͯ͠ϐοΫΞοϓ
εέʔϧʹ଱͑͏Δߴ৴པੑΛ ։ൃӡ༻Λ௨࣮ͯ͡ݱͭͭ͋͠Δ աڈ೥ؒͷ-P$੒௕ͱো֐݅਺

·ͱΊ ࿩ͨ͜͠ͱ 🏢 ن੍࢈ۀͷιϑτ΢ΣΞʹܞΘΓ೥ؒ΍͖ͬͯͨ͜ͱΛৼΓฦͬͯ੔ཧ 🤝 ࣗ෼ͨͪͷϏδωεΛᆝଛ͢Δ΋ͷ͸Կ͔Λߟ͑ ো֐ͷ༧๷ɺݕ஌ɺਝ଎ͳճ෮ͷͨΊʹ΍͖ͬͯͨ͜ͱ ✂ ͲΕ΋جຊతͳऔΓ૊Έ͕ͩɺੵΈॏͶ͕ߴ৴པੑʹͭͳ͕Δ

͓ΘΓʹ ࢿۚҠಈۀ ࢿܾۚࡁ๏ʹج͖ͮऔҾใࠂɺ൜ऩ๏९क ࢿۚอଘͷͨΊͷڙୗ౳ΛٻΊΔ 1 2 3 ηΩϡϦςΟ ػೳద߹ੑ
༗ޮੑ ࢖༻ੑ ϦεΫճආੑ ຬ଍ੑ ো֐ରԠϑϩʔ੔උ FUD ҟৗݕ஌ ΞϥʔττϦΞʔδ 3VOCPPL όον؅ཧ ϞδϡʔϧԽ FUD ⛓'JOUFDIؔ࿈ͷن੍ 💻ٻΊΒΕΔ඼࣭ಛੑ ✅΍͖ͬͯͨ͜ͱ υΩϡϝϯςʔγϣϯ ΞʔΩςΫνϟઃܭ 1$*%44 Χʔυ৘ใηΩϡϦςΟͷࠃࡍ౷Ұج४ ෆਖ਼ରࡦ΍৘ใ؅ཧͷཁ݅ͷ९क͕ඞਢ ࠃࡍϒϥϯυ ΧʔυܾࡁωοτϫʔΫͷར༻ʹ͋ͨΓ ֤ΧʔυձࣾΛ৹ࠪɾ؂ಜ͢Δ ৴པੑ ͜ͷࢥߟϓϩηε͸ҰൠԽͰ͖Δ

νʔϜͰҙݟަ׵͢Δͱ໘ന͍ ͓ΘΓʹ ࢿۚҠಈۀ ࢿܾۚࡁ๏ʹج͖ͮऔҾใࠂɺ൜ऩ๏९क ࢿۚอଘͷͨΊͷڙୗ౳ΛٻΊΔ 1 2 3 ηΩϡϦςΟ
ػೳద߹ੑ ༗ޮੑ ࢖༻ੑ ϦεΫճආੑ ຬ଍ੑ ো֐ରԠϑϩʔ੔උ FUD ҟৗݕ஌ ΞϥʔττϦΞʔδ 3VOCPPL όον؅ཧ ϞδϡʔϧԽ FUD ⛓'JOUFDIؔ࿈ͷن੍ 💻ٻΊΒΕΔ඼࣭ಛੑ ✅΍͖ͬͯͨ͜ͱ υΩϡϝϯςʔγϣϯ ΞʔΩςΫνϟઃܭ 1$*%44 Χʔυ৘ใηΩϡϦςΟͷࠃࡍ౷Ұج४ ෆਖ਼ରࡦ΍৘ใ؅ཧͷཁ݅ͷ९क͕ඞਢ ࠃࡍϒϥϯυ ΧʔυܾࡁωοτϫʔΫͷར༻ʹ͋ͨΓ ֤ΧʔυձࣾΛ৹ࠪɾ؂ಜ͢Δ ৴པੑ ࣗ෼͕ͨͪӡ༻Ͱ Մೳʹ͢΂͖ Ϗδωεͱ͸Կ͔ʁ ࣗ෼ͨͪͷ Ϗδωεʹ͓͚Δ ৴པੑͱ͸Կ͔ʁ ߴ͍৴པੑΛ ஙͨ͘Ίʹ Ͱ͖Δ͜ͱ͸ʁ

ʮࠓ೔Ͱ͖ͦ͏ͳΑ͍มԽʯͱࢥ͑Δ ׆ಈ͕ຊൃද಺ʹ͋Ε͹޾͍Ͱ͢ IUUQTLBJHJPOSBJMTPSHUBMLTNPSPEBZ%ZOBNJDΑΓ

೥ؒͷ'JOUFDIʷ3BJMT࣮ફʹֶͿ جຊʹ஧࣮ͳӡ༻Ͱங͘ߴ৴པੑγεςϜ .BTBUP0ICB !PICBSZF ,BJHJPO3BJMT LBJHJPOSBJMTLBJHJPOSBJMT"

"QQFOEJY

"QQFOEJY w ࢿۚҠಈۀྩ࿨̏೥݄̑ࢿܾۚࡁʹؔ͢Δ๏཯ʢฏ੒೥๏཯ୈ߸ʣ w IUUQTXXXGTBHPKQDPNNPOMBXHVJEFLBJTZBQEG w 1$*%44 w IUUQTXXXQDJTFDVSJUZTUBOEBSETPSH
w %03"$PSFW w IUUQTHJUIVCDPNEPSBUFBNEPSBEFWEJTDVTTJPOT w *40 w IUUQTJTPDPNJOEFYQIQFOJTPTUBOEBSETJTP w ৘ใγεςϜϢʔβʔεΩϧඪ४ʢ6*44ʣ7FS w IUUQTXXXJQBHPKQKJO[BJTLJMMTUBOEBSEQMVTJUVJVJTTIUNM w ӡ༻؅ཧͷ͓खຊ*40*&$ ～ ࣄྫ͔Βֶ΅͏ ～ w IUUQTXXXKJQEFDPSKQBSDIJWFTQVCMJDBUJPOTHTVDO[NBUU+*1*54.4@NJIPOQEG w %FQMPZT1FS%BZ%FWBOE0QT$PPQFSBUJPOBU'MJDLS w IUUQTXXXZPVUVCFDPNXBUDI W-E0F,IU5

"QQFOEJY։ൃ্ͷ޻෉ؔ࿈ w ܾࡁαʔϏεˠ։ൃ࣌ͷΞʔΩςΫνϟʹ͍ͭͯ4UBSUVQʷ'JO5FDI w IUUQTTQFBLFSEFDLDPNZVUBEBZPTUBSUVQY fi OUFDI
w 5IF.BKFTUJD.POPMJUIDBOCFDPNF5IF$JUBEFM w IUUQTTJHOBMWOPJTFDPNTWOUIFNBKFTUJDNPOPMJUIDBOCFDPNFUIFDJUBEFM w 5IF$JUBEFM w IUUQTTQFBLFSEFDLDPNTIPIFJNJUBOJUIFDJUBEFM w 7BOJMMB3BJMTJTQMFOUZ w IUUQTEFWTJHOBMTDPNWBOJMMBSBJMTJTQMFOUZ w 4BGF3FUSZXJUI*EFNQPUFODZ,FZ)FBEFS w IUUQTTQFBLFSEFDLDPNPICBSZFTBGFSFUSZXJUIJEFNQPUFODZLFZIFBEFS w σʔλͷ੔߹ੑΛอͭඇಉظॲཧΞʔΩςΫνϟύλʔϯ w IUUQTTQFBLFSEFDLDPNNPLVPBTZODBSDIJUFDUVSFQBUUFSOT w େن໛3BJMTΞϓϦͰ෼Ҏ্͔͔͍ͬͯͨςετΛ෼୆ʹ͖ͨ͠Ύ͏଎ͳվળͷશ๴ w IUUQTGPSUFFKQZBQDGVLVPLBQSPQPTBMGFBEFFFFFDɹ

"QQFOEJYӡ༻ؔ࿈ w ؂ࢹΛ௨ͨ͡αʔϏεͷஞ࣍తਐԽd#ͷܾࡁαʔϏεͰͷऔΓ૊Έd w IUUQTTQFBLFSEFDLDPNTIPIFJNJUBOJLBJHJPOSBJMT w ͸ͯͳͷ։ൃ೥࢙ͱ%FW0QTͷาΈ
w IUUQTTQFBLFSEFDLDPNEBJLTZEFWPQTEBZTUPLZPLFZOPUF w զʑ͸͜͏ͯ͠4-*4-0Λઃܭͯ͠ӡ༻Λ࢝Ί·ͨ͜͠Ε͔Β4-*4-0ͷӡ༻Λ࢝ΊΔਓʹ޲͚ͯ w IUUQTTQFBLFSEFDLDPNNBBBBUPTMPOPZVOZPOHXPTIJNFSVSFOOJYJBOHLFUF w *46$0/͕ۀ຿ʹ໾ཱͭॠܾؒࡁॲཧ࣌ؒͷѱԽΛղܾ͢Δ·Ͱͷي੻ w IUUQTCMPHTNBSUCBOLDPKQFOUSZJTVDPO@NBLFT@VT@IBQQZ w ΠϯσοΫεͷਖ਼ղΛ୳ͤʂܾࡁϨεϙϯελΠϜΛվળͨ͠ύϑΥʔϚϯενϡʔχϯά w IUUQTCMPHTNBSUCBOLDPKQFOUSZ w 4FOUSZͷ"MFSU#FTU1SBDUJDFTΛࢀߟʹΞϥʔτർΕ͔Β୤٫͢Δ w IUUQTCMPHTNBSUCBOLDPKQFOUSZ w 4FOUSZ0XOFSTIJQ3VMFT w IUUQTEPDTTFOUSZJPQSPEVDUJTTVFTPXOFSTIJQSVMFT w 1BHFS%VUZ*ODJEFOU3FTQPOTF%PDVNFOUBUJPO w IUUQTSFTQPOTFQBHFSEVUZDPN

5年間のFintech × Rails実践に学ぶ - 基本に忠実な運用で築く高信頼性システム ...

5年間のFintech × Rails実践に学ぶ - 基本に忠実な運用で築く高信頼性システム / 5 Years Fintech Rails Retrospective

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