Petr Filaretov
Passionate software engineer who is always striving for excellence.
Work
Senior Software Engineer | Tech Lead
![Cover image for [Tiny] Spring Data JDBC: When a Map Pretends to Be a String](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F3nhjpuiv7ijsa3xm76ov.jpg)
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![Cover image for [Tiny] Is a sealed class abstract? Kotlin and Java way.](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F1kftfg2837lvovxjxkmq.jpg)
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![Cover image for [Digest] Java, Kotlin, Spring, Cloud, and More - Episode 18](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Ft5y016tgbxf3cqf2wur1.png)
![Cover image for [Digest] Java, Kotlin, Spring, Cloud, and More - Episode 17](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fasklw31nklhemc6ve20f.png)
![Cover image for [Digest] Java, Kotlin, Spring, Cloud, and More - Episode 16](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F2zya7hb6q3vgd0o560j3.png)
![Cover image for [Digest] Java, Kotlin, Spring, Cloud, and More - Episode 15](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F41nuruwuo87uwigv26t9.png)
![Cover image for [Tiny] Injecting Dependency With Default Value in Spring: What Could Go Wrong?](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fijb5bamrysbwgalkwcza.jpg)
![Cover image for [Digest] Java, Kotlin, Spring, Cloud, and More - Episode 14](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fhjaor1j9mfywtz6dwanf.png)
![Cover image for [Digest] Java, Kotlin, Spring, Cloud, and More - Episode 13](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F4od4pr0wadlf0zq3vhrp.png)
![Cover image for [Digest] Java, Kotlin, Spring, Cloud, and More - Episode 12](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fuvetdfig0bq5il7klrln.png)
![Cover image for [Digest] Java, Kotlin, Spring, Cloud, and More - Episode 10 & 11](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F4rhpzzg7rcwynsjgm6z6.png)
![Cover image for [Tiny] The Story of MockK and ClassCastException](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Flx6mnzk48re99w2fwx9r.jpg)
![Cover image for [Tiny] How to Upgrade Gradle Wrapper Using Custom Gradle Distribution](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fk9hoa4ppwm2mo156zgbu.jpg)
![Cover image for [Digest] Java, Kotlin, Spring, Cloud, and More - Episode 9](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F2qnb7k3rk07myabmxv81.png)
![Cover image for [Digest] Java, Kotlin, Spring, Cloud, and More - Episode 8](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F0watfd4rulogs98gmpzx.png)
![Cover image for [Digest] Java, Kotlin, Spring, Cloud, and More - Episode 7](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F8zni3w4aae9t9ogu08gs.png)
![Cover image for [Digest] Java, Kotlin, Spring, Cloud, and More - Episode 6](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fadqdhlpm4njaf1iiucfg.png)
![Cover image for [Digest] Java, Kotlin, Spring, Cloud, and More - Episode 5](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fjyjah9ylevim7q17iwj2.png)
![Cover image for [Digest] Java, Kotlin, Spring, Cloud, and More - Episode 4](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Filhbybyj8zohd2nkgpow.png)
![Cover image for [Digest] Java, Kotlin, Spring, Cloud, and More - Episode 3](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fg00h6euq24v9xfkawcb9.jpg)
![Cover image for [Digest] Java, Kotlin, Spring, Cloud, and More - Episode 2](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fawe7uem8qavjdm0qce4j.jpg)
![Cover image for [Digest] Java, Kotlin, Spring, Cloud, and More - Episode 1](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F1x7blaoxmf3xavkobtrm.jpg)
![Cover image for [Tiny] How to Upgrade Gradle Wrapper](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fxkvnwq5qj61oebs1mq4y.jpg)
![Cover image for [Tiny] How the conversion of int[] to List<Integer> can be buggy?](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Feutwpvl62kyind4tfk2g.jpg)
![Cover image for [Tiny] The Least Known Set in Java: EnumSet](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Ffx6ermlcuk4z5os56lz7.jpg)
![Cover image for [Tiny] Trailing commas in Java](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fsivwy194xrh8xqpkerd1.jpg)
![Cover image for [Tiny] Elapsed Time in Java: currentTimeMillis vs nanoTime](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fwefz58mu651u0699r1tl.jpg)
![Cover image for [Tiny] How to Group List Elements in Java](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F0bjm46m87lbkc9kbnrvd.jpg)
![Cover image for [Tiny] Nice Way to Build Strings in Kotlin](https://media2.dev.to/dynamic/image/width=1000,height=1000,fit=scale-down,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fvrm21ftk5yq8rckkumy9.jpg)
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Passionate software engineer who is always striving for excellence.
Work
Senior Software Engineer | Tech Lead
