CV

Hello, my name is Daniil Dyachenko (ru, eng), I write backend on kotlin & spring🌿.

• Mail: [email protected]
• Telegram: @hegemonies
• Github: hegemonies
• LinkedIn: daniil-dyachenko
• Website: hegemonies.site
• Download CV eng: CV eng
• Download CV ru: CV ru

I am working in the Prequel Inc. company that developing an AI-based photo and video editing app for mobile both iOS and Android systems right now.

I worked in the Eltex company that manufactures telecommunication devices from May 2019 to December 2022. We are developing an NMS (network management system). Services are being of my pride:

• Task service that implements logic helps users make fire-and-forget, recurring and delayed tasks on the management of network devices. This service uses a queue in PostgreSQL.
• Monitoring service (split into three microservices) that implements the logic for collecting a network device’s metrics by SNMP protocol, discovering network devices and device’s entities (like interfaces, SLA tests, and so on). This service allows the user to not think about monitoring his devices because we made a solution from the box.
• The firmware storing service implements the logic for downloading and uploading firmware files by HTTP protocol (and by FTP protocol in the future). This service allows you to work with him in parallel, because he uses a reactive way to communicate a client with a server and async input\output on a disk.

These are all services I made by myself from scratch.

Experience

Kotlin Backend Developer in Prequel Inc.

Since December 2022.

Stack:

• Kotlin
• Spring Framework
• R2DBC
• gRPC, REST
• PostgreSQL, Redis, Kafka

Kotlin Backend Developer in Eltex enterprise

3.75 years from May 2019 to December 2022.

The product name is ECCM.

Stack

• Kotlin (experienced), Golang (beginner), Python (beginner)
• Spring Framework
• PostgreSQL, Redis
• RabbitMQ, gRPC, HTTP, Protobuf, Json
• Kotlin Coroutines, reactor
• JUnit, mockk
• Docker, Kubernetes
• Grafana, Prometheus, ELK, Greylog
• Gradle, GitLab

Obligations

• Choose, analyze, implement new technologies such like Redis, Hazelcase, TimeScaleDB, JobRunr and so on;
• Build a microservice system;
• Implement of services includes database schema development, implementation of the logic, and writing of OpenAPI specification;
• Collect requirements for complex business features, analyze and write tech documentation;
• Optimize microservice jvm services;
• Perform interviews on junior, middle, and senior positions;
• Perform speeches at internal meetings;
• Perform code reviews and helping colleagues.

Key achievements

• Implementation monitoring service by myself from scratch. It implements the logic for collecting a network device’s metrics by SNMP protocol, discovering network devices and device entities (like interfaces, SLA tests, and so on).
• Optimization of a lot of services:
• I accelerated a request to a database that chose the metric’s list for collecting, and that also reduced the load on him;
• I reduced the load on network and network devices from 20k RPS to 4-5k RPS for tasks on a collection of metrics without damage to business functional;
• I reduced the time of requests to a cache in parallel from 100-500ms to 1-10ms.
• Implementation task manager service for management of network devices (for example, restart, firmware upgrade, apply the configuration, and so on) by myself from scratch;
• Implementation service for negotiation with extended application that performs Ansible playbooks by myself from scratch;
• Implementation service for storing and delivery of firmware files by myself from scratch.

Department Assistent in NSTU

9 month from January to October 2022.

Obligations

• Compilation of work programs;
• Conduction seminars on computer science for students on the business direction.

Key achievements: I compiled the work program for “Data Warehouse” course.

Side-Projects

• BravoTelegramStockTagNews, Kotlin, Ktor, Exposed, Angular - github.com/hegemonies/btstn
• Alarm bot for telegram, Kotlin - github.com/hegemonies/alarm-bot
• SNMP Browser, Golang - github.com/hegemonies/snmp-browser
• Welcome Local Page, Ruby, RubyOnRails - github.com/hegemonies/welcome-local-page
• Short URL service, Python, Flask - github.com/hegemonies/short-url-service
• Game Picker, Kotlin, Spring - github.com/hegemonies/game-picker

Education

SibSUTIS (Siberian State University of Telecommunications and Informatics)

• Novosibirsk, 2020, Bachelor’s Degree of Computer Science.

The theme of the diploma: “Development of a microservice for storing and delivering of firmware files”.

Languages

• Russian - Native
• English - B1+, CERF Certificate

Interests

• Reading news from software and hardware sphere;
• Writing of side-projects;
• Drinking good filter coffee.