Sergii N

Sergii N

Mentor
5.0
(1 reviews)
US$13.00
For every 15 mins
5
Sessions/Jobs
ABOUT ME
Senior Developer with 12+ years of experience in Java/Scala/Python/Groovy
Senior Developer with 12+ years of experience in Java/Scala/Python/Groovy

I'm Senior Developer with 15+ years of experience.
I enjoy working with amazing teams and companies. New processes, work on modern products, interesting infrastructure, best practices.

I all started as my passion to Z-80 Sinclair with cassette tapes and integrated Basic programming language in 1991. Then was Pascal, Delphi on Pentium-120 in 1995. Things became way better since 2007.

I started my career in Kiev offices working onsite and going for business travels to California, cooperating with customers onsite. Later I enjoyed remote cooperation with awesome existing companies and also fresh start-ups (even building from the ground up and setting up processes)
Always liked to join strong companies and members that make me feel like a newbie )) so I grow to their high standards.
● Having overall 15+ years of commercial software development experience (mostly backend, integrations)
● 6 Years in offices of Kiev biggest companies (EPAM, GlobalLogic) with customers like
Microsoft, T-Mobile, Real Networks, UBS Investment Bank
● 9+ years full-time​ remote with US/Europe-based teams
● Worked on ​Scala​/Java/Groovy/Python
● Developed both services, database layer, complex backend.
● Expertise in ​Scala/Akka,​Java/Groovy,JPA,Spring/SpringMVC,Maven,Hibernate,Unit
testing. Python/Groovy
● Worked in multiple Scrum Teams
● Good communication, proactive and problem-solver.

Dublin (+00:00)
Joined December 2018
EXPERTISE
10 years experience
Since 2007 I'm working on projects that use Java. From JUnit for unit testing to backend and integration solutions, APIs, client libraries.
Since 2007 I'm working on projects that use Java. From JUnit for unit testing to backend and integration solutions, APIs, client libraries.
7 years experience
I dived into AWS by reading developer's documentation for solutions and dived into developing architecture and choosing tools to start-up...
I dived into AWS by reading developer's documentation for solutions and dived into developing architecture and choosing tools to start-up from day one and then grew it and scaled. Used AWS Lambda, S3, Kinesis, Elastic Beanstalk, Elastic EKS, ElasticSearch.
View more
View more
3 years experience
Designed databases, created proper indexes and fine tuned existing solutions for performance.
Designed databases, created proper indexes and fine tuned existing solutions for performance.
10 years experience
Built complex solutions for backend using Spring boot. Before that used spring for 5+ years.
Built complex solutions for backend using Spring boot. Before that used spring for 5+ years.
5 years experience
Used MongoDB on projects that didn't need ACID, but rather had their data growing fast. Used MongoDB atomic functions for counters and ag...
Used MongoDB on projects that didn't need ACID, but rather had their data growing fast. Used MongoDB atomic functions for counters and aggregations to collect/retrieve data. Improved performance by optimizing functions and using indexes where it was necessary.
View more
View more
6 years experience
5 years experience

REVIEWS FROM CLIENTS

5.0
(1 reviews)
sourav Katyal
sourav Katyal
January 2019
Highly skilled and very appropriate in understanding the requirements and completing task.Look forward to work with you.Thanks
EMPLOYMENTS
Senior Scala Developer
Entellect
2021-08-01-2022-02-01
Entellect is a Life Sciences data integration platform that enables insights from data to drive effective innovation. With a modern archi...
Entellect is a Life Sciences data integration platform that enables insights from data to drive effective innovation. With a modern architecture that adheres to FAIR Principles, Entellect facilitates access to clean, reusable data and metadata, enabling R&D scientists to optimize decision making and cycle time. It enables better data governance and helps drive accurate AI/ML based discovery. Responsibilities and Key Accomplishments ● Implemented new data pipeline components ● Bug fixing and refactoring, unit Testing existing components ● Working with AWS infrastructure and Docker/Kubernetes services ● Guiding and helping Junior Engineers
Scala
Docker
Kubernetes
View more
Scala
Docker
Kubernetes
View more
Db Team Ops
Cyr3con
2020-09-01-2021-07-01
CYR3CON started with a simple premise – what if, rather than playing catch up, we could predict where the next attack might occur? This d...
CYR3CON started with a simple premise – what if, rather than playing catch up, we could predict where the next attack might occur? This deceptively simple idea is now supported with multiple patents, new algorithms that live up to the AI hype and a dedicated and determined team that make it all. Responsibilities and Key Accomplishments ● Reliability and scaling of MongoDb clusters ● Working with AWS infrastructure and services ● Reviewing code of db clients across other teams ● Monitoring, maintaining linux machines ● Setting up alerts and monitoring and scaling resources ● Refactoring and profiling code for efficiency ● Unit Testing, Performance testing and improving architecture
MongoDB
Linux
View more
MongoDB
Linux
View more
Senior Scala Developer
TradeCloud
2018-09-01-2020-09-01
TradeCloud is a leading supply chain platform for manufactoring and wholesale companies. - One platform for real-time supply chain collab...
TradeCloud is a leading supply chain platform for manufactoring and wholesale companies. - One platform for real-time supply chain collaboration - One network for connected buyers and suppliers - Buyers and Suppliers rely on Tradecloud to make their global supply chain predictable and increase margins Responsibilities and Key Accomplishments ● Implement and enhance Akka/Scala Services ● Implemented User and Authorization service ● Refreshed and adjusted Go-lang Third-party integration service ● Implemented Kafka-based integration and Buy/Sell/Shipping services ● Participated in daily scrum calls and coordinated work with CTO/Architect.
Python
Scala
MongoDB
View more
Python
Scala
MongoDB
Redis
Cassandra
Elasticsearch
Akka
Microservices
Go
View more