Ivan V. Profile

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$10 USD / hour

warszawa,

poland

$10 USD / hour

It's currently 1:02 AM here

Joined March 14, 2024

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Ivan V.

@Ivan0512

0.0

(0 reviews)

0.0

$10 USD / hour

warszawa,

poland

$10 USD / hour

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Java expert | Algorithms | Concurrency | Backend

Professional Java development for 10+ years. Expert level in Core Java, deep understanding of both «Java Concurrency in Practice» and Java Memory Model. Solid knowledge of algorithms and data structures with their complexity. Large experience of memory and performance profiling. Basics of Scala. Knowledge and experience with BigData ecosystem (Spark, Hadoop). Multidimensional OLAP, ActivePivot. Ability to write nice, clean, extensible, robust code. UML, solid understanding and ability to apply OOP design patterns. Sense of quality, large experience in testing (unit, integration tests, code coverage and performance profiling). Experience with containers (Docker, K8s). Good knowledge of Linux, fluent Bash scripting. Cloud technologies (AWS, Azure). Experience of successful technical leadership in small teams. Practical knowledge of agile processes. Open and clear communication. Ability to observe and decompose tasks, formulate the completion criteria, estimate real duration, track the progress. Ability to write nice and clear documentation, to present the results. Vision of customer's demand, good usability expertise.

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Experience

Syncron

Nov 2022 - Mar 2024 (1 year, 4 months)

Work on “Inventory” product, Extensible Forecasting team, main task was to export some data from Inventory monolith as data mesh data products, invoke a Machine Learning Forecasting, and import the results back. Designed, implemented and integrated Change Data Capture (CDC) Versioning Library – business versioning of changes exported via CDC. (Java 17, Spark, DeltaLake, testcontainers, Docker, lockalstack, AWS, Postgres)

TomTom

Nov 2019 - Nov 2022 (3 years)

High-Definition Map is a TomTom project providing very high accuracy (up to 10 cm) Map for Autonomous Driving. Open Map is an attempt to make an OSM (Open Street Map) based product enriched with TomTom data. Geometrical tasks, performance profiling. (Java, Postgres, PostGis, QGis, Geotools, Docker, Kubernetes, AWS, Azure)

Luxoft Poland -- City Group

Nov 2018 - Sep 2019 (10 months, 1 day)

One Analytics project is to develop a platform for CITI trades and equities platform using Big data analytic for producing market trends for various investments and flows. The architecture involves consuming trades, quotes from external system and storing into Kafka topics, processed by calculation engines. Designing of financial data processing topologies and pipelines. Implementation of financial data processing topologies. Performance optimization. (Kafka, Storm, Spark, HDFS, Redis)