Kyiv · $3500 · 4 years of experience · Upper Intermediate
Got experience in: • Big Data - 2.5 years(pipelines migration from old tech(Hadoop, Hive) to the new one(Spark, Airflow, BigQuery SQL), new ETL pipelines development from scratch; • Backend development (Java and Spring) - 1.5 years - shipped to production cloud microservice system for US legal firms; designed and implemented the main part of the new REST API for the R&D company in the automotive area. Got experience in interviewing(around 10 persons). Programming languages: Java, Scala, Python DB: Relational(Postgre), Non-relational(HBase, BigQuery) Tools: Spring, Hibernate, Hadoop, Spark, Kafka Processing engines: Airflow Version control systems: Git Build tools: Maven, Gradle Cloud Platforms: a little bit of GCP, a little bit of AWS
Java, Spring, Maven, Hibernate, Git, Scala, HBase, Hive, Apache Spark, Python, Big Data, Hadoop, PostgreSQL, Kafka
Like to do performance optimizations in bottleneck areas of systems/application, so already decreased execution time (30-300 %) or resource usage(20-40%) for a few web apps/ETL. Helped in DWH migration(about 1000 tables) from different data sources to new DWH on top of BigQuery. Like to do and have experience in software design.
I'm looking for an interesting project and ready to deal with back-end or data processing. Not interested in Java EE legacy project or front-end development. The most desirable project will be the one with a cool team and interesting domain area. Ready to start in the next week, maybe ASAP(but I am not sure for 100%)
Kyiv · $6000 · 9 years of experience · Advanced/Fluent
- Python, Scala, Java, Go, C\C++ - distributed systems - large-scale data engineering (pipelines, data lakes, data warehouses, data marts) - data science experience - cloud infrastructure (AWS, k8s, etc) - SQL / NoSQL - excellent communication skills
Distributed Systems, Python, Scala, Data Engineering, Machine Learning
- Work experience at a top tech company in SF Bay Area - Work experience at a fast-growing startup in San Francisco - Author of a popular open-source project.
An interesting and challenging job with great people. No monkey jobs and consulting please. Thank you!
Kyiv · $5000 · 10 years of experience · Upper Intermediate
For the last five years I working with Scala projects in position of lead developer. I have successfully delivered a number of web products and services. Libraries I use is bare minimum for task to be solved, namely akka-stream, akka-cluster, key-value store, zio.
Scala, Akka, NoSQL, Haskell, Java, Functional programming
Latest achievement I have is gradual migration of project which had required a dozen of senior developers to simpler solution which now can be maintained by couple of middle ones. All changes were done on production systems and clients have very positive feedback about changes. Bugs and performance issues have become a rarity. Along the way the product expanded its functionality and introducing of new features takes of magnitude less time now.
• no big data • work-from-home anytime • compensation in usd/eur
Kyiv · $6500 · 7 years of experience · Upper Intermediate
Feb. 2019 – present time: Big Data Engineer with Java/Scala * Java 8, Spring Boot, Scala 2.13, Hadoop (HDP), Spark (Structured Streaming), Kafka, Cassandra (DSE), Solr, Linux, Git, Gradle, bash scripting; * developing, testing and maintaining data pipelines for ingesting, processing and storing data in a production system built on top of Big Data and Microservices symbiosis; * creating Microservices with the Java 8/Spring Boot/REST stack, that interact with Kafka, HDFS, Cassandra storages and cloud services; * creating, monitoring and maintaining Spark on YARN jobs for both batch and streaming data processing; * creating and maintaining Jenkins jobs for CI/CD pipelines; * writing Scala runners and bash scripts for performing ad-hoc tasks, such as loading data from a cloud service into Kafka; streaming data from HDFS to a REST endpoint; sending test data into Kafka; filtering, grepping and loading data to/from HDFS; * participating in PoC projects; * writing technical documentation, creating system design and data pipelines diagrams. Feb. 2018 – Feb. 2019: Java Developer with Big Data * Java, Hadoop distributions (Cloudera, HDP), Spark, Beam, Kafka, AWS, Kerberos, Docker, Linux; * configuring and using Hadoop distributions running in Docker for development and testing; * working with AWS Management Console for creating and configuring clusters (S3, EMR); * participating in technical meetings with developers from other vendors; * writing technical documentation; Jan. 2017 – Feb. 2018: Java Developer * Java 8, Spring (Data, MVC), MySQL, JUnit, Mockito, Cucumber, Maven, Git; * developing, testing and maintaining data and service layers for RESTful services; * writing Cucumber tests; Jun. 2015 – Oct. 2016: Java Trainee/Junior Java Developer * Java 7/8, Spring, MySQL, MongoDB, Servlets, JSP, Bootstrap, Tomcat, Maven, Git; Jun. 2013 – Jun. 2015: Content Manager, Webmaster * HTML, CSS, Bootstrap, jQuery, PHP, Git;
Scala, Apache Spark, Kafka, Cassandra, Gradle, Distributed Systems, Git, Design Patterns, Linux, Docker, Hadoop, ScalaTest, Akka Actors, Cats, Lua, Apache Beam, AWS, Solr, Functional programming, Akka HTTP, Google Cloud, Akka Stream, Kafka Streams
I'm a software engineer with a strong background in modern backend technologies and a keen desire to continue improving my knowledge and skills in Scala and Big Data. The GoF Design Patterns help me make a flexible and maintainable design, the principles of Clean Code and FP guide me to write concise and readable code, IoC makes my code loosely coupled and testable, and TDD guarantees that the code does what it's expected to do. I’m a good team player and I always do my best to answer questions and share my knowledge with other team members. I reviewed the existing data model of the main storage, investigated and proposed changes according to the best practices of the Cassandra data modeling in order to improve query performance. I used optimization techniques to improve Spark job performance and in some cases eliminated OOM errors. I've acquired hands-on experience with multiple distributed systems and technologies during: * participation in multiple PoC projects; * taking part in technical discussions with other engineers and the DevOps team about the proper configuration of Kafka, Cassandra and Spark clusters; * investigating problems in production data processing pipelines built on top of Microservices and Spark streaming jobs.
I have a passion for functional programming and distributed systems, so I’m looking for a project that would benefit from my knowledge and skills in a Scala ecosystem (Akka, Cats) and a wide range of modern fault-tolerant, scalable systems for building real-time high-load applications (Spark, Kafka, Cassandra, Solr, AWS, GCP). Such a project would be developed by a team adhering to the best practices and methodologies of software design and development. I’m a quick learner and curious to learn new technologies, especially in the areas of streaming stateful processing (Flink) and performing analytics on large volumes of data (ML, Deep Learning).
Kyiv · $400 · Less than a year of experience · Upper Intermediate
2018/Summer 2019 - A lot of small pet projects with Spring Framework stack, mostly done to learn something about framework. Summer/2019 - Demo game that demonstrates V2G technology.(unfinished due to leaving team lead from the project) some working experience at freelance (fix bug, add new functionality etc). Some deployed learning projects with Vue.js and Spring framework. Experience with telegram bots. 2019/2020 - Mostly pet projects with Vue.js and REST, currently working at web-site for my university. Experience with Scala and Kotlin.
Java, Spring, Hibernate, Maven, Git, SQL, JUnit, JPA, REST API, Design Patterns, OOP, REST, Linux, Gradle, Spring Core, Spring MVC, Vue.js, Angular
Interesting project with strong team and perspectives.
Remote work, Ukraine · $1000 · 5 years of experience · Upper Intermediate
Dec 2018 – Present: Senior Scala Developer at Inscale: all kinds of software development: code, architecture, testing, meetings, code review, etc. Tasks: new features, bug investigation/fixing, components version upgrade. Dec 2016 – Nov 2018: Senior Scala Developer at Luxoft: take part in scrum meetings (grooming, huddle, retrospective), software development (backend, sometimes frontend), take part in architecture planning meetings, testing (unit, integration, load), SBT migration and support. Feb 2014 – Nov 2016: Java/Scala Developer at Anadea Inc: collect and analyze customer’s requirements, write user stories, plan development roadmap, software development (DB structure, backend, sometimes frontend), testing (unit and acceptance), production support.
Has developed a site with WebRTC video calls. My role in that project was Backend developer/Lead developer. I have started a migration from Maven to SBT on one project. I have developed 4 SBT plugins to cover missed functionality. In general, I have migrated by myself more than half of projects microservices (about 7 repos).
Looking for a part-time job (10-15 hours a week). The desired salary is ~1000 a month. I'm ready to do any job, but Scala is preferable. Also interesting in Kotlin, Python and JS.
Kyiv · $4000 · 3 years of experience · Upper Intermediate
• Migrated several data pipelines of the recommendation system for one of the biggest US retailers. • Brought to the production stage cloud platform for legal firms processes automation. • Interviewed about 10 persons at coding interview and a few at system design interview. • Designed and developed new more stable and productive REST service for metrics at automotive startup; helped them with improvement of existing data pipelines and REST services. • Helped with the redesign of AT&T DirecTV set-top boxes firmware(business logic and UI part). Programming languages: Java, Scala, Python DB: Postgres, HBase, Impala, Hive, BigQuery Technologies/Frameworks: Spring(Boot, Core, Data, Security, Cloud), Hibernate, QueryDSL, Hadoop, Spark, Kafka Processing engines: Airflow, Azkaban SCM: Git, Mercurial Build tools: Maven, SBT, Gradle Cloud Platforms: AWS, GCP Jenkins
Fully designed and partially implemented new version of company's key REST API which caused average response time decrease by 70%. Designed and implemented object's changes metadata provider library based on Javers for event sourcing. Rewrote few data pipelines from Spark/Pig/Bash to Airflow + GCP Migrated data from about 50 relational databases to bigquery
I am seeking interesting challenges and abilities for professional/experience growth. Interested in data processing systems, highload systems with microservice architecture. Interested in projects, participation in which can level-up my engineering practices and apply knowledge of advanced algorithms and data structures.
Remote work, Ukraine · $4500 · More than 10 years of experience · Upper Intermediate
- 10+ years of experience including 7 years of java and about 2.5 years of Scala. - High level of Scala and good level of FP (can deal with Free Monads if needed) - Experience in tech leading. - Can start working with any scala tech in a short period of time.
Java, Scala, SQL, Spark, Cats, ZIO, Functional programming
- Designed and developed integration testing framework from the scratch with one more team member. - Took over technical leading role from previous lead on project consists of 3 developers. - Played tech lead roles in two more projects. - Good reputation on StackOverflow
- Functional programming libraries like cats, zio, fs2 etc. Or strong willing to move toward FP approach. - Context switching safety - Backend only. - Not banking domain. - Only scala. Not java + scala. - DDD would be nice. - Looking for company where scala and its benefits are used intensively.
Kyiv, Kharkiv · $4500 · 7 years of experience · Advanced/Fluent
Languages: Java / Scala Frameworks and Platforms: akka, akka-http, akka-streams, Spring, Hibernate, ScalikeJDBC, Slick 3, Play 2, AMQP (RabbitMQ), Circe, spray-json, ScalaTest, TestNG etc. DBs: PostgresSQL, MongoDb Cloud: Azure, Amazon S3, Heroku.
Scala, Java, Functional programming, OOP
Zaporizhzhya, Kyiv, Lviv, Dnipro · $400 · Less than a year of experience · Intermediate
Have some non-commercial experience with Scala/Akka/Spark. I have some experience with Golang and Java. Currently, i work as python/django developer and have more than 3 years of experience. During my work carrier I developed different projects: system for medical recommendations; sports betting platform; cybersports events aggregator; rest api for app like Uber; rest api for dating app; etc.
Create a realtime map with indicators of current meetups in the world. For that project, i use Spark and Spark streaming, for web socket connetions - Akka-http. All data are storing in Cassandra with some processing.
Interesting projects with a professional team without frontends tasks.