Position: Expert Java Developer
Company: ciklum.com
Experience required: 5y
English level: fluent

Project description:
Our client is in top-5 largest retailers in the world. We are honored to be a partner to build brand-new eCommerce Marketplace platform and make our client #1 digital eCommerce provider in Europe. We start from 20 mln visitors per month, 10 mln items in catalog in 1500+ product categories, 30 mln product content articles, high demand for search engine optimization and visibility, support of both B2B and B2C, web and mobile, dynamic best-price offering algorithms and so much more capabilities to offer the best user experience.

Our client has incredible expertise in physical sales, as well as successful eCommerce business in Germany. New commercial platform is part of strategic roadmap to bit global marketplace providers like Amazon/eBay and leverage strong world-wide branding, 20+ millions of existing offline clients, dedicated field-force sales in Europe and well-established logistics, delivery and client-support network.

The platform assumes to host 10+ high-load cloud-hosted product applications, managed end-to-end by dedicated teams.

We offer you an agile environment with startup mentality, no bureaucracy, flat hierarchies as well as courage and trust to evaluate new approaches. We value personal interaction so project presumes frequent client visits to Kiev, as well as business trips to Germany for Development team, not just managers.

You will be working in small team of technical experts responsible for development and maintenance of technical infrastructure used by development teams, with the major responsibility for Kafka/Flink in terms of scaling, deployment, enhancements, debugging.

You will work with a technical backlog having developers as a major stakeholders. On top of working on planned product backlog items you will handle the fast lane of urgent topics that are blockers or impediments in keeping the expected pace of product development.

Responsibilities:
Lead and improve the decision-making process in design solution architecture, solution development, architecture and code review
Back-end development to meet customer’s business needs and implement components according to modern software development environment (cloud-based platforms, microservice architecture, etc.)
Develop and review feature design documents and provide inputs/update to specifications for the solution
Design and implement a set of various types of tests (unit, integration, functional, etc)
Proactive position in architecture preparation, solution development, processes improvements
Working in an international distributed team in an Agile environment
Communicate with PMs, engineers, Architects, QA and other colleagues and stakeholders
Delivering the product roadmap and plannings
To use high coding standards, software best practices and write highly testable, automatable and performant code over the whole SDLC

Requirements:
Experience in software development for more than 7 years
Excellent knowledge in Computer Science, Computing Theory:
Paradigm & Principles (OOP, SOLID, DDD, TDD, BDD)
Database theory (RDBMS, NoSQL)
Code testing practices
Algorithms
Data structures
Architectural, Enterprise and Design Patterns
Deployment patterns
Security patterns, Reverse engineering resistance, Common attacks types (OWASP)
Understanding of network interactions:
protocols
conventions (e.g. REST, RPC)
authentication and authorization flows
standards and practices (e.g. oAuth, JWT)
Excellent knowledge and experience in Java (more than 5 years)
Practical commercial experience with:
REST API development
Hands-on experience with Apache Flink
Knowledge of SQL & Table API
Hands-on experience with Apache Kafka
Familiar with Kafka APIs e.g. Producer API, Consumer API, Connect API and other
Configuration e.g. broker configs, topic configs, producer and consumer configs, retention policy
Core Kafka operations
Web application frameworks (e.g. Spring Boot Framework) (more than 4 years)
Testing frameworks (e.g.e.g. JUnit, PowerMock, WiresMock) (more than 4 years)
ORM (e.g. Hibernate) (more than 2 years)
RDBMS (e.g MySQL/MariaDB, PostgreSQL, Oracle) (more than 4 years)
NoSQL (e.g. MongoDB, ElasticSearch, CouchDB)
Search Engines (e.g. ElasticSearch, Azure Search, Apache Solr)
Key-value storages (e.g. Redis, Memcached)
Web Servers
Version control systems (GIT)
Cloud solutions (e.g. AWS, Google Cloud Platform, Microsoft Azure)
Integration with 3rd party solutions
Docker
Continuous Integration tools (e.g. Gitlab Pipeline, Jenkins, TeamCity, Bamboo)
Builders
monitoring, delivery guarantees
Experience with:
Leading a team
Troubleshooting, profiling and debugging of applications
Creation of software architecture and design for complex applications, platforms, microservices solutions
Agile software processes and technologies
Code Review process
Refactoring process
Processing Unbounded and Bounded Data
Leveraging In-Memory Performance
Experienced with ProcessFunctions
Experienced in tweaking configuration
Experienced with Job Manager implementations
Knowledge of typical pitfalls and experience with debugging
Fluent English
Desirable:

Certifications on:
Java
Spring Frameworks
Cloud providers
Kubernetes
Kafka
Delivery processes (SAFe, Agile, etc)
Experience with Leading and Supporting medium to large size solution delivery projects
Understanding of orchestration and containerisation (e.g. Kubernetes, Docker Swarm)
Practical commercial experience with:
Serverless architecture
IAC, Provisioning tools (e.g. Terraform, Ansible)
Quality control tools (e.g. SonarQube)

What's in it for you?
Career growth opportunities
Realization of your innovative ideas in building new Ciklum Solutions and Services
Friendly collaborative teams and enjoyable working environment
Professional skills development and training programs
Variety of knowledge sharing, training and self-development opportunities
State of the art, cool, centrally located offices with warm atmosphere which creates really good working conditions Gdansk or Wroclaw
Work from home/100% remote
Private medical healthcare fully covered by Ciklum with a possibility to cover family members
Fully covered life insurance — 100 000 PLN
Fully covered drug insurance — up to 2 000 PLN/year
Multisport card 100% covered by Ciklum — Benefit Systems, Plus package
Parking space 50% covered by Ciklum