Hi, I'm Adam Kopeć!

• Development of a few microservices in Scala (circe, akka-http, cats, zio, scalatest + Kafka, Redis, Cassandra, PostgreSQL) – in general working with Scala for 90% of the time,
• Design of a configurable business process engine in Scala for a multi-tenant application,
• Design of a modern, reactive API using Java 11, Spring Boot, Spring Cloud components.
• Applying production-ready practices for high traffic – circuit breakers, monitoring, logging, tracing etc.
• Working on CI/CD pipelines architecture (Amazon EKS, Kubernetes, Helm, Kaniko, Gitlab CI),
• Analyzing business requirements, conducting interviews, running demos for management

• Leading the team of 8 people (responsible for development and maintenance of existing platform),
• Playing the architect role in a new, more modern project (developed by ~5 people, dealing with high volume of data and challenging SLA) – drawing diagrams, analyzing requirements and available tools, assessing risk, consulting with the development team and business analysts,
• Supervising and analyzing the impact of design changes made to the existing, legacy system,
• Gathering and analyzing business requirements, negotiating scope with business representatives of different company units and other teams,
• Successful introduction of the event storming practice to the company,
• Making code reviews, mentoring team members, making them familiar with the company business model and its technical practices, interviewing candidates,
• Communicating with external companies (data suppliers) and contractors,
• Popularizing the usage of Kubernetes in the company, refining CI/CD processes

• Java 8 and advanced SQL Server programming,
• Implementation of a large business application that was loading complex data structures into the system (more than a year of development, >50k LOC written alone),
• Technical design consultations (especially regarding lowering of the cross artifact dependency level, introduction of internal libraries, versioning scheme etc.),
• Debugging, analysis and refactoring of internal concurrency related algorithms and tools,
• International business and architectural meetings participation (in english),
• Supervising external contractor teams, defining requirements and making code reviews,
• CI/CD pipeline configuration (git, svn, maven, jenkins, gitlab),
• Participation in a group which aimed to introduce Docker and Kubernetes to the organization

• API development (from scratch in Java 8 on Spring Boot) – I was responsible for all architectural concerns (documentation maintenance and versioning, package structure, logging, cross-service request identification in logs, versioning, rate limiting etc.) and most of coding. I used Redis, Kafka, Apache Phoenix for HBase etc.
• Third party integration development (connected with payment collection and real-time data aggregation),
• Java services development (different features added to existing projects),
• Infrastructure automation with Ansible (provisioning, deployment and build scripts),
• Jenkins pipeline configuration,
• PHP application structure normalization (Vagrant introduction, build script creation, test reorganization),
• JavaScript widget development (sophisticated dynamic forms, written mostly in Backbone + Marionette) and some node.js development (mostly tools and fixes for existing services),
• Training of junior developers and interns, team mentoring, development workflow consultation.

• Playing a lead architect role in a team that worked on company’s flagship product – an in-house e-commerce platform. My work has been focused on transition from dedicated solution, that had to undergo major changes from project to project, into a framework with a consistent, but customizable domain model, that could handle many conceptually different systems.
• Participation in technical meetings with customers,
• Making diagrams and writing documents about the architecture,
• Training of junior developers,
• Knowledge crunching with customers, writing proposals, project boundary negotiations.

• Implementation of customer’s performance problem solution. Major architectural leap from ad-hoc, stored procedure-based calculations to an asynchronous, messaging-based solution built on the top of RabbitMQ. Development of a custom intermediate data generation algorithm for effective caching.
• Project and implementation of a sophisticated loyalty point calculation program, in some ways similar to Payback™. Project consisted of a calculation engine and an intuitive GUI written in JS, which provided a way to enter even very complex, custom rules.
• Project and implementation of an automated tool, that was able to merge product catalogs from many vendors. It was capable of handling many different protocols, mainly EDI-Wheel, EDIFACT INVOIC, SOAP and Xpartner. Challenges: queueing systems, different data models, event-driven programming, big range of data,
• Activities aimed at modernization of the company’s software development methodology. Introduction of formal code reviews and build automation procedures based on Phing and Jenkins.
• Conducting weekly internal trainings for coworkers. Topics: software engineering, Domain Driven Design, new technologies, elegant design patterns etc.

• Programming of e-commerce platforms and dedicated systems for key customers.
• Implementation of integration solutions and business rule modeling.
• Spreading of good software engineering practices: unit testing, object oriented design, refactoring.
• Extending the company’s framework with a DI container, event bus and other components.
• Maintaining legacy systems.

• Development of dedicated systems, challenges: XML-RPC, AMF, Lucene, Facebook API, Google Maps API, automatic e-mail responders, PDF generation, web-crawler design, payment systems integration (payu.pl, dotpay.pl) etc.
• Web server administration – deployment, PHP and SQL optimization, domain management.
• Main projects: http://pokaz.to/, http://www.preseller.pl/, http://frauscherboats.pl/, http://www.mountainapartments.pl/, http://ibhp.pl/, indexo.pl homepage and many automated SEO tools

Web programming with HTML, CSS and JS, SEO tools development