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Achievements

Achievement: Pull Sharkx3Achievement: Galaxy Brainx4Achievement: Pair ExtraordinaireAchievement: YOLOAchievement: Quickdraw

Achievements

Achievement: Pull Sharkx3Achievement: Galaxy Brainx4Achievement: Pair ExtraordinaireAchievement: YOLOAchievement: Quickdraw

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lMysticl/README.md
Fullstack Java Developer. Reliable backend systems. Dark space, Earth and eight orbiting service and technology satellites.

Fullstack Java Developer · Former Java Team Lead · 10+ years of experience

AI Integration & Automation Expert

I build Java and Spring Boot services for payments, e-commerce and document processing: reliable integrations, clear API contracts and maintainable systems. Former Java Team Lead; React / TypeScript when the product needs it. I also build tooling for AI coding agents.

Open to remote Senior / Lead Java roles · full-time or contract · Kyiv, Ukraine (UTC+2/+3)

LinkedIn — Pavlo Putrenkov · Hiring enquiries

Experience

  • Payments and integrations: a distributed, event-driven payment system on Kafka; external integrations and REST API design.
  • Document processing and reporting: services and interfaces that turn documents into usable information.
  • Technical leadership: architecture decisions, code reviews, planning and work with stakeholders.

Core stack

  • Backend: Java 21 · Spring Boot 3 · Spring Cloud · Kafka · RabbitMQ · REST · Microservices · Hibernate / JPA
  • Data and delivery: PostgreSQL · MySQL · MongoDB · Redis · Docker · Kubernetes · AWS · GitHub Actions · GitLab CI · Jenkins
  • Quality and frontend: JUnit · Mockito · Testcontainers · Playwright · Prometheus / Grafana · ELK · React · TypeScript

Selected work

  • DLQDesk — inspect, fix and replay failed Kafka messages with a reviewed preview and a durable delivery history. Java 21, Spring Boot, React, TypeScript.
  • BatchLens — see why a Spring Batch job failed and restart it from its last checkpoint; an open-source console embedded in your application. Java 21, Spring Boot, React, TypeScript.
  • PDF Text Layer Auditor — Java CLI and GitHub Marketplace action that flags PDFs with missing or broken text layers before search or RAG ingestion.
  • ArchVerity AI — IntelliJ IDEA plugin for AI-assisted review of Spring contract changes across repositories. 300+ downloads.
  • Bug Receipt — agent skill that won't call a bug fixed without evidence. Included in GitHub's awesome-copilot.
  • User Aggregation Service — Spring Boot API over PostgreSQL and MongoDB with bounded concurrency, Testcontainers and ArchUnit.

Open source

Before this account I contributed to Broadleaf Commerce as putrenkov: 77 pull requests, 66 merged — for example a historical order purge, domain invariant tests and a multi-catalog persistence fix.

Pinned Loading

  1. pdf-text-layer-auditor pdf-text-layer-auditor Public

    Java CLI that diagnoses missing or suspicious PDF text layers for search, indexing, accessibility, and extraction workflows.

    Java 2 1

  2. user-aggregation-service user-aggregation-service Public

    Java 21 and Spring Boot service that aggregates PostgreSQL and MongoDB users with bounded concurrency, caching, Flyway, OpenAPI, and Docker.

    Java 2