Артем

ARTEM FEDOROV
Backend Software Engineer • Java / Kotlin / Spring
Kyiv, Ukraine • [open contact info](look above in the "contact info" section) • [open contact info](look above in the "contact info" section)
github.com/Acheron1232 • [open contact info](look above in the "contact info" section)

SUMMARY
Backend engineer with 2+ years building distributed Java/Kotlin systems on Spring Boot. Delivered production CDC pipelines
(Oracle → MongoDB via Debezium/Kafka) for healthcare data, designed OAuth2 security layers with Spring Authorization
Server, and operate self-hosted infrastructure on Oracle Cloud ARM64 and Hetzner. Focus on event-driven architectures, ob-
servability, and pragmatic consistency / latency / throughput trade-offs.

TECHNICAL SKILLS

Languages Java (primary), Kotlin, TypeScript, SQL, Bash
Frameworks Spring Boot, Spring Security, Spring Cloud Gateway, Spring Authorization Server, Spring Data
JPA/JDBC, Spring Batch
Data & Msg Apache Kafka, Debezium, PostgreSQL, MongoDB, Oracle, Redis
Infra & Cloud Docker, Traefik, Nginx, Coolify, GitLab CI/CD, OCI ARM64, Hetzner, AWS, Prometheus, Grafana
Practices Event-driven architecture, OAuth2/OIDC, CDC pipelines, RAG/LLM integration, microservices, ob-
servability

EXPERIENCE

Java Developer — Quince (Outsourcing Software Development) Jan 2024 – Present | Remote, UA
Healthcare Data Migration — Real-time CDC Pipeline (Oracle → MongoDB)
• Designed and implemented CDC pipeline processing ∼1,200 events/sec at peak via Debezium and Kafka with at-least-once
delivery; reduced read latency by ∼62% vs legacy join-based queries.
• Built idempotent consumers with custom aggregations, dead-letter queues, and retry policies; sustained 99.4% pipeline
availability over ∼14 months in production. Stack: Java 17, Spring Boot, Kafka, Debezium, MongoDB, Oracle.
Internal AI Tooling — Pitchbook Financial Data Platform
• Designed internal AI agent automating micro-frontend scaffolding; reduced boilerplate setup from hours to minutes per
module.
• Configured Spring Cloud Gateway as edge layer with JWT propagation and rate-limiting filters between host app and down-
stream microservices.
E-commerce Platform — Payments & Security Architecture
• Led backend for payment/logistics integration with idempotent transactions preventing double-charging under retries; im-
plemented OAuth 2.0 via custom Spring Authorization Server.
• Integrated LLMs with Vector Stores for RAG-based product search; configured AWS CI/CD with Prometheus/Grafana and
SLO-based alerting on p95/p99 latency.
Java Developer — Independent Projects & Hackathons 2023 – 2024
• INT20H Hackathon Winner (1st Place, Web) — architected winning Java backend under 24h constraints. Built scalable REST
APIs and auth flows for early-stage startups.

PERSONAL & HOBBY PROJECTS
• E-commerce Platform (self-hosted) — Production deployment on Hetzner Ubuntu: Docker Compose stack, Nginx reverse
proxy, automated Let’s Encrypt SSL via certbot, PostgreSQL 13. Full ownership from infrastructure to backend to domain &
DNS management.
• Self-Hosted Developer Platform (OCI ARM64) — Coolify PaaS on Oracle Cloud Ampere with Traefik/PostgreSQL/Redis;
Coder remote dev environment; Telegram-bot-controlled Claude Code agent with tmux persistence for remote task execution.
• Spring Authorization Server — custom OAuth2/OIDC provider: Authorization Code Flow with PKCE, refresh token rota-
tion, JWT resource server integration.
• Contract-First API Mock (Gradle Plugin) — generates Javalin mock servers from OpenAPI specs, enabling parallel fron-
tend/backend development.

EDUCATION & LANGUAGES
BSc in Software Engineering — National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” 2022 – 2026
Relevant coursework: Distributed Systems, Algorithms & Data Structures, Databases, Operating Systems, Computer Networks.
Languages: Ukrainian (Native) • Russian (Native) • English (B1, improving toward B2)