Максим

MAKSYM HOHULIA
Python Backend Engineer
Warsaw, Poland | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section) | GitHub | LinkedIn
Full access to Polish labor market (UKR Status) • Student (<26, eligible for student tax exemptions / B2B)
SUMMARY
Warsaw-based Python Backend Engineer with ~2 years of experience building asynchronous APIs (FastAPI, Async
SQLAlchemy 2.0) and event-driven backends (Redis Queues, Pub/Sub, WebSockets). Proven track record delivering
commercial MVPs, architecting decoupled background pipelines for ML workloads, and resolving database
concurrency bottlenecks. Available for full-time (40h/week) roles.
SKILLS
• Languages & Core: Python 3.11+, SQL (PostgreSQL, MySQL), Bash, Linux (Ubuntu).
• Backend & Async: FastAPI, Async SQLAlchemy 2.0, Alembic, Pydantic v2, Redis (Queues, Pub/Sub), WebSockets,
Celery.
• Architecture & Reliability: Event-Driven Systems, Microservices, DDD, Concurrency (SELECT FOR UPDATE),
Tracing (correlation_id).
• DevOps & Testing: Pytest, Testcontainers, Docker, Docker Compose, CI/CD (GitHub Actions), uv.
• Languages: Ukrainian (Native), English (C1 — Fluent), Polish (A2).
WORK EXPERIENCE
FREELANCE BACKEND ENGINEER (CONTRACT) | Warsaw, Poland
03.2026 – Present
Delivered scoped backend architectures and technical MVPs under NDA for early-stage teams.
• Event-Driven ML Pipeline: Eliminated HTTP timeouts during long LLM inferences by implementing an async Redis
queue returning 202 Accepted, with results streamed via Redis Pub/Sub and WebSockets to prevent client socket
blocking.
• Distributed Tracing: Standardized cross-service observability by propagating correlation_id through HTTP headers,
message queues, and structured logs, cutting root-cause debugging time across microservices.
• IoT Telemetry Framework: Authored an extensible MQTT framework with device emulators for cloud stress-testing;
prevented out-of-order states using transactional transaction_id ACK checks and retain packet expiration.
• Reliability & Testing: Resolved sensor signal jitter via timer-reset debouncing; built isolated integration test suites
using Testcontainers and Dockerized brokers for deterministic CI runs.
MEDUZZEN | Kyiv, Ukraine (Remote)
Junior Backend Developer | 09.2025 – 02.2026
Co-engineered the core backend MVP for a commercial quiz platform alongside a Senior Engineer.
• Engineered the core domain logic and RESTful endpoints using FastAPI and Async SQLAlchemy 2.0 (DDD layers).
• Eliminated TOCTOU race conditions and duplicate attempt creation under concurrent clicks via pessimistic row
locking (SELECT ... FOR UPDATE).
• Prevented breaking active tests by architecting an immutable copy-on-write versioning flow (is_published=True draft
cloning).
• Unified Auth0 and local JWT auth models into a clean UUID schema using deterministic UUIDv5 hashing without
junction tables.
• Implemented Redis caching and rate limiting on hot query paths, reducing redundant database roundtrips.
NTU KPI (APPLIED RESEARCH & DEPARTMENT PROJECTS) | Kyiv, Ukraine
Backend Software Developer | 01.2025 – 08.2025
Engineered internal automation and integration tools according to department specifications.
• Designed relational schemas in PostgreSQL and managed automated database migrations with Alembic.
• Built automated two-way synchronization with Google Calendar API using OAuth 2.0, handling token refresh and
timezone offsets.
• Containerized services with Docker Compose and wrote end-to-end integration test suites using Pytest.
EDUCATION
B.Sc. in Software Engineering — National Technical University of Ukraine "KPI" (Remote, Expected 2027)
• GPA: 3.6 / 4.0 | Relevant Courses: Algorithms, Operating Systems, Database Management Systems, Distributed
Systems.

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procesów rekrutacyjnych zgodnie z Rozporządzeniem (UE) 2016/679 (RODO).
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recruitments under Regulation (EU) 2016/679.