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MAKSYM HARAPKO | [открыть контакты](см. выше в блоке «контактная информация») | [открыть контакты](см. выше в блоке «контактная информация») | LinkedIn | GitHub

.Net Developer, 3+ years of commercial experience

ABOUT
.NET developer with 3 years of commercial experience. Built full cycle of development: from gathering product
owner requirements to establishing fully automated release process with high test coverage, detailed analytics and
CI/CD. Skilled in writing efficient asynchronous code that keeps services responsive and scalable. Comfortable with
deploying, monitoring, and scaling applications in the cloud. Passionate about the newest AI tools and features,
and eager to weave intelligent automation into backend workflows.
SKILLS
C#, Asp.Net Core, LINQ, Entity Framework Core, SQL(MsSQL, PostgresSQL), NoSQL(Redis, MongoDb), REST API,
CQRS + MediatR, xUnit, Git/GitHub/GitLab, GitHub Actions, Docker & Docker-Compose, Kubernetes, Prometheus,
Agile/Scrum, Kafka, AWS S3, Hangfire, Serilog, Elasticsearch, Kibana, Grafana, SignalR, Angular, RxJs
PROFESSIONAL EXPERIENCE
TWNTY Ventures | .NET Developer | Hybrid (Feb 2024 - Present)
●​ Re-architected the core ordering service into event-driven microservices, boosting system throughput by 60 %
and eliminating all release rollbacks in the last two quarters
●​ Integrated Apple Pay and Google Pay on the server side via Stripe, with 25 % user adoption in the first month
and a checkout-conversion jump from 79 % to 86 %
●​ Implemented a blue-green deployment pipeline on GitHub Actions and Kubernetes, shrinking production
release time to eight minutes
●​ Introduced Prometheus + Grafana monitoring that delivered real-time visibility and cut mean time to recovery
from four hours to 35 minutes
●​ Shifted session storage from SQL Server to distributed Redis with key‑expiration, off‑loading 97 % of auth
queries and freeing 40 GB of DB storage.
●​ Implemented SignalR order-status hubs for kitchen screens; reduced “front-desk calls to kitchen” sped up meal
prep starts by ~90 seconds
●​ Added Pact consumer/provider contract tests for 12 APIs, eradicating cross‑service breaking changes for three
consecutive quarters
Stack: .Net 8, Entity Framework Core 8, PostgreSQL, Kafka, Redis, xUnit, SignalR, Docker, Kubernetes, AWS

PettersonApps | .NET Developer | On-site (Sep 2022 - Feb 2024, 1 year 6 mos)
●​ Orchestrated blue‑green deploys with Terraform + Helm, shrinking average downtime per release from
3 minutes to under 10 seconds.
●​ Tuned slow queries with missing composite indexes; occurrences in the PG slow-query log fell -38 % and CPU
utilization on the primary fell -18 %
●​ Automated nightly data-cleanup and archiving; pruned 3 GB of stale logs weekly, shrinking full-backup time 42
min → 18 min
●​ Devised smart rate‑limiting middleware with token buckets in Redis, blocking abusive traffic and dropping 403
errors by 92 %.
Stack: .Net 6, Entity Framework Core 6, MsSql, RabbitMq, Redis, xUnit, Docker, Kubernetes, Azure

EDUCATION

Bachelor of Applied Mathematics| Uzhhorod National University (Ukraine, Sep 2022 - May 2026, Incomplete)

LANGUAGES ​ English B2 • Ukrainian Native