Андрій

Employment History
Volpis company
JANUARY 2025 - JUNE 2026
Project: Large-scale telephony platform – call center & VoIP management
Built and maintained a NestJS backend for a telephony platform handling high-volume call events
and agent operations for VoIP-based call centers (PostgreSQL + Redis).

Andrii Silich Designed a modular architecture (15+ modules) covering agent management, queue distribution, call

Fu l l - S t a c k De v e l o per routing, authentication, call recording metadata, and real-time call monitoring.
( J a v a | J a v a S c ri p t) Integrated with SIP-based telephony infrastructure (Asterisk / FreeSWITCH) to process call events,
Details agent states, and queue assignments.

Via Mercato 17 Implemented call processing logic including queue distribution, agent availability tracking, call state

Italy, Sassari, 07100 transitions (ringing, answered, wrap-up), and failover routing.

[відкрити контакти](див. вище в блоці «контактна інформація») Developed real-time CDR (Call Detail Record) processing, implemented low-latency routing and

[відкрити контакти](див. вище в блоці «контактна інформація») queue logic using Redis caching to ensure fast agent selection under high concurrency.

NATIONALITY GlobalLogic community
Ukrainian NOVEMBER 2022 — DECEMBER 2024
Project: Sagemcom — Telecom / CPE Management platform
Developed and maintained Spring Boot APIs for gateway and CPE management aligned with Wi-
DATE / PLACE OF BIRTH
Fi 6E, EasyMesh, and TR-069/TR-369 standards.
29.12.2001 Lviv
Optimized SQL-heavy backend services (indexes, joins, transaction boundaries), improving
Links
latency and stability under high device concurrency.
LinkedIn Instagram
Built telemetry and log ingestion pipelines using Avro schemas for efficient downstream
Skills processing.
- Languages: Java/Scala, Implemented RBAC and operator-level access control for ISPs and support teams managing
JavaScript (ES6+), TypeScript, customer gateways.

Python
Supported backend APIs for mesh topology, firmware metadata, and device configuration state
synchronization.
- Back-end Frameworks:
PalWallet Exchange
Spring/Spring Boot , NestJS,
SEPTEMBER 2021 — NOVEMBER 2022
Express.js Project: Decentralized Cryptocurrency Exchange — FinTech
- Front-end: React.js, NextJs, Designed low-latency Java WebSocket services for real-time market data and order streams,
sustaining 5k+ TPS.
Angular, Bootstrap, Material UI
Implemented Kafka-based event pipelines for trade execution, balance updates, and system alerts
- Databases: PostgreSQL, MySQL,
with ordering and idempotency guarantees.
MongoDB, Apache Cassandra/H2 Secured APIs using JWT authentication and role-based authorization for trading and account
-Architecture & Patterns: operations.

Microservices | Event-driven |
Built transactional trade flows ensuring consistency between order matching, ledger updates, and
settlements.
- DevOps:
DDD Docker,
| CQRS Kubernetes,
| API Gateway
Contributed to audit and monitoring streams for compliance and downstream analytics in a
GitHub Actions, BitBucket regulated fintech environment.
Pipelines Vitech experience
JUNE 2020 - SEPTEMBER 2021
- Cloud Services: AWS (Lambda,
Project: Philips Healthcare — Smart Devices & Remote Monitoring
S3, EC2, RDS), GCP
Developed Spring Boot APIs for ingesting and synchronizing data from 500k+ active
-Design: REST, GraphQL,
healthcare devices.
WebSocket Built device data pipelines for vitals and telemetry with validation, normalization, and
- Testing: JUnit/Mockito schema versioning.
Introduced async processing with Kafka, reducing API response times by ~30% under
peak ingestion.
Optimized persistence using Hibernate/JPA tuning, batching, and query refactoring,
improving DB performance by ~40%.
Ensured HIPAA-aligned security with Spring Security + OAuth2, audit logging, and least-
privilege access control.

Education
Lviv Polytechnic National University
2019-2023, Bachelor Specialty: software engineering