Andrii PohuliailoSenior Backend Engineer
[email protected]

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career

  1. present· Kyiv

    Delasport

    Team Lead

    • Lead a dual-stack (PHP/NestJS) team of 3 backend engineers building a large-scale data collection platform
    • Align technical execution with product roadmaps, working with product managers, management, other teams, and stakeholders, and taking part in technical discussions and decisions
    • Mentor engineers through code reviews, growth plans, and regular 1:1s, and take part in technical interviews
    • Introduced an AI-assisted development workflow based on spec-driven development (SDD), changing how the team designs and delivers features
  2. · Kyiv

    Delasport

    Senior Backend Engineer

    • Architected a high-concurrency data collection platform in PHP and NestJS, designed for reliability at scale
    • Built integrations with external data sources, delivering fresh data in near real time with low latency during peak load
    • Refactored heavy MySQL queries and optimized traffic distribution, improving API latency under peak load
    • Implemented Prometheus and Grafana monitoring for data collection node health and success rates, cutting incident response times
  3. · Kyiv

    WhiteTech

    Senior Backend Engineer

    • Owned the internal charges system as the main developer, processing 1.5M+ customer charges a month within a fintech payments platform handling 1M+ transactions a day
    • Extracted the charges module from a legacy monolith into an independent microservice, adding new features and supporting it in production as the sole developer on it
    • Ran Domain-Driven Design sessions with business analysts and rebuilt the domain on DDD, Clean Architecture, and CQRS, improving maintainability and performance
    • Built the charges microservice on the platform's existing Event Sourcing architecture for asynchronous distributed events and data auditability
  4. · Winnipeg, Canada

    Pepper

    Backend Engineer

    • Designed and built, as part of the team, the microservices that serve an in-house TensorFlow model in real time for spam detection, offensive-content filtering, and automatic deal categorization
    • Integrated the model into the content moderation and classification pipelines of a deals platform with 25M+ monthly active shoppers across 10+ localized country sites
    • Automated first-pass moderation so that 70% of cases were resolved automatically with high confidence, leaving only the more complex cases for manual review
    • Automated the preparation of training datasets from previously moderated and categorized deals, and took part in training the model
  5. · Kyiv

    Newfold Digital

    Backend Engineer

    • Owned the backend of the resellers system on a high-traffic platform serving 100,000+ active resellers, as the main backend developer
    • Migrated the system off legacy code page by page and section by section with zero downtime, then retired the old system once the migration was complete
    • Introduced Clean Architecture and Domain-Driven Design (DDD) to modularize the codebase
    • Designed and built the backend of a website builder that lets resellers customize their storefront websites, with an architecture that decouples customization from the frontend, so the frontend team no longer needed backend help with customizations
  6. · Kyiv

    Slotegrator

    Backend Engineer

    • Engineered and refactored ~5 payment provider integrations for a fintech payment processing platform connecting 50+ providers across multiple countries, including the M-Pesa mobile money service and other local payment systems
    • Refactored legacy integrations in a large monolithic application for stability, speed, and maintainability
    • Implemented a financial analytics system for the finance department to review financial data online, with export to Excel spreadsheets and other formats
    • Migrated the monolith to Docker, containerizing the application and its infrastructure
  7. · Kyiv

    Paleman

    Backend Engineer

    • Engineered the PHP/MySQL web backend for a SA-MP roleplay community running 15 game servers and ~12,000 concurrent players, covering player accounts, an in-game shop, and administration
    • Integrated PayPal payments into the in-game shop, delivering purchases to players on the game servers through a shared database and an internal API
    • Built admin tools for staff to manage accounts and issue bans, with full ban and action logs for moderation and auditing
    • Designed and tuned MySQL queries and schema for a database shared by the web backend and all game servers, keeping performance stable under peak concurrent load
  8. · Kyiv

    Perlyna Beauty

    Backend Engineer

    • Built an in-house CRM from scratch on PHP/Symfony, unifying client records, service history, and staff schedules across 2 salons and 20+ employees
    • Engineered an automated online booking engine with real-time availability and double-booking prevention, taking bookings from the website, a Telegram bot, and the staff admin interface, roughly 1,000+ appointments a month
    • Automated appointment confirmations and reminders via SMS, replacing phone calls and a paper notebook and saving an estimated 30+ hours of scheduling work a month
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