Антон

Anton Kutakov
Senior Backend Developer - PHP / Laravel Engineer
Mykolaiv, Ukraine - Open to remote
Email: [відкрити контакти](див. вище в блоці «контактна інформація»)
Phone: [відкрити контакти](див. вище в блоці «контактна інформація»)
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Telegram: https://t.me/ant0n2222

PROFESSIONAL SUMMARY
Backend developer with 8 years of commercial experience designing and building REST APIs and microservices in
PHP 8 and Laravel with PostgreSQL. Delivers service- and repository-layered architectures for both monolithic and
microservice systems, applying OOP, SOLID, DRY and KISS. Strong in database schema design and query
optimization, Redis caching, message queues, and concurrency-safe, high-load workloads. Integrates third-party
services end to end (Stripe, PIM / Akeneo, DeepL, Matomo, BankID, Twilio) and owns features from architecture
through tests, CI/CD, deployment and production monitoring. Hands-on with LLM / OpenAI API integration,
retrieval-augmented generation and AI coding agents. English B2 (Upper-Intermediate).

TECHNICAL SKILLS
- Languages: PHP 8 (PHP 7 legacy), SQL, Python (parsers, TensorFlow), JavaScript, Bash
- Frameworks: Laravel 7-12, Laravel Backpack, Filament 3 / 4, Symfony components (HTTP Client, Mailer,
Console), WordPress
- API & Architecture: REST API design, OpenAPI / Swagger, microservices, monolith, service layer, repository
pattern, event-driven design, OOP, SOLID, DRY, KISS, design patterns, domain services
- Databases: PostgreSQL, MySQL, MongoDB, Redis; schema design, query optimization, indexing (covering /
composite / GIN), N+1 elimination, PgBouncer, pgvector
- Queues & Messaging: RabbitMQ, Redis queues, Laravel Horizon, job batching and chaining, scheduled workers,
distributed locks
- DevOps & Cloud: Docker, Docker Compose, GitLab CI/CD, GitHub Actions, Nginx, AWS (S3), DigitalOcean
(Spaces, App Platform, Managed PostgreSQL), Kubernetes, Laravel Forge / Sail
- Testing & Quality: PHPUnit, Pest, feature and integration tests, PHPStan / Larastan, Laravel Pint, code review
- Monitoring & Observability: Sentry, Rollbar, Graylog / GELF, Zabbix, Laravel Telescope, Matomo analytics
- Integrations: Stripe (Cashier, subscriptions, webhooks), LiqPay, Twilio, Mailchimp, DeepL, Akeneo and other PIM
systems, eSputnik, BankID / GrandID, Nova Poshta, Privat24
- AI / LLM: OpenAI API (openai-php), function / tool calling, RAG, embeddings, vector search (pgvector, HNSW), AI
coding agents (Claude Code); author of an internal agentic dependency-upgrade workflow
- Practices: Agile / Scrum, Git / GitLab flow, API documentation, profiling and performance tuning, security
hardening (SSRF guards, HMAC request signing), technical-debt reduction

PROFESSIONAL EXPERIENCE

Backend Developer - Tallium Inc.
Kyiv, Ukraine (Remote) | October 2021 - Present
Deliver and maintain backends for multiple product teams. Design microservices, data pipelines and third-party
integrations on Laravel, PostgreSQL and Redis, deployed with Docker and GitLab CI/CD to DigitalOcean and
Kubernetes.
Kolla - Digital Product Passport (DPP) SaaS for EU compliance (kolla.eu)
- Re-architected a legacy Laravel 7 monolith into a Laravel 12 REST API with a service / repository layer and
versioned OpenAPI documentation.
- Designed and built microservices for video transcoding (FFmpeg, TUS resumable uploads), dynamic QR codes,
and PIM integration that parses external catalogs (Akeneo, Plytix, Magento, Struct, Bluestone) and generates
branded microsites from their data.
- Implemented Stripe subscription billing with Laravel Cashier, plan entitlements and webhook handling.
- Built custom-domain onboarding with DNS TXT verification and per-domain QR / asset generation; integrated the
Matomo analytics server and DeepL machine translation.
- Optimized PostgreSQL for large-catalog DPP generation; diagnosed and fixed a PgBouncer transaction-abort
(SQLSTATE 25P02) across the deploy and runtime paths.
- Added an internal REST 'data source' type and a re-importable CSV data source with asynchronous, transactional

apply and row-level classification.
- Built an OpenAI-powered retrieval-augmented chat: content chunking, text-embedding-3-small embeddings stored
in a pgvector column with an HNSW cosine index, nearest-neighbour retrieval and an empty-context fallback to
prevent hallucination.
- Hardened outbound integrations with SSRF guards and HMAC-signed asset links.
Prostor - retail loyalty platform for a national cosmetics and homeware retailer (prostor.ua)
- Designed a new REST API backend for the mobile app: virtual currency ('Beauty Coins'), bonus system, push
notifications, habit tracker, scratch cards and gamification ('Wheel of Fortune', '3-in-a-row').
- Built concurrency-safe reward granting with Redis distributed locks plus database transactions and row locking;
verified to hold under 50+ simultaneous client retries with no duplicate payouts.
- Cut Filament admin-panel list latency with covering and composite indexes aligned to pagination sort order;
removed redundant queries and added precomputed hourly statistic caches.
- Integrated the Prostor loyalty API and the eSputnik push / email platform; shipped structured logging to Graylog
over GELF; added HMAC request signing and replay-attack protection on sensitive endpoints.
Mangold - Swedish investment and brokerage platform
- Built portfolio-valuation logic with instrument-level caching, MiFID and fund-permission rules, and locale-aware
country data using ICU collation.
- Integrated Millistream market-data pricing, GrandID / BankID authentication, KYC reporting, and the SPAR
population-register importer; added timing instrumentation and tuned import performance.
- Delivered app-targeted 'banner messages' with platform and version filtering driven by the X-Client-Version header.
Other Tallium projects
- FanLeague (integrated betting system) - new Laravel Backpack admin features, MongoDB, legacy-code support.
- Nona (health-tracking mobile app) - backend on Laravel 7 with queues and PostgreSQL, plus a management
admin panel.
- LiveInCareCompany (UK caregiver-hiring platform) - new features, Stripe support and technical-debt reduction on
an inherited codebase.
Backend Developer - DevHired Inc.
Mykolaiv, Ukraine | March 2020 - October 2021
- Developed and supported features for the Quicksilk CMS and the Beautyalist marketplace.
- Built data parsers and a Facebook API integration; delivered small commercial projects in Python and TensorFlow.
Web Developer (WordPress) - Extrawest
Mykolaiv, Ukraine | July 2019 - March 2020
- Delivered new WordPress projects and maintained existing ones.
- Developed WordPress plugins integrating Nova Poshta shipping and Privat24 payments.
Web Developer (WordPress) - TemplateMonster
Mykolaiv, Ukraine | July 2018 - June 2019
- Built and customized WordPress themes and templates.

EDUCATION
- Master's degree, Software Engineering - Mykolaiv Shipbuilding University | 2022 - 2023
- Bachelor's degree, Software Engineering - Mykolaiv Shipbuilding University | 2019 - 2022
- Junior Specialist, Software Engineering - Mykolaiv Shipbuilding College | 2015 - 2019

CERTIFICATIONS
- EF SET English Certificate - https://cert.efset.org/9fgpQx

LANGUAGES
- English - B2 (Upper-Intermediate); EF SET certified
- Ukrainian - Native