Development services · Warsaw, Poland

Backend developer in Warsaw

Server-side logic, databases, authentication and APIs - I build backends that are secure, documented and ready for production traffic from day one.

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Backend developer Warsaw Laravel Node PHP

Backend development scope

✓REST and GraphQL API design and implementation
✓Laravel, Symfony, Node.js and Django applications
✓PostgreSQL, MySQL and MongoDB schema design
✓JWT/session auth, OAuth and role-based access control
✓Payment gateways: Stripe, PayU, Przelewy24
✓Queue workers, cron jobs, webhooks and email queues
✓Admin panels and internal tooling

Backend engineering approach

I write migrations, seeders and API docs so the next developer is not lost.

Business rules live in the service layer - not scattered in controllers or Blade templates.

SQL queries are indexed and explained; N+1 problems are fixed before launch.

Polish e-commerce backends handle VAT, invoices and local payment callbacks correctly.

US SaaS backends support subscriptions, webhooks and idempotent payment handling.

Backend stack

PHP 8+LaravelSymfonyNode.jsPythonDjangoPostgreSQLMySQLMongoDBRedisDocker

Warsaw · Poland · Europe · USA

Remote-first development with local presence in Warsaw - the same senior engineer for Polish, European and American clients.

Warsaw

Backend developer Warsaw - custom APIs for local startups replacing WordPress plugins and spreadsheets.

Poland

Laravel and PHP backends for Polish agencies and merchants with PayU and InPost integrations.

Europe

GDPR-compliant logging, EU hosting and cross-border B2B data flows.

USA

Node and Laravel APIs with Stripe billing and US timezone maintenance windows.

Development + SEO

We do not only build - we promote

Clean URLs, fast TTFB and indexable API-driven pages matter for rankings - I pair backend work with SEO so your product is found, not only functional.

Website promotion & SEO

About me

I'm Viktar Liukevich

Full-stack developer · 15+ years creating web

I am Viktar Liukevich, a backend developer in Warsaw. APIs, databases and payment flows are where I spend most of my week - Laravel, Symfony, Node and Python, always with migrations, validation and audit trails.

Backend is where money and data live. I have built hundreds of integrations for Polish merchants and US SaaS teams - the hard part is rarely CRUD; it is idempotent webhooks, indexed queries and documentation the next developer can follow.

For heavy Python/ML pipelines, .NET enterprise modules or dedicated DBA work on PostgreSQL at scale, I work with specialist partners across Poland, the EU and the US whom I have vetted for years. I own architecture and code review; they deliver in their stack under NDA.

300+

Completed Projects

90+

Clients

10+

Partners

Advantages

15+ years working for myself
Wide technology stack
Rapid development
Warranty and support
Global quality standards
Working with clients worldwide
Innovative technological solutions

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