Independent web developer · Belgrade
I build and extend systems in PHP and Python: WordPress/WooCommerce, OpenCart, Laravel, APIs, CRM/ERP platforms, payment services and administrative interfaces. I step into complex live projects and develop their backend.
Core stack: PHP, Python, JavaScript/TypeScript, MySQL, PostgreSQL, Redis, REST APIs, CRM/ERP and 1C integrations. I handle projects from architecture and data analysis through production launch and ongoing support.
For an initial assessment, send a project link and a short description of the current and expected behavior.
I focus on complex work that cannot be solved by installing an off-the-shelf plugin. It requires understanding the existing code, data, external services and the project’s business logic.
Codebase analysis, bug fixing, business logic development, legacy system upgrades, data migration and service recovery.
WordPress, WooCommerce, OpenCart and ocStore: custom plugins and modules, checkout and order flows, admin areas, catalogs, imports, exports and integrations.
Integrations with payment providers, messaging platforms, Google Sheets, CRM/ERP systems and other APIs. Data synchronisation, state control, idempotency and exchange logging.
PHP/Python, MySQL/PostgreSQL, REST APIs, data processing, customer portals, admin panels and purpose-built web interfaces for internal operations.
Messaging applications, website data exchange, request and payment handling, administrative management and external API integrations.
Linux, Nginx/Apache/Caddy, PHP-FPM, Docker, TLS/DNS, email delivery, performance and production incident diagnostics.
Projects involving integrations, non-standard business logic and the continued development of existing systems.
Bidirectional exchange of categories, products, prices, warehouses, customers and orders with GUID-based mapping.
View project detailsCatalog and orders, variant-level inventory, bundles, OCFilter, recoverable carts and production caching.
View project detailsMulti-account statistics, token refresh, retryable historical imports and client reporting.
View project detailsCamera or screen publishing, scoped OpenVidu tokens, broadcast statuses and viewer access based on active plans.
View project detailsPartners and networks, service workflows, Telegram and MAX, signed callbacks and application of responses to YCLIENTS bookings.
View project detailsContact and signal collection, explainable scoring and preparation of a prioritised company list for outbound work.
View project detailsThe stack is selected around the project architecture, data model and integration landscape.
PHP, Python, JavaScript/TypeScript, SQL, MySQL, PostgreSQL, Redis, Laravel, Symfony, Yii, FastAPI, REST APIs and OAuth 2.0.
WordPress, WooCommerce, OpenCart, ocStore and Joomla: custom plugins and modules, checkout flows, catalogs, orders and administrative tooling.
CRM, ERP and 1C integrations, YCLIENTS, payment gateways, Telegram and other messaging platforms, Google Sheets, external catalogs and bidirectional data exchange.
Linux, Nginx, Apache, Caddy, PHP-FPM, Docker, TLS/DNS, deployment, migrations, performance and production diagnostics.
When a project falls outside this list, I first review its requirements, constraints and current architecture. That assessment determines the appropriate stack, scope and implementation risks.
I review the project link, the current behavior and the expected result. I then determine whether there is enough information for an estimate and which parts of the system need inspection.
I examine the existing code, dependencies, data, integrations and runtime environment, then document the constraints, risks and open questions that affect delivery.
We agree on the outcome, scope boundaries, price, timeframe or milestones, and acceptance criteria. Access credentials are requested only after this stage.
I build the agreed solution and demonstrate it in the selected environment. If a previously unknown constraint emerges, I first explain its impact on the project.
I verify the agreed scenarios, deliver the changes and provide the instructions needed for launch, operation or continued maintenance.
The figures below come from my public Freelance.ru and FL.ru profiles.
The client highlighted the module’s versatility, the reliable Telegram integration, the quality of the payment integrations and close attention to technical detail.
Review dated 20 Sep 2025 · Freelance.ruThe review notes the quality of the integration, consistent communication throughout the project and satisfaction with the delivered result.
Review dated 2 Oct 2025 · Freelance.ruThe client confirmed successful delivery of the project spanning messaging platforms, an external API and an administrative interface.
Review dated 17 Mar 2026 · Freelance.ruThe client praised the proposed configuration options, the quality of the work and the willingness to engage again on future projects.
Review dated 9 Apr 2024 · FL.ruThe review highlights a technically sound solution, prompt delivery and additional work beyond the original brief.
Review dated 22 Aug 2023 · FL.ruAfter the supplier moved from API v2 to API v3, product imports and routine catalog updates were restored.
Review dated 21 Sep 2017 · FL.ruIndependent specialist
I am Dmitry Nedeljkovic, an independent web developer based in Belgrade. My primary focus is backend development, integrations and the continued development of live web systems.
I lead the technical work directly: I analyse requirements, define the implementation, build the solution and verify the result. I work with PHP, Python, JavaScript/TypeScript, MySQL, PostgreSQL and Redis, as well as Laravel, Symfony, Yii, WordPress/WooCommerce and OpenCart.
I design REST APIs, customer portals, CRM/ERP systems and 1C integrations, and connect payment services and external platforms. My work ranges from focused enhancements to complex systems that require a thorough understanding of the codebase, data model and production environment.
Direct collaboration
You work with me directly, without account managers or intermediaries. We can start with a single task, a technical assessment or a clearly defined phase of a larger project.
Available options include a bank transfer to a Serbian account or Visa card, PayPal, a RUB transfer through YooMoney or a Mir card and cryptocurrency. The payment method and project milestones are agreed before work begins.
No passwords or access credentials are needed for an initial assessment. Send a project link, briefly describe the current and expected behavior, and include a timeframe or budget if already defined.
