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Lilic195/README.md

Aleksa Lilić

Senior Software Engineer & Product Engineer

I’m a software engineer based in Belgrade, Serbia, building software professionally since July 2017.

My work spans product development, backend systems, data pipelines, integrations, and cloud infrastructure-from understanding customer problems to implementation, rollout, and verification.

Experience

At ClickGUARD, I work primarily with Node.js and TypeScript across backend services, asynchronous processing, analytics, billing, integrations, and cloud infrastructure. My role combines software engineering with product engineering: investigating customer needs, evaluating trade-offs, and delivering practical solutions.

Previously, I built backend applications with Java and Spring Boot.

Selected work

  • Traffic classification and tracking: Implementing classification and evidence processing across tracking workers, MongoDB, and BigQuery, with controlled rollouts and compatibility with existing behavior.
  • Data reliability: Building analytics pipelines, reconciliation processes, and recoverable historical backfills with staged publication, backups, and consistency checks.
  • Billing and integrations: Developing payment and subscription workflows, CRM synchronization, and integrations with advertising platforms.
  • Cloud efficiency: Optimizing BigQuery queries, reviewing infrastructure usage, and improving visibility into operating costs.
  • Production reliability: Investigating concurrency issues, partial failures, and data inconsistencies, supported by regression tests and deployment verification.

Technologies

Area Technologies
Current primary stack Node.js, TypeScript
Earlier backend experience Java, Spring Boot
Data MongoDB, Redis, BigQuery, SQL
Cloud and infrastructure Google Cloud, Kubernetes, Docker
Frontend React, TypeScript
Integrations Stripe, HubSpot, Google Ads, Microsoft Advertising, Meta

Education

Bachelor’s degree (Applied Studies), Electrical and Computer Engineering
Study programme: New Computer Technologies

School of Electrical and Computer Engineering of Applied Studies (VIŠER), Belgrade, Serbia

Connect

LinkedIn

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