Luka Radonjic
@lukaradonjic
Senior full-stack engineer specializing in React Native, TypeScript, and production-grade cloud infrastructure.
MontenegroWhat I'm looking for
I’m a Senior Software Engineer specializing in React Native, TypeScript, and production-grade cloud infrastructure. At EPAM Systems, I’ve owned complex mobile systems end-to-end—from architecture decisions and performance work to cloud deployment and mobile release—delivering an offline-first React Native app with GB-scale datasets and cutting sync time by over 50%.
I also drive high-impact modernization, including a brownfield migration from legacy JavaScript to React Native and TypeScript, and performance-critical improvements like an AWS Lambda pipeline that reduced mobile startup time from seconds to near-instant. Across my roles, I’ve partnered closely with product and business requirements, mentored engineers, and supported teams through 15–20 technical interviews, while maintaining a pragmatic focus on reliability, observability, and delivery speed.
Experience
Work history, roles, and key accomplishments
Built an offline-first React Native app for GB-scale datasets, diagnosing a RealmDB import bottleneck and reducing sync time by 50%+. Designed an AWS Lambda pipeline to generate data server-side, cutting large-payload startup time from seconds to near-instant. Led brownfield migration to React Native and TypeScript for a 7-figure user base and owned onboarding, testing, and Expo EAS release pipeli
Software Developer
Bild Studio Doo
Mar 2019 - Aug 2022 (3 years 5 months)
Owned Azure deployment infrastructure across projects, including Azure DevOps CI/CD, Azure Container Registry builds, and Azure App Services deployments. Built and maintained React and React Native applications, and delivered Node.js/Express backend services with backward-compatible API versioning.
Software Developer
1Visol Doo
Jan 2018 - Mar 2019 (1 year 2 months)
Built custom Jira-based operational workflow platforms using ScriptRunner and plugins for logistics and driving-school use cases. Developed an Android (Java) app to track lessons and GPS routes with map visualization integration, and supported CI/CD and production/test environments.
Fintech Infrastructure Migration
Freelance
Migrated a fintech infrastructure from a fragile single-node setup to a resilient AWS architecture. Designed and implemented ECS with Fargate, ALB, Amazon MQ, Redis, CloudWatch/CloudTrail observability and audit logging, and S3 for static asset delivery.
Education
Degrees, certifications, and relevant coursework
University of Electrical Engineering, Podgorica
Coursework completed, Electrical Engineering / Computer Science
2004 - 2008
Completed coursework in Electrical Engineering / Computer Science at the University of Electrical Engineering in Podgorica from 2004 to 2008.
Tech stack
Software and tools used professionally
Availability
Location
MontenegroAuthorized to work in
Job categories
Skills
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