Danijel Bjelajac
Senior Software Engineer at LearnUpon
Zrenjanin, Vojvodina, Serbia
Summary
👤
Senior🎓
Top SchoolDanijel Bjelajac is a product-minded Senior Software Engineer with over 20 years of software experience and 11 years in professional roles, currently strengthening backend systems at LearnUpon. He specializes in Ruby on Rails and full-stack work, has led architectural efforts (DDD, event sourcing, GraphQL) for logistics and healthcare platforms, and implemented data pipelines with Apache Beam and BigQuery to support clinical integrations. Danijel has repeatedly improved performance and revenue through pragmatic rework of e-commerce sections and shipping-critical systems, and he mentors juniors while owning design and code quality in remote teams. Based in Zrenjanin, Serbia, he blends deep backend engineering with hands-on integrations (AWS, Stripe/PayPal, Booking engines) and a long track record of shipping reliable, secure systems for both startups and enterprise customers.
11 years of coding experience
21 years of employment as a software developer
BSc Computer science, BSc Computer science at Univerzitet u Novom Sadu
English, Serbian, Croatian
Stackoverflow
106reputation
59kreached
5answers
0questions
Github Skills (90)
heroku-deployment10
redux-store10
javascript-api10
rendering9
javascript9
sidekiq9
react-rails9
server-side9
webhooks9
react-native9
ios9
redux9
expo9
react9
frontend9
Programming languages (4)
Github contributions (5)
danijel/fp_components
Sep 2020 - Sep 2020
Contributions:9 pushes, 4 branches in 1 day
danijel/stripe-test
Feb 2019 - Apr 2019
Contributions:3 pushes, 1 branch in 1 month
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