Callahan User
@callahanuser
I build scalable enterprise web applications with React, Java, Spring Boot, and PostgreSQL.
Bosnia and HerzegovinaWhat I'm looking for
I've built large-scale healthcare systems and enterprise applications at Kodecta using React, Java Spring Boot, PostgreSQL, MongoDB, and the MEAN stack.
I lead backend optimization efforts around resource management and scaling to improve system efficiency for enterprise clients. I've also delivered large-scale data migrations and contributed to design, architecture, and implementation decisions with cross-functional teams.
I enjoy mentoring developers: two junior developers I mentored reached medior level within a year, and I led an internship program that transitioned 10 participants into full-time employees.
Earlier, I completed a full-stack internship at Mistral Technologies using MongoDB, Node.js, Express, React, and React Native, and supported internal applications, Windows servers, and network administration at Konica Minolta.
Experience
Work history, roles, and key accomplishments
Full Stack Web Developer
Kodecta d.o.o
Jan 2019 - Present (7 years 8 months)
Developed large-scale health care systems and enterprise applications using the MEAN stack, Java Spring Boot, and PostgreSQL. Led backend optimization, mentored junior developers, and conducted data migrations.
Education
Degrees, certifications, and relevant coursework
Gigi school
Internship, Computer Science
2018 - 2019
Completed a full-stack internship project using MongoDB, Node.js, Express, React, and React Native.
Tech stack
Software and tools used professionally
Availability
Location
Bosnia and HerzegovinaAuthorized to work in
Job categories
Interested in hiring Callahan?
You can contact Callahan and 90k+ other talented remote workers on Himalayas.
Message CallahanGet matched with your dream remote job
Sign up now and join over 250,000+ remote workers who receive personalized job alerts, curated job matches, and more for free!
