Slaven Ostojić

Software engineer with more than 10 years of professional experience in designing and developing enterprise software solutions in fintech, telco and health industries. Passionate about software design and architecture, enjoy writing clean and well-tested code. Active in local community, equipped with strong communication and leadership skills. In love with my guitars, vinyl records, nature, snowboarding and chess.

Experience

ZIRA, Tuzla» System Architect

May 2023 - Present » 2y

  • Architecting microservice-based enterprise solutions for a leading telecom in Saudi Arabia.
  • Developed electronic invoicing product integrated with ZATCA; optimized validation speed by 100x.
  • Led the team in delivering a marketplace solution integrating suppliers and customers via TMF API.
  • Built CI/CD pipelines using GitLab CI/CD.
Java/Spring Boot
Python

Salt Square, Tuzla» Senior Software Engineer

March 2022 - May 2023 » 1y 3m

  • Led full-stack development of consumer portal for a major appliance company deployed on AWS.
  • Designed and implemented a feature flag service for a HIPAA-compliant healthcare solution.
  • Built inventory management systems with Google SSO.
  • Mentored junior engineers on unit testing and Spring Boot.
Java/Spring Boot
Python/FastAPI
Node.js/Next.js
React/Redux

Infobip, Tuzla» Software Engineer

April 2019 - February 2022 » 2y 11m

  • Developed scalable, distributed enterprise microservices for data-intensive applications.
  • Maintained the USSD platform with 3 million concurrent sessions in Africa.
  • Redesigned the Email platform to scale for 10x more traffic.
  • Led an internship program and mentored junior engineers.
Java/Spring Boot
Python/Flask
Node.js/Express.js
Angular

Marvelsoft, Tuzla» Senior Software Developer

September 2014 - March 2019 » 4y 7m

  • Developed high-performance algo trading systems and order management platforms.
  • Improved legacy projects to enhance modularity and integration with third-party systems.
  • Led projects and mentored developers.
C++
Python
TypeScript
Education

Faculty of electrical engineering, Tuzla» Bachelor’s degree - Computer Science

September 2010 - September 2014 » 4y 1m

    Generated: 2025-04-03