Lazar O.

About Me

Lazar is a Senior iOS Developer ready to innovate and lead, and impact the quality and speed of development tasks - creating, developing and deploying solutions from early prototypes to full-blown production services and experiences; by acting as an iOS champion throughout the SDLC, leveraging best practices along with iOS build and test tools for a robust process that vastly reduces lead time to push code to production.

AI, ML & LLM

Frontend

Backend

Database

Other

Work history

UpStack
UpStack
Senior iOS Engineer
2020 - Present (5 years)
Remote
  • Creating and developing innovative software solutions for clients across a broad range of industries.

  • Participate in scrums consisting of cross-functional teams, both software and hardware.

  • Ensure that features are being delivered efficiently and on-time.

IONOS
IONOS
iOS Expert
2015 - 2020 (5 years)
Munich, Germany
  • Worked on the delivery of solutions for various email and cloud-storage clients: ​GMX​, ​WEB.DE​, ​mail.com​,​1&1 and deployed an instant messenger solution.

  • Produced well-organized and optimized solutions for client-server communication issues in weak networking conditions.

  • Designed core-data models and stacks on solutions; implementing new features, fixing bugs, refactoring legacy code components, and focusing on reusable, modular and testable code.

TES Electronic Solutions GmbH
TES Electronic Solutions GmbH
Embedded Software Developer
2011 - 2015 (4 years)
Frankfurt, Germany
  • Developed and implemented system, UI and backend solutions for Vorwerk's ​Thermomix kitchen device; introducing data layer in GUILiani, data caching and asynchronous loading to speed up load time by a factor of ten.

  • Managed processes for data cleaning and database normalisation using the right tools to minimize redundancy and data size by a factor of ten on the project.

  • Handled the porting of an in-house UI framework called GUILiani to iOS and a Renesas SH7264 microcontroller.

Freelance
Freelance
Lead Software Developer
2007 - 2011 (4 years)
Serbia
  • Led and managed sizable projects for clients; co-authoring several commercially available products including Windows apps for vector and image processing and iOS apps for audio/video processing.

  • Offered expertise for the implementation of multithreaded data mining solutions; processing and aggregating different web services using C#, MySQL, XML/XPath, HTML.

  • Recognized as “the go-to person” for junior developers on projects; providing thought leadership and guidance on projects and technical expertise across multiple disciplines.

Center for Biomedical Research, University of Kragujevac
Center for Biomedical Research, University of Kragujevac
Researcher / Software Developer
2003 - 2007 (4 years)
Krugujevac, Serbia
  • Acted as a subject matter expert and main developer for computer graphics, 2D/3D algorithms, modelling and visualisation; working on BioIRC's groundwater flow 3D modelling and simulation system.

  • Engineered solutions for model meshing of computational fluid dynamics, motion tracking, and image processing; participating in parallel programming for the delivery of solutions.

  • Actively participated in and contributed to research projects and conferences; working for 3 months with a research team from the University of Braunschweig, Germany.

Nemosoft DOO
Nemosoft DOO
Game Developer
2002 - 2002
Belgrade, Serbia
  • Developed and executed solutions for the Taxi 3 game; handling shadows and lightning tools, the dynamic shadow algorithm and sound engine on the game.

  • Debugged and optimized the 3D OpenGL game's engine using lighting/shading tools; identifying where new technologies and techniques can be applied.

  • Delivered practical solutions to complex problems on the game by incorporating feedback from end users in solutions.

Showcase

iOS Expert - GMX Mail App
iOS Expert - GMX Mail App
  • Develops a mobile app for iOS, enabling users to check emails on the go.

  • Features a Mail Collector to consolidate emails from multiple accounts.

  • Implements push notifications for timely email delivery.

Embedded Software Developer - thermomix
Embedded Software Developer - thermomix
  • Thermomix ® is a company known for innovation and introducing new technologies.

  • The company developed a bespoke solution for the Thermomix kitchen device, including UI and backend updates.

  • The project involved the full software lifecycle, from design to delivery.

Co-Founder / CTO - Threads + Bits
Co-Founder / CTO - Threads + Bits
  • Co-founder of Threads+Bits with a remote team.

  • Developing a novel iOS chat app focused on conversations rather than messages.

  • Managing project goals, driving initiatives, and implementing the firm's technology strategy as CTO.

Senior iOS Developer - Red Hot Bits
Senior iOS Developer - Red Hot Bits
  • Developed a bundle of apps focused on providing users with market updates.

  • Led a team of two developers in implementing solutions for the Azure Cloud Platform backend using C# and Node.js.

  • Automated Fastlane for multi-target app releases, including Watch App, Notification extensions, and Widgets.

Co-Founder - LogoMaker
Co-Founder - LogoMaker
  • LogoMaker is a software product designed for creating professional business logos, advertisements, and website graphics.

  • It offers over 3,300 customizable logo templates and over 10,000 categorized objects.

  • The software has a long history, with previous versions released between 2007-2011 and continued availability on Amazon.de.

Education

Education
MSc. Computer Science
School of Electrical Engineering, Belgrade, Serbia
1996 - 2003 (7 years)