Stevan Kosijer Email & Phone Number

Serbia

Novi Sad, Vojvodina, Rs

Remote, Anywhere, Us

Currently:- Building the liblab AI Framework- Leveraging AI models and integrations with external services to execute any workflow- Check the demo: https://youtu.be/thYuksfzO-k?si=wuLoQWCtZtImU2yqPreviously:- Building the core SDK generator supporting Java, Python, Typescript, C#, Go and Terraform providers.- Generating full blown, documented and publishable SDKs from any OpenAPI spec in seconds.- Building the surrounding services to provide seamless customer experience.- Collaborating cross-functionally with multiple teams.- Doing system design interviews.

San Francisco, Ca, Us

Latest project:- Leading a remote team of 9 people, working on real-time sales analysis software for a multinational clothing company- Implemented a group of features and optimizations for Black Friday global real-time sales analysis- The user base increased by 22% with more than 1.5m daily successful requests and 13 errors in total during the Black Friday eventTechnology stack: Java, Spring, GraphQL, Redis, SnowflakePrevious project:- Worked as a team lead on a data-intensive serverless engine for processing and storing 15 terabytes of Amazon data every day- Created an automated system for authorization with OAuth2 Authorization Code Flow- Designed the ETL engine architecture, created C4 diagrams, and developed the end-to-end serverless cloud solution using AWS CDK and Java- Optimized data merge to Snowflake from 900s to 8s for ~180MB files by using the S3 stage with Snowflake JSON parsing feature- Improved the infrastructure to handle specific rate limits set by Amazon- Enabled the team to overcome technical challenges and provide maximum output- Guided, mentored, and motivated the team with a sharp focus on delivery and quality- Held bi-weekly demos and presentationsTechnology stack: AWS Cloud, CDK, Java, Spring, Snowflake

San Francisco, Ca, Us

Partnering with one of the 3 largest technology companies in Silicon Valley to provide value for their business.Doing technical interviews and mentoring new employees.Technical specs of my current project:- microservice architecture - async communication- built with Spring (BE) & React (FE)- AWS EC2, AWS Lambdas- Terraform- Docker

Amsterdam, Nh, Nl

Worked for the largest energy company in the Netherlands, Essent N.V. as part of the Mechanix team.We were focused on finding and implementing cutting-edge technical solutions and optimizations for the platforms Essent is using in its everyday internal and external business processes. We were on a technical roadmap of migrating old monolith application to microservices (55+ svcs) while still adding new features and bringing business value.Part of technologies and practices used: - AWS Cloud, Hiera, Puppet, Jenkins- Docker, Kubernetes- Microservice architecture (over 45 svcs)- Java 11, SpringBoot, Hibernate- Hazelcast- ELK stack, Grafana, Zipkin, SpringBoot Admin- Oracle RDMS, Liquibase- Angular 7

Contributed to development and organization of several projects, some of which are explained with more detail in the Accomplishments/Projects section at the bottom of this LinkedIn profile.

X-Land is a private company based in Novi Sad, primarily dealing with education and software development. I worked on several projects and held group lectures in fields of programming and software engineering.Programming languages: - C, C++, Java, Assembly, Angular 2.

Novi Sad, Vojvodina, Rs

Assisting the TA in facilitating computer laboratory exercises and supporting students to efficiently and successfully learn and overcome problems during practical classes. The course of Computer Architecture.

Amsterdam, Nh, Nl

Worked on the development of a desktop application for a technical university. With its core functionality tied to the management of subjects, schedules, student grades and progress.- Collecting user stories and forming requirements- Database design and management- UI design and implementation- Implementation of application core functionalitiesTechnologies and languages: - C#- WPF

Master'S Degree, E-Business And Payment Systems

Bachelor'S Degree, Electrical Engineering And Computer Science