Stevan Kosijer

Stevan Kosijer Email and Phone Number

Senior Software Engineer @ Postman
Serbia
Stevan Kosijer's Location
Serbia, Serbia
About Stevan Kosijer

Throughout my career, I mostly worked as a full-stack engineer, but I feel I provide the most value working on backend web development, architecture and infrastructure, databases, cloud, and serverless systems. I worked with large enterprise software solutions that often had high infrastructure and business domain complexity. I gained experience in setting up microservice architecture main components such as discovery and registry service, gateway service for authorized routing and load balancing, configuration service for externalized git configurations, broker service for async communication, and authorization service for SSO authorization and authentication flows. I also have experience designing and implementing bespoke data-intensive serverless solutions for processing petabytes of data. I have a strong understanding of Agile software methodologies like Scrum and Kanban, and a high level of knowledge in development processes, deployment procedures, and development environment setups. Thriving in unfamiliar situations and using opportunities to learn and gain exposure to new ideas and experiences is something I look forward to. I always tend to stay curious and informed in today's fast pace world. Therefore, a major part of my everyday time is dedicated to research and learning. I love hearing other people's opinions and discussing ideas. Character, common sense, creativity, and consideration make a productive work environment. Being open, honest, and investing in relationships makes a big difference.I have a huge passion for my work and try to lead by example.- Most recently -Currently I'm enthusiastic about startups, where I excel in crafting innovative products and solutions tailored to meet customer demands. The dynamic interplay of developing products and working closely with customers fuels my drive to bring impactful ideas to life in the entrepreneurial world.- Interests -Databases: Postgres, MySQL, Oracle, MongoDB, DynamoDB, SnowflakeLanguages: Java, JavaScript, TypeScript, SQL, PL/SQLFrameworks of choice: Spring for Java, Node/Nestjs for TS, CDK/Terraform for AWS, ReactEngines and software: Elasticsearch, Docker, Kubernetes, Hazelcast, Liquibase, JenkinsOther: Serverless, Cloud, Domain Driven Development, Database Design, Scrum, CI/CD Thanks for reading, reach me on Linkedin or by email stkosijer@gmail.com

Stevan Kosijer's Current Company Details
Postman

Postman

View
Senior Software Engineer
Serbia
Website:
postman.com
Employees:
3100
Stevan Kosijer Work Experience Details
  • Postman
    Senior Software Engineer
    Postman
    Serbia
  • Aspect
    Co-Founder
    Aspect Jun 2023 - Present
    Novi Sad, Vojvodina, Rs
  • Liblab
    Senior Software Engineer
    Liblab Jan 2023 - Present
    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.
  • Symphony.Is
    Technical Team Lead
    Symphony.Is Jan 2022 - Jan 2023
    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
  • Symphony.Is
    Software Engineer
    Symphony.Is Mar 2020 - Jan 2022
    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
  • Levi9 Technology Services
    Software Engineer
    Levi9 Technology Services Mar 2018 - Mar 2020
    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
  • Independent Consultant
    Software Engineer
    Independent Consultant Jan 2017 - Dec 2019
    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
    Software Engineer
    X-Land Aug 2016 - Jan 2018
    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.
  • Faculty Of Technical Sciences, University Of Novi Sad
    Student Teaching Assistant
    Faculty Of Technical Sciences, University Of Novi Sad Jan 2016 - Jun 2016
    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.
  • Levi9 Technology Services
    Internship
    Levi9 Technology Services May 2015 - Jul 2015
    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

Stevan Kosijer Skills

Git Amazon Web Services Public Speaking Maven Continuous Integration And Continuous Delivery C Mongodb Kibana Object Oriented Programming Jenkins Angular Representational State Transfer Agile Methodologies Front End Engineering Back End Web Development Soap Scrum Service Oriented Architecture Nosql Html Angularjs Java Xml Docker Hibernate Pl/sql Typescript Kubernetes Continuous Integration Full Stack Development Javascript C++ Microservices Spring Framework Sql Software Development Elasticsearch Unified Modeling Language Cloud Computing C# Logstash Databases

Stevan Kosijer Education Details

  • Faculty Of Technical Sciences, University Of Novi Sad
    Faculty Of Technical Sciences, University Of Novi Sad
    E-Business And Payment Systems
  • Faculty Of Technical Sciences, University Of Novi Sad
    Faculty Of Technical Sciences, University Of Novi Sad
    Electrical Engineering And Computer Science

Frequently Asked Questions about Stevan Kosijer

What company does Stevan Kosijer work for?

Stevan Kosijer works for Postman

What is Stevan Kosijer's role at the current company?

Stevan Kosijer's current role is Senior Software Engineer.

What schools did Stevan Kosijer attend?

Stevan Kosijer attended Faculty Of Technical Sciences, University Of Novi Sad, Faculty Of Technical Sciences, University Of Novi Sad.

What skills is Stevan Kosijer known for?

Stevan Kosijer has skills like Git, Amazon Web Services, Public Speaking, Maven, Continuous Integration And Continuous Delivery, C, Mongodb, Kibana, Object Oriented Programming, Jenkins, Angular, Representational State Transfer.

Who are Stevan Kosijer's colleagues?

Stevan Kosijer's colleagues are Bhavani Atluri, Pinki Samal, Maja Ring, Chamodya Ganegamage, Kaushlendra Gupta, Abul Kasim Barbhuiya, Balakrishna Avulapati.

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