Jovan Sajlović - Founder / Senior Software Engineer

Q: Where is Jovan based?

Jovan is based in Banja Luka, Bosnia and Herzegovina and can operate in on-site , hybrid , and remote work models.

Q: What languages does Jovan speak?

Jovan speaks the following languages: Bosnian (Native), Croatian (Native), Serbian (Native), German (Advanced), English (Advanced) .

Q: How many years of experience does Jovan have?

Jovan has at least 10 years of experience. During this time, Jovan has worked in at least 6 different roles and for 9 different companies . The average length of individual experience is 1 year . Note that Jovan may not have shared all experience and actually has more experience.

Q: What is Jovan's latest experience?

Jovan's most recent position is Founder / Senior Software Engineer at dnr sole proprietorship .

Q: What companies has Jovan worked for in recent years?

In recent years, Jovan has worked for dnr sole proprietorship , Croz & Ongulus , AGCO Corporation , Raiffeisen Bank , and OTP Bank .

Q: Which industries is Jovan most experienced in?

Jovan is most experienced in industries like Information Technology , Agriculture , and Banking and Finance . Jovan also has some experience in Automotive , Energy , and Insurance .

Q: Which business areas is Jovan most experienced in?

Jovan is most experienced in business areas like Information Technology , Product Development , and Operations . Jovan also has some experience in Supply Chain Management , Business Intelligence , and Project Management .

Q: Which industries has Jovan worked in recently?

Jovan has recently worked in industries like Agriculture , Banking and Finance , and Information Technology .

Q: Which business areas has Jovan worked in recently?

Jovan has recently worked in business areas like Information Technology , Product Development , and Project Management .

Recommended expert

Banja Luka, Bosnia and Herzegovina

Experience

Jan 2023 - Present

3 years 3 months

Founder / Senior Software Engineer

dnr sole proprietorship

Exclusive partnership with AJA IT-Services GmbH
Responsible for the development, optimization, and maintenance of backend systems/services
Conducted code reviews and provided technical support for team members

Apr 2022 - Sep 2022

6 months

Student Internship

Croz & Ongulus

Organized summer internship and mentored 4 students
Planned and promoted the internship and the internal Absence Planner application
Assessed candidates
Acted as tech lead, Scrum Master, and Product Owner during the project

Jan 2022 - Jan 2023

1 year 1 month

AGCO Corporation

Developed Java/SpringBoot microservices for communication with Fendt tractor terminals, machine onboarding, communication with Agrirouter, file storage, and file format conversion (Shapefile, KML, geojson)
Utilized Java, SpringBoot, MySQL, ActiveMQ, Robot Framework, Docker, Kubernetes, AWS Cloud, GitLab CI, Helm, JUnit, and Flyway

Dec 2021 - Jan 2022

2 months

Raiffeisen Bank

Developed a service for the SME lending process
Implemented a complex integration with the Bisnode external system
Utilized Java, Spring, Hibernate, MS SQL, REST, SOAP, Git, Maven, and Liquibase

Feb 2021 - Nov 2021

10 months

OTP Bank

Developed an end-to-end solution for online bank account opening including customer data collection, integration with the core banking system, and Asseco Live 2.0 video ID system
Utilized Java, Spring, Hibernate, MS SQL, REST, Git, and Maven

Jan 2019 - Jan 2023

4 years 1 month

Senior Software Engineer / Team Leader

Ongulus Software Development

Worked on projects in various industries such as finance/banking, agriculture, and conglomerates
Developed and maintained backend systems/services
Performed code reviews
Led and mentored team members
Provided technical and DevOps support
Reported to upper management
Conducted technical interviews and applicant evaluations

Dec 2018 - Jan 2021

2 years 2 months

Mach AG

Developed and maintained an ERP software solution for administrative management in finance, human resources, ECM, and business intelligence
Utilized Java, Spring, Hibernate, Oracle/Firebird/MSSQL, Git, Gradle, Maven, JUnit, and Camunda BPM

Aug 2016 - Dec 2018

2 years 5 months

Junior Software Engineer

Ongulus Software Development

Worked on projects in the automotive, oil, insurance, and government sectors
Responsible for backend and frontend development and maintenance

Aug 2016 - Nov 2018

2 years 4 months

Early Career Projects

Various Clients

Developed and maintained backend systems for automotive, insurance, oil, and government applications integrating with SOAP/REST APIs
Contributed to document management, tax administration, and warehouse systems to improve operational workflows
Clients included Red Bull and Renault
Utilized Java, Groovy, Grails, Hibernate, Ext JS, Maven, Gradle, Jasper, Git, Activiti BPM, and Liquibase

Aug 2015 - Aug 2015

1 month

Software Engineer Intern

Lanaco Company

Utilized Java, SpringBoot, ClickHouse, Oracle, Calcite, GraphQL, Docker, Kubernetes, Google Cloud Platform, Bitbucket, Jenkins, Helm, JUnit, Maven, and RabbitMQ

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Agriculture, Banking and Finance, Automotive, Energy, and Insurance.

Information Technology

Agriculture

Banking and Finance

Automotive

Energy

Insurance

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Product Development, Operations, Supply Chain Management, Business Intelligence, and Project Management.

Information Technology

Product Development

Operations

Supply Chain Management

Business Intelligence

Project Management

Summary

Seasoned Java Software Engineer with 9 years of experience developing, maintaining, and optimizing robust software solutions across industries, including finance, agriculture, automotive, and government. Skilled in Java, the Spring ecosystem, and the microservices architecture, leveraging modern DevOps tools like Docker, Kubernetes to build scalable, high-performance systems. Demonstrated leadership in guiding development teams, mentoring junior engineers, and driving agile methodologies to ensure timely project delivery. Recently focused on advancing expertise in cloud-native architectures and performance optimization, particularly in regulatory reporting solutions for the financial sector, delivering robust systems that enhance operational efficiency and compliance.

Skills

Programming: Java, Groovy
Frameworks: Spring (Boot, Security, Mvc, Webflux, Data, Actuator, Sleuth...), Hibernate, Apache Calcite, Graphql, Grails, Jasper, Axon
Build Tools: Maven, Gradle
Databases: Mysql, Postgresql, Oracle, Ms Sql, H2, Ibm Db2 (Relational), Clickhouse (Olap), Liquibase, Flyway (Schema Migration)
Ide: Intellij Idea
Devops: Git, Gitlab (Ci), Github (Actions), Bitbucket, Jenkins, Docker, K8s, Helm, Openshift, Aws, Gcp
Protocols, Messaging: Rest, Soap, Activemq, Rabbitmq
Front-end: Javascript, Ext Js
Bpm: Camunda, Activiti
Project Management: Jira, Confluence, Ibm Rtc, Azure Devops
Methodologies: Agile, Scrum, Kanban
Soft Skills And Practices: Clean Code, Team Leadership, Mentoring

Languages

Bosnian

Native

Croatian

Native

Serbian

Native

German

Advanced

English

Advanced

Education

Oct 2012 - Jun 2016

Faculty of Natural Sciences, Mathematics and Computer Science

BSc in Mathematics and Computer Science · Mathematics and Computer Science · Banja Luka, Bosnia and Herzegovina · GPA: 9.18/10.00

Certifications & licenses

Mensa International

Oracle Certified Associate, Java SE 8

nrich | Open source / Croz

Statistics

Experience

Total positions 10

Experience in Information Technology 5.5 y

Avg length 1 y 7 m

Longest experience 4 y

Expertise

Recent roles Founder / Senior Software Engineer, Student Internship, Senior Software Engineer / Team Leader

Main industries Information Technology, Agriculture, Banking and Finance

Main business areas Information Technology, Product Development, Operations

Qualifications

Highest degree Bachelor

Certifications earned 2

Profile

Created

December 2025

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Jovan based?

Jovan is based in Banja Luka, Bosnia and Herzegovina and can operate in on-site, hybrid, and remote work models.

What languages does Jovan speak?

Jovan speaks the following languages: Bosnian (Native), Croatian (Native), Serbian (Native), German (Advanced), English (Advanced).

How many years of experience does Jovan have?

Jovan has at least 10 years of experience. During this time, Jovan has worked in at least 6 different roles and for 9 different companies. The average length of individual experience is 1 year. Note that Jovan may not have shared all experience and actually has more experience.

What roles would Jovan be best suited for?

Based on recent experience, Jovan would be well-suited for roles such as: Founder / Senior Software Engineer, Student Internship, Senior Software Engineer / Team Leader.

What is Jovan's latest experience?

Jovan's most recent position is Founder / Senior Software Engineer at dnr sole proprietorship.

What companies has Jovan worked for in recent years?

In recent years, Jovan has worked for dnr sole proprietorship, Croz & Ongulus, AGCO Corporation, Raiffeisen Bank, and OTP Bank.

Which industries is Jovan most experienced in?

Jovan is most experienced in industries like Information Technology, Agriculture, and Banking and Finance. Jovan also has some experience in Automotive, Energy, and Insurance.

Which business areas is Jovan most experienced in?

Jovan is most experienced in business areas like Information Technology, Product Development, and Operations. Jovan also has some experience in Supply Chain Management, Business Intelligence, and Project Management.

Which industries has Jovan worked in recently?

Jovan has recently worked in industries like Agriculture, Banking and Finance, and Information Technology.

Which business areas has Jovan worked in recently?

Jovan has recently worked in business areas like Information Technology, Product Development, and Project Management.

What is Jovan's education?

Jovan holds a Bachelor in Mathematics and Computer Science from Faculty of Natural Sciences, Mathematics and Computer Science.

Does Jovan have any certificates?

Jovan has 2 certificates. These include: Mensa International, Oracle Certified Associate and Java SE 8.

What is the availability of Jovan?

Jovan is immediately available full-time for suitable projects.

What is the rate of Jovan?

Jovan's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.