Clipper, Visual C++, VBScript, Java, HTML, CSS, Javascript, VRML

SQL Server, Oracle, MA Access

Freelance (1994-1999)

Undergraduate Studies (1994-1999)

Master Studies (1999-2002)

PhD Studies (2002-2005)

Formal Education (1994-2005)

Visual C++, VBScript, ASP, HTML, CSS, JavaScript

SQL Server, Oracle, MA Access

Windows, UNIX, Solaris

CKISIP (Belgrade, 1999-2005)

AMICO: Java, Javascript, HTML5, CSS, D3, SVG, JavaFX

CWI (2006-2008)

Sketchify: Java, Javascript, HTML5, CSS, D3, SVG, JavaFX

TU/e (2008-2011)

Java, HTML, CSS, jQuery, Javascript, Spring, D3, SVG, Backbase Portal, OAuth2

Eclipse, IntelliJ, SVN, Jenkins, Jira, Maven

Backbase (2012-2013)

Java, Javascript, Angular, Vue.js, HTML5, CSS, D3, SVG

AWS, MySQL, MongoDB

IntelliJ, Eclipse, Git, SVN, Jenkins, Jira, Maven, NPM, Security Tools

Software analysis tooling (Hands-On)

Java (J2EE, Spring), .NET (C#, VB), PHP, HTML+JS+CSS (Angular, React)

Pega, Mendix, BI/ETL/Big Data (Informatica, OBIEE, Hadoop, SQL)

Public Cloud (AWS, Azure)

Client projects (Analyzed)

SIG (2013-2019)

Angular, AWS (Lambdas, S3, RDS), Serverless Framework

Mobile: Ionic, PWA

WebGL, Unity, Oculus VR

HLS (HTTP Live Streaming)

Legacy: PHP, MySQL, WordPress

Cloud-native (AWS) video-on-demand platform

Incision (2019-2020)

Java, JavaScript, Python, TypeScript

HTML5, CSS, D3, SVG

Architecture Analytics Platform (Hands-On)

Java, Go

AWS (Lambda, S3, CloudFront, RDS, Cognito)

GCP

Legacy: PHP, MySQL, WordPress

Cloud-native marketplace platform

eBay (2020-2022)

Java, JavaScript, Python, TypeScript

HTML5, CSS, D3, SVG

Architecture Analytics Platform (Hands-On)

TypeScript, NodeJS, C#, .NET, React, Node.js, Python, Swift, Kotlin, React

AWS (Lambda, ECS, S3, CloudFront, SQS, SNS, RDS, DynamoDB, OpenSearch, Athena, Glue...)

GitHub, CircleCI, Terraform, DataDog

Angular, Vue, PHP

Java, MySQL, WordPress

Kubernetes, Kafka, Elastic Search

Physical data centers

GCP

TFS, GitLab, Bitbucket, Jenkins

Legacy

Real-estate platform architecture

AVIV Group (2022-today)

Java, Maven, AWS, Step Functions, Docker

Analysis: Java, C#, Python, JS, TS, Rust, C, C++, D, Go, PHP, Ruby, Perl, Swift, Kotlin, Dart...

Sokrates (2019-)

Getting Job Done as Engineer

Realism in Planning as a Manager

Pragmatism in Executive Roles

Authority in Vendor Negotiations

Technical Authority among Engineers

Value & Impact

Hard Skills (1994-today)

Team building

Career development

Performance management

Frontend Developer Growth

Inappropriate Behavior

Interesting / Difficult cases

SIG (2015-2019)

Near-shore team forming

Hiring

Defining a role and coaching product owners

Stopping Default Partner Engagement

Building near-shore team from scratch

Growing Product Owner Role

Interesting / Difficult cases

Incision (2019-2020)

Team building

Team optimizations and re-orgs

Managing senior individual contributors

Managing managers

Defining career ladder (architecture and engineering)

Performance management

Career development

Hiring

Co-designing re-orgs, rationalizations & headcount reductions

Career Ladder separate vs. merged with Engineering (Staff+ roles)

Principal Architects Growth

9.0 (8.9 to 9.1) Score for 'Management Support', 'Autonomy', and 'Peer Relationships' (3 years in a row)

Positive

Performance management exits

Lay-offs

Product Org (overlapping scope)

Engineering Directors (ways of working and mandate)

Conflicts

Complicated

Interesting / Difficult cases

AVIV Group (2022-today)

Formal People Management (2015-today)

Software Engineering Students / Interns Mentoring and Thesis Supervision

Teaching master and undergraduate courses on FON Belgrade

Teaching undergraduate courses on Military Technical Academy Belgrade

Belgrade (2000-2005)

Master students project supervision

Teaching master and undergraduate courses on VU Amsterdam

CWI (2006-2008)

PhD student daily supervision

Master students project supervision

Post-master projects (USI)

TU/e (2008-2012)

Partner and client training and mentoring

Onboarding and training new hires

Backbase (2012-2013)

Mentoring Technical Consultants

SIG (2013-2019)

Product owner definition and mentoring

External team mentoring

Incision (2019-2020)

Mentoring Senior Architects

Organizing Guilds and Summits

eBay (2020-2022)

1:1 Mentoring of all Senior and Principal Architects

Ad-hoc mentoring Tech Leads in Other Teams

Organizing Guilds and Summits

AVIV (2022-today)

Coaching & Mentoring (2000-today)

Small Software Companies

Small Healthcare Companies

Small Business

Military Technical Academy

Military Institute of Technology

Military Academy

Ministry of Defence

Military Research Institutes

Military and Defence Sector

Institute for Nuclear Sciences Vinca

Institute for Physics Belgrade

Institute for Chemistry Belgrade

Research Institutions

Belgrade

Researchers

University Professors

Graduate Students

Master Students

PhD Students

NL Research Funding Committees

EU Research Funding Committees

High-Tech Industrial Partners

CWI (2006-2008)

Industrial Designers

Experience Designers

Researchers

University Professors

Graduate Students

Master Students

PhD Students

NL Research Funding Committees

EU Research Funding Committees

High-Tech Industrial Partners

TU/e (2008-2012)

CTO

Software Engineers

Product Owners

Engineering Managers

Architects

Sales

Clients

Backbase (2012-2013)

CTOs (internal and clients)

Management Consultants

Technical Consultants

B2B Sales (demos, visits, support)

Software Engineers

Architects

Investors (M&As, Technical Due Dilligences)

C-level executives (Clients)

Project Managers (Clients)

Program Managers (Clients)

Product Managers (Clients)

SIG (2013-2019)

CEO (manager)

CMO (marketing)

CMO (medical)

COO

CFO

Incision (2019-2020)

Group CTO

CTOs

Engineering Directors

Product Directors

eBay (2020-2022)

CTO

CFO

COO

CMO

Investors

Engineering Directors

Product Directors

AVIV (2022-today)

Stakeholder Engagements (2000-today)

Serbia

Norway

Greece

Spain

Belgrade (1999-2005)

The Netherlands

Germany

France

Italy

Spain

USA

CWI (2006-2008)

The Netherlands

UK

TU/e (2008-2012)

The Netherlands

Switzerland

Backbase (2012-2013)

The Netherlands

Germany

France

Belgium

USA

Denmark

Indonesia

Malaysia

SIG (2013-2019)

The Netherlands

Egypt

Serbia

Incision (2019-2020)

The Netherlands

Germany

France

Spain

Italy

Belgium

Denmark

UK

Canada

USA

Australia

China

South Africa

Belarus

Austria

eBay (2020-2022)

Germany

France

Belgium

Israel

UK

Croatia

AVIV (2022-today)

International Experience (2000-today)

Getting Job Done as a Manager

Growing People

Effective Collaboration with Diverse Stakeholders

Effective Collaboration with Diverse Cultures

Value & Impact

Soft Skills (2000-today)

Economic risk modelling of scenarios (50+ clients)

Tech strategy reviews and roadmaps (50+ clients)

Risk assessments (50+ clients)

Due Diligences

SIG (2013-2019)

Defining Product & Tech Strategy

App-Based Product Model

Mobile strategy (prioritization)

Introducing OKR Framework (with a COO)

Incision (2019-2020)

Post-merger transparency

Public cloud migrations (DC->AWS; GCP->AWS)

eBay Data Warehouse migration

eBay (2020-2022)

Co-Design Transformation Strategy

Co-Designing Transformation Strategy Pivot

M&A & Investments and Divestments Due Diligences

Brand strategy changes (splitting and merging)

Org strategy (Internal + near-shoring strategy)

M&As analyses

AVIV (2022-today)

Influencing Big Decisions

Building Bridges Among C-Level Executives and Engineering Teams

Value & Impact

Strategy & Transformation (2013-today)

Highly regulated environments (military and defence)

Research institutions

Belgrade (1999-2005)

Higher Education

Research Sector

CWI (2006-2009)

Higher Education

Research Sector

Philips

Océ Technologies

DAF Trucks

Rademaker

TomTom

Industrial Collaborations

TU/e (2009-2012)

Digital Banking

ABN Amro

PostFinance

Banking

Backbase (2012-2013)

Maintainability

Security

Architecture

Performance

Reliability

Engineering Practices

Organization

Software Quality Analysis and Consulting

C-Level Advisory

Risk Analysis and Mitigation

Tech Strategy Review and Roadmap Co-Design

M&A Due Diligences

Management Consulting

Rijkswaterstaat

Belastingdienst

GVB

EPO

Politie

IGZ

NLO

Vlaamse Overheid

Gemeente Utrecht

ICTU

DUO

TLS / OV-Chipkaart

Vluchtelingenwerk

Jeugdzorg

Woningnet

Public Sector

ABN AMRO

BTPN

Voogd & Voogd

De Lage Landen

Finance

Exact

Centric

Mendix

OutSystems

Backbase

Product Companies

DHL

Ziggo

ProRail

T-Mobile

KPN

Vodafone

Eneco

SBM

Utilities & Telecom

Exposure to multiple industries

SIG (2013-2019)

Healthcare

Surgical Education

Incision

Online Marketplaces

Listings

eBay

Online Marketplaces

Listings

Real-Estate

B2B

AVIV Group

Connecting TO Customer Problems

Transferring Knowledge Among Domains

Bridging Domains and Teams

Value & Impact

Business & Domain Knowledge (1999-today)

Grounded Architecture Book

Design Instability Book

Research & Practice Book

obren359.com

Underhood Blog

OpenCVE

obren.io/tools

Research Articles (1996-today)

Authoring (1996-today)

IEEE Computer Society (1996-today)

ACM (1996-today)

IEEE Software Board

ACM Senior Member (2022)

Chief Architects Network

Chief Architects Forums

LAC

Professional Networks (1999-today)

OSS contribution: Main developer of Sokrates

github.com/zeljkoobrenovic/sokrates

Scan of key OSS GitHub organizations

Open Source Software (2006-today)

LinkedIn (~3,000 followers)

Twitter (~1,500 followers)

Social Media Presence (2006-today)

Personal Learning and Growth

Bringing External Ideas into Companies

Accelerated Hiring

Company Promotion

Value & Impact

Thought Leadership (1996-today)

Zeljko Obrenovic