Ioana Dinu - Architect of Java Microservices

Q: Where is Ioana based?

Ioana is based in Cluj-Napoca, Romania .

Q: What languages does Ioana speak?

Ioana speaks the following languages: English (Advanced), Romanian (Intermediate) .

Q: How many years of experience does Ioana have?

Ioana has at least 9 years of experience. During this time, Ioana has worked in at least 5 different roles and for 7 different companies . The average length of individual experience is 1 year and 11 months . Note that Ioana may not have shared all experience and actually has more experience.

Q: What is Ioana's latest experience?

Ioana's most recent position is Architect of Java Microservices at Cariad Volkswagen .

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

In recent years, Ioana has worked for Cariad Volkswagen , IBM Netherlands , Uniqa Software Services , and ServUsTech .

Q: Which industries is Ioana most experienced in?

Ioana is most experienced in industries like Information Technology (IT) , Telecommunication , and Automotive . Ioana also has some experience in Retail , Healthcare , and Advertising .

Q: Which business areas is Ioana most experienced in?

Ioana is most experienced in business areas like Information Technology (IT) , Product Development , and Business Intelligence . Ioana also has some experience in Supply Chain Management .

Q: Which industries has Ioana worked in recently?

Ioana has recently worked in industries like Telecommunication , Information Technology (IT) , and Retail .

Q: Which business areas has Ioana worked in recently?

Ioana has recently worked in business areas like Information Technology (IT) and Product Development .

Recommended expert

Cluj-Napoca, Romania

Experience

Jan 2023 - Jun 2023

6 months

Architect of Java Microservices

Cariad Volkswagen

The client, an automotive company, had serious problems with the software architecture leading to customer dissatisfaction and decreased sales. They upgraded infrastructure to top-notch technologies.
Conducted a thorough analysis of a 32-microservices architecture, culminating in formulating a comprehensive roadmap for transitioning to Java 17 and Spring Boot.
Elevated on-time delivery rates by a substantial 70% through implementing advanced Java technology. This involved generating precise stock projections and delivery timelines, contributing to improved customer satisfaction.
Secured an impressive profit surge of 70 million by architecting a dependable, high-performance microservice with a test-driven approach, achieving 85% test coverage ensuring reliability and functionality.

Oct 2021 - Jan 2023

1 year 4 months

Senior Java Software Engineer

IBM Netherlands

The client, a prominent retail corporation, aimed to enhance customer interaction and drive revenue growth by creating a novel application that delivers real-time stock updates and suggests alternatives for out-of-stock items.
Achieved a 90% reduction in instances of undelivered goods, which were initially believed to be in stock.
Elevated on-time delivery rates by 70% through implementing advanced Java technology, generating precise stock projections and delivery timelines, contributing to improved customer satisfaction.
Secured a profit surge of 70 million by architecting a high-performance microservice with a test-driven approach, achieving 85% test coverage.

Jun 2021 - Nov 2021

6 months

Senior Java Software Engineer

Uniqa Software Services

The insurance company client faced challenges in attracting and retaining long-term customers while increasing revenue due to an outdated architecture and flawed code within their Uniqa Loyalty Program application leading to underperformance, defects, and maintenance difficulties.
Achieved a 50% reduction in deployment, updating, and maintenance time by spearheading a comprehensive architectural migration from Java EE 6 to Java 11, Spring Boot, and OpenApi CodeGen framework.
Significantly improved application performance, achieving a 10x enhancement through strategic database redesign utilizing Hibernate and Spring JPA.
Ensured retention of over 2 million contracts by refactoring subpar code and executing a test-driven design architectural migration achieving 85% code coverage.

Dec 2019 - May 2021

1 year 6 months

Senior Java Software Engineer

ServUsTech

The client, Colt Technology, a global network and voice provider, failed to increase revenue and client satisfaction due to technical debt from poor architecture.
Unlocked an extra $700 M in Q1 2021 by leading a full architectural revamp, enabling 1–2 day delivery time for new feature requests while minimizing infrastructure costs.
Increased application performance by 4× faster API calls, using 25% less memory and 30% fewer database calls.
Boosted internet speed from 100 GB/s to 400 GB/s.
Ensured 100% stability in migration and zero major incidents by implementing a test-driven development approach, achieving over 80% code coverage.

Jan 2019 - Dec 2019

1 year

Lead Senior Java Engineer

ServUsTech

The client, Suzuki, a Japanese automobile manufacturer, was struggling to reduce employees' workload and save time due to lack of an automated system for internal car parts orders document management.
Saved over 2 000 hours of work weekly by implementing a new Oracle DB solution for direct and quick data access.

Apr 2018 - Apr 2019

1 year 1 month

Senior Java Software Engineer

ServUsTech

The client, Medtronic, had high debt after massive investment in a real-time patient monitoring app that underperformed due to bugs and inefficient code.
Designed an application with three times faster response time by discovering and fixing bugs, adding key database retrieval optimizations, reducing cyclomatic complexity, and designing efficient caching.
Significantly impacted increased 2019 revenue by 11.7%, resulting in total revenue of $2.391 billion.

Jan 2017 - Mar 2018

1 year 3 months

Senior Java Software Engineer

ServUsTech

The client, Motus App, was on the verge of losing clients due to high response time of their mobile and desktop APIs.
Secured 100% of clients’ contracts by engineering from scratch a lightweight mobile application with three times faster response time querying only necessary data and mapping through REST APIs.

Jan 2016 - Dec 2016

1 year

Lead Java Software Engineer

QuercusApp

The client, QuercusApp, a real-time office feedback app, was slow and unstable, crashing under 100 concurrent users.
Increased performance 10× by redesigning the full application with modern technologies and a stable database design.
Achieved stability and scalability handling 10 000 concurrent sessions by leading a team of 5 to redesign architecture with separate dev and demo environments.
Contributed to a successful KPMG acquisition by participating in the sales process, technical presentations, and marketing discussions.

May 2015 - Dec 2015

8 months

Senior Java Software Engineer

Betfair

The client, Betfair, an online betting company, failed to grow its user platform and maximize income due to production bugs in financial transactions and regulators' microservices.
Improved microservices performance by 25% and increased income by 10% by upgrading the JMS messaging system to Kafka and designing new performant features.

Jun 2012 - Jun 2013

1 year 1 month

Java Software Engineer

LiveRail

The client, LiveRail (now part of Facebook), struggled to accelerate income growth due to lack of reports for ad targeting and real-time delivered ads count.
Increased company’s income from $40 M to $100 M annually by designing an efficient algorithm to collect and aggregate needed data, leading to a successful release in 2013 and sale to Facebook for $500 M in 2014.

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Information Technology (4.5 years), Automotive (1.5 years), Retail (1.5 years), Telecommunication (1.5 years), Healthcare (1 year), and Advertising (1 year).

Information Technology

Automotive

Retail

Telecommunication

Healthcare

Advertising

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (9 years), Product Development (4.5 years), Supply Chain Management (1 year), and Business Intelligence (1 year).

Information Technology

Product Development

Supply Chain Management

Business Intelligence

Summary

I am an enthusiastic Java Architect and Contractor with 10+ years of professional experience.

As a contractor, I approach projects with an entrepreneurial mindset and a solid determination to tackle software-related business challenges, like scalability, performance, and enterprise-level organization.

One of the standout accomplishments in my career was the development of a Java application, a solo endeavour, which contributed to Colt Technology's revenue by a staggering $700M.

My characteristic patience and effective communication skills enable me to foster collaboration and bring out the best in my team members.

I am exclusively seeking fully remote positions with minimal travel commitments, ideally no more frequent than once every two months.

Skills

Java (10 Years)
Microservices (9 Years)
Agile Scrum (9 Years)
Spring Rest (9 Years)
Spring Jpa (9 Years)
Hibernate (9 Years)
Spring Boot (7 Years)
Spring Security (6 Years)
Oracle (5 Years)
Nosql (4 Years)
Postgresql (4 Years)
Ci/cd Workflow (3 Years)
Jenkins (2 Years)
Apache Kafka (2 Years)
Apache Camel (2 Years)
Spring Batch (2 Years)
Datadog (2 Years)
Webflux (2 Years)
Hystrix (1 Year)
Javascript (1 Year)
Python (1 Year)
Software Architecture
Team Leadership
Software Development
Tech Recruitment Consultancy
Project Development Evaluation
Baeldung Java Technical Contribuitor

Languages

English

Advanced

Romanian

Intermediate

Education

Oct 2012 - Jun 2014

Babes-Bolyai University

Masters in Distributed Systems in Internet · Distributed Systems in Internet · Cluj-Napoca, Romania

Oct 2009 - Jun 2012

Babes-Bolyai University

Bachelors of Computer Science · Computer Science · Cluj-Napoca, Romania

Profile

Created

November 2023

Last Update

November 2024

Need a freelancer? Find your match in seconds.

Try FRATCH GPT

Frequently asked questions

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

Where is Ioana based?

Ioana is based in Cluj-Napoca, Romania.

What languages does Ioana speak?

Ioana speaks the following languages: English (Advanced), Romanian (Intermediate).

How many years of experience does Ioana have?

Ioana has at least 9 years of experience. During this time, Ioana has worked in at least 5 different roles and for 7 different companies. The average length of individual experience is 1 year and 11 months. Note that Ioana may not have shared all experience and actually has more experience.

What roles would Ioana be best suited for?

Based on recent experience, Ioana would be well-suited for roles such as: Architect of Java Microservices, Senior Java Software Engineer, Lead Senior Java Engineer.

What is Ioana's latest experience?

Ioana's most recent position is Architect of Java Microservices at Cariad Volkswagen.

What companies has Ioana worked for in recent years?

In recent years, Ioana has worked for Cariad Volkswagen, IBM Netherlands, Uniqa Software Services, and ServUsTech.

Which industries is Ioana most experienced in?

Ioana is most experienced in industries like Information Technology (IT), Telecommunication, and Automotive. Ioana also has some experience in Retail, Healthcare, and Advertising.

Which business areas is Ioana most experienced in?

Ioana is most experienced in business areas like Information Technology (IT), Product Development, and Business Intelligence. Ioana also has some experience in Supply Chain Management.

Which industries has Ioana worked in recently?

Ioana has recently worked in industries like Telecommunication, Information Technology (IT), and Retail.

Which business areas has Ioana worked in recently?

Ioana has recently worked in business areas like Information Technology (IT) and Product Development.

What is Ioana's education?

Ioana holds a Master in Distributed Systems in Internet from Babes-Bolyai University and a Bachelor in Computer Science from Babes-Bolyai University.

What is the availability of Ioana?

Ioana is immediately available for suitable projects.

What is the rate of Ioana?

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