Ionut Baranga - Senior Software Engineer

Q: Where is Ionut based?

Ionut is based in Bucharest, Romania and prefers 100% remote projects.

Q: What languages does Ionut speak?

Ionut speaks the following languages: Romanian (Native), English (Advanced) .

Q: How many years of experience does Ionut have?

Ionut has at least 14 years of experience. During this time, Ionut has worked in at least 7 different roles and for 7 different companies . The average length of individual experience is 2 years and 8 months . Note that Ionut may not have shared all experience and actually has more experience.

Q: What is Ionut's latest experience?

Ionut's most recent position is Senior Backend Engineer at FedEx .

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

In recent years, Ionut has worked for FedEx , US Stealth Startup developing a social app , Digital Marketing SaaS Platform , Bolt.eu , and Kambi .

Q: Which industries is Ionut most experienced in?

Ionut is most experienced in industries like Information Technology , Retail , and Sport . Ionut also has some experience in Transportation and Banking and Finance .

Q: Which business areas is Ionut most experienced in?

Ionut is most experienced in business areas like Information Technology and Product Development .

Q: Which industries has Ionut worked in recently?

Ionut has recently worked in industries like Information Technology , Sport , and Transportation .

Q: Which business areas has Ionut worked in recently?

Ionut has recently worked in business areas like Information Technology and Product Development .

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Bucharest, Romania

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Experience

Feb 2024 - Present

2 years 4 months

Remote

Senior Backend Engineer

FedEx

Developed microservices and integrations to simplify compliance with international shipping regulations for collaborative shipping services
Designed and developed APIs for multi-party collaboration in shipment workflows
Participated in multi-layered client meetings to address technical questions and facilitate service delivery
Led Optimizely rollout planning for smooth adoption of new features, ensuring system stability and minimizing user disruption
Improved CI/CD speed and reliability by refactoring integration tests and migrating them to TestContainers
Monitored production logs, metrics, and alerts post-deployments to ensure system health and performance

Jun 2023 - Feb 2024

9 months

Remote

Lead Backend Engineer

US Stealth Startup developing a social app

Took full responsibility of the backend development and worked in close collaboration with the company owner, a Google Cloud Expert and a Senior Mobile Developer
Identified key user interactions areas in need for optimisation by analyzing API usage patterns from the mobile app
Boosted potential user engagement by designing and developing the backend side of a user-targeted, real-time notification system
Enhanced application security, maintainability and error handling by migrating it from JavaScript to TypeScript and adopting schema-based request validators, and introducing API integration testing
Improved data retrieval speed by optimizing MongoDB queries and indexing, including specialized geospatial queries
Improved monitoring and reduced troubleshooting time by establishing prod-dev parity and introducing structured logging

Feb 2023 - Jun 2023

5 months

Remote

Hands-on Tech Lead & AWS Solution Architect

Digital Marketing SaaS Platform

Documented the business domain and mapping out use cases, in close collaboration with the company's CEO and a team of three developers
Redesigned the platform with AWS, EKS, Fargate, DynamoDB, RDS, S3, CloudFront, and CloudFormation
Supported the dev team with production-ready Docker recipes, Kubernetes knowledge, code reviews, development & observability best practices
Decreased delivery time to less than 3 minutes by reintroducing CI/CD pipelines in GitHub actions

Jul 2021 - Dec 2022

1 year 6 months

Remote

Senior Software Engineer & Feature Lead

Bolt.eu

Led the development of new features for end-users and internal staff, from idea to positive execution, from architecting to developing and deploying using cloud-native technologies
Automated management of discrepancies between the checked-out carts and the delivered orders, saving hundreds of customer-support hours per month
Increased flexibility for end-users with backward-compatible API extensions covering multiple delivery-options support
Enriched internal tools with relevant contextual data fetched from multiple services, saving several hours of engineering support per month
Improved the database design and ease of extending features by generifying relevant database columns, in forward and backward-compatible steps with zero downtime

Jan 2018 - Jun 2021

3 years 6 months

Senior Software Engineer

Kambi

Evolved microservices and trading tools to accommodate new sports and bet offers, while increasing trading productivity and automation
Reduced complexity of existing integrations by introducing a new offer generator microservice responsible for specialized player bet-offers
Improved extensibility and speed of accommodating new bet-offer types by migrating a games-statistics component from a RESTful to a decoupled Kafka topics-based approach
Centralized configuration with radical updates of a trading-tools-configuration full-stack application
Reduced delays caused by performance issues by monitoring & correlating browser and server metrics, identifying, and fixing bottlenecks

Mar 2016 - Dec 2017

1 year 10 months

Romania

Senior Application Developer

IBM

Implemented market specific financial plans calculators services, tailored for both individual consumers (retail) and B2B clients across the German, French, and Spanish markets
Optimized the migration to new JavaEE application containers (Payara 4.0) by proactively investigating potential compatibility and performance issues
Guided and mentored new developers in onboarding processes

Aug 2014 - Feb 2016

1 year 7 months

Senior Software Engineer

Alibaba Group

Designed and implemented scalable integrations with shopping and retargeting platforms and e-commerce modules for interfacing product data feeds and integrating them into a new platform
Increased seller success by implementing a system that automatically synchronized product data to GoogleAds and AdRoll through bulk data feeds and real-time API updates
Contributed to adoption increase of a brand-new e-commerce platform by implementing automatic synchronization of product data from multiple marketplaces
Developed centralized libraries and participated in discovering, implementing, and disseminating new technologies

Aug 2012 - Jul 2014

2 years

Software Engineer

Alibaba Group

Designed and developed product import flows (RESTful APIs, FTP data feeds) that allow customers to seamlessly integrate their inventory with a new marketplace
Developed full-stack Product Admin Tools used for optimized supervision of the seller integration flows
Worked on centralized libraries and participated in discovering, implementing, and disseminating new technologies

Industry Experience

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

Experienced in Information Technology, Sport, Retail, Transportation, and Banking and Finance.

Information Technology

Sport

Retail

Transportation

Banking and Finance

Business Area Experience

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

Experienced in Information Technology and Product Development.

Information Technology

Product Development

Summary

𝗣𝗿𝗼𝗱𝘂𝗰𝘁-𝗳𝗼𝗰𝘂𝘀𝗲𝗱, seasoned software engineer helping businesses worldwide deliver 𝘀𝗰𝗮𝗹𝗮𝗯𝗹𝗮𝗯𝗹𝗲, 𝗺𝗮𝗶𝗻𝘁𝗮𝗶𝗻𝗮𝗯𝗹𝗲, and 𝗽𝘂𝗿𝗽𝗼𝘀𝗲-𝗳𝗶𝘁 solutions through 𝗲𝗻𝗱-𝘁𝗼-𝗲𝗻𝗱 𝗱𝗲𝗹𝗶𝘃𝗲𝗿𝘆.

⸻

𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 𝗛𝗶𝗴𝗵𝗹𝗶𝗴𝗵𝘁𝘀
𝟭𝟮+ 𝘆𝗲𝗮𝗿𝘀 of full-stack, backend-heavy engineering across Alibaba, FedEx, Bolt, Kambi, and IBM - navigating multi-sided marketplaces, sports-betting trading platforms at scale, and global logistics & compliance.
𝗥𝗲𝗱𝗲𝘀𝗶𝗴𝗻𝗲𝗱 a SaaS platform using 𝗔𝗪𝗦 services (EKS, DynamoDB, SQS, S3) for scalability and faster feature delivery
𝗘𝗻𝗱-𝘁𝗼-𝗲𝗻𝗱 𝗱𝗲𝗹𝗶𝘃𝗲𝗿𝘆 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲: requirements analysis, solution architecture, development, cloud migrations, performance and scalability improvements, technical debt reduction
𝗪𝗼𝗿𝗸𝗶𝗻𝗴 𝗿𝗲𝗺𝗼𝘁𝗲𝗹𝘆 since 2019 in distributed and autonomous teams communicating asynchronously

Skills

Architectures: Cqrs, Crud, Ddd, Event-Driven, Microservices
Backend: Java, Typescript, Spring, Node.Js, Kafka, Redis, Postgres, Mysql, Mongo
Cloud: Aws, Ec2, Eks, Cloudformation, Sqs, Sns, S3, Firebase, Google Cloud Run, Azure Aks
Frontend: Javascript, Typescript, Mui, React.Js, Redux, Tailwind
Other: Java Spring Boot, Kubernetes, Docker, Postgresql, Reactive-Systems, Microservices, Tdd, Event-Driven

Languages

Romanian

Native

English

Advanced

Education

Oct 2012 - Jun 2014

University POLITEHNICA of Bucharest

Master’s Degree · Internet Systems Engineering · Bucharest, Romania

Oct 2008 - Jun 2012

University POLITEHNICA of Bucharest

Engineer’s Degree · Computer Science · Bucharest, Romania

Statistics

Experience

Total positions 8

Experience in Information Technology 11.5 y

Avg length 1 y 8 m

Longest experience 3 y 5 m

Global Experience

Countries worked in 1 (Romania)

Primary country Romania

Expertise

Recent roles Senior Backend Engineer, Lead Backend Engineer, Hands-on Tech Lead & AWS Solution Architect

Main industries Information Technology, Sport, Retail

Main business areas Information Technology, Product Development

Qualifications

Highest degree Master

Profile

Created

May 2026

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Frequently asked questions

Have questions? Find more information here.

Where is Ionut based?

Ionut is based in Bucharest, Romania and prefers 100% remote projects.

What languages does Ionut speak?

Ionut speaks the following languages: Romanian (Native), English (Advanced).

How many years of experience does Ionut have?

Ionut has at least 14 years of experience. During this time, Ionut has worked in at least 7 different roles and for 7 different companies. The average length of individual experience is 2 years and 8 months. Note that Ionut may not have shared all experience and actually has more experience.

What roles would Ionut be best suited for?

Based on recent experience, Ionut would be well-suited for roles such as: Senior Backend Engineer, Lead Backend Engineer, Hands-on Tech Lead & AWS Solution Architect.

What is Ionut's latest experience?

Ionut's most recent position is Senior Backend Engineer at FedEx.

What companies has Ionut worked for in recent years?

In recent years, Ionut has worked for FedEx, US Stealth Startup developing a social app, Digital Marketing SaaS Platform, Bolt.eu, and Kambi.

Which industries is Ionut most experienced in?

Ionut is most experienced in industries like Information Technology, Retail, and Sport. Ionut also has some experience in Transportation and Banking and Finance.

Which business areas is Ionut most experienced in?

Ionut is most experienced in business areas like Information Technology and Product Development.

Which industries has Ionut worked in recently?

Ionut has recently worked in industries like Information Technology, Sport, and Transportation.

Which business areas has Ionut worked in recently?

Ionut has recently worked in business areas like Information Technology and Product Development.

What is Ionut's education?

Ionut holds a Master in Internet Systems Engineering from University POLITEHNICA of Bucharest and a Bachelor in Computer Science from University POLITEHNICA of Bucharest.

What is the availability of Ionut?

Ionut will be available full-time from June 2026.

What is the rate of Ionut?

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