Cristian Bancu, Developer in Bucharest, Romania
Cristian is available for hire
Hire Cristian

Cristian Bancu

Verified Expert  in Engineering

Bio

Cristian is a senior .NET full-stack developer, consultant, contractor, and freelancer with 11+ years of experience. He uses his expertise, skills, and passion to architect, design, and implement top-of-the-line software solutions for companies worldwide, such as UiPath or Adobe. Cristian focuses on exceptional user experience.

Portfolio

UiPath
C#.NET, Angular, Azure, Kubernetes, Docker, Terraform, Microservices, ASP.NET...
ThoughtWorks
.NET, Angular, Kubernetes, Azure, Microservices, ASP.NET, Team Leadership...
ThoughtWorks
.NET, Angular, Multithreading, Microservices, Cassandra, RxJS, Apache Kafka...

Experience

  • C# - 10 years
  • C#.NET - 10 years
  • Web Development - 9 years
  • Microservices - 6 years
  • Angular - 6 years
  • Docker - 5 years
  • Kubernetes - 4 years
  • React - 3 years

Availability

Part-time

Preferred Environment

.NET, Angular, Microservices, Azure

The most amazing...

...thing I've developed is a mobile app for a job search engine from France, ranked in the top 10 on Google Play and Apple Store.

Work Experience

Senior .NET Full-stack Engineer and Team Lead

2020 - 2022
UiPath
  • Increased customer adoption rate by 3% for enterprise and 17% for a community just two months after release by empowering organization admins to govern user or group features with ease.
  • Leveraged a robust architecture backed by fully Terraformed resources easily deployed in any region, which reduced cloud expenses by over 30%.
  • Grew the development team from two to six members in seven months and increased delivery time by 60%.
Technologies: C#.NET, Angular, Azure, Kubernetes, Docker, Terraform, Microservices, ASP.NET, Cloud Computing, Performance Tuning

Senior .NET Full-stack Engineer and Team Lead

2018 - 2020
ThoughtWorks
  • Decreased client-reported issues by 24% by designing a multiple-stage system that transitioned from monolith architecture to microservices by gradually rolling out features.
  • Boosted productivity by one day per 2-week sprint by simplifying the release cycle, allowing individual deployment for each team owning the microservice, and shifting more focus on development.
  • Reduced major bugs three times by coordinating four other developers and assigning feature owners to core areas with periodical cycling. Held multiple knowledge transfer sessions among all members.
Technologies: .NET, Angular, Kubernetes, Azure, Microservices, ASP.NET, Team Leadership, Docker, Entity Framework

Senior .NET Full-stack Engineer

2017 - 2018
ThoughtWorks
  • Increased monthly revenue by 6% and click-through rate by 24% by fine-tuning the recommendation engine using state-of-the-art A/B testing.
  • Allowed clients to display ads to a broader audience and increase their sales by reducing info page load times and empowering application autoscaling, which resulted in a 25% reduction in the opt-out rate. Used Kubernetes HPA.
  • Performed optimizations by vertically sharding tables with intensive queries and employing CDN.
Technologies: .NET, Angular, Multithreading, Microservices, Cassandra, RxJS, Apache Kafka, Architecture

Senior React Native Front-end Engineer

2016 - 2017
ThoughtWorks
  • Replaced existing web-based and PWA solutions with highly-intuitive native Android and iOS applications, which increased the adoption rate from negative 4% to a healthy 15% MoM.
  • Reduced maintainability costs by 50% and increased development time by 40% using React Native for both platforms. Guided and mentored two senior developers.
  • Adapted existing and new features while maintaining close communication with a client.
Technologies: Node.js, React, React Native, PWA, Android

Senior .NET Full-stack Engineer

2014 - 2016
Sparkware Technologies SRL
  • Increased sales by 21% by replacing the existing CRM solution with a highly-maintainable web-based application, rolling out features gradually, and transitioning from Angular to Angular 2+.
  • Enhanced unit, integration, and E2E testing on the back end and front end by covering all business-critical areas, reducing client-reported issues by 50%.
  • Maintained bug-free transition and service-level agreements.
Technologies: .NET, C#, Angular, AngularJS, Selenium, NUnit, Docker, SignalR

Senior .NET Engineer

2011 - 2014
Ixia, a Keysight Business
  • Enriched reporting capabilities by over 50% by designing and implementing a cross-platform solution accessible via a web interface that covered out-of-the-box queries and the resulting aggregation metrics.
  • Provided pluggable capabilities by allowing clients to define their aggregation and query mechanisms with minimal effort through a crystal-clear exposed API, which resulted in a 40% reduction in support costs.
  • Performed in-depth research on client requirements.
Technologies: Windows Presentation Foundation (WPF), WFS, C#.NET, Selenium, Docker

Software Engineer

2011 - 2011
Adobe
  • Implemented a format converter that decreased the sign-out rate by 25% and continuously measured its adoption rate by implementing a clear telemetry system collecting relevant user data.
  • Increased the adoption rate of InDesign by 7%, enriching the existing plugin with the format converter and adapting existing and new features while maintaining close communication with the clients.
  • Oversaw the launch process, ensuring a smooth integration for existing clients.
Technologies: Java, Unit Testing

Java Software Engineer

2011 - 2011
Adobe
  • Decreased the sign-out rate by 25% by implementing a format converter and measuring its adoption rate with a telemetry system collecting relevant user data.
  • Enriched the existing plugin with the format converter and customized existing and new features, resulting in a 7% increase in the adoption rate of InDesign.
  • Ensured a low bug rate while maintaining close communication with peers.
Technologies: Java, PyCUDA, Neural Networks, NumPy, Python

Experience

Mobile App for Recruitment Agency

The project involved replacing existing web-based and PWA solutions with highly-intuitive native Android and iOs applications. I played a key role in customizing existing and new features while actively communicating with the client. The result was an increase in the adoption rate from a negative 4% to a healthy 15% MoM.

Education

2011 - 2013

Master's Degree in Computer Science

POLITEHNICA University of Bucharest - Bucharest, Romania

2007 - 2011

Bachelor's Degree in Computer Science

POLITEHNICA University of Bucharest - Bucharest, Romania

Skills

Libraries/APIs

Entity Framework, RxJS, Node.js, React, SignalR, NumPy

Tools

Terraform

Languages

C#.NET, C#, Java, Python

Frameworks

Angular, ASP.NET, .NET, React Native, AngularJS, Selenium, NUnit, Windows Presentation Foundation (WPF)

Paradigms

Microservices, Unit Testing

Platforms

Azure, Kubernetes, Docker, Apache Kafka, Android

Storage

Cassandra

Other

Artificial Intelligence (AI), Machine Learning, Web Development, Computer Science, Cloud Computing, Performance Tuning, Team Leadership, Multithreading, Architecture, PWA, WFS, PyCUDA, Neural Networks

Collaboration That Works

How to Work with Toptal

Toptal matches you directly with global industry experts from our network in hours—not weeks or months.

1

Share your needs

Discuss your requirements and refine your scope in a call with a Toptal domain expert.
2

Choose your talent

Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.
3

Start your risk-free talent trial

Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.

Top talent is in high demand.

Start hiring