Gian Piero Bandieramonte

Senior Software Engineer

React, TypeScript & .NET Fintech & Product Engineering

I have 15+ years of experience building and modernizing business-critical products across fintech, healthcare, and enterprise environments. I specialize in modern frontend applications, backend/API systems, and integration-heavy products where reliability, correctness, and maintainability matter.

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15+ yearssoftware engineering
Toptalvetted senior talent
Full-stackfrontend, backend & integrations
Fintech + healthcarehigh-stakes product domains

Selected evidence

Engineering outcomes, not proficiency scores

My work spans product modernization, financial systems, medical software, and partner integrations—with results that can be explained clearly.

≈15%

Sales growth contribution

Customer-requested currency-exchange functionality delivered through FIX at November First.

7+

Partner API integrations

REST integrations delivered for Venteur’s healthcare and insurance platform.

51%

Precision improvement

Rewritten C++ controller software for a breathing-pattern reproduction robot at Brainlab.

≈8%

Registration precision

Improved ExacTrac image-registration precision through rigorous verification work.

Featured projects

Recent, recruiter-relevant work

View all projects

01

Independent product • Android

108 Again

End-to-end ownership of a production React Native app with an offline-first data model, optional cloud sync, authentication, tracking, statistics, calendar workflows, and backup/import/export.

  • React Native
  • TypeScript
  • Expo
  • SQLite
  • Supabase

Read case study

02

Toptal engagement • Frontend modernization

Life-Assist

Migrated major Knockout.js functionality to React and refactored C#/.NET backend code to improve maintainability, responsiveness, usability, and scalability.

  • React
  • JavaScript
  • C#
  • .NET
  • SQL

Read case study

03

November First • Payments & FX

FIX payment engine

Owned important currency-exchange and payment functionality, including real-time pricing, quotes, workflows, APIs, and automated integration testing.

  • C#
  • ASP.NET
  • QuickFIX
  • MongoDB
  • Testing

Read case study

04

Toptal engagement • Healthcare integrations

Venteur

Backend engineering for an integration-heavy healthcare and insurance product, including seven or more partner REST APIs and stronger exception handling.

  • C#
  • .NET
  • REST APIs
  • Healthcare

Read case study

05

Toptal engagement • Trading UI

Abruzzi Spur

Built a usable React interface for cryptic, streamed options data, including configurable tables, filtering, search, and real-time WebSocket updates.

  • React
  • Node.js
  • WebSockets
  • Trading

Read case study

06

Brainlab • Medical software

ExacTrac

High-reliability C++ and C# engineering for radiotherapy systems, combining automated and manual testing with measurable precision improvements.

  • C++
  • C#
  • Medical
  • Testing

Read case study

Experience

Senior engineering across products and domains

I work comfortably across frontend, backend, data, testing, and external integrations—while keeping the product goal and operational risk in view.

Explore experience

2021–Present

Toptal

Senior Software Engineer

Life-Assist • Venteur • Abruzzi Spur

2017–2019

November First

Senior Software Engineer

International payments • FX • FIX integrations

2013–2016

Brainlab

Software Engineer / Consultant

Medical software • C++ / C# • Quality engineering

Technical breadth

Built around dependable product delivery

Frontend

React, React Native, TypeScript, JavaScript, HTML, CSS

Backend & APIs

C#, .NET, ASP.NET, Node.js, Python, REST APIs

Data

PostgreSQL, SQL Server, MySQL, MongoDB, SQLite

Engineering

API integrations, automated and integration testing, Git, architecture, modernization, product development

Domains

Fintech, payments, FX/trading systems, healthcare, financial software

Recommendations

Trusted in demanding environments

“Gian is exactly what I look for in a contract developer. He has superior technical skills and a pleasant, service-minded attitude… The launch was flawless, thanks to Gian’s solid coding practices and thorough responsive design testing.”

Brien MaloneIT Director, Life-Assist

“Besides being a skilled programmer, Gian Piero also has excellent knowledge within the financial arena, and such combination of skills is quite rare and not easy to find… I believe that Gian Piero can be a valuable asset in any programming team as he quickly is able to add value.”

Mikael NilssonCEO & Founder, November First

“I worked with Gian for 3.5 years at Brainlab. He showed the ability to work autonomously by programming in C++ new functions for Brainlab’s flagship product, ExacTrac®. He designed unit tests for many modules, which quickly found flaws in software and enhanced its quality.”

Martin GutzeitSenior Software Engineer, Brainlab

“Gian Piero is a really sharp professional, he is truly a guy that you can count on… someone that you can trust in the management of your finance; he found a way to provide me growth in my investment and a good return from them.”

Rafael Cordero LugoDirector, Alliance International Advisors LLC

“Gian Piero is a trustworthy and insightful analyst. He has deep knowledge of the fixed income market especially in emerging market sovereigns.”

Ivan AponteOwner, Aurielectric

“Gian Piero is a very responsible person and so smart in IT area. He always wants to know more about everything. He learns very fast and by himself. One can be proud of working with him.”

Simy BlomerClient Partner, Gartner

“With passionate dedication, Gian Piero created a top tier framework to research fixed income securities. Most notable were his programming and quantitative skills, which were a critical asset in the creation of unusual statistical models for ranking bonds.”

Marco Aurelio VillegasCEO, Arca Análisis Económico

“Because patient lives depend on the quality of such software, we have rigorous QM standards. The software coded and released by Gian worked as expected and has so far produced minimal complaints or bugs. He became highly proficient in C++ and .NET, using C#, WPF and XAML.”

Peter JacobiSoftware Project Manager, Brainlab

“Gian Piero leveraged his proficiency in quantitative analysis and modelling to excel in the financial discipline. He focused his hard skills to the creation of models that thoroughly assessed and selected an ample array of ETFs for our portfolios.”

David AlayonDirector and Adviser

Recommendations 1–3 of 9

Let’s talk

Building a product where engineering quality matters?

I’m open to senior engineering opportunities, technical conversations, and selected consulting work.

Contact me