Skip to content
Samyen Lee
FR

Open to opportunitiesOn-site · Hybrid · Remote

Samyen Lee Andriatiana — Software Engineer · FullstackI build reliable web applications, from .NET back ends to React interfaces.

  • 5 years of experience
  • .NET · React · Java · Generative AI
  • Antananarivo · UTC+3
See my experienceDownload résumé
Environments
  • Conduent
  • Kyowa Kirin Hub
  • Astek Group
  • RAPP Indian Ocean
  • BICI Madagascar
  • ESTIA
  • IT University

01 — About

A fullstack developer at home on both sides of the API.

Portrait of Samyen Lee Andriatiana
Antananarivo, Madagascar

Since 2020, I’ve been designing and maintaining web applications and enterprise systems for international organisations: Conduent, Kyowa Kirin Hub and BICI Madagascar. As a consultant in Agile teams of 6 to 10 people, I work from React components to PL/SQL packages, all the way to production releases.

Today I mostly work with .NET and C#: payment integrations, automated testing, Azure DevOps pipelines. Alongside that, I’m deeply interested in generative AI (LLMs, LangChain, RAG), which I put into practice by building a medical chatbot.

years of software development
5+
companies, including 2 international groups
3
ecosystems: .NET, JavaScript, Java, Python
4
years of higher education in computing, up to an MSc in Big Data and AI
6

02 — Experience

Five years of projects in corporate environments.

  1. Consultant · Astek Group Madagascar

    Maintaining and evolving distance-selling (VAD) applications: new modules, payment integrations, testing and production releases.

    Front end

    • Testing tool interface in VueJS
    • CPGS and Worldline payment integrations (Angular)
    • Maintenance of WPF and UWP applications

    Back end

    • Unit tests (test cases) and automated tests (test plans)
    • SQL and PL/SQL scripts, Oracle packages
    • Scripts generating installation media

    DevOps

    • Writing and updating deployment scripts
    • Versioning, build and release on Azure DevOps (TFS)
    • Production releases
    Context
    Spun off from Xerox in 2017, Conduent specialises in business process outsourcing (BPO) for transportation, healthcare, public and financial services.
    Team and method
    6 to 8 people per project (project manager, tech lead, developers) · Agile, iterations and demos
    • C#
    • .NET Core 8
    • .NET Framework 4.7.2
    • WPF
    • Angular
    • VueJS
    • REST
    • SOAP
    • Oracle
    • Azure DevOps
    Company website

  2. Consultant · RAPP Indian Ocean

    Building the KKI Hub website: CMS-driven React components, three sign-in methods and three content access levels.

    Front end

    • React templates and components bound to the Acoustic CMS
    • Content access logic: deep links, temporary access
    • Responsive pages

    Back end and environments

    • Content management in the Acoustic CMS
    • Configuring dev, staging, prelive and prod environments
    Context
    KKI Hub is the research and innovation centre affiliated with the pharmaceutical company Kyowa Kirin, dedicated to discovering new therapies.
    Team and method
    8 people (project manager, tech lead, QA, 3 developers, 2 English-speaking stakeholders) · Agile
    • JavaScript
    • React
    • Next.js
    • Acoustic CMS
    • Jira
    • Bitbucket
    • Figma
    Company website

  3. Consultant

    Building business back offices covering inventory, supplier management and invoicing, from the interface down to the database.

    Front end

    • CRUD pages: forms, lists with advanced search and pagination, reports
    • Real-time JavaScript ↔ Java communication over sockets

    Back end

    • Data imports
    • Business logic
    • Application maintenance
    Context
    BICI Madagascar is an IT services company: custom software development, website design, hosting and graphic design.
    Team and method
    10 people (project manager, 3 QA, 6 developers) · Agile
    • Java
    • Spring
    • JSP
    • Sockets
    • Oracle
    • PostgreSQL
    • Git
    Company website

03 — Projects

A few projects, explained.

012023 · Master’s final project

MadaSanté

An LLM-powered medical chatbot

A health-focused conversational assistant. It answers from medical documents, web sources and a database, suggests leads from symptoms and promotes prevention.

My roleDesign, architecture and full development, in a team of two

  • Conversational memory with LangChain
  • RAG: embeddings and a VectorStore to ground answers in documents
  • Merging heterogeneous sources: web, documents, database
  • Custom prompts and a normalised answer format
  • Python
  • FastAPI
  • LangChain
  • OpenAI API
  • React
  • PostgreSQL
  • SQLite

The journey of a question

Click a step to explore it.

“I’ve had a fever and a sore throat for three days.”

Structured answer: possible causes, advice, when to see a doctor.

022021 — 2024 · Kyowa Kirin Hub

KKI Hub

Access-controlled medical content

The site combines three sign-in methods and three access levels. I implemented the logic deciding which content each visitor can see, including through deep links and temporary access.

My roleReact / Next.js front-end developer

  • OneKey, DocCheck and SelfCert sign-in
  • Hierarchical access levels A < B < C
  • Deep links and temporary access
  • React templates driven by the Acoustic CMS
  • React
  • Next.js
  • JavaScript
  • Acoustic CMS
  • Figma

The access model

Simplified illustration: pick a level.

Sign in withOneKeyDocCheckSelfCert

Access level

  • AContent AAvailable
  • BContent BLocked
  • CContent CLocked

Deep links and temporary access open targeted content without changing level.

032024 — present · Conduent

Distance Selling

Payments and delivery pipeline

Evolving business-critical applications without breaking what works: new modules, payment provider integrations, and a controlled testing and deployment chain all the way to production.

My role.NET fullstack developer

  • CPGS and Worldline payment integrations
  • Unit, regression and integration testing
  • Deployment scripts and installation media
  • Build, release and production on Azure DevOps
  • C#
  • .NET Core 8
  • Angular
  • VueJS
  • Oracle
  • Azure DevOps

From commit to production

Every change goes through every stage.

  1. 01Development
  2. 02Unit tests
  3. 03Regression
  4. 04Integration
  5. 05Build and release
  6. 06Production
See my GitHub

04 — Expertise

Different stacks, the same standards.

Main stack over time
’20’21’22’23’24’25’26
Java · Spring
BICI MadagascarNov 2020 — Nov 2021
React · Next.js
Kyowa Kirin HubNov 2021 — Jun 2024
Python · LLM
MadaSantéJan 2023 — Dec 2023
.NET · C#
ConduentJun 2024 — today

Languages

  • C#
  • JavaScript
  • TypeScript
  • Java
  • Python
  • SQL · PL/SQL

Front end

  • React
  • Next.js
  • Angular
  • VueJS
  • WPF · UWP

Back end

  • ASP.NET Core MVC · API
  • Entity Framework
  • Spring
  • Node.js
  • FastAPI · Flask
  • REST · SOAP

Data

  • SQL Server
  • PostgreSQL
  • Oracle
  • SQLite

DevOps and tools

  • Azure Pipelines
  • GitLab CI/CD
  • Docker
  • Kubernetes
  • Git · TFS · Bitbucket
  • Jira · Confluence

Generative AI

  • LLMs · OpenAI
  • LangChain
  • RAG
  • VectorStore · embeddings
  • Prompt engineering

How I work

  1. 01Agile and Scrum: dailies, sprint planning, demos, retrospectives
  2. 02Effort estimation and realistic planning
  3. 03Modular, scalable code: design patterns, SOLID principles
  4. 04Documentation: specifications, test reports, APIs (Swagger)
  5. 05Incident handling: debugging, post-mortem analysis
  6. 06Cross-functional work with business, UX/UI and infrastructure
  7. 07Process optimisation
  8. 08Preventive and corrective measures: backlog, regular reviews

05 — Education

Data, AI and software engineering.

  1. 2022 — 2023

    Master of Science, Big Data Intelligence for Human Augmented Reality (BIHAR)

    • Cybersecurity
    • Blockchain
    • AR/VR
    • Artificial intelligence

    ESTIA, France

  2. 2021 — 2022

    Master 1 in Computer Science

    IT University, Antananarivo

  3. 2017 — 2020

    Bachelor of Computer Science, web application development

    IT University, Antananarivo

Languages

French
Fluent
English
Technical

06 — Contact

A project or a role in mind? Let’s talk.

Whether it’s a contract, a position or simply a conversation about a project, drop me a line.

Email

andriatiana.samyen@gmail.com

Elsewhere