Principal Software Engineer

Lemrabott Toulba

Currently at Fidelity Investments8+ years

I design and build scalable enterprise applications, integrate systems through APIs and event-driven messaging, develop batch processing solutions, and modernize legacy software.

  • Java
  • Spring Boot
  • Kafka
  • AWS
Email LinkedIn GitHub

Latest experience

All experience
Fidelity Investments 2025 — Present

Financial integrations and modernization

  • Java
  • Spring Boot
  • Kafka
  • AWS

Focus

Enterprise integration

REST APIs for financial systems, including external authentication, database connectivity, and money movement workflows.

Backend platforms

Java, Spring Boot, and Spring Batch, including modernization of existing applications and their build dependencies.

Event-driven systems

Kafka, RabbitMQ, and microservices for workflows that have to stay reliable in production.

Cloud delivery

AWS, including ECS, EventBridge, and CloudWatch, with Jenkins and GitHub Actions, and Datadog for production monitoring.

Experience

View all
Nov 2025 - Present Principal Software Engineer Fidelity Investments Oct 2022 - Nov 2025 Independent Software Engineer Mauribit & Operaton Jan 2021 - Sep 2022 Software Developer National Bank of Mauritania Jan 2020 - Dec 2020 Software Engineer People's Bank of Mauritania Jul 2018 - Mar 2019 Web Developer Mauribit

M.S. Computer Science, Maharishi International University

Blog

All notes

Java Microservice Architecture – Load Balancing Layer (Client-Side vs Server-Side)

Three Approaches to Integrate AWS Cognito Authentication in Your Application

My Experience Deploying Spring Boot with Docker, GitHub Actions, and AWS ECS Fargate