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Louis HalterLH

Louis Halter

Senior Backend Engineer (Go) | API, Testing & Code

€550/day
Paderborn, DE
8-15 years

Average response time: 1 hour

About Louis

Senior Backend Engineer specializing in Golang with over 8 years of experience in developing REST APIs and microservices.
I contributed to transforming numerous legacy codebases (mainly PHP) into more stable, high-performing, and maintainable Go services.

I consistently integrate unit and integration tests into CI/CD pipelines, with optimized coverage, to ensure reliable, maintainable, and production-safe code.

I also ensure that the code is properly logged and undergoes rigorous quality control.
  • French

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • IbanFirst
    Backend Development Engineer
    PRIVATE EQUITY
    September 2024 - December 2025 (1 year and 3 months)
    Paris, France
    - Developed production-grade backend services in Go (Golang) for a client portfolio management platform
    - Designed and implemented REST APIs for internal and external systems, ensuring reliability
    and scalability
    - Led the migration of legacy PHP components to Go, improving maintainability and reducing technical
    debt
    - Managed and optimized PostgreSQL databases, improving performance and data consistency
    - Built unit and integration test suites to improve system reliability and ensure safe CI/CD deployments
    - Containerized development environments using Docker, improving onboarding and reproducibility
    - Monitored application health using Grafana, improving observability and incident diagnosis
    - Collaborated in an Agile Scrum team, contributing to sprint planning, backlog refinement, and delivery
    PostgreSQL Grafana Docker Golang PHP
  • SOGECAP
    Security Development Engineer
    BANKING AND INSURANCE
    November 2018 - April 2024 (5 years and 5 months)
    Paris, France
    - Designed and maintained a RBAC system managing user permissions across enterprise applications
    - Migrated a legacy PHP-based user permissions system to Go and Vue.js, improving scalability and
    enabling delegated access management
    - Contributed to migrating from Oracle Database to PostgreSQL, ensuring data integrity and uninterrupted
    service continuity
    - Developed automation scripts for operational workflows and data balancing, improving system reliability
    - Implemented unit and integration testing, improving production stability
    - Managed user access lifecycle and permission workflows, ensuring secure and consistent operations
    - Worked in an Agile Scrum environment, contributing to sprint planning and delivery cycles
    Golang PostgreSQL Atlassian JIRA PHP Gitlab
  • Société Général GTS
    Technical Support Engineer
    BANKING AND INSURANCE
    November 2017 - November 2018 (1 year)
    Paris, France
    - Coordinated cross-site development between France and India, triaging and routing tickets and
    managing escalations for efficient resolution.
    - Managed production incidents and support tickets, ensuring effective issue resolution
    - Handled production deployment of fixes from offshore teams, ensuring safe release execution
    - Worked in an Agile environment, collaborating with cross-functional teams
    Atlassian JIRA Wordpress PHP MySQL support informatique

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Education

  • Master's in Web Development
    ESGI
    2017
    Master's in Web Development
  • Bachelor's Degree
    IRIS School
    2015
    Bachelor's Degree

Skill set

Categories