Freelancer profile translated to English.

Description

I design and evolve large-scale SaaS platforms in production. I intervene when systems become complex to evolve (scalability, technical debt, multiple flows) and start losing readability, reliability, or control.

Lead Backend Engineer / Architect with over 20 years of experience, I combine technical expertise and hands-on leadership to:

Stabilize and evolve critical production platforms
Simplify overly complex architectures
Improve maintainability without slowing down delivery
Align teams around clear and pragmatic technical decisions

I support teams in the progressive improvement of systems, favoring pragmatic evolution over radical transformation.

👉 Goal: Regain control of systems, secure delivery, and build robust, manageable, and sustainable platforms over time.

Today, AI introduces new capabilities but also new sources of complexity. The challenge is no longer to generate, but to integrate these components into existing systems without degrading their readability, reliability, or maintainability. I intervene when these experiments need to become real systems: integrated, controlled, and long-term operable systems.

Industry field of expertise

Languages

French
Native or bilingual
English
Native or bilingual

Workplace preferences

Can work on-site

Paris (up to 50km)

Creazybox
Software Architect
E-COMMERCE
August 2025 - Today (10 months)
Paris, France
Design and development of an AI-assisted visual customization SaaS platform, combining image generation, graphic editing, and e-commerce order orchestration.

Personal project developed in parallel with freelance assignments, serving as a field for experimentation and continuous improvement in software architecture, production operations, and sustainable system design.

Responsibilities and achievements:
Design of the complete SaaS platform's application and backend architecture
Integration of AI image generation into the user workflow (prompt → iteration → validation)
Implementation of critical integrations: payments (Stripe, Paypal), print-on-demand fulfillment, notifications, and order tracking
Platform industrialization: authentication, security, CI/CD, monitoring, and observability
Operation of a system in real-world conditions, from ideation to production deployment
💻 Next.js React TypeScript Node.js PostgreSQL Redis BullMQ TailwindCSS Generative AI APIs
SAAS Lead Developer
Datanumia
Lead Engineer (hands-on) — Energy SaaS Platform
ENERGY AND UTILITIES
February 2022 - April 2026 (4 years and 2 months)
Courbevoie, France
🌿 Contribution to the design and evolution of an energy SaaS platform for collecting, analyzing, and optimizing energy consumption and carbon footprint. 🌎

Multi-tenant platform processing 1M+ consumption events per day.

Long-term mission (4 years) in a demanding industrial product context, with continuous and sustainable collaboration.

Responsibilities
Design and evolution of the microservices architecture
Technical scoping of new features
Mentoring and coaching developers
Improvement of engineering practices (TDD, hexagonal architecture, code standards)
Reduction of technical debt and improvement of maintainability
Results
Scalable microservices platform (15+ services)
Team upskilling on Scala / Spark / Kafka
Improvement of system quality and operability
💻 java 8/17/21 angular scala spring-cloud springboot spark mysql cassandra redis kafka rabbitmq
openshift kubernetes docker aws prometheus grafana agile scrum safe cleancode hexagonal
architecture
Java 21 Hexagonal Architecture Cloud AWS Apache Kafka Cassandra
Photobox
Development Manager / Lead Architect
E-COMMERCE
February 2016 - December 2021 (5 years and 11 months)
Paris Area, France
Transformation of a distributed e-commerce platform operating across Europe (FR/UK/DE/ES), in a context of high growth and load peaks.

Alignment of architecture, teams, and engineering practices to support scalability and manage system evolution over time.

Responsible for a development team and the production system architecture for the group's e-commerce platform.

Direct collaboration with the CTO on technical vision and group architecture evolution.

Responsibilities
Definition of the production system's technical architecture
Supervision and development of a team of developers
Alignment of international teams (FR / UK / DE / ES)
Driving technical standards and engineering practices
Coordination with product teams and group stakeholders
Results
Complete migration to a cloud architecture with auto-scaling
Platform capable of handling 100,000 orders during peak times
Product catalog became the group's reference
Rapid integration of new brands and partners
💻 Scrum Java Springboot Git Microservices AWS SNS/SQS S3 EC2 REST AngularJS Jenkins
Ansible Docker Kubernetes
Scrum Java Spring boot Microservices AWS

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Professional Master in Software Engineering
Université de Bretagne Occidentale
2006
Analyse/Conception, Gestion de projet, Ergonomie/IHM, Intergiciels, Ingénierie des connaissances. Rang 1/21

Sun Certified Java Programmer
Sun Microsystems
2007
Java
Management 3.0
Rupture(21)
2017
Coaching Agility Team Management Servant Leadership

Patrick Elard

Lead Java Backend Architect | Microservices & SaaS

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