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Ahmed Ben AouichaAB

Ahmed Ben Aouicha

Expert Java - MongoDB Optimization

€500/day
Sfax, TN
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Ahmed

Are your MongoDB queries timing out or users complaining about slowness?

I am a Java/Spring Boot consultant specializing in performance optimization and the stabilization of documentary databases.

🔹 Guaranteed reduction in response time on your critical endpoints
🔹 Flash audit in 1 day: €1,000 flat fee (diagnosis + report with recommendations)
🔹 Proven experience: 95% gain on a business function (from +1s to 60ms)
🔹 L2/L3 Support: corrupted data correction, refactoring.

My clients appreciate: A business + technical approach. I don't deliver code, I deliver operational performance.

Available for short missions (audit).
  • French

    Native or bilingual

  • Arabic

    Native or bilingual

  • English

    Conversational

Remote only
Primarily works remotely

Experience

  • Lunar TC
    Senior Java Developer
    November 2022 - Today (3 years and 9 months)
    Tunisia
    At Lunar TC, my primary role was to ensure the high performance and reliability of backend services. I led the entire design and implementation of REST APIs for managing complex dynamic workflows, with a focus on the efficiency of asynchronous processing. My Master's expertise in Optimization was directly applied to advanced MongoDB Tuning. This included developing complex aggregations and strategic indexing to reduce latency on critical queries, thereby ensuring a smooth user experience. I also developed rich reporting modules (KPIs, filters, charts) and integrated a full-text search engine. I actively managed refactoring and data correction in production, ensuring schema consistency and updates. Collaboration with product and DevOps teams (Git, CI/CD, testing) was essential for continuous value delivery.
    MongoDB Agile method Scrum Java Spring boot
  • Station de services Shell
    Shell Manager
    ENERGY AND UTILITIES
    June 2017 - October 2022 (5 years and 4 months)
    Sfax, Tunisia
    This experience of over five years as a manager of a Shell station was a practical application laboratory for my skills in optimization and decision support, acquired during my research Master's degree. I was responsible for all operations and personnel management. Managing an operational entity involves constant process optimization (inventory management, logistics flow, service time reduction) to maximize customer satisfaction and profitability. My role as a Quality Expert (certified) allowed me to implement and maintain rigorous hygiene and safety standards, demonstrating operational rigor and attention to detail that are directly transferable to the quality of backend code. This complete business perspective allows me today, as a developer, to better understand the business stakes and priorities behind each technical specification.
    Group Management Inventory Management Microsoft Excel Communication Security
  • ADHEPACK
    Developer
    January 2017 - June 2017 (5 months)
    Sfax, Tunisia
    Following my Bachelor's degree in Computer Science Applied to Management and my Master's degree in Optimization, I began my IT career at ADHEPACK. This six-month experience allowed me to transition from academia to the professional world by directly applying my theoretical knowledge. My role consisted of developing and maintaining essential software solutions for the internal operations of the adhesive and label printing industry. Here, I acquired the fundamentals of professional development and the integration of IT systems into the company's value chain. This short but intensive mission was the first step in understanding the links between IT system performance and operational efficiency, a concept I later deepened through my quality management experience.
    Process Optimization Microsoft Excel performance-optimization ERP Security

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Education

  • Certificate in Internet and IT, Computer Science
    Faculty of Economic and Management Sciences Sfax
    2017
    Certificat internet et informatique, Informatique
  • Quality Expert
    Higher School of Engineering and Technology - ESPRIT
    2018
    Expert qualité

Skill set

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