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Data Engineer - Migration SAS vers Python - (X/F/H)

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À propos du poste

Vous rejoignez Cognizant en CDI au sein de la practice Data, sur un projet de migration d'environ 7 500 programmes SAS vers Python pour un grand compte du secteur Banque Finance.

Votre rôle est précis et critique : vous construisez et opérez les pipelines qui prouvent, sur données de production réelles, que les résultats Python sont strictement équivalents aux résultats SAS.

Au-delà de ce premier projet, vous avez vocation à évoluer sur d'autres missions data au sein du groupe, en fonction des opportunités et de votre développement.

Vos missions

En tant que Data Engineer, vous êtes en charge de :

  • Construire et opérer les pipelines de double-run SAS/Python sur données de production réelles
  • Implémenter les comparaisons DuckDB : EXCEPT, FULL OUTER JOIN, optimisations sur Parquet
  • Gérer les branches LakeFS dédiées aux tests et la configuration des accès
  • Développer les DAGs Airflow pour les pipelines de tests : SLA, retry, monitoring
  • Mettre en place les tests d'équivalence Python : pytest, assertions à tolérance configurable
  • Construire les dashboards de suivi des KPIs de non-régression sur Apache Superset

Profil recherché

Formation et expérience

  • Bac+5 en informatique, data, mathématiques appliquées ou domaine connexe (école d'ingénieur ou Master universitaire) ou expérience équivalente
  • Au moins 3 ans d'expérience en ingénierie data avec une pratique concrète des tests de données en production
  • Expérience de construction de pipelines de tests automatisés sur des environnements data complexes
  • Expérience avérée de traçabilité des anomalies dans des missions précédentes

Compétences techniques

  • DuckDB : SQL avancé, patterns EXCEPT / FULL OUTER JOIN, optimisation push-down sur Parquet
  • Apache Parquet et PyArrow : lecture, écriture, évolution de schéma, gestion des partitions
  • LakeFS : gestion de branches et de données de référence
  • Apache Airflow : construction de DAGs de tests multi-étapes, monitoring SLA, politiques de retry
  • Tests data Python : pytest ou équivalent, frameworks de comparaison, assertions à tolérance

Posture et mode de travail

  • Expérience avérée de traçabilité des anomalies dans des missions précédentes : documentation, suivi, résolution
  • Expérience de présentation de résultats techniques à des interlocuteur·rices projet dans des missions précédentes
  • Français et anglais courant

Ce qui pourra faire la différence

  • Connaissance d'Apache Superset pour la construction de dashboards depuis sources DuckDB ou Trino
  • Expérience d'intégration JIRA pour le suivi automatisé des anomalies
  • Connaissance d'AWS CloudWatch pour le monitoring des pipelines

Modalités de travail

Poste hybride basé à Paris, rythme de présence sur site à définir avec le client. Les modalités indiquées sont valables à la date de publication et peuvent évoluer selon les besoins du projet et du client.

Chez Cognizant, nous croyons que la diversité des parcours est une force. Votre profil ne coche pas toutes les cases ? Trois prérequis sont indispensables : DuckDB en production, Airflow, et une expérience concrète de tests d'équivalence de données.

About Cognizant: 
Cognizant (Nasdaq: CTSH) is an AI Builder and technology services provider, bridging the gap between AI investment and enterprise value by building full-stack AI solutions for our clients. Our deep industry, process and engineering expertise enables us to build an organization’s unique context into technology systems that amplify human potential, drive tangible outcomes and keep global enterprises ahead in a fast-changing world. See how at cognizant.ai or @cognizant.

Additional employment information
Compensation information is accurate as of the date of this posting. Cognizant reserves the right to modify this information at any time, subject to applicable law.

Language requirements vary depending on roles, but we ask that all candidates have basic English proficiency for company-wide communications purposes. For roles based in Quebec, professional English proficiency is required, as you’ll deliver services to and collaborate with stakeholders outside the province who may not speak French.

Cognizant is an equal opportunity employer. Your application and candidacy will not be considered based on race, color, sex, religion, creed, sexual orientation, gender identity, national origin, disability, genetic information, pregnancy, veteran status or any other characteristic protected by federal, provincial or local laws.

If you have a disability that requires reasonable accommodation to search for a job opening or submit an application, please email [email protected] with your request and contact information.

Benefits that help you thrive and grow

Our benefits program is built with you in mind—so you can enjoy a fulfilling, balanced and healthy life.

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Financial wellbeing

We regularly review market data to ensure compensation reflects the value you bring. Your benefits extend beyond pay and may include financial education, a pension plan with matching contributions, etc.

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Physical and mental health

We empower you to prioritize your wellbeing through paid time off, flexible working where possible, healthcare plans, counselling, our Mental Health Allyship program and more. 

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Your career, your way

With 350,000+ roles at Cognizant, you’ll have opportunities explore new technologies, industries and locations—and build the skills you need to grow your career.

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Real-world impact

Think about the biggest brands you rely on. Chances are, they rely on us to help strengthen their business. Here, you’ll turn bold ideas into solutions that improve lives everywhere.

Your path to Cognizant

Here’s what you can expect from our hiring process. Please keep in mind that it may vary by role and location. Explore our FAQs to learn more.

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Step 1: Apply to the right opportunity

Find an open role that matches your skills and career goals and show us why you’re the person for the job. Don’t see the right opportunity? Consider joining our Talent Community.

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Step 2: Connect with your recruiter

If one of our recruiters sees a fit, they’ll set up a short intro call to learn more about you and how your experiences and skills match the role.

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Step 3: Show off your skills

If you and our team would like to continue the process, you’ll interview with our hiring team. Some roles may also require technical assessments and/or client interviews.

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Step 4: Decision time

Our team will then review each candidates’ potential to succeed in the role. This step may take some time because we want to find the right fit for both you and us—but you can count on us to keep you updated.

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I’m supported by motivational leaders who empower me to grow in my career through learning programs, industry conferences and internal job moves. I’m proud of the career progression I’m making here.
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The moment I joined Cognizant, I felt like I belonged. I was heard and empowered to challenge ideas—and I still am to this day.
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Cognizant has one of the best learning ecosystems you can ask for. From sponsored certifications to training platforms to mentorship, we have all that we need to grow.
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