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Senior Python Systems Developer for Functional Testing

Mindrift

Contract|$50/hr - $50/hr|Remote|Remote — Lyon, Auvergne-Rhône-Alpes, France

Please submit your CV in English and specify your English proficiency level. Mindrift connects skilled professionals with project-based AI work from leading technology companies. Projects focus on testing, evaluating, and improving AI systems. This is a freelance, project-based position, not a permanent role. Role overview Mindrift seeks a Senior Python Syst…

Apr 24, 2026

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Internship - Implementation of Functional Tests on WebApps (H/F)

Withings

Internship|On-site|Issy-les-Moulineaux, Île-de-France, France

At Withings, we aim to empower individuals to take charge of their health.We are dedicated to designing beautiful and intuitive products that everyone can effortlessly incorporate into their daily lives; our range of connected scales, hybrid watches, blood pressure monitors, sleep trackers, and various devices are currently utilized by millions of users worldwide.Our mission is to facilitate the prevention, screening, and management of chronic diseases through innovative products and services, revolutionizing how we care for our health.Withings develops numerous web applications. Whether designed for business clients or end-users, all our applications must maintain perfect stability.As an intern within the Platform team, you will be involved in:Establishing a unit and functional testing system for each of our web applications. These tests will run with every commit and during beta releases to prevent issues during production deployment.Gaining an understanding of the various web applications to create tests that verify critical functionalities.Assisting the Webapp team with other projects.Being a proactive contributor to continually improve our processes.Deliverables: Web interfaces.

Oct 13, 2025

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Functional Test Engineer H/F

inetum2

Full-time|On-site|MONTPELLIER

inetum2 is looking for a Functional Test Engineer (H/F) in Montpellier. This position centers on verifying the functionality and performance of software products through detailed testing and validation. Role overview The Functional Test Engineer works closely with development teams to identify issues early and contribute to high-quality deliverables. Collaboration is key, as the role supports both technical teams and client satisfaction by ensuring products meet requirements and perform as intended. What you will do Develop and execute comprehensive testing strategies for software products Validate product functionality and performance Identify and document potential issues during testing phases Work with developers to resolve defects and improve product quality Requirements Experience in functional testing of software Strong analytical and problem-solving skills Ability to collaborate effectively with technical teams

Apr 29, 2026

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QA Engineer - Functional Testing

Shift Technology

Full-time|On-site|France - Paris

About the Role Shift Technology is looking for a QA Engineer focused on functional testing to help maintain high standards for our software products. Based in Paris, this role centers on making sure our solutions work as intended and deliver a strong experience for users. What You Will Do Work with teams across disciplines to plan and refine testing approaches Design and document test cases that cover product requirements Run manual and automated tests to uncover defects and verify fixes Share feedback to help improve product quality and usability Location This position is based in Paris, France.

Apr 15, 2026

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Senior Python Developer (H/F)

Meritis

Full-time|On-site|Sophia Antipolis

Role Overview Meritis is looking for a Senior Python Developer (H/F) to join the team in Sophia Antipolis. This role focuses on building and maintaining software with Python at its core. Main Responsibilities Design, develop, and maintain efficient, reusable, and reliable Python code Work with cross-functional teams to define, design, and deliver new features Contribute to code quality and performance throughout the development process About the Team Meritis operates in Sophia Antipolis, a well-known technology center. The team values collaboration and aims to deliver solid software solutions.

Apr 15, 2026

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Senior Core Systems Developer

Jobgether

Full-time|On-site|France

Role overview Jobgether seeks a Senior Core Systems Developer located in France. This position centers on building and maintaining the essential systems that power the company’s daily operations. The team values developers with a strong background in software development who can influence and strengthen Jobgether’s technical foundation. What you will do Develop and maintain core systems that are vital to Jobgether’s business functions Collaborate with teams throughout the company to deliver dependable software solutions Take part in designing and implementing new features and ongoing improvements Collaboration This role involves working regularly with cross-functional teams to make sure software solutions meet both client requirements and business objectives.

Apr 28, 2026

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Senior Python Developer - Paris - H/F

iliad-free

Full-time|On-site|Paris

We are seeking a talented and experienced Senior Python Developer to join our dynamic team at iliad-free in Paris. This role offers an exciting opportunity to work on innovative projects and contribute to the development of cutting-edge technology solutions.The ideal candidate will have a strong background in Python programming, experience with web frameworks, and a passion for delivering high-quality software. You will collaborate with cross-functional teams to design, develop, and maintain software applications that meet the needs of our users.

Mar 3, 2026

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Test Development Engineer

The Exploration Company

Full-time|On-site|Bordeaux, France

Join us at The Exploration Company as we innovate the future of space travel with Nyx, our modular and reusable orbital vehicle designed for in-orbit refueling and versatile cargo transportation, with future potential for human missions.We are also pioneering advanced propulsion systems to empower our upcoming vehicles and missions. As a skilled Test Development Engineer, you will play a vital role in creating test facilities for our next-generation propulsion systems.Key Responsibilities:In your dynamic role as a Test Development Engineer, your responsibilities will include:Synthesizing test bench requirements based on user and operator needs, and developing necessary verification methods and tests.Designing P&IDs for test facilities aligned with test bench specifications, selecting components, and performing CAD design of ground support equipment with minimal supervision.Conducting hazard assessments (FMEA and HAZOPs) of test facility designs to identify required design modifications.Performing technical trade-offs to choose the most suitable hardware, software, and equipment for various testing environments.Leading risk assessment analyses for upcoming tests and developing mitigation strategies to ensure personnel and equipment safety; creating clear procedures and guidelines to enhance company processes.Developing and maintaining test procedures, sequences, scripts, and configuration files necessary for test facilities, particularly for the entry-into-service and commissioning phases.Selecting control and data acquisition systems in accordance with test requirements and supporting commissioning activities to ensure their proper functionality.Overseeing the entire lifecycle of test facility development, including design, reviews, manufacturing, installation, commissioning, test operations, ongoing upgrades, and maintenance.Collaborating with procurement, AIT, and design teams during the development of test facilities to balance technical solutions, cost, and lead time.Working alongside colleagues to troubleshoot test anomalies and address complex engineering challenges.Communicating findings to team members and actively participating in design reviews and other collaborative efforts.

Feb 20, 2026

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Senior Python Developer / DevOps Engineer (H/F)

Meritis

Full-time|On-site|Paris

Join Meritis as a Senior Python Developer / DevOps Engineer and become a key player in our dynamic team. We are looking for an experienced professional who is passionate about software development and cloud technologies. In this role, you will design, develop, and maintain robust Python applications while leveraging DevOps practices to enhance our deployment processes.

Mar 6, 2026

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Senior Python/Django Developer - Free TV - F/H

iliad-free

Full-time|On-site|Paris

Join our dynamic team at iliad-free as a Senior Python/Django Developer. In this pivotal role, you will be responsible for designing, developing, and maintaining high-quality web applications that enhance user experience in the Free TV sector. You will collaborate with cross-functional teams to deliver innovative solutions that address real-world challenges.

Mar 20, 2026

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Senior Functional Architect

Altersolutions

Full-time|On-site|Paris

Join Altersolutions as a Senior Functional Architect, where you will be pivotal in driving innovative solutions and enhancing our clients' operational capabilities. Your expertise will guide our teams in delivering effective architectural solutions, ensuring alignment with industry standards and best practices.

Oct 4, 2022

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Functional Tester (H/F)

altersolutions

Full-time|Hybrid|Paris

Join our Software Quality Assurance Division as an integral part of a team focused on validating functionalities and promoting continuous improvement in our products. We are in search of a skilled Functional Tester with approximately 2 years of experience to strengthen our team located in Paris.As a Functional Tester, your responsibilities will include:Validating the functionalities of applications based on User Stories.Participating in Agile rituals (Scrum): refinement, sprint planning, daily stand-ups, and retrospectives.Writing and executing test cases to ensure the quality of deliverables.Collaborating with development teams to identify and rectify issues.Documenting test results and tracking corrections.Contributing to the enhancement of testing processes and quality best practices.Working closely with Product Owners and developers.

Oct 10, 2025

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Senior Python Developer | Software Engineering Practice at MARGO

MARGO Group

Full-time|On-site|Paris

About UsAt MARGO, our consultants focus on what truly matters: engaging in complex projects that blend intellectual challenge with real business impact. We support the most prominent players in finance, industry, and technology by designing and developing high-performance software solutions, including distributed architectures, cloud platforms, real-time systems, and large-scale critical applications.Why Join the Software Engineering Practice?You will be part of a team led by Paul Blois, who has been the Practice Manager at MARGO for five years. Working alongside him means benefiting from an in-depth understanding of the company, receiving close mentorship in your career development, and contributing to demanding IT projects with significant impact for our clients.Your ResponsibilitiesYou will join a team of 12 professionals tasked with translating complex financial mechanisms into an elegant and resilient software architecture. At the heart of a leading energy company's market activities, you will design the contract modeling engine that manages the group’s risk exposure.As a Senior Python Developer, your challenges will include:- Architecture & Design: Developing and evolving APIs and microservices capable of modeling rich and varied contractual life cycles.- Engineering Excellence: Ensuring code quality and maintainability (Clean Code, extensive unit and integration testing) in an environment where even a minor miscalculation can have direct financial repercussions.- Domain Modeling: Collaborating with business experts to convert complex management rules (gas purchases, P&L tracking, European regulatory constraints) into high-performing data models.- Performance & Scalability: Optimizing services for the aggregation of massive data volumes necessary for real-time risk management tools.

Feb 5, 2026

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Python Backend Developer

Octopus Energy

Full-time|On-site|Paris (FR)

Join Octopus Energy, where we challenge the status quo in the energy sector by making it greener, more affordable, and accessible to everyone. Originally launched in the UK, our innovative approach has expanded to France since 2022! We combine cutting-edge technology with a team of dedicated professionals who are passionate about our customers and the transition to renewable energy. In just three years, we have grown to become the fifth-largest energy supplier in France! Our mission? To provide all French citizens with cheaper and greener energy, along with practical solutions to accelerate the ecological transition. Currently, we are developing the next generation of products that empower the shift towards sustainable energy. Whether it's facilitating the transition to solar energy and electric vehicles, launching smart pricing, or scaling renewable energy production, we tackle some of the most complex challenges in the energy field! We do this with speed, creativity, and a singular focus on customer satisfaction. As a member of the Octopus Tech team, you will have genuine autonomy, a diverse range of projects to work on, and the opportunity to create products that make a significant impact on people's lives, helping them reduce their bills, live more sustainably, and enjoy truly engaging experiences. You will collaborate closely with our French teams in marketing, operations, and data, as well as with technical teams from other countries in the group . Above all, you will see the real-world impact of your work on our customers quickly. Within the OE Tech France team, you're not just coding; you're building the technological engine that makes green energy simple and intuitive for everyone in France. You will join a small, agile, and innovative team where seniority and collaboration are paramount:- A strong core: You will work daily with 1 Product Manager, 4 Frontend Developers, and 3 Backend Developers. The Backend team is currently composed mainly of senior profiles, allowing you to thrive in a demanding and stimulating technical environment.- Synergy with Data : You will work closely with data experts to leverage insights that drive our innovations.

Apr 22, 2025

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Control Systems Test Engineer H/F

Assystem

Full-time|On-site|Lyon

Join Assystem as a Control Systems Test Engineer and play a pivotal role in ensuring the reliability and performance of advanced control systems. You will be responsible for designing, executing, and analyzing tests that validate the functionality and robustness of these systems. This position offers a unique opportunity to work alongside industry experts and contribute to innovative projects in the field.

Feb 13, 2026

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Experienced Python Developer

SFEIR

Full-time|On-site|Lille

Are you a vibe coder with a passion for development, and do you believe AI will redefine your profession?Welcome to SFEIR. What We Are Looking ForYou are unafraid to:- Design large-scale distributed systems using Python,- Lead the overhaul of complex Cloud infrastructures,- Build robust and efficient data pipelines,- Mentor junior developers and share your expertise,- Migrate technologies (Flask → FastAPI, protobuf → Pydantic) without disrupting production,- Propose architectural improvements through Proof of Concepts,You aim to be the technical reference that drives projects forward, not just a task executor. Projects You Could Enjoy- Develop scheduling products around BigQuery and Dataflow,- Create complex REST APIs using FastAPI in distributed architectures,- Automate content translation with Google Cloud Generative AI,- Build Jupyter Notebooks for data ingestion and processing,- Establish documentation bases and ensure team onboarding,- Validate ML results with the Natural Language API and generate reports.In short, Python on impactful projects that matter to the business. Why Join Us?Ready to elevate your expertise? At SFEIR, you don’t have to choose between technical excellence and a collaborative environment; both coexist here.You will join a community of experts where your skills define your trajectory, not your position. This is what we call a “Skill-Based Organization.”

Sep 12, 2024

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Senior Python/Terraform Developer - AI LLM (F/H)

Talan

Full-time|On-site|Nantes

Join Talan, a leader in innovation and technology, as a Senior Python/Terraform Developer specializing in AI LLM. In this role, you will leverage your expertise in Python and Terraform to develop advanced AI solutions that drive our projects forward. You will work closely with cross-functional teams to design, implement, and optimize AI applications, ensuring they meet the highest standards of performance and scalability.

Apr 10, 2026

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System Test Engineer (H/F) - Apprenticeship

aumovio

Internship|On-site|Toulouse

Join our innovative team at aumovio as a System Test Engineer in a dynamic apprenticeship role. You will have the opportunity to work on cutting-edge technology, testing systems to ensure optimal performance and reliability. This position is ideal for individuals eager to learn and grow in a fast-paced environment.

Apr 3, 2026

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Senior Functional Designer for Audit Software

Mazars

Full-time|On-site|Levallois-Perret

Role overview The Senior Functional Designer for Audit Software at Mazars focuses on shaping the evolution of audit solutions in the Levallois-Perret office. This position plays a key part in improving how audit software meets client needs, with an emphasis on usability and effectiveness. Collaboration with both technical and business teams is central to the role. Main responsibilities Gather and analyze requirements from stakeholders to guide software development for audit tools. Create clear and actionable functional specifications for audit applications. Work alongside cross-functional teams to ensure software features support business goals and client expectations. Apply expertise in functional design to help build applications that are intuitive and user-friendly. Impact This position supports Mazars' clients by strengthening the technology that underpins their auditing processes. The work ensures audit software continues to meet practical needs as client requirements evolve.

Apr 23, 2026

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Principal Engineer – Test Systems Software

The Exploration Company

Full-time|On-site|Bordeaux, France

Role overview The Principal Engineer – Test Systems Software at The Exploration Company in Bordeaux, France leads the development and testing of software systems vital to exploration missions. This senior position focuses on building, maintaining, and improving software solutions that ensure the reliability and performance of mission-critical test systems. What you will do Design and implement software for test systems supporting exploration technologies Improve existing software to boost efficiency and reliability Collaborate with cross-functional teams to align software with mission objectives Mentor junior engineers and share technical expertise Encourage and uphold best practices in software testing across the team Collaboration and impact This role involves working closely with engineers from multiple disciplines. The Principal Engineer shapes the direction of exploration technology and ensures test systems consistently meet high standards for quality and performance.

Apr 21, 2026

Senior Python Developer / DevOps Engineer (H/F)

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