Senior Python Developer – Telecom Network Tools (F/H)

Network Solutions Factory; Lyon; Hybrid; EUR 85,000 - 120,000; Full time

Benefits offered by this job

Remote work up to 70 days/year

Meal vouchers

Health insurance

Transport allowance

Salary growth and annual bonus

Job summary

NetSF is seeking a Senior Python Developer to design, develop and maintain internal tools for telecom network management. You will ensure reliability, scalability and alignment with internal customers. You will collaborate with Product Owner and Delivery Manager, mentor juniors and contribute to architectural decisions.

You will join a close-knit team practicing agile ceremonies, code reviews and knowledge sharing, with opportunities to influence stack choices and engineering standards.

Qualifications

• 5+ years in software development, fullstack (React, Javascript, HTMx) with strong Python 3 and Django backend.
• Experience in telecom, OSS or data-oriented environments.
• Solid experience with relational databases (PostgreSQL, MySQL).
• Hands-on experience with Docker, Kubernetes, GitLab CI, and Linux (Debian) production environments.
• APIs design, building and integration with internal and third-party systems.
• Experience in agile teams with multiple parallel projects and changing priorities.
• Ability to mentor and coach junior developers.
• Autonomy, proactivity and solution-oriented approach.
• Fluent English (mandatory) and professional French.

Responsibilities

• Design, develop and maintain software applications supporting the technical management of our telecom networks.
• Deliver reliable, secure and well-tested solutions that meet internal customers' needs.
• Work on several projects in parallel with a Product Owner and a Delivery Manager.
• Collaborate daily with the development team through agile ceremonies, code reviews and knowledge sharing.
• Mentor and coach junior developers and contribute to architectural decisions.

Job description

As Senior Python Developer, you will design, develop and maintain the internal tools used for the technical management of our telecom networks, ensuring they are reliable, scalable and aligned with the needs of our internal customers.

Working closely with the Product Owner, the Delivery Manager and a team of around ten developers, you will contribute to several projects in parallel within an agile framework. Teamwork is at the core of how we deliver: code reviews, pair programming and shared technical decisions are part of everyday life.

As an experienced developer, you will also act as a mentor for our junior developers, supporting their growth and helping raise engineering standards across the team.

You will be a key contributor to technical choices, with the autonomy and sense of ownership expected at this level of experience.

QUALIFICATIONS

• 5+ years of experience in software development, fullstack (React, Javascript, HTMx) and strong backend expertise in Python 3 and Django, ideally in telecom, OSS or data-oriented environments.
• Solid experience with relational databases (PostgreSQL, MySQL).
• Hands-on experience with Docker, Kubernetes, GitLab CI, and with Linux (Debian) production environments.
• Proven experience designing, building and integrating APIs with internal and third-party systems.
• Experience working in agile teams (Product Owner, Delivery Manager), with the ability to manage several projects in parallel and adapt to changing priorities.
• Ability to mentor and coach junior developers.
• Autonomy, proactivity and a solution-oriented approach, with the ability to escape when required.
• Ability to think creatively and to question existing ways of working.
• Confirmed knowledge and practical use of agentic coding tools in your daily development workflow.
• Fluent English (mandatory) and professional French.

APPRECIATED SKILLS

• Familiarity with Jira and Confluence.
• Experience with data technologies and orchestration tools (Trino, Apache Iceberg, Apache Airflow, Celery).
• Knowledge of visualization and monitoring tools (Grafana, Superset).
• Knowledge of QA practices, or proven experience in setting up automated testing.
• Proven experience in application security: secure design and coding practices.
• Knowledge of radio networks, telecom or OSS tools and network management concepts.
• Ability to use and test other frameworks or programming languages when relevant, for specific features or POC.
• Spanish (spoken and understood) is a plus.

OUR STACK

• Python 3 / Django
• Front: Javascript, React, HTMx
• DevOps & System: Linux Debian, GitLab CI/CD, Flux/ArgoCD, Kubernetes
• Project: Jira, Confluence
• Data: Trino, Apache Iceberg, PostgreSQL / MySQL, Opensearch
• Orchestration: Apache Airflow, Celery
• Visualization: Grafana, Superset

MISSIONS

Software Development & Delivery

• Design, develop and maintain software applications supporting the technical management of our telecom networks.
• Deliver reliable, secure and well-tested solutions that meet the needs of our internal customers.

Teamwork & Agile Delivery

• Work on several projects in parallel, in coordination with the Product Owner and the Delivery Manager.
• Collaborate daily with the development team through agile ceremonies, code reviews and knowledge sharing.

Mentoring & Technical Leadership

• Mentor and coach junior developers.
• Contribute to architecture and technical decisions, and to the continuous improvement of our practices and stack.

WORKING AT NETSF

• Permanent position (French CDI)
• An attractive salary based on your profile and experience
• 25 days of paid vacation and 6 extra days off (French RTT) per year
• Remote work: up to 70 days per year (maximum 3 days in a given week), with a compensatory allowance
• And many other benefits:
• Profit-sharing and employee savings plan
• Annual vacation bonus
• Meal vouchers subsidized at 59.89% by NetSF, up to €11
• Family health insurance, subsidized at 75% by NetSF
• Provision of additional health insurance
• A friendly work atmosphere: monthly breakfast, internal newsletter, fruit basket, free coffee and tea, etc.
• Transport allowance and sustainable mobility package
• International work environment

OUR COMMITMENT

NetSF is committed to professional equality and diversity. All our positions are open, on equal skills, to everyone without distinction, including people with disabilities, for whom adjustments can be considered.