Skip to content
CV Rocket
Get started
How it worksThe enginePricingBlogContactSign in

Open nowPosted 13 days ago

Python Back-End Software Engineer Senior

Cronos Europa50 open roles

Where
Brussels, Belgium
Get the CV for this job

From $25 per CV, paid once. No subscription.

Your applicationOpen nowPython Back-End Software Engineer SeniorCronos Europa · Brussels, Belgium

  1. YouYes, apply to this one.

  2. CV RocketCV written for this posting.

  3. 25 readersRecruiter, hiring manager, skeptic. Round after round.

  4. CV RocketApplied on Cronos Europa's own form.

The reply lands in your private mailbox

3×more interviews than doing it yourself with ChatGPT.

The clock on this job

Early applications get read.

12.4% of postings close within 7 days. Measured by our own scanner across the market. Cronos Europa postings stay open a median of 3 days.

Share of postings closed within
  1. 2.1%1 day
  2. 4.5%3 days
  3. 12.4%7 days
  4. 20.0%14 days
  5. 35.5%30 days
  6. 58.6%60 days
This job: posted 13 days ago

Cronos Europa median: 3 days open

The posting

About Cronos Europa

Cronos Europa is a leading IT and digital transformation partner dedicated exclusively to European Institutions and agencies, delivering mission-critical solutions that shape Europe's digital future. As part of the Cronos Group, one of the most innovative and fastest-growing tech ecosystems in Europe, we benefit from a vast pool of expertise and cutting-edge capabilities. With over 1,000 specialists across Belgium, Luxembourg, and the Netherlands, we combine deep institutional knowledge with strong engineering excellence to support long-term, high-impact EU programmes requiring reliability, scalability, and innovation.

About the job

We are looking for a Python Back-End Software Engineer to design, develop, secure and maintain robust server-side components supporting mission-critical web applications. The role focuses on building scalable back-end services, integrating systems through APIs, optimising databases and supporting reliable delivery in cloud-based environments.

Responsibilities

  • Architect server-side components and services that form the backbone of web applications, employing best practices in Python programming.
  • Develop and maintain RESTful APIs to facilitate seamless communication between front-end and back-end systems.
  • Design, implement and optimise database schemas and queries to ensure efficient data storage and retrieval processes.
  • Manage database security measures to protect sensitive information, ensuring compliance with data protection standards.
  • Enhance application performance by identifying bottlenecks and optimising server-side code and database queries.
  • Implement scalable architectures to handle increased user load and data volume, leveraging cloud services and containerisation.
  • Conduct regular code reviews and use vulnerability scanning tools to identify and address potential security issues.
  • Implement security protocols and standards to safeguard applications against threats and ensure data privacy.
  • Collaborate closely with front-end developers, UI/UX designers, product managers and other stakeholders to deliver quality web application solutions.
  • Help translate business requirements into technical specifications and adjust implementations based on feedback.
  • Set up and maintain CI/CD pipelines to automate testing and deployments, ensuring consistent and rapid delivery of applications.
  • Participate in deploying applications in cloud environments, using infrastructure-as-code and configuration management tools.
  • Actively engage in debugging and resolving issues raised during testing or reported in production.
  • Write technical documentation.

Specific expertise

  • EQF 6 with a focus on Computer Science.
  • Proficiency in Python and experience with web frameworks such as Django, Flask or FastAPI.
  • Experience with code linters and formatters such as pylint, black or flake8.
  • Experience with AI-powered code assistants such as Amazon Kiro or GitHub Copilot.
  • Strong understanding of RESTful design and implementation.
  • Solid experience with relational databases such as Oracle or PostgreSQL and non-relational databases such as Elasticsearch or MongoDB.
  • Excellent knowledge of ORM, schema design and efficient queries.
  • Expertise in containerisation tools such as Docker or Podman and orchestration using Kubernetes.
  • Knowledge of vulnerability scanning tools, secure coding practices and standards, including authentication, authorisation and encryption.
  • Knowledge of code versioning tools such as Git or SVN.
  • Knowledge of DevSecOps tools such as Jenkins, GitLab CI or GitHub Actions.
  • Familiarity with configuration management tools such as Ansible.
  • Experience with VM management and Linux.
  • Good knowledge of the European Commission grant management ecosystem, including eGrants, would be an asset.

Skills and competencies

  • Ability to apply rigour and consistency in back-end development practices.
  • Ability to work in a multicultural environment.
  • Ability to participate in multilingual meetings.
  • Ability to understand, speak and write English; French is considered an asset.
  • Talent for building relationships and adapting communication to the audience.
  • Ability to work in a team as well as autonomously.
  • Results-oriented mindset focused on delivery.

If you wish to integrate a dynamic structure on a human scale while working with the latest technologies, don't wait anymore and join Cronos!

From $25, paid onceGet the CV for this job

What happens when you press

One press. We do the rest.

  1. A CV for this posting

    Written against Cronos Europa's own wording, from every piece of relevant proof in your profile.

  2. 25 readers review it

    Recruiter, hiring manager, skeptic and more read every draft, round after round. You get the best round.

    The review screen in CV Rocket: how each CV was read, round by round.

  3. We apply on Cronos Europa's form

    Our application engine gets through the hardest forms there are. Where a question needs you, AI suggests the best answer. Don't want us applying from our IP addresses? Use our Chrome extension: we apply straight from your own browser.

    An application in CV Rocket: every answer filled in on the employer's form.

  4. Every reply, sorted

    Cronos Europa's answer lands in your private mailbox, and we classify it on arrival: interview, question, rejection.

    The CV Rocket inbox: each employer reply classified as an interview, an action or a rejection.

  5. Reply with AI

    AI helps you write the email, checks it and sends it. We show you whether the recruiter read it.

  6. The interview in your calendar

    Full integration with your calendar. The invitation goes straight in.

    An interview invitation in the CV Rocket inbox, added to the candidate's calendar.
Get the CV for this job

From $25 per CV, paid once. No subscription.

Why it works

3×

more interviews than doing it yourself with ChatGPT.

ChatGPT writes a CV and never learns what happened to it. We see every reply. For each CV we know:

  • How it was written, and how the review scored it
  • When we applied, and how long after the posting went up
  • Which posting, which company, which city
  • Who got the interview, and who heard nothing

That is how we know which CVs get called.

Get the CV for this job

From $25 per CV, paid once. No subscription.

The numbers game

More applications. More interviews.

Every application goes out with its own CV, written for that posting and paid once. Send enough of them and the law of large numbers finds you the job.

Get the CV for this job
By hand5–10
With CV Rocket100
applications a day

Nearby

Live postings like this one

Same employer first, then the same role elsewhere.

Before you press

Straight answers

Get the CV for this job

From $25 per CV, paid once. No subscription.

What if my background isn't good enough?

We make the most of the background you have. The CV uses every piece of relevant proof your profile holds, and one of the 25 readers reads your whole profile and flags what the CV left out.

Do you really apply for me?

Yes, on the employer's own form, the hardest ones included. Where a question needs you, you answer it right there and AI suggests the best answer. Don't want us applying from our IP addresses? Use our Chrome extension: we apply straight from your own browser.

Is it a subscription?

No. You pay once per CV, from $25. Every application goes out with its own CV, written for that posting.

One job. One CV.
Paid once.

Pick the posting you want. We write for it, apply for you and catch the reply.

Get the CV for this job

From $25 per CV, paid once. No subscription.