Your job:In this position, you will join the Python Infrastructure and Performance (PIP) team, which currently consists of two members and the team lead. The team’s vision is a codebase that we would be proud to open-source. The team cares a lot about doing things properly and sets high standards in their work in terms of maintainability, performance, and security. Taking a broader view, this team is responsible for improving the codebase on a systemic level, writing proposals for architectural changes, and facilitating discussions with other development teams (the primary customers).
Your challenges:* Continuously improve the maintainability and quality of our Python codebase.
+ Example: modeling all the requests and responses in our HTTP endpoints
- Remove technical debt by modernizing legacy code, upgrading dependencies and carrying out large-scale migrations and refactoring.
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Example: migrating Pydantic from v1 to v2
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Monitor and improve the performance of our API endpoints and of our background jobs.
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Example: rewriting performance-critical code in Rust
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Improve the performance and correctness of our test suite.
- Work on security improvements together with other security specialists in the company.
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Examples: Single Sign-On, security improvements to authentication tokens
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Collaborate with other developers to learn about what problems and opportunities they see.
- Building new features will not be the primary focus of this team.
We use the following technologies and tools:
- Languages: Python (3.13), PostgreSQL
- Libraries: pydantic, sqlalchemy, typing, requests, logging, flask, fastapi, pytest
- Tools: mypy, ruff, Sentry, Prometheus, Grafana, Loki
Who are you?You are committed to high engineering standards; you care about making things robust and easy to maintain. Making other developers' lives easier makes you happy.
You don't just want things to work: you also want to understand how and why they work. You love diving deeply into technical details and finding creative solutions to complex problems. You can be pragmatic, but also truly enjoy doing things the right way.
You like working in a team and taking ownership of your projects. You can communicate and coordinate with colleagues across teams effectively.
You also:
- Have excellent backend development skills in Python or similar languages.
- Have significant experience working on larger production codebases.
- Are experienced with web technologies.
- Have experience with typing (mypy) in Python.
- Have a good working knowledge of Linux, git, and the command line.
- Live in The Netherlands or are willing to relocate, and are in possession of a valid work permit (if you’re a non-EU citizen).
Nice to have:
- Are comfortable with SQL and relational databases, ideally PostgreSQL.
- Experience in optimizing performance of database queries and application code.
- Having worked with distributed systems before.
Important note: we understand that studies show women may only apply for roles when they feel they meet 100% of the requirements, therefore, we strongly encourage you to apply even if you don't check every box, as we are looking for passionate individuals with potential and a willingness to grow.
Who are we?Channable was founded in 2014 in the heart of Utrecht. We are now a strong team of 320+ diverse individuals, and more than 40+ nationalities.
Joining Channable means you’re looking for a bit more than just a job. Diverse as we are, we all share our love for growth, to help, to take ownership, and create an awesome journey together. Feel free to take a further look at who we are here and on our Instagram or Linkedin! Wanna get to know us even more? Give our Culture Playbook a read.
What do we do?Channable is a fast-growing B2B SaaS platform that offers a fully integrated way to market your products online. We empower marketers and online businesses to manage, scale, and optimize their marketing
Want to read more about our development adventures? Then visit our inspiring tech blog: https://tech.channable.com/
And if this makes you enthusiastic, you can also take a look at some of our open-source work at https://github.com/channable to get a feeling of how we work together and what our code looks like.
What do we offer?
- * Gross monthly salary ranging from € 4.300 to € 6,000 based on a 40-hour work week. This salary range reflects our career framework. Your final role level will be determined throughout the recruitment process, based on alignment with this framework.
- 8% holiday allowance - 8% of your yearly salary, which is paid together with your May salary.
- Stock Appreciation Rights: you can financially profit from Channable’s success.
- Company-wide performance bonus, up to 10% of your annual salary, determined yearly by our founders based on financial planning and targets
- Annual L&D budget of €1000 to spend on anything you want to learn. You can take full advantage of this to grow professionally.
- Saving for old age - we have a savings scheme for old age, which can accrue up to 5% of your monthly salary, or you can get an additional +2.5% to your monthly base salary.
- 26 vacation days + 2 reload days based on 40 hours.
- Fresh (hot!) meals Monday to Thursday, catering to all dietary needs - including vegan, vegetarian, and gluten-free - to keep our team fueled and inspired! On Fridays, we switch it up by ordering in tasty sandwiches and salads.
- Traveling to our office? No problem, we got you covered (NS Business Card, or €0,25 per km if you decide to use a different means of transport).
- To work in a beautiful, historic, and charming office in the heart of Utrecht & with a flexible hybrid working policy of minimum 2 days in the office. We will provide home office supplies and an additional home office budget.
- Having flexible working hours means starting your day between 8.00–10.00 am.
- You have free & anonymous access to the OpenUp platform and psychologists for mental and physical support. This free service is also available to your family members.
- Remote working for 3 weeks per year, and an additional 3 weeks, if you live as an expat in the Netherlands!
- Are you going to become a parent? We think it is important that you spend time with your newborn. Enjoy 5 weeks of 100% paid partner leave.
- We want you to feel good - please feel free to use our discounted Urban Sport Club subscription.
- Channaweekend - Every year we go for a long weekend with all our colleagues from all over the world.
- Channaweek - We believe in bringing people together. That’s why we organize global events like Channaweek where our entire international team gathers in Utrecht to connect and learn from one another.
- Additional working conditions like massages, an in-office bar (Channabar), events, personal training sessions at our Channagym, and many more!
How can you introduce yourself to us?Are you interested? Please apply by clicking on the "apply now" button below. Please send your application in English. If it's a match, Ioana (Tech Talent Acquisition Partner) will get in touch with you for an introduction call. After that, you'll be invited for interviews. We look forward to hearing from you as soon as possible!
Interested in more than one Python team? Applying to a single vacancy is enough. We review every candidate for all our current openings to find the best match for your skills.
Important note: We know that in the current AI era, it's tempting to use technology to polish your interview performance. While we value your ambition, please do not use AI assistance during the screening process, so we can get to know the real person behind the resume.
Contact by job agencies and recruiters will not be appreciated. Each recruiter or headhunter who approaches us agrees with a donation of €250 for Make-A-Wish.
At Channable, we strive to create and foster an environment of belonging and collaboration and we believe in diverse and inclusive teams.
