Mid/Senior Full Stack Engineer


Cleeng is the Subscriber Retention Management Company. We help our clients create a long-life relationship with their subscribers by providing predictive analytics. Our solutions are used by market-leading brands like Sinclair Broadcast Group, CBC, Broadway HD, Korean Content Platform, McFit, and many others. Cleeng’s fully SaaS solution is built for scalability, flexibility, robustness, and innovation.

We’re looking for a talented full-stack software engineer who will help us build the next-generation subscriber management software. 

As Full Stack JavaScript Engineer you will design and build APIs that allow Cleeng’s clients to seamlessly integrate with our platform and develop front-end experiences (open-source UI components, new features for our analytical platform). 

We expect you to have a solid background in developing JavaScript applications, care about code quality and be a person that pays close attention to details. 

Once you join the team, you will have a direct impact on the future of our platform. We are searching for someone who is actively looking for ways to improve how things work and is interested in understanding the business domain as well.


  • Creating APIs and microservices with node.js in cloud environment (AWS)
  • Developing front-end applications using React.js
  • Crafting technical specifications and designing new product features
  • Conducting code reviews
  • Collaborating with other Scrum team members

Required Skills/Experience:

  • Solid understanding of API-centric applications
  • Demonstrated ability to build server-side applications powered by Node.js APIs (preferably 3+ years of experience)
  • Experience in building high quality front-end applications with React
  • Experience in working with development tools like webpack and state management tools like Redux
  • Solid English communication skills
  • Abstract thinking for understanding, modeling and documenting complex processes
  • A practical can-do mentality, with strong ability to get things done
  • Willingness to self-development and sharing knowledge with the Team.

Nice to have:

  • Experience with AWS Lambda / Serverless framework
  • Knowledge of TypeScript 
  • Experience with Jest or other testing frameworks
  • Experience or any knowledge of PHP

Few words about our tech stack and organization:

  • We use React as our primary frontend framework
  • Our APIs are built as Lambda functions inside AWS environment, using Node.js
  • We have automated tests & continuous integration process
  • Our transactional platform is built with PHP
  • We organize our work with Scrum
  • We love sharing knowledge and improving our skills during internal workshops and trainings!

What do we offer?

  • Good salary package, one that fits your needs;
  • Flexible working hours and form of employment;
  • Possibility to work 100% remotely;
  • 100 % paid sick leave with the agreed limits;
  • A great, full of energy and brand new space (Cleeng office) in the very middle of Poznan;
  • Equipment of your choice and additional accessories for your computer to make your work more efficient and comfortable;
  • Perks: private healthcare, sport’s card (Multisport), private bicycle parking, and partially refunded costs of car parking;
  • Co-financed trainings and conferences;
  • Events celebrations
  • Possibility to use your English on a daily basis;
  • Work on unique, market-leading, SaaS products, with clients all over the world, from New Zealand, Japan, Europe, US, and Latam;
  • Work closely with people who value diversity, hard work, friendly relationships and love their jobs, and get all together to the next level!

Play the video and get to know us

There are lots of reasons to work here

One talented and passionate team
Join a community of professionals who push each other to strive while enjoying what they do. We like to share knowledge, experience and inspire each other every day. We like to share our knowledge and experience. Be encouraged to share your ideas and perspectives!
Global scale
Diversity defines us. We have offices in The Netherlands, USA, Philippines, Australia, and Poland. Our different backgrounds and over 14 nationalities make our workspace a unique environment and a truly international experience.
Shape tomorrow's product
Don't just watch, participate in the future of premium content consumption. We are thriving in a booming and exciting industry where you could develop your skills.
Who said party?
Relaxed professionals, that’s our motto! Be part of a fun team. Expect dinners and meetups. Join our CS go or chess intercontinental tournaments. Travel the world to work face to face with your colleagues and enjoy the ride!