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Senior Backend Engineer

  • Remote
    • Poznań, Poland
  • PLN 18,000 - PLN 22,500 per month
  • Elixir

Job description

See you @ our Elixir Team
As a company, we are crazy about the possibilities of Elixir. Our portfolio boasts many projects that were successful thanks to Elixir. These projects provide real value to both the clients and the users, and don’t waste time compromising on performance problems.
If you would like to learn more about our journey with Elixir technology and why we love it so much - check it out!

Let’s talk! 🚀

Salary:

18 000-22 500 PLN net/month B2B

15 070- 18 840 PLN/ gross monthly UoP

Job requirements

You’ll be a great fit if you:

  • 5+ years of experience as a Backend Developer

  • Solid knowledge of Elixir and its ecosystem:

    • knowledge about BEAM VM, clustering, message passing

    • familiarity with tools: ecto, exunit, phoenix, ETS

    • OTP knowledge

      • GenServer,

      • Supervisors,

    • Oban / Oban Pro,

  • Experience with:

    • PostgreSQL,

    • GraphQL (Absinthe),

    • Multi-tenant architectures,

  • Knowledge of Python, which is used to integrate our AI-core with the Elixir core.

  • Ability to write clear technical documentation.

  • Comfortable with direct client communication (daily syncs, demos, feedback).

  • Good written and spoken English

  • Proactive, ownership-driven attitude and strong collaboration skills.

Nice to have:

  • Experience with AI tooling or LLM frameworks:

    • LangGraph,

    • Pydantic AI,

    • LlamaIndex.

  • Knowledge of:

    • Graph databases (RDF with Turtle format),

    • Elixir LiveBooks,

    • Data pipelines, channels, websockets, and real-time applications.

  • DevOps fundamentals -Terraform and AWS.

  • Open to learning new languages that might play nicely with Elixir (Rustler / Zigler).

What we offer:

  • Space to grow and share your solutions- - we’re not into one methodology or tactic!

  • Budget for tools & learning, plus regular check-ins and mentorship

  • Open, feedback-driven culture with lots of transparency

  • Real impact on how the company works and what we build next

  • Knowledge about business - creating and analysing decisions, strategic support

  • No tasks - only real problems to solve

  • You decide how to organize your work

  • Opportunity to work with AI, LLMs, and agent-based architectures in Elixir

  • Flexibility: hours, form of employment, and pace of learning

  • Regular team trips to the client in Northern Europe (every 1–2 months)

  • Full ownership and autonomy in your work

  • Impact beyond code: you'll help shape product and business direction

  • Open and transparent feedback culture

Our recruitment process is only 4 steps long:

  1. Culture&mission fit meeting with Recruitment Team (abt 60 minutes)

  2. Technical task (2-3 days to complete)

  3. Video interview with our AI & Backend Team (abt 90 minutes.

  4. And finally, the decision, after which we can say “welcome on board.”

or

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Perks and benefits

Paid time off and sick days also for B2B contracts

Education & Training Budget

Remote first approach with flexible working hours

Spacious and stylish office if you prefer working on site

See our office in 3D

Organise team office space in your city

Private healthcare & life insurance

Co-financed multisport membership

Book formula - make a book-wish and we’ll grant it!

Being part of company events and meetups

See a video from one of our events

English lessons with a native speaker

A brand MacBook to work on

Additional budget for team outings

Got questions?  Feel free to contact us!

Send email

You will be in good hands! Our team will help guide you through the recruitment process and maintain communication throughout as well as share feedback with you.

Kinga Szałek

I see work as a genuine passion. For me, it’s about finding fulfillment and joy in what I do. By discovering new people, their unique talents and understanding their perspectives, I have the opportunity to build collaborative teams that continually grow. I invite you to join Appunite to be part of our thriving Team.

Milena Stareńczak

I believe that the Human Being always comes first: their story and needs. Only then we are able to come up with the best solutions. It's an approach that shines through in my role as a recruiter and psychologist on a daily basis. Still in search of creating the best recruitment process and candidate experience.

Magdalena Adamczak

Can a workplace be made up of inspiring people who are the missing piece of the company's puzzle and together create a space for activity and growth? Yes, at Appunite on a daily basis, the curiosity is learn about people and other perspectives never leaves me. I'm in doing sourcing amazing people, sounds good! Are you in?

Maciej Matwiejczyk

I'm passionate about making recruitment simple and effective, always upholding honesty and transparency throughout the process. I focus on the bigger picture in recruitment, ensuring every step aligns with long-term success. My approach prioritizes support and meaningful feedback for everyone involved, building strong connections and lasting matches.

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