Senior Elixir Engineer

AppUnite LLC; Remote; PLN 180,000 - 240,000; Full time

Job summary

A leading technology company located in Poland seeks an experienced Backend Developer specializing in Elixir. This role demands solid knowledge of Elixir's ecosystem and experience with PostgreSQL and GraphQL. Candidates must possess excellent English communication skills and a proactive attitude. The position offers flexibility and opportunities to work with cutting-edge AI technologies while collaborating directly with clients. A salary ranging from 21,500 to 26,000 PLN net per month is on offer, alongside a stimulating and supportive work environment.

Benefits

Budget for tools & learning

Open feedback-driven culture

Full ownership and autonomy

Regular team trips to clients

Qualifications

• 5+ years of experience as a Backend Developer.
• Solid experience with Elixir and its ecosystem including BEAM VM.
• Familiarity with PostgreSQL and GraphQL.
• Ability to communicate directly with clients.

Responsibilities

• Develop and maintain applications using Elixir.
• Integrate AI-core with Elixir core using Python.
• Write clear and comprehensive technical documentation.
• Collaborate directly with clients during projects.

Skills

Elixir

PostgreSQL

GraphQL

Python

Technical documentation

English

Client communication

Proactivity

Tools

ecto

exunit

phoenix

Oban

AWS

Terraform

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 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:

21 500-26 000 PLN net/month B2B

17 850 - 21 500 PLN/ gross monthly UoP

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:

Video interview with Recruitment Team (abt 40 minutes)

Technical task or pair programming- You choose what you prefer

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

Video interview with the client (abt 60 minutes)

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