Software Development

apeirum

1-10

Founder

Spain

At **apeirum**, we help bold visions become digital realities — with focus, sharp execution, and no waste. We’re looking for a **mid-level software developer** who loves building great software, takes initiative, and uses **AI productivity tools** to work smarter and deliver faster.

## Tasks

**What you’ll be doing**

*   Designing, developing, and maintaining applications using **.NET** (preferably) or another object-oriented language.
*   Applying **SOLID principles** and **design patterns** to create clean, maintainable code.
*   Implementing and integrating **REST APIs**.
*   Working with **relational databases** (SQL Server, MySQL, PostgreSQL) — ideally with **Entity Framework**.
*   Writing and maintaining **automated tests** to ensure code quality.
*   Collaborating with the frontend team and contributing to applications built in **Angular** (React knowledge is a plus).
*   Leveraging **AI-assisted coding and productivity tools** to speed up development, improve quality, and optimize workflows.
*   Taking ownership of tasks, working **autonomously**, and proactively solving problems.
*   Contributing to discussions on **infrastructure topics** and improving our technical processes.

**Nice-to-haves**

*   Experience with **Domain-Driven Design (DDD)**.
*   Broader infrastructure knowledge and willingness to dive into DevOps-related topics.

## Requirements

**You’re a Great Fit If You**

*   **Bachelor’s or Master’s degree** in Computer Science, Software Engineering, or a related field.
*   Have **3–5 years** of professional experience in software development (mid-level range).
*   Communicate clearly and confidently in **English**.
*   Are motivated and **love creating software** that makes an impact.
*   Care deeply about **product quality** and the value it delivers to users.
*   Are **product-minded** — you think about the _why_, not just the _what_.
*   Work **self-driven** and thrive in small, async, distributed teams.
*   See challenges as opportunities and are ready to **grow into more responsibility**. 

**Tech Stack Overview**

*   **Frontend:** Angular & Ionic (React experience is a plus)
*   **Backend:** C#, .NET Core, Web API, Entity Framework
*   **Cloud:** Azure (Functions, VMs, App Services, Monitoring, Storage)
*   **Database & Backend Services:** SQL (SQL Server, MySQL, PostgreSQL) and Supabase
*   **Bonus:** Python & C++ (used in our 3D pipeline — nice to have, not required)

**Mindset & Collaboration**

*   Strong **problem-solving skills** and the ability to think critically.
*   Passion for **AI-driven productivity** — you actively use AI tools to accelerate development, improve quality, and explore new possibilities.
*   Comfortable in a **fast-paced, startup-like** environment with a problem-solving, _AI-first_ approach.

## Benefits

**Why Join apeirum?**

*   Work in an **international, high-performance team**.
*   Be part of projects where **your input matters** — from architecture to implementation.
*   Flexible work setup with **trust-based autonomy.**
*   A culture that values **quality, initiative, and growth** over bureaucracy. 
*   Join us for a yearly **strategic offsite meeting** filled with team-building activities and social events.

**Ready to Make an Impact?**

We’re looking for someone who thrives in a fast-paced, innovation-driven environment — someone adaptable, curious, and ready to solve real problems with smart, modern tools. If that sounds like you, **we’d love to hear your story.**

Employee

Professional / Experienced

At apeirum, we help bold visions become digital realities — with focus, sharp execution, and no waste. We’re looking for a mid-level software developer who loves building great software, takes initiative, and uses AI productivity tools to work smarter and deliver faster.
<h2 id="tasks">Tasks</h2>
What you’ll be doing
<ul>
<li>Designing, developing, and maintaining applications using .NET (preferably) or another object-oriented language.</li>
<li>Applying SOLID principles and design patterns to create clean, maintainable code.</li>
<li>Implementing and integrating REST APIs.</li>
<li>Working with relational databases (SQL Server, MySQL, PostgreSQL) — ideally with Entity Framework.</li>
<li>Writing and maintaining automated tests to ensure code quality.</li>
<li>Collaborating with the frontend team and contributing to applications built in Angular (React knowledge is a plus).</li>
<li>Leveraging AI-assisted coding and productivity tools to speed up development, improve quality, and optimize workflows.</li>
<li>Taking ownership of tasks, working autonomously, and proactively solving problems.</li>
<li>Contributing to discussions on infrastructure topics and improving our technical processes.</li>
</ul>
Nice-to-haves
<ul>
<li>Experience with Domain-Driven Design (DDD).</li>
<li>Broader infrastructure knowledge and willingness to dive into DevOps-related topics.</li>
</ul>
<h2 id="requirements">Requirements</h2>
You’re a Great Fit If You
<ul>
<li>Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related field.</li>
<li>Have 3–5 years of professional experience in software development (mid-level range).</li>
<li>Communicate clearly and confidently in English.</li>
<li>Are motivated and love creating software that makes an impact.</li>
<li>Care deeply about product quality and the value it delivers to users.</li>
<li>Are product-minded — you think about the why, not just the what.</li>
<li>Work self-driven and thrive in small, async, distributed teams.</li>
<li>See challenges as opportunities and are ready to grow into more responsibility.</li>
</ul>
Tech Stack Overview
<ul>
<li>Frontend: Angular &amp; Ionic (React experience is a plus)</li>
<li>Backend: C#, .NET Core, Web API, Entity Framework</li>
<li>Cloud: Azure (Functions, VMs, App Services, Monitoring, Storage)</li>
<li>Database &amp; Backend Services: SQL (SQL Server, MySQL, PostgreSQL) and Supabase</li>
<li>Bonus: Python &amp; C++ (used in our 3D pipeline — nice to have, not required)</li>
</ul>
Mindset &amp; Collaboration
<ul>
<li>Strong problem-solving skills and the ability to think critically.</li>
<li>Passion for AI-driven productivity — you actively use AI tools to accelerate development, improve quality, and explore new possibilities.</li>
<li>Comfortable in a fast-paced, startup-like environment with a problem-solving, AI-first approach.</li>
</ul>
<h2 id="benefits">Benefits</h2>
Why Join apeirum?
<ul>
<li>Work in an international, high-performance team.</li>
<li>Be part of projects where your input matters — from architecture to implementation.</li>
<li>Flexible work setup with trust-based autonomy.</li>
<li>A culture that values quality, initiative, and growth over bureaucracy. </li>
<li>Join us for a yearly strategic offsite meeting filled with team-building activities and social events.</li>
</ul>
Ready to Make an Impact?
We’re looking for someone who thrives in a fast-paced, innovation-driven environment — someone adaptable, curious, and ready to solve real problems with smart, modern tools. If that sounds like you, we’d love to hear your story.

Mid-Level Software Developer (.NET / Angular / Ionic)

Full-Stack Developer (Freelance or Temporary Role)

user JOIN

Apeirum logo

Google {privacyLink} and {termsLink} apply.

Benefits

Media

We don't have any open positions at the moment

No available jobs

Offices

Open positions

Values

Videos

Do you have a question?

Spontaneous Application

We’ll send a link to this job to your email.

No time? Just apply later

We are reviewing your account. Once our managers approve it, candidates will be able to apply for this job.

Changes are not visible until you publish your job.

This is a preview of your job ad.

Interested?

The job {jobTitle} was archived or the deadline has passed.

This job is no longer available

Recruiting Team

Our other open positions

We no longer accept spontaneous applications

Are you a talented professional seeking your next career adventure? At {companyName}, we appreciate proactive individuals who can bring a fresh perspective to our team.

While we may not have an immediate job opening that precisely matches your needs, your distinctive experiences and talents might be an excellent fit for us in the future.

To submit your spontaneous application, please use the application form on the right to upload your CV and cover letter. Ensure that you mention your desired position in the cover letter.

Rest assured, our dedicated recruiting team will reach out to you once they identify a role that aligns perfectly with your skills and aspirations.

How to apply

Looking for a job at {companyName}? JOIN works directly with {companyName} to bring you all their open positions. Apply now with JOIN.com.

Jobs at {companyName}. Browse all open positions and become part of our team! Open positions: {jobsCount}

Jobs at {companyName}. Browse our open jobs and join us! We currently have {jobsCount} available jobs. Step up your career and apply today!

Jobs at {companyName}. Browse all our open positions and become part of our team! We have currently {jobsCount} jobs available. Apply today to join us!

Jobs at {companyName}. Browse all open positions and become part of our team! We are currently looking for {jobsCount} additions to our company. Apply today!

Jobs at {companyName}. Browse all open positions and become part of our growing team! We are currently looking for {jobsCount} additions to our company. Apply today!

Jobs at {companyName}. Browse all our open positions and become part of our growing team! We are currently looking for {jobsCount} additions to our company. Apply today!

Browse all our open positions and become part of our team! We are looking for {jobsCount} additions to our company. Take the next step in your career and apply today!

No suitable positions available at {companyName}? Don't wait! Submit a spontaneous job application today and unlock your career possibilities tomorrow.