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Software Engineer at AIOS — Hybrid, €60k-€120k /yr + equity

Fella & Delilah· Engineering
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Hybrid (Kosovo)€60k - €120kFull-timePosted 2mo ago

About the role

Software Engineer at AIOS working on building apps, tools, and services for customers, clinicians, and internal teams with a focus on high-quality, scalable software and AI-driven development in a hybrid remote role.

Responsibilities

  • Build Products End to End: You’ll work closely with product and design to understand the problem, shape the solution, build it across the stack, and carry it through production.
  • Own the Experience: You’ll care about the complete experience, including edge cases, loading states, performance, reliability, and the small details that determine whether a product feels excellent.
  • Build to Last: You’ll write clear, tested, observable, and maintainable software. You’ll choose simple architectures, handle failure cases properly, and strengthen the foundations beneath your work.
  • Own Production: You’ll instrument what you ship, follow the relevant metrics, investigate failures, and keep iterating until the product creates the intended outcome.
  • Use AI as a Force Multiplier: You’ll use Claude Code, Codex, and other AI tools throughout development to move faster, explore more ambitious solutions, and increase the quality of your work.
  • Raise the Engineering Bar: You’ll review code seriously, communicate decisions clearly, share context, improve weak systems, and help the engineers around you do better work.

Qualifications

  • Experience: 3+ years of professional software engineering experience and have shipped meaningful products used by real customers.
  • Full-Stack Engineering: You can deliver across frontend and backend systems. You may be significantly stronger on one side, but you are comfortable working across both.
  • Product Mindset: You care about what should be built, how it feels to use, and whether it creates the intended outcome.
  • Engineering Quality: You write clear, tested, observable, and maintainable software. You understand architecture, databases, APIs, failure modes, and production reliability.
  • Ownership: You acquire context proactively, raise uncertainty early, follow your work into production, and take responsibility for reaching the outcome.
  • Judgment: You can balance speed, simplicity, and long-term maintainability. You push back clearly when a technical or product decision does not make sense.
  • AI-Native Execution: You use AI development tools effectively and remain fully accountable for the quality and correctness of the work they help you produce.

Skills

Required:Experience with full-stack software engineeringFrontend and backend developmentProduct mindsetCode quality and maintainabilityAI tooling

Benefits

  • Healthcare: comprehensive medical insurance (if appropriate).
  • Vacation: PTO with a yearly minimum (≥2wks/yr + local national holidays)
  • Personal development: budget for books, courses, coaching.
  • Personal wellness: budget for gym, health apps.
  • GLP-1s: free membership with a clinic offering GLP-1s.
  • Equipment: Macbook & work-from-home equipment provided as needed.
  • What are we missing? You get to shape our culture.
Last updated Oct 21, 2026. Interested? Apply on the company site.
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About Fella & Delilah

Fella & Delilah is the direct-to-patient clinic for busy families to…

Fella is optimized for busy bigger guys who want a no-nonsense solution to getting healthier. Delilah is built for strong women in their prime who want a sustainable solution to feel their best. We use affordable, effective weight loss medication to solve our customers’ most pressing healthcare need, then aim to remain their core healthcare provider for the rest of their life — expanding to hormonal health, mental health, longevity, and primary care. **We’ve grown >1000x since Aug 2021, >100x since Aug 2022, >10x since Aug 2023**. We’re >$50M ARR. We’ve been cashflow positive for the last 24mo. We’re >10,000 customers with high NPS. Almost all of this has so far been through Fella. Delilah is still very new. We’re a young startup and we’re just getting started. This is still Day 1 and all our work is ahead of us. You can read more about working at Fella & Delilah here: https://www.notion.so/Working-at-Fella-Delilah-14a2ac8575d34d148d009bb410387af4?pvs=21

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