Founding Engineer for an AI startup (.NET / Backend only / AI integrations) Offline

About Us:

Lemmi is an AI-powered career companion revolutionizing how professionals navigate their career journey. We simplify the job search process by providing intelligent guidance on best practices and automating routine tasks. 

Our platform features AI-powered mock interviews that identify skill gaps, provide targeted practice, and build confidence through measurable progress tracking.

As an early-stage Ukrainian startup with a globally distributed team, we're building the future of career development technology.

Your Mission:

As our .NET Engineer, you will work directly with the founder and our development team to implement product strategy and prepare our platform for scale. This is an exceptional opportunity to gain hands-on experience in an early-stage startup while diving deep into modern .NET development, generative AI, and Python technologies. You'll develop crucial product thinking skills while contributing to a mission-driven platform that helps thousands of job seekers land their dream roles.

Requirements:

Must-Have:

• Strong knowledge of C# and .NET ecosystem
• Strong problem-solving abilities and critical-thinking skills
• Ability to work independently while knowing when to seek guidance
• Deep experience using AI coding tools like Claude Code or Cursor in your daily work
• At least 3 years of commercial experience
• Prompt engineering skills

Nice-to-Have:

• Basic Python programming skills
• Understanding of Generative AI/LLM concepts
• Experience with cloud services (AWS/GSP)
• Familiarity with agile development practices

Key Responsibilities:

• Feature Development: Extend current functionality and collaborate closely with the frontend team to deliver seamless new features
• System Architecture: Work alongside senior back-end engineers to stabilize and optimize our backend infrastructure while addressing technical debt
• Build Core Systems: Develop a retention engine and flexible notification system from scratch (with supervision) to enhance user engagement based on behavioral patterns
• Cross-Functional Collaboration: Participate in product discussions and contribute ideas for improving user experience

Why Join Us:

• Direct Impact: Your code will directly shape product development and impact thousands of users' career journeys
   
• Exceptional Learning Opportunity: Work directly with our founder and senior engineers (back-end and machine learning specialists) who are committed to mentoring and accelerating your professional growth
   
• Ultimate Flexibility: Choose work hours that suit your lifestyle (~15-20 hours/week), perfect for balancing with studies or other commitments
   
• Growth Potential: Clear progression path from junior to senior roles as we scale, with opportunities to lead future initiatives
   
• Cutting-Edge Technology Stack: While focusing on core .NET solutions, you can contribute to our AI components in Python and explore modern generative AI integrations, prompt engineering, and LLM concepts
   
• Industry Insider Knowledge: Gain unique insights into job market dynamics, recruitment strategies, and career development best practices that will benefit your own career forever

Our Values:

• Continuous Learning: We embrace challenges as opportunities and invest in constant skill development
   
• Ownership: We take full responsibility for our work, delivering results that exceed expectations
   
• Customer-First: We're passionate about solving real problems that help people advance their careers
   
• Data-Driven: We base decisions on research, metrics, and user feedback rather than assumptions
   
• T-Shaped Development: We cultivate broad knowledge across engineering and product domains while developing deep expertise in our specialties

Our team:

- 1 Founding FE Engineer (Staff), 1 Senior FE Engineer, 1 Middle FE Engineer
- 1 Senior .NET Engineer

- 1 Founding Python Engineer (Staff)

- CPO (co-founder) + 2 Product Mangers

- UI/UX Designer

- Sales Manger

- CEO/Founder with technical background

Important Note:

This position begins as an equity-based opportunity as we're an early-stage startup preparing for our initial investment round in early 2026. The paid option won't be available, at least, until the end of Q1 2026. Upon successful funding, this role will transition to a competitive full-time or part-time paid position. This is an ideal opportunity for motivated individuals who want to get in on the ground floor of a promising startup and grow with the company.

We are a Ukrainian startup with team members distributed globally, operating with a remote-first culture.