Stackgini GmbH is a nine-person Berlin startup reshaping how large enterprises understand and manage their IT portfolios. The Product Engineer (m/f/d) role is a high-ownership position where you build features end to end, from scoping a customer problem to shipping and maintaining the solution. Getting your resume right for this kind of role requires precision, specificity, and a clear understanding of what the team actually values.
Understand What Stackgini Is Really Looking For
This is not a traditional engineering role where you pick up tickets and close them. Stackgini wants engineers who think like product owners and build like senior developers. The job posting makes that expectation clear from the start.
The company works with enterprise clients like Siemens Healthineers and REWE. Your resume needs to signal that you can operate in high-stakes, customer-facing environments. Experience shipping features that real users depend on matters here more than academic projects or internal tools.
AI is also central to this product. Stackgini has built its own LLM harness for enterprise environments, with a focus on EU data residency and governance. Candidates who understand how to work responsibly with large language models in production will stand out immediately.
Structure Your Resume for Maximum Impact
Keep your resume to one or two pages maximum. At a nine-person company, recruiters and engineers both review applications, often quickly. A clean, scannable layout helps your most relevant experience surface fast.
Use this section order for the best results:
- Contact information and location (Berlin or willingness to relocate)
- Professional summary (three to four lines maximum)
- Core technical skills
- Work experience (reverse chronological)
- Education
- Side projects or open source contributions (if relevant)
Your professional summary is the first thing a recruiter reads after your name. Use it to anchor your identity as a full-stack, product-minded engineer. Mention AI or LLM experience here if you have it.
What to Highlight in Your Work Experience
Every bullet point under your past roles should do real work. Vague statements like "contributed to backend development" tell Stackgini nothing useful. Specificity signals competence.
Focus on these themes when describing your experience:
- End-to-end ownership: Describe features you took from idea to production, not just tasks you completed
- Customer proximity: Mention any direct involvement in user research, customer calls, or support feedback loops
- Full-stack capability: Show that you can work across frontend, backend, and data layers without handoffs slowing you down
- AI and LLM integration: Highlight any work involving language models, prompt engineering, or AI-powered product features
- Startup or small team experience: Demonstrate you can operate without heavy process or large support structures
Quantify wherever possible. "Reduced query response time by 40 percent" beats "improved performance" every time. Numbers show scale and impact, both of which Stackgini cares about deeply.
How to Tailor Your Resume for This Specific Role
Generic resumes do not work well for focused, mission-driven startups. Stackgini is building a specific product for a specific problem, and they want people who genuinely understand that problem.
Read the job posting carefully and mirror the language it uses. The posting mentions phrases like "enterprise application landscape,""portfolio interdependencies," and "self-governing IT." If your background includes work in enterprise software, IT portfolio management, or large-scale application architecture, use similar terminology when describing your experience.
Tailor your professional summary to reflect Stackgini's mission directly. Something like: "Full-stack engineer with experience shipping AI-powered product features in enterprise environments, with a strong track record of end-to-end ownership and direct customer engagement." That kind of summary lands better than a generic one.
Also pay attention to culture signals in the posting. The line "at this size there is no hiding" is deliberate. Stackgini wants people who are comfortable with accountability and visibility. Your resume should reflect a history of owning outcomes, not just contributing to them.
ATS Tips for This Application
Even at a small startup, many companies use applicant tracking systems to filter resumes before a human sees them. Optimizing for ATS does not mean stuffing your resume with keywords. It means writing naturally while including the terms that matter most to the role.
Key terms to include naturally throughout your resume:
- Product Engineer
- Full-stack development
- LLM or large language models
- Enterprise software
- Feature ownership
- Customer feedback
- AI integration
- Berlin (or Germany if relevant)
- Agile or lean product development
- API design or backend architecture
Avoid using tables, headers inside text boxes, or unusual fonts. ATS systems often cannot parse these correctly, and your content may not get read at all. Use a clean, single-column or simple two-column layout with standard section headers.
Save your file as a PDF unless the application system specifically requests a Word document. PDFs preserve formatting and render consistently across devices.
Skills Section: What to Include
Your skills section should be concise and honest. Do not list every technology you have ever touched. Focus on the tools and concepts most relevant to a product engineering role at a company building AI-powered enterprise software.
Consider organizing your skills into these categories:
- Languages: Python, TypeScript, JavaScript, or others you use fluently
- Frontend: React, Vue, or similar frameworks
- Backend: Node.js, FastAPI, Django, or equivalent
- AI and ML: LLM integration, prompt engineering, vector databases, embeddings
- Data and infrastructure: PostgreSQL, cloud platforms, containerization
- Product: User research, feature scoping, roadmap input, A/B testing
If you have worked with any LLM frameworks or built production AI features, make that visible and prominent. Stackgini built its own LLM harness for a reason. Engineers who understand the complexities of deploying AI at enterprise scale bring immediate value.
What Recruiters at Early-Stage Startups Notice
At a company with nine people, the hiring process is personal. The people reviewing your resume are likely the same people you will work alongside daily. They are not just evaluating your technical skills. They are trying to picture you on a customer call, in a product discussion, and in a codebase they care about deeply.
Recruiters at early-stage startups pay close attention to career trajectory. A pattern of increasing responsibility, shipped products, and direct customer impact reads very well. Gaps are less concerning than a history of roles where ownership is unclear.
Cover letters are not always required, but a short, sharp one tailored to Stackgini's mission can separate you from candidates with similar technical profiles. Reference the specific problem they are solving, the enterprise clients they work with, and why that space matters to you. Authenticity lands better than polish at this stage of a company.
Avoid listing responsibilities that sound copied from a job description. Show what you actually built, what broke, how you fixed it, and what customers said afterward. That kind of narrative builds trust before the first conversation even happens.
Apply for the Stackgini GmbH Product Engineer (m/f/d) role directly here: https://www.arbeitnow.com/jobs/companies/stackgini-gmbh/product-engineer-berlin-453404
