Senior Fullstack Engineer

About the Role

This is a senior fullstack engineering role at a fast-growing European Voice AI startup, building a platform that automates business phone calls for thousands of SMEs. You will own features end-to-end, from concept to production, with direct input into product direction and a strong emphasis on deep, focused work.

What You'll Do

Own features completely, from idea and prototype through to production code used by thousands of customers across Europe. Build and evolve the platform using NestJS and React, shipping updates on a near-daily cadence. Engage directly with customers through support, feedback sessions, and user testing to surface real needs.

Prioritise ruthlessly by breaking features into their highest-value parts, then iterating based on real-world feedback. Take on product and opportunity prioritisation for the Voice AI product as you grow into the role. Enjoy a meeting-light culture structured around maximising deep, focused engineering time.

What We're Looking For

5+ years of hands-on fullstack engineering experience delivering end-to-end features in SaaS products. Strong production experience with TypeScript, React, and Node.js, with NestJS experience strongly preferred. Substantial experience across both backend and frontend; frontend-only backgrounds are not a fit for this role.

Native German proficiency, plus fluent English for team and product communication. Experience with product discovery: forming hypotheses, running experiments, and using metrics to make data-driven decisions. Comfort with direct customer interaction, including support, feedback collection, and user testing.

A pragmatic, high-ownership mindset: you cut scope without cutting value and thrive with full end-to-end responsibility. Experience integrating LLMs (such as OpenAI) into production applications is a plus. Familiarity with GDPR or EU AI Act considerations for AI services is a plus.

Prior experience in high-velocity startup environments shipping frequently is a plus. Compensation & Benefits Salary range: 80,000 to 120,000 EUR annually. Visa sponsorship is not available for this role.

Location Fully remote, based in Germany.

ABOUT THE ROLE

This is a senior fullstack engineering role at a fast-growing European Voice AI startup, building a platform that automates business phone calls for thousands of SMEs. You will own features end-to-end, from concept to production, with direct input into product direction and a strong emphasis on deep, focused work.

WHAT YOU'LL DO

• Own features completely, from idea and prototype through to production code used by thousands of customers across Europe.
• Build and evolve the platform using NestJS and React, shipping updates on a near-daily cadence.
• Engage directly with customers through support, feedback sessions, and user testing to surface real needs.
• Prioritise ruthlessly by breaking features into their highest-value parts, then iterating based on real-world feedback.
• Take on product and opportunity prioritisation for the Voice AI product as you grow into the role.
• Enjoy a meeting-light culture structured around maximising deep, focused engineering time.

WHAT WE'RE LOOKING FOR

- 5+ years of hands-on fullstack engineering experience delivering end-to-end features in SaaS products.

• Strong production experience with TypeScript, React, and Node.js, with NestJS experience strongly preferred.
• Substantial experience across both backend and frontend; frontend-only backgrounds are not a fit for this role.
• Native German proficiency, plus fluent English for team and product communication.
• Experience with product discovery: forming hypotheses, running experiments, and using metrics to make data-driven decisions.
• Comfort with direct customer interaction, including support, feedback collection, and user testing.
• A pragmatic, high-ownership mindset: you cut scope without cutting value and thrive with full end-to-end responsibility.
• Experience integrating LLMs (such as OpenAI) into production applications is a plus.
• Familiarity with GDPR or EU AI Act considerations for AI services is a plus.
• Prior experience in high-velocity startup environments shipping frequently is a plus. COMPENSATION & BENEFITS Salary range: 80,000 to 120,000 EUR annually. Visa sponsorship is not available for this role. LOCATION Fully remote, based in Germany.