Full-Stack Engineer

Helios & Eos

. Develop internal products and infrastructure that are used daily and evolved into scalable platforms .

Posted 10/12/2026full-timeOldenburg • GermanyMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in Full-Stack Development with a focus on TypeScript, JavaScript, Python, and Rust, while effectively translating business requirements into scalable software solutions. Proficient in modern frameworks and practices, including CI/CD, data modeling, and performance optimization.

Highest-signal resume keywords

Full-Stack DevelopmentTypeScript / JavaScriptNext.jsProduction MindsetData Modeling

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

PythonRustReactSupabasePostgreSQLTestingCI/CDMonitoringPerformance OptimizationCaching

Soft Skills

Playful CuriosityExcellent Communication

Tools & Technologies

VercelCloudflareAWSDockerElectron

Industry Keywords

Asset ManagementFinTechSME SectorB2B ConsultingEnterprise Clients

Tech Stack

Tools & technologies

AWSDockerElectronJavaScriptNext.jsPostgresPythonReactRustTypeScript

About the role

Key responsibilities & impact

Develop internal products and infrastructure that are used daily and evolved into scalable platforms
Develop external solutions for clients in asset management, FinTech, and the SME sector
Translate business requirements into production-ready software
Work on web apps, data pipelines, and agent architectures
Build clean automations, pipelines, and workflows
Develop frontend, backend, and agent systems based on your strengths and the projects at hand
Optional: Participate in technical workshops, architecture reviews, and on-site client meetings
Work directly with the founder and help shape the tech stack, architecture, and engineering culture

Requirements

What you’ll need

4+ years of professional experience as a Full-Stack Developer
Experience with TypeScript / JavaScript, Python, and Rust
Strong knowledge of Next.js, React, and a modern database such as Supabase, PostgreSQL, or an equivalent technology
Production mindset: testing, CI/CD, and monitoring are standard practice
Backend experience with data modeling, authentication, performance optimization, and caching
Playful curiosity about AI and agent tools
Excellent German and English skills
Nice to have: hands-on experience integrating LLMs into production, agent frameworks or multi-agent setups, Electron or other desktop frameworks, DevOps technologies such as Vercel, Cloudflare, AWS, and Docker, open-source projects or technical blog posts, B2B consulting, or direct work with enterprise clients

Benefits

Comp & perks

Direct access to the founder and a chance to shape the company — work with Felix every day and help define the tech stack, architecture, and engineering culture
Learn AI and agent engineering on the job — use Cursor, Claude Code, the Anthropic API, and multi-agent setups in production, learning from day one what many developers only encounter in our training programs
Greenfield development with a 2026-ready tech stack — no legacy systems and no process theater
Top-tier hardware and all the tools you need
Learning and conference budget — €2,000 per year for books, courses, and conferences
30 days of vacation
On-site phase followed by hybrid work — spend approximately the first 3–6 months in the office (Oldenburg, August-Hanken-Straße) for onboarding and building trust, then transition to a hybrid model (2–3 days in the office, the rest remote)
Flexible working hours — we measure results, not time clocks
Production over demos — what you build runs in real-world production for clients and in our products
Real impact — not a 200-person corporation where your work disappears into a subproject