14 beste Stellen als senior java developer in berlin – aktuell auf Personalsuche

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Senior Full-Stack Ruby on Rails Developer

GAIA -
Berlin

Jetzt bewerben

Details zur Stelle

Leistungen

Flexible Arbeitszeiten

Qualifikationen

CI/CD
CSS
MongoDB
Master
Docker
Ruby on Rails
JavaScript
Redis
GitHub
APIs
SaaS
Künstliche Intelligenz

Vollständige Stellenbeschreibung

About GAIA

GAIA is an AI-powered legal operating system that revolutionizes how companies manage legal processes. We help fast-growing startups and mid-sized businesses fully digitize their legal workflows — from automated contract drafting, review, and data extraction to cap table management, ESOPs, shareholder resolutions, compliance checks, and financing simulations. By leveraging advanced AI, we make legal knowledge accessible to non-lawyers, reduce dependency on external counsel, and enable teams across departments to handle legal tasks efficiently and independently. We’re a growing, innovative team based in Berlin, building a modern SaaS platform with a strong focus on technical excellence, scalability, and AI-first automation. We’re a hybrid team and prefer Berlin-based candidates who can join us in the office around twice per week, though nearby candidates able to visit at least monthly are also welcome. Join us to shape the future of legal tech!

The Role

As a Senior Ruby on Rails Developer, you’ll play a key role in scaling our platform and driving AI-powered features that transform legal operations. You’ll take ownership of architecture, development, and innovation in a modern, collaborating closely with a small, high-performing team.

Key Responsibilities

Design & Build Features: Hands-on full-stack development using Ruby on Rails 7+, MongoDB, Redis, and modern frontend tools (Hotwire, Turbo, Stimulus, ViewComponent) to deliver scalable, user-centric features.
AI & Automation: Integrate and develop AI-powered capabilities, including LLM integrations, prompt engineering, automated contract generation/review/extraction, and intelligent workflows.
Scaling & Performance: Optimize the platform for growth, building high-performance, maintainable solutions (e.g., modular monolith architecture).
Deployment & Infrastructure: Work with our production-grade deployment setup using Kamal (zero-downtime Docker-based deploys) on Hetzner cloud infrastructure.
Frontend Excellence: Build responsive, maintainable UIs with Tailwind CSS, JavaScript, and a strong component-based architecture (ViewComponent + Stimulus).
Code Quality & Best Practices: Write clean, testable code (RSpec), conduct code reviews, and drive engineering standards.
Tech Ownership & Collaboration: Influence architectural decisions, mentor team members, and work closely with product, leadership, and other developers to translate business needs into technical solutions.
Stay Cutting-Edge: Keep up with Rails advancements, AI/ML trends, and legal-tech developments to bring fresh ideas to the table.

Our Tech Stack

Backend: Ruby on Rails 8 Sidekiq, MongoDB, Redis
Frontend: ViewComponent, Stimulus, JavaScript, Hotwire, Tailwind CSS
DevOps & Cloud: Docker, Hetzner, Kamal
CI/CD & Testing: GitHub Actions, RSpec
AI/LLM integrations and agentic workflows are core to our product.

What We’re Looking For

Experience & Background

At least 5+ years of professional experience with Ruby on Rails, ideally in SaaS/B2B environments.
Deep knowledge of modern web technologies and scalable architectures (modular monolith preferred).
production) — proven projects are a strong plus.
Experience with Tailwind CSS, modern JavaScript, and component-based frontend architecture.
Familiarity with Kamal deployments and/or Hetzner infrastructure is highly advantageous.
Product mindset: You focus on delivering real user value through technology.
Experience in knowledge-intensive domains (legal tech, compliance, finance) is a big advantage.
Comfortable in agile teams, code reviews, and small, fast-moving environments.

Core Competencies

Strong problem-solving and ability to ship high-quality features quickly.
Curious, experimental mindset — enjoy exploring new tools and solving open-ended challenges
Excellent communication and collaborative spirit.
Proactive ownership with minimal supervision.

What We Offer

Competitive compensation with meaningful equity upside
High impact — your work directly shapes how companies digitize legal work.
AI-first culture — central role for artificial intelligence in our platform.
Flexible, hybrid environment with flexible hours and minimal overhead meetings.
Growth opportunities — small A-player team that pushes each other, access to conferences/training.
All the tools and equipment you need to succeed.

Ready to Drive the Future of Legal Tech?

Join us in transforming how legal professionals work and building a category-defining company. If you’re ready to take on significant responsibility, drive meaningful growth, and shape the direction of GAIA, we want to hear from you.

Jetzt bewerben

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