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(Senior) Full Stack Engineer – Apps (m/f/d)

Berlin (Remote)
Full-time
Permanent employee

Your Role

We’re looking for a Senior Full Stack Engineer (m/f/d) to build the products that put AI-powered revenue intelligence directly into the hands of sales teams. You’ll work across our entire stack, from React interfaces that make AI insights actionable to JVM-based backend services, owning features end to end and shipping product that sales teams rely on every day.

This is a hands-on role for someone who wants to work close to the product, take ownership of production systems, and build scalable software in a fast-moving, AI-first environment.

Your Mission

  • Own features end to end: Take features from concept to production across frontend and backend, from user interface to database to deployed service
  • Build multi-surface solutions: Ship product improvements across our web app, mobile-optimized field sales solutions, and CRM integrations
  • Surface AI insights: Develop React applications that make complex, AI-generated revenue intelligence actionable for sales teams
  • Power the platform: Build and maintain backend services in Kotlin with Spring Boot that handle scale and complexity
  • Design great APIs: Create and evolve both GraphQL and REST APIs that serve our diverse product surfaces
  • Work with data: Design solutions using PostgreSQL for transactional data and ClickHouse for analytics
  • Own what you deploy: Take full responsibility for your services in production. You build it, you run it, you improve it
  • Shape our architecture: Participate in code reviews and technical discussions that influence our technical direction

Your profile: What you need to succeed

We care more about your ability to solve problems and ship product than a checklist of technologies. That said, here’s what success in this role looks like:
  • Experience: 5+ years of professional software engineering experience shipping production code
  • Frontend expertise: Strong TypeScript and React skills with real-world production experience
  • Backend foundation: Solid JVM experience (Java or Kotlin) and practical Spring Boot experience
  • API and data design: Proven experience with relational databases and thoughtful API design
  • Operational basics: Comfortable with Docker and Kubernetes fundamentals
  • High agency: You identify problems and solve them without waiting for direction, with a clear bias toward action
  • Product mindset: You think about user impact and business outcomes, not just technical elegance

Nice to Have

  • Experience integrating AI or ML capabilities into production products
  • Familiarity with analytics databases such as ClickHouse or BigQuery
  • Experience with gRPC and microservices patterns

Why Acto?

  • Development Opportunities: Steep development opportunities without entrenched hierarchies.
  • Culture: We are an ambitious team that wants to achieve a lot with Acto, but we don't take ourselves too seriously and like to have fun together, be it working together or at regular team events.
  • Flexibility: Berlin-based with flexible remote work. You can work from home often, with regular in-person time in our Berlin office, particularly for key meetings and collaboration.
  • Health and work-life balance: Enjoy 30 days of vacation and an attractive Wellhub membership.
  • Ownership: Whether you are an intern or a full-time acto-naut, Acto instills a deep sense of ownership, where every team member is entrusted with meaningful responsibilities and the autonomy to make impactful decisions.
  • Equipment: You will receive a state-of-the-art hardware setup with a choice between Mac and Windows.

About us

Acto is building the AI Revenue OS for industrial companies — the system that determines where revenue is generated and what needs to happen next.

Today, the most important commercial decisions are still made manually: which customers deserve attention, where revenue is being lost, which opportunities are emerging, and which team needs to act.

We’re changing that.

Acto connects ERP, CRM, and behavioral data into a unified context, turns it into clear, actionable decisions, and ensures those decisions actually get executed in day-to-day operations.
No reporting. No additional dashboards. Just a system that actively drives and orchestrates revenue.

Our customers use Acto to unlock measurable growth from their existing customer base — with results like +5–11% revenue growth in their core business.

We’re starting in wholesale — one of the largest yet least digitized industries globally — and from there, building the central control layer for revenue across the entire industrial economy.

Backed by investors like 468 Capital and Cusp Capital, we’re already working with leading companies and scaling rapidly.