Full stack-ontwikkelaar

Kariz; Amsterdam; Remote; EUR 72,000 - 88,000; Full time

Job summary

A tech-focused company is seeking a Senior Full Stack Engineer to develop their platform. You'll be responsible for coding the frontend with React and creating complex automation workflows for customers. Ideal candidates have experience with workflow logic, REST APIs, and possess strong communication skills. The role offers direct collaboration with founders and a focus on building scalable solutions. Attractive equity compensation structure is available, with a target salary of over 80k at the next funding round.

Qualifications

• Proven experience creating business automations using tools like n8n or Zapier.
• Deep knowledge of REST APIs, Webhooks, and complex JSON data transformation.
• Fluent English with previous experience in client interaction roles.
• Capable of bridging the gap between technical constraints and customer needs.
• Proficient in .NET 9 backend technologies.

Responsibilities

• Code the frontend of our platform using React & React Flow.
• Create complex automation workflows directly for our customers.
• Work with backend systems as needed.

Skills

Workflow Logic

API Proficiency

Customer Facing

Communication

Proficient in C# / .NET

Fluent in Dutch

Fluent in English

Tools

React Flow

PostgreSQL

NoSQL

Docker

AWS Kubernetes (EKS)

ELK Stack

Job description

Location

Remote (+/- 3 hours from Amsterdam CET)

Role Summary

We are looking for a Senior Full Stack Engineer. You will be coding the frontend of our platform (using React & React Flow) AND creating complex automation workflows directly for our customers. You will also work with the backend at times. You need to be technical enough to build the tool, but business-savvy enough to use it to solve customer problems.

Must-Haves

• Workflow Logic: Proven experience creating business automations using tools like n8n or Zapier. You understand triggers, actions, and logic loops.
• API Proficiency: Deep knowledge of REST APIs, Webhooks, and complex JSON data transformation.
• Customer Facing: Fluent English with previous experience in a role involving direct client interaction (e.g., Solutions Engineer, Technical Consultant).
• Communication: capable of bridging the gap between technical backend constraints and customer business requirements.
• Proficient in C# / .NET: Our core backend is .NET 9.
• Dutch native or professional.
• English native or professional.

High Priority Skills

• React Flow: Our frontend relies heavily on React Flow. Experience with this specific library (or similar node-based/graph UI libraries) is a massive plus.
• Databases: We use both PostgreSQL and NoSQL. Experience querying both is helpful.
• Deployment & Testing: We use Docker for testing and deploy to AWS Kubernetes (EKS). Familiarity with containerized workflows is preferred.
• Observability: Experience with the ELK Stack (Elasticsearch, Kibana, Logstash) for checking logs and debugging.
• AI: Experience deploying or integrating LLMs.

Hiring Founding Engineer at Kariz

Kariz is building the infrastructure for the AI-native web. We are building a high-performance Embedded iPaaS for companies to automate their work at scale.

We are solving the "Integration Hell" problem for SaaS companies by letting them ship customer-facing integrations in hours, not months.

Why join as our First Engineer?

• Ownership: You aren't maintaining legacy code. You are building a high-scale engine from the ground up, millions of daily executions, complex front-end logic (React Flow), and AI agent orchestration.
• Founder Contact: You’ll work directly with the founders to define the product roadmap. We value shipping and trust you to choose the best tool for the job.
• Hard Problems: You’ll be solving complex challenges in distributed systems, secure token management (OAuth), and low-latency workflow execution.
• Salary: Equity based comp (80k+ at next round of funding)