Back End Developer

Salento; Rotterdam; Hybrid; EUR 54,000 - 90,000; Full time

Benefits offered by this job

Hybrid work environment

Growth opportunities

Competitive salary

Job summary

Salento in Rotterdam is seeking a Senior Backend Engineer to design and build scalable AI-driven SaaS backend systems. You will influence architectural decisions, and improve reliability and performance in a fast-paced, hybrid environment.

The role requires seniority with Python, FastAPI, Elasticsearch and SQL/NoSQL databases, with bonus for vector search and LangChain. You will join a growing team that values clear communication, ownership, and hands-on contribution to high-impact features,

Qualifications

• Demonstrable seniority with Python, FastAPI, Elasticsearch and SQL & No-SQL databases.
• Interest in absorbing AI & ML knowledge.
• Demonstrable experience in system design and architecture.

Responsibilities

• Design and build scalable backend systems.
• Contribute to architectural decisions and overall technical direction.
• Improve reliability, performance and maintainability of the platform.

Skills

Python

FastAPI

System design

SQL & NoSQL

AI & ML interest

Tools

Elasticsearch

Vector search

LangChain

Job description

Senior Backend Engineer – AI-Driven SaaS Product – up to EUR 90K – Rotterdam / Hybrid

My client is a scale-up that has built and is continuing to scale a successful AI-driven SaaS product. The international customer base is growing rapidly, and they are backed by solid investments. The product provides answers to one of the most critical questions of our time: "Which emerging technologies will matter, how soon, and by how much?" My client can share solid used cases in which customers were able to avoid to get disrupted and/or built strong partnerships due to the insights of this AI driven SaaS product.

The enormous attention for AI (e.g. ChatGPT) has paid off for my client. Of course, my client also integrates the possibilities of ChatGPT like tooling into their product. But my client was already working on their vision before the current AI hype. And they have crafted their own models from scratch.

As a Senior Backend Engineer, you will design and build scalable backend systems. You are thus expected to actively contribute to architectural decisions and the overall technical direction. Next tot his, you will improve the reliability, performance and maintainability of the platform.

The team is mature and they built high quality features in a fast paced environment.

You bring:

• An enthusiastic personality, you are good with people and like to help! And you thrive well in a transparent and honest company culture;
• Demonstrable experience in system design and architecture;
• Interest in absorbing AI & ML knowledge;
• Demonstrable seniority with Python, FastAPI, Elasticsearch and SQL & NO-SQL databases.
• Bonus points if you already have a background with vector search, LLMs & LangChain.

Some of the benefits that my client has to offer:

• Working with very ambitious and driven people in a great scale-up environment;
• Many growth opportunities: with rapid growth, new functions appear. Deliver, show energy and challenge assumptions, and you will quickly get new challenges and responsibilities;
• Hybrid working setup, there is a policy of working 3 days in the office, so that the team can learn together and collaborate on challenging projects;
• Gross annual salary up to 90k and strong secondary package.