Senior Software Developer

QOCO Systems; Espoo; On-site; EUR 50,000 - 75,000; Full time

Benefits offered by this job

Lunch & sport perks

Occupational healthcare

Free breakfast at the office

Job summary

QOCO Systems in Espoo is hiring a Senior Software Developer to build impactful SaaS solutions for the aviation industry. You will develop scalable systems using C#/.NET or Node.js and work in an AI-native environment with innovative tools.

The ideal candidate has strong full-stack skills, experience with TypeScript and React, and a proactive, AI-driven approach to software development. The role offers flexible working hours, a collaborative team, and several benefits including lunch perks and occupational healthcare.

Qualifications

• Strong full-stack development skills.
• Experience with Node.js or C#/.NET on the backend.
• Experience with TypeScript and React.
• An AI-native mindset, actively using AI tools.
• Experience with Docker and cloud environments.
• Strong communication skills and a proactive attitude.
• Fluency in English, both written and spoken.

Responsibilities

• Building scalable SaaS solutions using C#/.NET or Node.js.
• Working in an AI-native development environment.
• Exploring and adopting new AI-driven development tools.
• Contributing to the technical direction of core products.
• Collaborating closely with product, design, and other engineers.

Skills

Full-stack development skills

Node.js or C#/.NET experience

TypeScript and React experience

AI-native mindset

Docker and cloud environments

Strong communication skills

Fluent in English

Tools

Copilot

Claude Code

Job description

We're hiring an Senior Software Developer to join our crew at QOCO Systems!

Are you excited about building impactful SaaS products and working with modern AI-assisted development tools? Do you want to be part of a scale‑up that’s shaping the future of aviation technology? Then we would love to hear from you.

We’re looking for developers who are AI-native in their approach to software development. Developers who actively leverage AI tooling to boost productivity, while still maintaining strong engineering fundamentals.

At QOCO, we develop SaaS solutions that help global airlines and MROs (Maintenance, Repair, and Operations) turn complex data into smooth operations and reduced aircraft downtime. As an AI‑Native Developer, you’ll play a key role in building scalable systems and helping us rethink how modern software is developed.

What you’ll be doing

• Building scalable SaaS solutions using C#/.NET or Node.js on the backend and TypeScript/React on the frontend

• Working in an AI-native development environment, using tools such as Copilot and Claude Code

• Exploring and adopting new AI‑driven development tools that improve productivity and engineering efficiency

• Contributing to the technical direction and architecture of our core products

• Collaborating closely with product, design, and other engineers to deliver high‑quality solutions

What we’re looking for

• Strong full‑stack development skills

• Solid experience with Node.js or C#/.NET on the backend

• Experience with TypeScript and React

• AI‑native mindset: actively using AI tools to accelerate development, improve code quality, and rethink traditional engineering workflows.

• Experience with Docker and cloud environments

• Strong communication skills and a proactive attitude

• Fluent in English, written and spoken

Nice to have

• Experience designing scalable software architectures

• Knowledge of secure software design/cybersecurity

About QOCO

We are a fast‑growing company building next‑generation SaaS solutions for the aviation industry. Our mission is to help airline and MRO organizations unlock the full potential of their data to optimize operations and reduce aircraft downtime.

We’re proud of our collaborative culture, international crew, and real impact on aviation worldwide. Fun fact: we’ve more than doubled our team size from 25 to over 65 employees between 2021 and 2025, and we now have over 15 nationalities in the crew.

At QOCO, you’ll enjoy

• Real ownership and impact in your work

• An experienced, collaborative, and international development team

• Opportunity to grow as the company grows

• Scale‑up energy with global customers

• Good performance recognized and rewarded

• Flexible hours and hybrid work model

• Great benefits: lunch & sport perks, occupational healthcare, and free breakfast at the office

If you're excited about AI-native software development, meaningful technology, and working with a talented team solving real problems in aviation, we’d love to hear from you.

Join us and help shape the future of aviation.