Senior Full-Stack Web Developer

We’re looking for a Senior Full-Stack Web Developer to join our strong product development team. From day one, edge computing, cloud services, ML algorithms, and LLM-based capabilities have been core to our product, enabling fully autonomous parking operations with minimal manual work. In this role, you’ll be a key player in designing and building a scalable platform that removes human involvement from end-to-end operations.

Our product is not just your standard crud-application, so we expect technical proficiency and ideally experience from something similarly demanding.

Our product

Our solution is a robust, interconnected system spanning from the edge (parking facilities) to the cloud. You’ll work across key components, with a particular focus on our web application running on edge devices and our cloud application.

You’ll work closely with the team to take complex features from concept to production, contributing across frontend, backend, and infrastructure.

Tech stack

  • Backend: TypeScript, Node.js, PostgreSQL, Express, Knex, Jest

  • Frontend: TypeScript, React

  • Infrastructure: AWS managed with Terraform (RDS, Lambda, API Gateway, IoT Greengrass, etc.)

What we’re looking for

Core experience

Usually, to be successful in this role, we've noticed it's good to have a minimum of 5 years of relevant hands-on experience with the core technologies listed above and can clearly demonstrate that you’ve:

  • Designed and built modern web applications from scratch (not just maintained existing systems)

  • Taken responsibility for architecture and key technical decisions in production systems

  • Delivered high-quality software that is used in real-world, business-critical environments

Skills

  • Senior-level full-stack proficiency with TypeScript/Node.js on the backend and React (or similar) on the frontend

  • Experience designing relational database schemas and writing efficient PostgreSQL queries, with a good understanding of performance in web applications

  • Strong experience with integrations: designing and implementing well-structured HTTP APIs and maintaining external integrations

  • Ability to write clean, well-tested, production-ready code

  • Excellent communication skills. English required, Finnish is a plus

Bonus points

  • Familiarity with AWS serverless services, or strong motivation to deepen your cloud expertise

  • Experience with Infrastructure-as-Code, especially Terraform

  • Experience or strong interest in UI/UX

Mindset

  • You take ownership and are comfortable being responsible for end-to-end outcomes

  • You want to work with very strong engineers and enjoy high expectations, high autonomy, and high trust

  • You think beyond the immediate task and care about scalability, security, maintainability, and long-term product quality

  • You are comfortable in an autonomous, cross-functional team and contribute wherever needed

About 6sense Innovations

6sense Innovations is a tech company disrupting the parking operations market by making operations fully autonomous. We are a ~15-person ambitious and dedicated team, and our customers and users mean everything to us.

Our culture is relaxed, respectful and technically demanding. We operate with:

  • Very high expertise and expectations of ourselves and each other

  • Flat hierarchy, strong ownership, and real responsibility

  • A proven, winning product and business model, rapidly capturing market share from traditional players

If you want to work in a team where the bar is high, the impact is real, and the technology is modern and challenging, we’d love to hear from you.

Compensation

Gross monthly salary in this role is typically in the range of 4,000–5,000€ depending on experience and fit.

How to apply

Send a short, informal application with your salary expectations, plus your CV, to talent@6si.ai.