Cloud Full Stack Developer

NestAI; Helsinki; On-site; EUR 70,000 - 110,000; Full time

Benefits offered by this job

Occupational healthcare (Mehiläinen)

Epassi Flex benefit

Lunch benefit (tax-free)

Auntie (mental wellbeing services)

Regular team lunches and all-hands

Mac or PC of your choice

Holiday allowance (50% of holiday pay)

Phone benefit

Job summary

NestAI in Helsinki, Finland seeks a Senior Full Stack Engineer to design, build and scale core cloud-based infrastructure and web applications powering NestOS. You will work with React, Node.js, and major cloud platforms (GCP/Azure/AWS) across cloud and on-prem deployments, collaborating with security, platform, and AI research teams to deliver scalable, secure solutions for mission-critical operations.

Join a European defence-focused lab with sovereign European control and engineering

Qualifications

• Deep experience in full stack software development (minimum 5 years).
• Understanding of cloud infrastructure and DevOps practices.
• Strong Linux and database management skills.
• Attention to detail with strong problem-solving abilities.
• Nice to have experience in platform engineering or AI data pipelines.

Responsibilities

• Design, development, testing, deployment, and debugging of web applications.
• Building and operating backend services, APIs, and databases.
• Managing and optimizing cloud environments and production deployments.
• DevOps practices: Kubernetes, Docker, Terraform, CI/CD, and observability.
• Collaborating in agile teams to deliver high-quality solutions.
• Interfacing with stakeholders to deploy tailored FDE solutions.

Skills

Full stack development

Cloud infrastructure

DevOps

Linux environments

Databases

Security basics

Problem solving

Job description

Company

NestAI is a European AI lab for defence delivering the adaptive operating system for modern battlefield operations. We develop adaptive intelligence for unmanned and command systems: AI that continuously learns from operational data and adapts to changing conditions.

NestOS is our open, modular and interoperable platform that enables this at scale and keeps capability evolution under sovereign European control. Founded in 2025 by Peter Sarlin, whose previous company Silo AI became Europe's largest AI acquisition, NestAI brings together over 150 engineers and scientists and partners with leading European defence forces and industry.

Role Description

In this role, you will focus on building, scaling, and maintaining the core cloud-based infrastructure and web applications that power our long-term platform vision. You will work on foundational, mission-critical services that allow NestOS to process high-throughput data, manage distributed fleets, and deliver real-time situational intelligence.

You will collaborate closely with core platform developers, security specialists, and AI researchers to build scalable, secure, and resilient web architectures across cloud and on-premise deployments. You will work with modern web technologies such as React, Node.js, and major cloud platforms (GCP, Azure, or AWS) to build scalable, secure, and efficient solutions.

Day-to-day responsibilities include:

• Design, development, testing, deployment, and debugging of web applications.


• Building and operating backend services, APIs, and databases.


• Managing and optimizing cloud environments and production deployments.


• DevOps practices: Kubernetes, Docker, Terraform, CI/CD, and observability across cloud and on-prem environments.


• Collaborating closely in agile teams to deliver high-quality solutions.


• Interfacing directly with key stakeholders to understand requirements, adapt to diverse technical environments, and deploy tailored solutions for FDE roles.

Qualifications

• Deep experience (minimum of 5 years or equivalent experience) in Full Stack software development


• Knowledge of the full web development stack, cloud infrastructure, and DevOps practices.


• Strong skills in Linux environments and database management.


• Excellent problem-solving abilities and a strong attention to detail.


• Pluses: Practical platform engineering, security expertise (OIDC/OAuth2, Vault, compliance), or experience with AI/ML data pipelines.

Why join NestAI

At NestAI, you’ll build meaningful, real-world technology as part of a world-class team of engineers, scientists, and experienced professionals. You’ll work on systems where reliability genuinely matters, contribute to Europe’s security and resilience, and solve problems that demand depth, trust, and craftsmanship.

If you want to build with purpose — and with leading experts in the field — you’ve come to the right place.

Perks & Benefits

• Occupational healthcare (currently provided by Mehiläinen)


• Epassi Flex benefit (sports, culture, commuting, wellbeing)


• Lunch benefit (25% tax-free coverage)


• Auntie (mental wellbeing services)


• Regular team lunches and all-hands events


• Your choice of Mac or PC


• Holiday allowance (50% of holiday salary)


• Phone benefit according to company policy (subscription and device)

We are continuously developing and expanding our benefits as we grow.

Practicalities

Employment is subject to applicable security screening (including SUPO, where required).

NestAI is an equal opportunity employer. We consider all applicants based on their skills, experience, and potential.

We are currently unable to provide visa sponsorship or international relocation support for this position. Candidates must already be based in Finland or in the EU and have a valid work permit for this region at the time of application.