Senior Software Engineer (Node.js/TypeScript)

CUJO AI®; Espoo; Hybrid; EUR 55,800 - 78,120; Full time

Benefits offered by this job

Flexible work

Learning & certifications

Annual bonus

Health insurance

Referral rewards

Job summary

CUJO AI in Finland is seeking a Senior Software Engineer to design and build cloud-native services on AWS serverless architecture using Lambda, API Gateway, Cognito and DynamoDB. You will develop RESTful APIs with Node.js/TypeScript and integrate with CUJO AI platforms.

You will own infrastructure-as-code and CI/CD pipelines with Jenkins and GitHub Actions, monitor reliability at scale, and mentor engineers across distributed teams. Fluent English and security-first mindset required.

Qualifications

• Strong hands-on experience with TypeScript and Node.js.
• Experience with AWS services and secure authentication flows (OAuth2/OpenID Connect).
• Experience building CI/CD pipelines and driving test automation.
• Security-first mindset and Agile teamwork.

Responsibilities

• Design and build cloud-native services on AWS serverless architecture using Lambda, API Gateway, Cognito, AWS CDK, DynamoDB, CloudFront, MSK, and more.
• Build RESTful APIs to develop backend services around OTM product functionality, integrate with existing CUJO AI platforms — all using Node.js/TypeScript.
• Own infrastructure-as-code and CI/CD pipelines (Jenkins, GitHub Actions).
• Monitor, troubleshoot, and optimize systems for reliability at scale.
• Mentor engineers and collaborate across distributed, multinational teams.

Skills

TypeScript

Node.js

AWS services

OAuth2

OpenID Connect

CI/CD pipelines

Test automation

Security mindset

Agile teamwork

Fluent English

Tools

Jenkins

GitHub Actions

AWS CDK

Job description

Your code will protect millions of devices. At CUJO AI, our OTM (OnTheMove) team builds Android and iOS apps backed by a cloud platform deployed on AWS — delivering cybersecurity and parental control features to users on the go.

We’re looking for a Senior Software Engineer with proven experience in programming using TypeScript/Node.json and AWS serverless services, to build secure, scalable services that mobile apps and network service providers rely on worldwide.

In This Role, You Will:

• Design and build cloud-native services on AWS serverless architecture using Lambda, API Gateway, Cognito, AWS CDK, DynamoDB, CloudFront, MSK, and more.
• Build RESTful APIs to develop backend services around OTM product functionality, integrate with existing CUJO AI platforms — all using Node.js/TypeScript.
• Own infrastructure-as-code and CI/CD pipelines (Jenkins, GitHub Actions).
• Monitor, troubleshoot, and optimize systems for reliability at scale.
• Mentor engineers and collaborate across distributed, multinational teams.

What We’re Looking For:

• Strong hands‑on experience with TypeScript and Node.js.
• Experience with AWS services.
• Experience with OAuth2.0 / OpenID Connect and secure authentication flows.
• Track record of building CI/CD pipelines and driving test automation.
• A security‑first mindset and comfort working in Agile teams.
• Fluent English.

What Will Make You Stand Out:

• Deep experience with AWS services and workloads at scale.
• Strong architectural documentation and system design skills.
• Knowledge of VPN technologies (OpenVPN, WireGuard server management and extensions) and networking fundamentals.
• Familiarity with AI‑assisted dev tools (Claude, GitHub Copilot, Cursor AI).
• Willingness to pick up other programming languages as needed (Java, Kotlin, Python, Go).
• Android/iOS development experience.

Why Join CUJO AI?

• Flexible work — fully remote or hybrid, your call.
• Learning & certifications — access to online training platforms (Udemy, Pluralsight, and more) plus bonuses for passed AWS certifications.
• Annual performance bonuses.
• Health insurance and comprehensive benefits.
• Team gatherings — annual company events and activities.
• Referral rewards — up to €1,000 per successful hire.

The compensation package ranges from 5,000 to 7,000 EUR (gross), depending on your experience. We are focused on finding the right person for this role and are open to discussing salary expectations based on your skills, competencies, and experience.

Apply by July 19, 2026 – but don’t wait! We’ll hire as soon as we find the right person.

Apply via our recruitment portal. Questions? Email us at [e-mail].