Senior Backend Engineer (Node.js/TypeScript, AWS)

CUJO AI®; Espoo; Hybrid; EUR 56,000 - 78,000; Full time

Benefits offered by this job

Flexible work options

AWS cert bonuses

Annual bonuses

Health insurance

Team events

Referral rewards

Job summary

CUJO AI is seeking a Senior Software Engineer in Espoo to design and build cloud-native services using TypeScript/Node.js on AWS serverless stacks. You will create secure, scalable backends for the OTM product and integrate with CUJO AI platforms, while owning IaC and CI/CD pipelines.

You will mentor engineers and collaborate across international teams. Ideal candidates bring hands-on TypeScript/Node.js experience, AWS services expertise, and a security-first mindset, with fluent English and

Qualifications

• Strong hands-on TypeScript and Node.js development experience.
• Experience building cloud-native services on AWS serverless architecture.
• Experience with OAuth2.0/OpenID Connect and secure authentication flows.
• Proven track record in CI/CD pipelines and test automation.
• Fluent English; ability to work in Agile teams.

Responsibilities

• Design and build cloud-native services on AWS serverless stack.
• Develop RESTful APIs and backend services around OTM functionality, integrating with CUJO AI platforms.
• 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

OAuth2/OpenID Connect

CI/CD

Security-minded

English

Tools

Lambda

API Gateway

Cognito

DynamoDB

CloudFront

MSK

AWS CDK

GitHub Actions

Jenkins

Job description

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

We'relookingfor aSenior Software Engineerwithproven experiencein programming usingTypeScript/Node.jsonAWS serverlessservices,to build secure, scalable services that mobile apps and network service providers rely on worldwide.

In This Role, You Will:

• Design and buildcloud-native serviceson AWS serverless architectureusingLambda, API Gateway, Cognito, AWS CDK, DynamoDB, CloudFront, MSK, andmore.
• Build RESTful APIstodevelop backend services around OTM productfunctionality,integrate with existing CUJO AI platforms— all using Node.js/TypeScript.
• Owninfrastructure-as-codeand CI/CD pipelines (Jenkins, GitHub Actions).
• Monitor, troubleshoot, andoptimizesystems forreliability at scale.
• Mentor engineers and collaborate across distributed, multinational teams.

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

We'relookingfor aSenior Software Engineerwithproven experiencein programming usingTypeScript/Node.jsonAWS serverlessservices,to build secure, scalable services that mobile apps and network service providers rely on worldwide.

In This Role, You Will:

• Design and buildcloud-native serviceson AWS serverless architectureusingLambda, API Gateway, Cognito, AWS CDK, DynamoDB, CloudFront, MSK, andmore.
• Build RESTful APIstodevelop backend services around OTM productfunctionality,integrate with existing CUJO AI platforms— all using Node.js/TypeScript.
• Owninfrastructure-as-codeand CI/CD pipelines (Jenkins, GitHub Actions).
• Monitor, troubleshoot, andoptimizesystems forreliability at scale.
• Mentor engineers and collaborate across distributed, multinational teams.

Requirements:

What We’re Looking For:

• Strong hands-on experience withTypeScriptandNode.js.
• Experience withAWSservices.
• Experience withOAuth2.0 / OpenID Connectand secure authentication flows.
• Track recordof 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 withAWSservices and workloads at scale.
• Strong architectural documentation and system design skills.
• Knowledge ofVPN technologies(OpenVPN,WireGuardserver 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 insuranceand 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.