Senior Backend / Cloud Developer (Python, AWS)

Cloud Protection by WithSecure; Helsinki; Hybrid; EUR 55,000 - 67,000; Full time

Benefits offered by this job

Flexible work

Work abroad 30 days

Paid sick leave

Mental health support

Comprehensive benefits

Learning opportunities

Job summary

Cloud Protection by WithSecure is seeking an experienced engineer to join our Security Core team. You will design and operate Python services running on AWS, build detection pipelines for malware, phishing, and identity-based attacks, and contribute to scalable, observable production systems.

You will work across the full lifecycle from design to production, applying AI-assisted tools with judicious validation.

Qualifications

• Strong fundamentals in system design and distributed systems.
• Proven ability to design cloud architectures on AWS.
• Hands-on experience building production services on AWS.
• Fluency with AI-assisted development and validation.
• Confident Python backend development.

Responsibilities

• Design, build, and operate the Python services that make up Security Core on AWS.
• Build and evolve the detection pipelines for malware, phishing, and identity-based attacks.
• Implement metrics and observability for production performance.
• Drive architecture decisions on scalability, reliability, security, and cost.
• Own infrastructure as code and delivery of production environments.
• Build internal tooling for threat analysts.
• Collaborate with Salesforce app and threat intelligence teams.

Skills

System design

Distributed systems

AWS cloud architecture

Python backend

AI-assisted development

English fluency

Communication

Tools

AWS

Job description

Job Description

Cloud Protection protects Fortune 500 enterprises and government organizations worldwide from malware, phishing, and identity-based attacks in Salesforce. Our work builds on more than 30 years of experience in analyzing malware and defending against advanced threats - expertise few security companies can match.

• Application Deadline: Nov. 15, 2026
• Hybrid
• Yearly salary: starting from €61,000

Job Description

Cloud Protection protects Fortune 500 enterprises and government organizations worldwide from malware, phishing, and identity-based attacks in Salesforce. Our work builds on more than 30 years of experience in analyzing malware and defending against advanced threats - expertise few security companies can match.

It’s our people who make that possible. We’re a focused team that moves with the speed of a startup and the depth of decades in cybersecurity. We value passion, purpose, and genuine wellbeing at work, and we’re looking for people who want to set the standard for Salesforce security with us.

You’ll join the engineering team building Security Core, the detection platform behind Cloud Protection. It runs in our own AWS environment and analyzes threats in Salesforce, returning the verdicts and intelligence the app enforces as customer policy.

You’ll work across the full lifecycle of the platform: designing and building services, putting them into production, measuring how they perform on real traffic, and operating them for reliability and performance.

We work AI-natively. AI-assisted tools are part of how we explore solutions, write and review code, test, document, and improve how we work, and we expect you to use them with judgment, validating what they produce rather than taking it on trust.

Key Responsibilities

• Design, build, and operate the Python services that make up Security Core on AWS
• Build and evolve the detection pipelines that detect malware, phishing, and identity-based attacks
• Implement the metrics and observability that show detection quality, latency, and availability in production
• Drive architecture decisions on scalability, reliability, security, and cost
• Own infrastructure as code and the delivery of production environments
• Build internal tooling for threat analysts
• Work closely with the Salesforce app and threat intelligence teams

What are we looking for?

• Deep engineering fundamentals: solid professional experience in system design, distributed systems, concurrency, and API design. We care more about reasoning from first principles than about familiarity with any particular framework
• Proven ability to design cloud architecture on AWS: choosing the right services and making the trade-offs between scalability, reliability, security, and cost
• Hands-on experience building and operating production services on AWS, including infrastructure as code
• Fluency with AI-assisted development as a daily way of working, backed by the engineering judgment to direct it well and validate what it produces
• Confident Python backend development
• A practical, well-grounded approach to software testing
• Clear communication and the ability to collaborate across engineering, threat intelligence, and product
• Fluent English

A cybersecurity background is a plus, not a requirement.

The salary displayed on this page represents the starting point for the role. Final compensation is discussed individually and depends on experience, skills, and the local market.

What Will You Get From Us

• Meaningful work with real-world impact - your work helps protect businesses and critical infrastructure from modern cyber threats.
• Flexible ways of working, including up to 30 days per year working abroad and paid sick leave from day one.
• A strong focus on well-being, with mental health support and comprehensive benefits.
• Continuous learning, modern tools, and a people-first culture that values trust and collaboration.