Senior Software Engineer

KnowBe4 empowers the modern workforce to make smarter security decisions every day. Trusted by more than 70,000 organizations worldwide, KnowBe4 is the pioneer of digital workforce security, securing both AI agents and humans. The KnowBe4 Platform provides attack simulation and training, collaboration security, and agent security powered by AIDA (Artificial Intelligence Defense Agents) and a proprietary Risk Score. The platform leverages 15-years of behavioral data to combat advanced threats including social engineering, prompt injection, and shadow AI. By securing humans and agents, KnowBe4 leads the industry in workforce trust and defense.

Please submit your resume in English.

To learn more about our team and office culture in São Paulo, Brazil, visit the following links. 
Careers Page: https://www.knowbe4.com/careers/locations/sao-paulo
Glassdoor: https://www.glassdoor.com/Location/KnowBe4-S%C3%A3o-Paulo-Location-EI_IE969384.0,7_IL[…]M_-C1lsxoZq7Cx8IriVE8MkrzuTmnJzqego77RAWZz9sqGt_55BflwYKpQeg
LinkedIn: https://www.linkedin.com/company/knowbe4/life/brazil/

About the Team

We are seeking a Senior Software Engineer to join one of the engineering teams building KnowBe4's core Security Awareness Training product. This is a full-stack role centered on a Ruby on Rails backend, modern front-end technologies (Vue 3, SvelteKit), and AWS cloud infrastructure.

As a Senior Engineer, you are a strong individual contributor who owns features end-to-end from design through delivery and operation. You'll work alongside other engineers in a fast-paced, agile environment, building and scaling a multi-tenant platform deployed in a fast-paced, agile environment, building and scaling a multi-tenant platform deployed across our AWS regions under rigorous FedRAMP Moderate, SOC 2, and ISO 27001 standards. Our front-end is actively evolving — we're rewriting our micro-frontends (MFEs) to Vue 3 — so you'll both work in our current SvelteKit codebase and help build the Vue 3 future. You lead through high-quality code, sound technical judgment, and by raising the bar for the engineers around you.

What You'll Build

• Full-stack product features — Ruby on Rails APIs, GraphQL endpoints, and Vue 3 / SvelteKit + TypeScript front-ends that ship real value to a global customer base
• The Vue 3 front-end — contributing to the rewrite of our micro-frontends (MFEs) onto Vue 3, while maintaining and evolving the existing SvelteKit application
• GraphQL APIs — schema design, batch loading, and query complexity management for high-traffic, multi-tenant access patterns
• Event-driven services — EventBridge/SQS-based communication between microservices, with an emphasis on idempotency and reliable asynchronous processing
• Serverless background processing — contributing to and optimizing our Lambda-backed worker framework (400+ workers) that powers the product's async workload
• Multi-tenant data layers — working across MySQL, PostgreSQL, DynamoDB, and Redis while maintaining strict tenant isolation and compliance guarantees
• Infrastructure-as-Code — Terraform modules and GitLab CI/CD pipelines that provision and deploy services across multiple environments and regions

Education and Experience

• BS or equivalent plus 5 years of experience
• MS or equivalent plus 3 years of experience
• Ph.D. or equivalent plus 2 years of experience

Essential Responsibilities

• Develops software using the KnowBe4 Software Development Lifecycle and Agile methodologies
• Designs and delivers features end to end, with limited supervision
• Solves complex technical problems and contributes to design discussions
• Writes rigorous code reviews and provides technical guidance to less-experienced engineers
• Collaborates with Product and other engineering teams to deliver against the roadmap
• Helps maintain the quality, reliability, and compliance posture of the systems they own

Technical Requirements

Required

• Backend & Systems - Solid production experience with Ruby on Rails; comfortable with GraphQL and relational databases design/tuning (MySQL/PostgreSQL) in multi-tenant systems
• Frontend - Proficiency with a modern component framework and strict TypeScript; Vue 3 experience is preferred given our MFE direction, and SvelteKit experience is highly valued for our current codebase (React experience also translates well); familiarity with Vite and Tailwind CSS
• Cloud - Hands-on experience with AWS (ECS/Fargate, Lambda, EventBridge, SQS, S3); working knowledge of Terraform and GitLab CI/CD
• Distributed Systems - Understanding of event-driven patterns and asynchronous processing; awareness of eventual consistency and idempotency tradeoffs
• Quality & Collaboration - Writes well-tested, maintainable code; participates constructively in code review and design discussions; communicates clearly in writing
• AI-assisted development - Comfortable using modern AI coding tools (e.g., Claude / Claude Code) to accelerate delivery, review, and problem-solving; we actively embrace these tools and value engineers who use them thoughtfully to raise both speed and quality

Preferred / Nice-to-Have

• Experience leading or contributing to a front-end framework migration
• Experience scaling production Rails applications under real traffic
• Exposure to serverless background-processing frameworks at scale
• DynamoDB / Redis data modeling for high-throughput workloads
• Familiarity with compliance-regulated environments (FedRAMP, SOC 2, ISO 27001)
• Practical experience integrating AI tooling into day-to-day engineering workflows (code generation, review, test scaffolding, automation)

Our Fantastic Benefits

We offer company-wide bonuses based on monthly sales targets, employee referral bonuses, adoption assistance, tuition reimbursement, certification reimbursement, and certification completion bonuses - all in a modern, high-tech, and fun work environment. For more details about our benefits in each office location, please visit www.knowbe4.com/careers/benefits.

Note: An applicant assessment and background check may be part of your hiring procedure.

Individuals seeking employment at KnowBe4 are considered without prejudice to race, color, religion, national origin, age, sex, marital status, ancestry, physical or mental disability, veteran status, gender identity, sexual orientation or any other characteristic protected under applicable federal, state, or local law. If you require reasonable accommodation in completing this application, interviewing, completing any pre-employment testing, or otherwise participating in the employee selection process, please visit www.knowbe4.com/careers/request-accommodation.

No recruitment agencies, please.