Solaris Group Security Engineer interview questions & guide 2026

Our interview process is designed to uncover your technical depth, your ability to reason through complex security trade-offs, and your alignment with our engineering culture. While specific questions may vary based on whether you are interviewing for a Cyber Security Engineer or Staff Engineer role, the following categories represent the core areas of focus.

Technical Domain Expertise

These questions assess your foundational knowledge of security principles, tools, and methodologies relevant to your specific track (Cloud vs. AppSec vs. Vulnerability Management).

• How would you secure an S3 bucket containing sensitive financial data to prevent unauthorized access?
• Explain the process of performing a threat model on a new microservice architecture.

Preparation for Solaris Group should focus on bridging the gap between theoretical knowledge and practical application. Do not simply memorize definitions; focus on your ability to explain the "why" behind your technical decisions.

Technical Competency – We expect you to demonstrate deep expertise in your chosen domain, whether that is AWS cloud native security or application-level vulnerability remediation. Be prepared to discuss specific tools and frameworks you have mastered.

Problem-Solving & Structural Thinking – When presented with a design challenge, we evaluate your ability to break down complex problems into manageable components. Show us how you identify trade-offs between security, performance, and user experience.

Influence & Communication – Security is a team sport at Solaris Group. You will be evaluated on your ability to explain complex security risks to developers, product managers, and leadership, ensuring that security is a shared responsibility across the organization.

The Solaris Group interview process is rigorous, structured, and collaborative. We aim to provide a comprehensive view of your skills while giving you ample opportunity to learn about our team, our technology stack, and our mission. You can expect a progression that typically starts with a high-level screen followed by deep-dive technical sessions and a final round focused on team fit and leadership.

The pace is fast, reflecting the dynamic nature of the fintech industry. We value candidates who are transparent, data-driven, and curious. Our interviewers look for individuals who can think critically under pressure and who demonstrate a genuine passion for solving complex security puzzles.

This timeline provides a high-level view of your journey from the initial screening to the final decision. Candidates should use this as a roadmap to manage their preparation energy, ensuring they are well-rested for the intensive technical rounds while remaining ready to articulate their past experiences during behavioral assessments.

Cloud Security (AWS)

This area is critical for our Cyber Security Staff Engineer roles. We evaluate your knowledge of identity management, network security, and automated governance.

Be ready to go over:

• IAM Policies – Understanding least privilege and the nuances of cross-account access.
• VPC & Network Security – Implementing security groups, NACLs, and transit gateways.

As a Security Engineer at Solaris Group, you will act as a bridge between the security team and the engineering squads. Your primary responsibility is to ensure that our platform remains resilient against evolving threats while enabling engineers to ship features quickly and safely.

You will drive initiatives related to vulnerability management, proactively identifying and remediating weaknesses across our infrastructure. You will also lead efforts in cloud security, specifically hardening our AWS environments through automation and policy enforcement. Collaboration is essential; you will regularly work with DevOps and Product teams to perform threat modeling and ensure that security controls are seamlessly integrated into our deployment pipelines.

We seek candidates who combine technical depth with a pragmatic approach to security.

• Must-have skills:

• Deep experience in AWS cloud security or modern Application Security practices.

• Proficiency in at least one scripting language (Python, Go, or Bash) for automation.

• Strong understanding of common security frameworks and compliance standards.

• Demonstrated experience in vulnerability management and incident response.

• Nice-to-have skills:

• Experience with Kubernetes container security.

• Background in the fintech or highly regulated financial services industry.

• Contributions to open-source security projects or bug bounty programs.

Q: How difficult are the technical interviews? A: The interviews are designed to be challenging but fair. They focus on real-world scenarios you would encounter in the role rather than obscure trivia; if you are comfortable with your daily technical work, you are well-prepared.

Q: How much time should I spend preparing? A: Most successful candidates spend 1–2 weeks of focused review. Use this time to brush up on your core domain knowledge and practice articulating your past project successes.

Q: What is the culture like at Solaris Group? A: We value autonomy, collaboration, and a bias for action. We look for people who take ownership of their work and are willing to help their teammates solve problems.

Q: Is there a specific format for the coding or design sessions? A: Expect a collaborative, whiteboard-style environment. We want to see your thought process, so talk through your assumptions and decisions as you work.

• Prioritize the "why": When answering technical questions, explain the rationale behind your choice of tools or strategies.
• Be honest about trade-offs: There is no "perfect" security. Acknowledge the business impact of your security recommendations.
• Prepare your stories: Use the STAR method (Situation, Task, Action, Result) to structure your behavioral answers.
• Ask meaningful questions: Use the end of your interviews to ask about team challenges, current security initiatives, or the company’s vision.

The Security Engineer role at Solaris Group is an opportunity to shape the security posture of a fast-growing, innovative financial platform. By focusing on your technical fundamentals, demonstrating a proactive approach to risk management, and effectively communicating your expertise, you will be well-positioned for success. Remember that we are looking for partners in our mission to secure the future of finance.

Candidates can explore additional interview insights, practice questions, and preparation resources on Dataford. We encourage you to use these resources to refine your approach and build confidence before your sessions. We look forward to learning more about your background and how you can contribute to our team.

The compensation data provided above reflects the competitive market range for Security Engineer positions at Solaris Group in Berlin. Candidates should interpret these ranges as total compensation targets that account for experience, specialized domain expertise, and seniority level. During the offer stage, these figures are typically discussed alongside benefits and other performance-based components.