At Bixal, a Software Engineer plays a pivotal role in driving digital transformation and building impactful technology solutions for federal agencies, non-profit organizations, and public sector clients. This position is not just about writing code; it is about creating highly accessible, secure, and scalable web applications that empower citizens and improve access to vital public services. Engineers at Bixal work at the intersection of modern software engineering, user-centric design, and agile delivery to build enterprise-grade platforms that solve complex, real-world problems.

The work primarily centers around robust content management systems, specifically Drupal and WordPress, integrated with modern backend services and cloud infrastructure. As a Software Engineer, you will contribute to high-impact projects that require seamless data migrations, custom module and plugin development, and sophisticated API integrations. Your contributions directly impact how millions of users interact with public-facing websites, ensuring these platforms are responsive, performant, and compliant with federal standards.

To succeed in this role, you must bring a balance of deep technical expertise and strong collaborative skills. Bixal operates in highly collaborative, cross-functional teams where engineers work alongside product managers, UX/UI designers, and client stakeholders. It is an environment that values continuous learning, technical rigor, and a shared commitment to using technology as a force for positive social impact.

To help you prepare effectively, we have compiled representative questions based on real candidate experiences at Bixal. These questions are structured to give you a clear understanding of the core themes and technical patterns you will encounter during the evaluation process.

CMS & Backend Engineering

This category evaluates your deep understanding of enterprise content management systems, PHP development, and database management, which are central to Bixal's technical stack.

• How do you approach building a custom module in Drupal versus a custom plugin in WordPress?
• Walk me through your process for managing complex database migrations from legacy systems into a modern Drupal architecture.

Preparing for an interview at Bixal requires a strategic focus on both your technical depth and your alignment with the company's collaborative delivery model. Interviewers look for candidates who can demonstrate not only how to write code, but why they make specific architectural decisions.

Role-Related Knowledge – You must demonstrate a highly specialized understanding of WordPress and Drupal ecosystem development. This includes custom API integrations, theme customization, security best practices, and database optimization. Be ready to discuss the specific hooks, filters, and architectural patterns you use to build scalable solutions.

Problem-Solving Ability – Interviewers want to see how you approach ambiguity and structure your technical solutions. When presented with a coding challenge or architectural scenario, focus on explaining your thought process clearly, identifying potential edge cases, and discussing trade-offs between speed, security, and maintainability.

Culture Fit & Alignment – Because Bixal supports public sector and mission-driven clients, showcasing an appreciation for accessibility, user-centric design, and collaborative problem-solving is critical. Emphasize your experience working in agile environments and your ability to communicate complex technical concepts to non-technical team members.

The interview process at Bixal is designed to evaluate your technical capabilities, alignment with the role's day-to-day responsibilities, and cultural fit within the engineering organization. The process typically moves through three distinct phases, ensuring a comprehensive evaluation from both a technical and cultural perspective.

The journey begins with an initial screening by a recruiter, focusing on your overall background, career goals, and foundational qualifications. Successful candidates then progress to a hiring manager interview, which dives deeper into the role's specific expectations, your past project experiences, and your alignment with Bixal’s core values. The final stage is a technical team interview, where you will engage directly with prospective engineering peers to discuss technical requirements, problem-solving methodologies, and hands-on coding.

The timeline above outlines the standard progression of stages you will navigate during the Bixal hiring process. Candidates should use this timeline to pace their preparation, ensuring they allocate sufficient time to practice core coding challenges prior to reaching the final technical stage. While the exact duration can vary based on team availability, most candidates complete the process within three to four weeks.

To excel in the Bixal interview process, you must understand the specific competencies that interviewers focus on during each technical evaluation.

CMS Architecture & Development

This area focuses on your ability to build enterprise-grade web applications using Drupal and WordPress. You will be evaluated on your understanding of modern CMS development patterns, database structures, and configuration management.

Be ready to go over:

• Custom Module & Plugin Development – How to write clean, object-oriented PHP code that extends CMS functionality without modifying core files.
• Database Schema & Migrations – Best practices for structuring database tables, optimizing queries, and executing data migrations safely.
• Configuration Management – Managing configuration-as-code across local, staging, and production environments.
• Advanced concepts (less common) – Headless CMS architecture, decoupling Drupal or WordPress with modern frontend frameworks like React or Next.js, and implementing custom Drush commands.

Example scenarios:

• Designing a custom Drupal migration pathway to import thousands of legacy articles while preserving taxonomy relationships and metadata.
• Debugging a performance bottleneck caused by database transient queries in a highly customized WordPress multisite network.

Coding & Technical Problem Solving

This evaluation area tests your core engineering skills, algorithmic thinking, and ability to write clean, secure code under pressure.

Be ready to go over:

• Object-Oriented PHP – Demonstrating clean code principles, design patterns, and proper error handling.
• API Integration & Creation – Consuming third-party services, handling asynchronous requests, and building secure REST endpoints.
• Performance Optimization – Profiling code, identifying memory leaks, and implementing efficient caching strategies.
• Advanced concepts (less common) – Writing custom middleware, optimizing background processing queues, and configuring continuous integration (CI/CD) pipelines.

Example scenarios:

• Writing a PHP script to securely parse an external XML feed, validate the data schema, and update custom post types programmatically.
• Refactoring a legacy code block to improve execution time and reduce memory overhead during large-scale data processing.

Accessibility & Modern Web Standards

Given Bixal's commitment to public sector clients, building inclusive digital products is a core requirement of every engineering project.