Principal Software Engineer

Location: This is a fully remote position within a globally distributed company. It is open to candidates located in the EMEA or APAC region who wish to work remotely. Preferred locations include Central and Eastern Europe, Asia, the Middle East, and Africa. Due to our compensation strategy, we will not consider applicants from high-cost-of-living areas such as Benelux, DACH, France, Spain, the Nordics, and the UK.

About the job

Testlio’s fully managed crowdsourced testing platform integrates expert, on-demand testers directly into your release process. Ship faster and more confidently with global coverage across 600,000+ devices, 800+ payment methods, 150+ countries, and 100+ languages. To learn more, visit www.testlio.com.

We are hiring a Principal Software Engineer to help us deliver solutions that harness data & the latest AI advancements to generate measurable business impacts, ensuring our leadership in quality software testing services.

To accomplish this, we seek a distinguished engineer who can showcase their significant experience in enterprise architecture & full-stack solution engineering. If you can confidently tick one or more of these boxes, we’d love to hear from you:

• I hold a Solutions Architect certification (such as AWS Certified Solutions Architect Professional - CSAP)
• I have a public track record of my contributions and coding expertise, featuring significant contributions to prominent open-source projects.
• I’ve held an Architect role at a leading tech company (FAANG-level), demonstrating my ability to operate at the highest industry levels.
• I have played a pivotal technical role in a startup, leading it from inception to a successful product launch, essentially acting as the lead technical powerhouse of the team.

Why you will love this job

• Shape the future of testing with AI: Be at the forefront of innovation, building solutions that harness the power of AI to automate tasks, generate valuable insights, and drive testing efficiency.
• Make a tangible impact: Your work directly influences the success of our clients and the quality of their digital products. See your contributions translated into real-world improvements that benefit millions of users.

Why you will love being a part of Testlio

• Great Culture: Testlio is a female-founded company, and half our team identifies as women. We’re proud of our inclusive, purpose-driven culture where people genuinely enjoy collaborating. As part of our team (we call ourselves TestLions), you’ll help create exceptional digital experiences for our customers, while also contributing to our freelance network and social impact initiatives like Ignite.
• Remote Work: Our culture is built around remote work. We’ve created systems to allow us to successfully work together asynchronously as a fully remote and globally distributed team. Testlio provides the tools and guidance for everyone to succeed in their careers in a fully remote setting. Our working style encourages everyone to make decisions, communicate effectively, and work at a sustainable pace. 
• Investment in You: Your growth and well-being matter to us. You’ll have flexible paid time off—including national holidays, personal days, and sick days—plus stock options so you can grow with Testlio. We also provide a $300 annual learning stipend to support your personal and professional development.
• Winning Business: Testlio is growing, profitable, and cash-strong. We are leading our industry with exceptional clients who provide us with a high NPS score and a 4.7 rating on G2. Our business model is global, enterprise, and subscription-based. Several of our largest clients have been with us for 7+ years, and many spend $500K+/year with Testlio. 

What would your day look like?

• Lead architectural roadmaps, technical investigations, prototyping, and drive technical decisions needed for impact. Provide quality control for Architectural Decision documents.
• Build and implement performant, scalable, and quality products in an iterative approach.
• Advance AI-augmented software engineering practices by incorporating productivity-boosting GenAI automation across the software development lifecycle.
• Define & advocate quality standards for code, coaching your fellow engineers & constantly raising the bar for quality.
• Work closely with designers and business stakeholders to bring the best solutions to end users. 
• Lead debugging and root cause analysis of complex problems, and offer solutions. 
• Work in a team environment: contribute to tasks and goals; follow team processes (Scrum) and rituals.
• Help and mentor other team members, proactively share and document knowledge.

What do you need to succeed?

Technical Skills

• A university degree in Computer Science, Software Engineering, or equivalent.
• 10 - 15 years of full-stack coding experience, building modern cloud-native applications.
• Strong affinity with our tech stack of React, TypeScript, NodeJS, GraphQL, PHP, MySQL, AWS, and Kafka.
• In-depth knowledge of core browser concepts and responsive web design.
• Practical knowledge of modern API architecture, microservices, and event-driven design.
• Experience in writing automated tests is a strong plus.
• Proven track record of taking ownership, conducting technical design, and successfully delivering results.
• AI/ML experience is a strong plus.
• Mobile Development: Experience in developing and optimizing mobile applications (whether using fully native frameworks for iOS/Android or cross-platform solutions such as React Native) is a plus.

Human Skills

• Fluency in English, with excellent written and verbal communication skills.
• Organized and thorough with a commitment to quality.
• Results-oriented, with data-driven decision-making and a focus on delivering impactful outcomes.
• Strong preference for a remote working environment.
• A passion for staying current with the latest industry trends and technologies, and a drive to continuously improve and innovate.

What is the Candidate Consideration Process

We do our best to bring on individuals who will be excited about their role and have the potential for a great future with Testlio. Since we are 100% distributed, we’d like you to meet with multiple people from our organization to give you an idea of who you would be working with, your role expectations, etc. Our interview process can take about 4 to 6 weeks to complete. 

• Application
• Technical Exercise 
• Technical Demo with Hiring Manager
• Recruiter interview
• Multipart TestGorilla assessment
• ~ 4 Team and Stakeholder Interviews 
• Reference checks
• Offer and background checks

Diversity and Inclusion

Testlio is an equal-opportunity employer deeply committed to creating an inclusive environment for people of all backgrounds and identities. We are female-founded, and 46% of our team identifies as women. See the DEI section of our website for more information.