Principal Software Engineer

Testlio; United States; Remote; USD 120,000 - 180,000; Full time

Job summary

A globally distributed company is looking for a Principal Software Engineer to drive innovation in software testing solutions using data and AI. The role requires extensive experience in full-stack development and enterprise architecture, providing an opportunity to influence quality testing services and improve user experiences across platforms. Join a diverse team committed to inclusivity and effective remote collaboration, enjoying great culture, flexibility, and growth opportunities.

Benefits

Flexible paid time off

$300 annual learning stipend

Stock options

Inclusivity-focused culture

Investment in personal growth and well-being

Qualifications

• 10-15 years of full-stack coding experience.
• Strong familiarity with React, TypeScript, NodeJS.
• Experience in leading architectural design and delivering results.

Responsibilities

• Lead architectural roadmaps and technical investigations.
• Build scalable and quality products using modern tech stacks.
• Advance AI-augmented software engineering practices.

Skills

Enterprise architecture

Full-stack development

Cloud-native applications

Microservices architecture

AI/ML

Education

University degree in Computer Science

Tools

React

NodeJS

GraphQL

AWS

Kafka

PHP

MySQL

Job description

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, visitwww.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.
• 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
• ~ 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.

Apply for this job

*

indicates a required field

First Name *

Last Name *

Email *

Phone

Location (City) *

Resume/CV *

Enter manually

Accepted file types: pdf, doc, docx, txt, rtf

LinkedIn Profile *

This is a 100% remote role for anyone based in EMEA. Please share your location and timezone. *

Please indicate which of the following best describes your experience and qualifications. *

How many years of experience do you have as a full-stack developer? * Select...

Describe your best experience of microservices-architecture & best use of architectural design patterns that you’re intimately familiar with *

Do you have experience working on a complex mobile app project? If you have experience with fully native (iOS/Android) or React Native development, we’d love to hear about the technical and architectural challenges you encountered and how you addressed them.

This role is open to those who reside in EMEA or APAC. As an ongoing contractor, you would receive all local national holidays in your country as paid holidays, 5 sick days a year, and 24 days of paid time off. You will receive stock options as well as an education budget for learning. As an ongoing contractor, you would be responsible for paying your taxes, pensions, and health insurance. You are paid monthly via Wise in USD. What are your monthly compensation expectations for this role? *

If you are hired, you must provide proof of eligibility to work from your current country and proof of identity. Would you be willing to proceed with the application and interviewing process and provide this proof if you are hired? * Select...

General Demographic Questions

At Testlio, one of our core values is to foster inclusion. We wish to create an environment where people of different identities and backgrounds can thrive. The following demographic questions are voluntary and intended to help us learn about candidates applying to Testlio.

Please know your survey responses are anonymous and secure. The responses given will not be visible to hiring decision-makers and will have no impact on your opportunity to work for us. The data collected will only be used in an aggregated way to describe our candidate pool.

If you don't feel comfortable answering any or all of the questions below you can select 'I don't wish to answer'.

What age group do you belong to? * Select...

What gender do you most closely identify with? * Select...

Do you identify as transgender? * Select...

What sexual orientation do you most closely identify with? * Select...

Which race or ethnicity best describes you? * Select...

Do you live with a disability? (Disability covers mental and physical health impairments or conditions, including things like anxiety, visual or hearing impairments, and long-term health conditions) * Select...