---
title: 'Principal Software Architect at Testlio'
canonical: 'https://feeny.ai/job/principal-software-architect-testlio-americas-1e418w5xjjxb'
type: 'job'
last_seen: '2026-09-06'
---

# Principal Software Architect at Testlio

- **Company:** Testlio
- **Location:** Americas
- **Work type:** remote
- **Posted:** 2026-06-23
- **Last confirmed live:** 2026-09-06
- **Apply:** https://job-boards.greenhouse.io/testlio/jobs/8024079

## Job description

Principal Software Architect

Location: This is a 100% remote role open to those who reside in the Eastern half of the United States

## About the job

Testlio’s fully managed crowdsourced testing platform, powered by our proprietary intelligence technology - LeoAI Engine™, 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[testlio.com](https://testlio.com/).

We are hiring a Principal Architect to serve as a hands-on individual contributor who will shape our application and platform architecture, driving production-ready systems that directly enable our next generation of intelligent, distributed software testing solutions.

Why will you love this job?

- High Ownership and Autonomy: Be a foundational technical leader steering a profound platform transformation, making critical structural decisions that balance immediate system delivery with long-term enterprise scalability.
- Pragmatic AI & System Innovation: Step past the hype to integrate actionable AI capabilities directly into high-throughput surfaces, modernizing our core monolith into a robust distributed network alongside our product and executive leaders.

Why will you love being a part of Testlio?

- Great Culture: Testlio is a female-founded company, and half of 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.
- 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?

- Architect, develop, and deploy scalable, production-grade services directly across the core Testlio software platform.
- Author clear architectural standards and reference patterns that define domain boundaries, decoupling our current codebase into modular services.
- Partner with the Director of Engineering to execute frontend framework consolidation, improving operational performance and observability.
- Safeguard system efficiency and regulatory posture by designing with security, cost-efficiency, and ISO 27001 expectations at the center.
- Integrate secure AI/LLM patterns into customer-facing surfaces, establishing strict operational guardrails and failure modes for our Quality API.
- Advise executive, product, and engineering teams on major technical tradeoffs, translating business needs into clean technical strategies.

What do you need to succeed?

Technical Skills

- 15+ years of hands-on software development experience building cloud-native, business-critical platforms.
- Advanced mastery of distributed system patterns, data modeling, event-driven design, and database technologies (Relational and NoSQL).
- Proven track record designing and migrating application infrastructures, specifically moving from monolithic architectures to modular services.
- Deep experience establishing enterprise-ready patterns in AWS, emphasizing high availability, cost optimization, and secure infrastructure.
- Strong familiarity with modern full-stack code environments, including front-end web frameworks, scripting languages, and CI/CD pipelines.
- Practical, production-grade experience deploying AI/ML or LLM-based solutions with an emphasis on observable, safe automation patterns.

Human Skills

- Fluency in English with exceptional written and verbal communication skills, especially when presenting advanced architecture concepts to business leaders.
- Ability to operate effectively as an individual contributor in fast-paced, ambiguous environments, showing proactive problem ownership.
- Strong collaboration and alignment focus, capable of guiding distributed engineering teams and technical peers without direct authority.
- Outstanding analytical thinking, balancing a broad long-term technology vision with practical, short-term implementation constraints.
- Natural inclination for remote-first work, successfully communicating and documenting technical decisions asynchronously across global time zones.

What is the application process?

At Testlio, we aim to hire individuals who are excited about their role, thrive in a fully remote environment, and have strong long-term potential with our team. Because we are a fully distributed company, our interview process includes conversations with several team members so you can get a well-rounded understanding of the role, the people you’ll work with, and how we collaborate. As a result, our interview process typically takes 3–4 weeks to complete.

Interview Process:

- Application
- Recruiter interview
- TestGorilla assessment
- ~ # Team and Stakeholder interviews
- Reference checks
- Offer & background check
- 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 members identify as women. For more information, see the DEI section of our website.

## About Testlio

## Company Overview
- **One-liner**: Testlio operates a fully managed, AI-powered crowdsourced software testing platform that helps brands deliver reliable digital experiences through on-demand global testing expertise.
- **Entity Type**: Private (Bootstrapped/Profitable, not VC-backed beyond early accelerator)
- **Headquarters**: Tallinn, Estonia (Remote-First)
- **Founded**: 2012
- **Founders**: Kristel Kruustük, Marko Kruustük

## Core Business
- **Primary Industry**: Software Testing & Quality Assurance (QA)
- **Target Customers**: B2B; Mid-Market and Enterprise product teams shipping global consumer and business applications (e.g., payments, retail, media, fintech)
- **Mission/Purpose**: Help brands deliver digital experiences that feel reliable, inclusive, intuitive, and worthy of customer trust.

## Products & Services
- **Testlio Platform (powered by LeoAI Engine™)**: A managed crowdsourced testing platform that combines human expertise with machine intelligence to orchestrate testing. Features include AI-powered test case generation, real-time triage, predictive insights, and deep toolchain integrations. It enables sourcing testers, managing runs, and reporting results.
- **Functional Testing**: Ensures core features work as expected across devices, browsers, and environments.
- **Manual & Exploratory Testing**: Deploys vetted, domain-aligned testers to uncover real usability and functional issues at speed.
- **Localization Testing**: Validates translation accuracy, layout, regional behavior, and cultural context with in-market testers.
- **Accessibility Testing**: Confirms accessibility compliance using assistive tools and diverse environments.
- **Payments Testing**: Validates the entire customer buying journey, including functional flow, integrations, usability, and compliance across 800+ payment methods.
- **AI Testing**: Evaluates model outputs, data sets, biases, and hallucinations to make AI features safe and ready for real users.

## Market Standing
- **Valuation**: Not publicly disclosed; company is profitable and has not raised significant venture capital beyond early accelerator rounds.
- **Key Metric**: **Total Funding** – Early-stage only (Techstars accelerator). Company is profitable and self-sustaining. No disclosed annual revenue.
- **Notable Investors/Partners**: Techstars (Austin accelerator, won AngelHack London 2012). Partners include major global brands (many enterprise clients undisclosed).
- **Growth Signals**: 
  - Holds **ISO/IEC 27001:2022** certification for enterprise security.
  - Provides coverage across **600K+ devices**, **800+ payment methods**, **150+ countries**, and **100+ languages**.
  - **100% remote** company with talent in over 150 countries; top-1% applicants accepted globally.
  - Offers a “fully managed” model with dedicated teams, crowdsourced bursts, and nearshore/outsourced options.

## Competitive Advantages
- **Managed, Not Marketplace**: Unlike pure crowdsourcing platforms, Testlio offers a fully managed service with vetted testers, dedicated teams, and end-to-end accountability.
- **LeoAI Engine™**: Proprietary AI layer that optimizes tester matching, workflow automation, and predictive insights, blending human domain expertise with machine intelligence.
- **Global, Real-World Coverage**: Access to 600K+ devices and real-world environments (150 countries, 100+ languages) provides unmatched diversity for testing global products.
- **Enterprise-Grade Security + Transparency**: ISO 27001 certified, with documented test execution, issue tracking, and auditor visibility.

## Strategic Focus
- **Deepening AI Capabilities**: The LeoAI Engine™ is a core strategic asset, used to automate workflow, surface insights, and test AI features themselves.
- **Specialized Vertical Testing**: Payments testing, localization, and accessibility testing represent key growth verticals, especially for fintech and global e-commerce clients.
- **Enterprise Adoption**: All processes are built for scale and compliance, targeting regulated industries like finance and healthcare.
- **Global Freelancer Community**: Continues to expand its vetted, global talent pool of freelance testers, rewarding quality and domain expertise.

## Why Work Here
- **100% Remote-First Culture**: Full-time and freelance teams operate across 150+ countries; no central office requirement.
- **Culture Values (R.O.A.R.)**: Built on **Resilient, Adaptive, Relentless**, and **Relational** principles. Sub-values include "Be Kind," "Give a Damn," "Challenge Forward," and "Foster Inclusion."
- **Employee Well-being**: Full-time employees receive a quarterly well-being stipend and access to optional counseling through Siffi.
- **Social Impact & Sustainability**:
  - Provides **$500 crisis-aid grants** to employees and contractors affected by natural disasters or humanitarian crises.
  - Purchases carbon offsets for travel, supports reforestation via One Tree Planted.
  - Donates to human rights, mental health, and global aid organizations.
- **Global, Diverse Team**: Deliberately embraces cultural, geographical, and cognitive diversity.
- **Career & Freelance Opportunities**: Open roles include QA Analysts, Quality Engineers, Freelance Testers (global), and corporate roles like Program Manager and Recruiting Manager.

## Sources
1. [testlio.com](https://www.testlio.com/) – Official website.
2. [testlio.com](https://www.testlio.com/about-us) – Company overview, leadership, culture, and values.
3. [testlio.com](https://www.testlio.com/careers) – Careers page with culture and culture code.
4. [job-boards.greenhouse.io](https://job-boards.greenhouse.io/testlio) – Active job listings.
5. [linkedin.com](https://www.linkedin.com/company/testlio) – LinkedIn company page.

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