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Polska
Remote only
Join ABC Fitness and become part of a culture that’s as ambitious as it is authentic. Let’s transform the future of fitness—together!
Our Values
Best Life
We believe great work begins with great people. That’s why our culture is built on respect, trust, and belonging. We create an inclusive environment where every team member can bring their authentic self to work—because diverse perspectives drive innovation and meaningful impact.
Growth Mindset
We are doers, thinkers, and dreamers. At ABC Fitness, your growth is our investment. Through continuous learning, mentorship, and professional development opportunities, we empower you to reach new heights—personally and professionally.
One Team
From day one, you’ll be part of a team that collaborates, celebrates, and cares. We move fast, support one another, and have fun along the way. Because when you thrive, we all thrive.
INTRODUCTION
ABC Fitness is building an intelligent platform for the fitness industry, with AI embedded into the products, workflows, and decision points our customers rely on every day. Our strategy is focused on using AI to automate routine work, personalize experiences, surface actionable insights, and help operators move from reactive management to proactive, data-informed execution. We are investing in the platform, data, and product capabilities required to deliver secure, scalable AI experiences that improve efficiency, strengthen engagement, and drive better business outcomes.
As a Principal Site Reliability Engineer, you will serve as a senior individual contributor and technical leader for this platform. You will architect and evolve the reliability, execution, and validation layers that make AI-assisted and automated engineering safe at scale. This includes defining platform standards, building paved paths for teams, and partnering across Engineering, Security, and Platform to ensure systems are reliable, observable, and production-ready by default.
This is a hands-on platform engineering role for someone who combines deep distributed systems expertise with a strong reliability mindset and experience operating modern, high-scale infrastructure.
WHAT YOU'LL DO:
Architect and evolve core platform capabilities for reliability, including execution environments, CI/CD systems, and validation pipelines that support high-throughput, machine-assisted change.
Design and implement fast, ephemeral, and strictly isolated execution environments where generated work can be built, tested, and safely discarded at scale.
Transform CI/CD into a validation system by embedding automated verification (tests, integration harnesses, canarying, rollback signals) into promotion decisions.
Build production-like validation environments that allow realistic system behavior testing without impacting live systems.
Establish deep observability patterns for autonomous workflows, including tracing what ran, what failed, why, and what it cost across agents, tools, and orchestration layers.
Define and implement guardrails-as-code, including access controls, policy enforcement, cost protections, and auditability for platform usage.
Design for reliability from day one, including scalability, fault tolerance, performance optimization, and operational resilience.
Lead technical design reviews and influence platform and infrastructure decisions across engineering teams.
Define and document reusable infrastructure patterns, platform standards, and reference implementations that create a consistent paved path for teams.
What This Is Not
Not a ticket queue or generic support role.
Not incremental-only ops without ownership of architecture and adoption.
Not “just Kubernetes admin”—Kubernetes is one layer in a broader platform problem.
WHAT YOU'LL NEED:
Typically 10+ years of experience in Site Reliability Engineering, Infrastructure Engineering, or Platform Engineering.
Deep experience designing and operating distributed systems at scale, including cloud platforms (e.g., AWS), Kubernetes, and infrastructure-as-code.
Strong expertise in reliability engineering practices, including incident management, fault isolation, resiliency design, and system performance tuning.
Experience building and operating CI/CD systems, test harnesses, and automated validation frameworks.
Strong understanding of observability systems, including metrics, logging, tracing, and system-level debugging.
Demonstrated ability to define technical standards and influence multiple teams through architecture, design review, and strong engineering judgment.
Strong production mindset, with experience designing systems for scalability, availability, and operational efficiency.
Experience implementing secure, multi-tenant infrastructure with strong isolation, IAM, and secrets management practices.
Excellent cross-functional collaboration skills.
Growth mindset and One Team orientation.
AND IT'S GREAT TO HAVE:
Experience supporting AI/LLM-powered systems in production, including understanding of latency, cost, and orchestration challenges.
Experience designing high-throughput ephemeral compute systems or sandboxed execution environments.
Experience building internal developer platforms or platform-as-a-product capabilities.
Familiarity with governance or regulated environments.
Experience with advanced validation systems such as canarying, chaos engineering, or automated rollback strategies.
What Success Looks Like
Faster delivery through platform-enabled validation and automation.
Automated validation of changes before production, reducing reliance on manual review.
Platform standards adopted across teams as the default paved path.
Early detection of reliability issues through strong observability and validation systems.
Reduced infrastructure complexity so engineers can focus on product and policy.
Compensation for this role will be determined based on a variety of factors, including relevant experience, qualifications, skills, geographic location, and market considerations. The anticipated compensation range for this position is -
zł400,000 - zł460,000 PLN annually- annually. In addition to base compensation, eligible employees may be offered other forms of compensation, such as bonuses, commissions, equity, or other incentive programs, where applicable. Compensation and benefits may vary by location and are subject to applicable legal, business, and market requirements.

WHAT’S IN IT FOR YOU:
At ABC Fitness, we don’t just build technology—we build communities and transform lives. Your work matters here, your growth is supported, and your voice is heard. We welcome diverse talent and encourage you to apply, even if you don’t meet every requirement.
ABC’S COMMITMENT TO DIVERSITY, EQUALITY, BELONGING AND INCLUSION:
ABC is an equal opportunity employer committed to diversity, equity, and inclusion. We strive to create a workplace where every employee, client, and partner feels valued, inspired, and empowered to reach their full potential. For us, inclusion isn’t just the right thing to do—it’s a business imperative. Learn more at abcfitness.com.
About ABC Fitness
ABC Fitness is the #1 software provider for fitness businesses of any size, all around the world. Supporting 30K clubs, 650K coaches, 40M members, and processing more than $12B in payments every year, ABC Fitness provides scalable, data-driven solutions to simplify club management and engage members and clients.
From personal trainers, boutique studios, and gyms, to international franchise health clubs, ABC Fitness will move your business forward through technology and industry insights. Innovation is at the center of everything we do, across ABC Glofox, ABC Ignite, ABC Trainerize, and ABC Evo. Let's make your fitness vision a seamless reality, together. Learn more at abcfitness.com
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