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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.
Overview
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.
Why This Matters
ABC Fitness is building toward an AI-native future by developing agentic experiences, intelligent workflow automation, and platform-level capabilities that turn data and models into action. The work spans recommendation systems, orchestration, embedded intelligence, and scalable AI-powered product experiences that directly influence how customers acquire, serve, retain, and grow their members. It is an opportunity to build applied AI in production, at meaningful scale, on problems that matter to customers every day.
Build internal AI tools that help development teams move faster, safer, and smarter.
ABC Fitness is investing in internal AI-powered platforms that enable our engineering teams to build, ship, understand, and operate software more effectively. This role is focused on creating the software, systems, and workflows that make AI a practical force multiplier for development teams across the company.
As a Principal AI Engineer, you will build and evolve internal software platforms that use AI to support complex development workflows, improve visibility into software changes, and help engineering teams deliver software with greater speed, quality, and confidence. These tools help development teams understand what has changed across applications, automate complex engineering processes, and safely incorporate AI into day-to-day software development.
This is a software engineering role focused on AI enablement. You will not simply experiment with prompts or build one-off AI features. You will build production-grade internal platforms that help development teams function more effectively.
What You’ll Do
Build AI-powered internal development tools
Design and ship internal software platforms that help engineering teams understand, automate, and improve the software development lifecycle.
Enable development teams through platform capabilities
Create reusable tools, APIs, workflows, and interfaces that allow teams to adopt AI-assisted development patterns without needing to build everything from scratch.
Improve software change intelligence
Build systems that connect events from CI/CD, deployments, approvals, security scans, quality gates, source control, work tracking systems, and service dependency data into a coherent view of software change across the organization.
These systems should help teams answer questions such as: What version is in production? What shipped last week? Who approved this deploy? What changed? What depends on this service?
Build durable AI workflow infrastructure
Design and implement infrastructure for long-running AI-assisted workflows, including planning, execution, validation, branching, human-in-the-loop pauses, tool use, checkpoints, and durable state.
These capabilities will support complex development workflows such as code review, change analysis, release support, planning, remediation, and other multi-step engineering processes.
Build for reliability, observability, and scale
Ensure internal AI platforms are production-ready, observable, cost-aware, and resilient, with strong tracing, state management, failure handling, and operational visibility.
Create the paved path for AI-enabled engineering
Define patterns, abstractions, and best practices that make it easier for development teams to safely and consistently use AI in their day-to-day workflows.
Partner across engineering, platform, security, and product
Work closely with development teams to understand their workflows, identify leverage points, and build tools that remove friction from software delivery.
What This Is Not
This is not a research role focused on training models from scratch.
This is not a role building isolated AI features for a single product line.
This is not prompt experimentation without ownership of production systems.
This is not a purely advisory or architecture-only role.
This is a hands-on software engineering role focused on building AI-enabled internal tools for development teams.
What You Bring
Strong software engineering fundamentals
You have deep experience building production-grade backend systems, APIs, workflow engines, internal platforms, developer tools, or distributed systems.
Experience building tools for engineers
You understand developer workflows and have built systems that improve engineering velocity, reliability, delivery quality, or operational awareness.
AI systems experience
You have built or integrated LLM-powered systems, agentic workflows, retrieval patterns, tool-use flows, or AI-assisted automation in production or near-production environments.
Agentic Software Delivery Patterns
Experience understanding and applying emerging agentic software delivery patterns, including graph-based coding-agent workflows, non-interactive coding agents, and software-factory-style approaches.
Platform mindset
You think in terms of reusable capabilities, paved paths, shared abstractions, durable systems, and long-term adoption across engineering teams.
Workflow and orchestration expertise
You understand how to manage state, execution, retries, branching, validation, and human gates in complex multi-step systems.
Production mindset
You design for reliability, observability, security, cost, latency, and maintainability from the beginning.
Bias toward enablement
You care about helping other engineers move faster and do better work. You build tools that are practical, usable, and adopted.
Bonus Points
Experience building internal developer platforms, CI/CD systems, deployment tooling, workflow engines, service catalogs, or software delivery intelligence platforms.
Experience with agentic workflow systems, graph-based execution, durable orchestration, or human-in-the-loop automation.
Experience with LLM observability, evaluation, prompt/version tracking, model routing, or cost controls.
Experience integrating with source control, work tracking systems, CI/CD platforms, deployment systems, security scanners, or service dependency graphs.
Experience with OpenTelemetry, platform portals, internal control planes, or developer experience tooling.
What Success Looks Like
Development teams move faster
Teams can use internal AI tools to plan, review, validate, ship, and understand changes with less manual effort and fewer handoffs.
Software change becomes easier to understand
Teams have clear, reliable answers to questions about what shipped, when it shipped, who approved it, what changed, and what depends on it.
AI-assisted workflows become durable and trustworthy
Long-running AI workflows can execute reliably, pause for humans, resume safely, branch when needed, and provide clear visibility into what happened.
Internal tools become the default path
AI-enabled internal platform capabilities become trusted parts of how engineering teams build, ship, and operate software.
AI improves engineering leverage
AI becomes embedded in the way development teams work, not as isolated experiments, but as reliable internal software that improves delivery, quality, and operational confidence.
Why This Matters
Engineering teams are most effective when they have great tools. At ABC Fitness, we are building internal AI-powered platforms that help developers understand systems, automate complex workflows, and deliver software with greater confidence.
If we get this right, AI will not be a collection of disconnected experiments. It will become part of the internal engineering fabric: helping teams ship better software, move faster, and operate with more clarity.
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 -
zł430,000 - zł460,000 PLN- 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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