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The Role
Integrate machine learning models into production SaaS features by deploying model-serving endpoints, building Python or Node.js microservices, designing REST APIs, and supporting React interfaces. Optimize inference performance, scalability, and reliability through caching, asynchronous processing, and batching. Containerize and orchestrate services, maintain API contracts, implement CI/CD and automated tests, and collaborate with data science, product, QA, and engineering teams.
Summary Generated by Built In
Integration Engineer - Machine Learning
OneRail is a technology company innovating solutions for multi-modal delivery. We have built and continue to develop a delivery orchestration platform that connects shippers to an extensive courier ecosystem to automate, optimize, and control the entire delivery supply chain, from the demand signal to the proof of delivery.
Our OmniPoint SaaS platform uses proprietary algorithms and artificial intelligence to power efficient same-day delivery programs for major companies like Lowe’s, Pepsi, American Tire Distributors, and Advance Auto Parts.
We’re seeking a dedicated Integration Engineer whose primary focus will be integrating machine learning models into our flagship product. You’ll bridge the gap between data science and production software—implementing, deploying, and maintaining ML-powered features while contributing to back-end services and React-based front-end components. Your work will enable seamless, scalable AI capabilities for end users.
Key Responsibilities:
Not sure if you have enough experience to meet the challenge, but still willing to learn and join our team? Send us your application and we will be happy to talk about the possibilities. Think big!
Why Join OneRail Poland?
Work Style: hybrid (2-3 days from the office / week preferred), We are open to a more flexible arrangement for candidates located outside the Krakow area.
Salary level: 20 000 – 27 000 PLN/ month
Take the next step in your career and become a part of OneRail’s exciting journey!
OneRail is a technology company innovating solutions for multi-modal delivery. We have built and continue to develop a delivery orchestration platform that connects shippers to an extensive courier ecosystem to automate, optimize, and control the entire delivery supply chain, from the demand signal to the proof of delivery.
Our OmniPoint SaaS platform uses proprietary algorithms and artificial intelligence to power efficient same-day delivery programs for major companies like Lowe’s, Pepsi, American Tire Distributors, and Advance Auto Parts.
We’re seeking a dedicated Integration Engineer whose primary focus will be integrating machine learning models into our flagship product. You’ll bridge the gap between data science and production software—implementing, deploying, and maintaining ML-powered features while contributing to back-end services and React-based front-end components. Your work will enable seamless, scalable AI capabilities for end users.
Key Responsibilities:
- Work with ML pipeline engineers to deploy and maintain ML models (e.g., PyTorch, scikit-learn) as robust service endpoints.
- Collaborate with data scientists and product to productionize prototypes, and extend the product to enable ML and AI features.
- Define and evolve RESTful APIs with OpenAPI/Swagger—ensuring they support low-latency, high-throughput ML inference.
- Version, document, and maintain API contracts for internal and external consumers.
- Build microservices (Python—FastAPI/Flask—or Node.js) that encapsulate ML logic, data pre/post-processing, and business rules.
- Optimize service performance, scalability, and reliability (caching, async processing, batching).
- Implement and modify React components and pages to expose ML-driven functionality
- Ensure seamless data flow from back end to front end, handling streaming or polling as needed.
- Containerize ML services (Docker) and orchestrate deployments
- Work closely with cross-functional teams (data science, product, QA) to translate ML requirements into production features.
- Champion code quality, API versioning strategies, and thorough documentation.
- 3+ years of professional full-stack development, with a clear track record of integrating ML into production systems.
- Hands-on experience serving models in production (model serialization, serving frameworks, inference optimizations).
- Strong TypeScript and Python proficiency
- Experience with microservices architecture, message brokers (Kafka wtc), and async frameworks
- Solid React knowledge (hooks, context, state management);
- Deep understanding of REST principles, OpenAPI/Swagger, and API versioning/Backward-compatibility.
- Docker and orchestration experience.
- CI/CD pipelines (GitHub Actions, Jenkins, GitLab CI) and automated testing (unit, integration, e2e).
- Strong communicator, able to translate technical concepts for non-technical stakeholders.
- Excellent problem solver with an eye for scalable system design.
- Advanced proficiency in English, both written and spoken (B2+).
Not sure if you have enough experience to meet the challenge, but still willing to learn and join our team? Send us your application and we will be happy to talk about the possibilities. Think big!
Why Join OneRail Poland?
- Innovation at its Core: Work on industry-leading technology that is shaping the future of logistics.
- Career Growth: Opportunities for professional development and career advancement.
- Collaborative Culture: Join a team of talented engineers and industry experts.
- Exciting Challenges: Solve complex problems and contribute to impactful projects.
- Flexibility: We offer a flexible hybrid work style and flexible employment types to suit your needs, ensuring a work-life balance that works for you.
- Competitive Compensation: Attractive salary and benefits package.
Work Style: hybrid (2-3 days from the office / week preferred), We are open to a more flexible arrangement for candidates located outside the Krakow area.
Salary level: 20 000 – 27 000 PLN/ month
Take the next step in your career and become a part of OneRail’s exciting journey!
Skills Required
- 3+ years of professional full-stack development experience
- Track record of integrating machine learning into production systems
- Hands-on experience serving machine learning models in production, including serialization, serving frameworks, and inference optimization
- Strong proficiency in TypeScript and Python
- Experience with microservices architecture, message brokers such as Kafka, and asynchronous frameworks
- Solid knowledge of React, including hooks, context, and state management
- Deep understanding of REST principles, OpenAPI/Swagger, API versioning, and backward compatibility
- Experience with Docker and orchestration
- Experience with CI/CD pipelines using GitHub Actions, Jenkins, or GitLab CI
- Experience with automated unit, integration, and end-to-end testing
- Strong communication skills and ability to explain technical concepts to non-technical stakeholders
- Strong problem-solving skills and scalable system design capability
- Advanced written and spoken English proficiency at B2+ level
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The Company
What We Do
OneRail is a leading omnichannel fulfillment solution that pairs best-in-class software with logistics as a service to provide dependability and speed. Their platform utilizes AI to connect shippers with a courier ecosystem, automating and optimizing the delivery supply chain.
