About us:
Talent has no borders. Proxify's mission is to connect top developers around the world with the opportunities they deserve. So, it doesn't matter where you are; we are here to help you fast-track your independent career in the right direction.
Since our launch, Proxify's developers have successfully worked with 1200+ happy clients to build their products and growth features. 5000+ talented developers trust Proxify and its network to fulfill their dreams and objectives.
Proxify is shaped by a global network of supportive, talented developers interested in remote full-time jobs. Our Glassdoor (4.5/5) and Trustpilot (4.8/5) ratings reflect the trust developers place in us and our commitment to our members' success.
The Role:
We are looking for a senior-level Machine Learning Engineer to spearhead the AI strategy and architecture for one of our clients. This is a pivotal leadership role designed for an engineer who can move beyond basic API integrations to build a robust, production-grade AI engine that drives core business value.

What we are looking for:
Machine Learning Engineering: Proven experience building and deploying ML models in a production environment, specifically focused on Natural Language Processing (NLP) or Recommendation Systems. Advanced LLM Implementation: Deep expertise in working with Large Language Models (e.g., GPT-4, Llama 3) beyond simple API calls, including context window management and cost optimization. Agentic Frameworks & RAG: Strong proficiency in building agentic workflows and implementing retrieval mechanisms (e.g., Vector Databases, SQL-aware AI agents). Software Engineering: Strong Python skills and the ability to work within a backend ecosystem to ensure AI features are scalable and stable. Strategic Ownership: Ability to translate client needs into a technical roadmap and defend architectural choices to stakeholders. Intermediate-advanced English level. Time zone: CET (+/- 3 hours). We are unable to consider applications from candidates in other time zones.
Nice-to-Have Skills:
Specialized Fine-Tuning: Experience in fine-tuning open-source models for niche industry domains. Data Science Foundations: Background in data cleaning, preprocessing, and exploratory data analysis to support custom model training. Geographical Preference: Candidates located within European time zones or those open to future relocation to Berlin.
Responsibilities:
Architectural Leadership: Act as the primary technical authority for AI/ML decisions, selecting appropriate models (LLMs, SLMs) and frameworks based on specific business use cases. Roadmap Execution: Lead the transition from generic model utilization to sophisticated, data-integrated architectures, targeting custom fine-tuning by mid-2024. System Integration: Design and implement agentic workflows and RAG (Retrieval-Augmented Generation) systems that interface seamlessly with existing backend services. Performance Optimization: Advance beyond basic prompt engineering to improve model accuracy, reliability, and responsiveness for client-facing matching algorithms. Mentorship & Best Practices: Establish high standards for AI development within the engineering team, providing guidance on "production-grade" AI implementation versus prototyping.

What we offer:
Get paid, not played No more unreliable clients. Enjoy on-time monthly payments with flexible withdrawal options.
Predictable project hours Enjoy a harmonious work-life balance with consistent 8-hour working days with clients.
Flex days, so you can recharge Enjoy up to 24 flex days off per year without losing pay, for full-time positions found through Proxify.
Career-accelerating positions at cutting-edge companies Discover exclusive long-term remote positions at the world's most exciting companies.
Hand-picked opportunities just for you Skip the typical recruitment roadblocks and biases with personally matched positions.
One seamless process, multiple opportunities A one-time contracting process for endless opportunities, with no extra assessments.
Compensation Enjoy the same pay, every month with positions landed through Proxify.