Machine Learning Engineer (Mid-Level / Senior)

About the Position

We are seeking talented Machine Learning Engineers at both Mid-Level and Senior levels to join our growing AI and Data team. In this role, you will design, build, and deploy cutting-edge machine learning and generative AI solutions that solve complex business challenges. You’ll work on developing secure, scalable, and production-ready AI systems, collaborating with multidisciplinary teams to transform research and innovative concepts into real-world applications.

Depending on your level of experience, you’ll take ownership of technical initiatives, contribute to architectural decisions, mentor colleagues, and help shape engineering best practices.

Responsibilities

• Design, develop, test, and maintain machine learning and AI applications.
• Build and deploy scalable ML services, data processing pipelines, evaluation frameworks, and AI-powered applications.
• Translate research concepts and prototypes into reliable, production-ready solutions.
• Collaborate with cross-functional teams to understand business requirements and deliver high-quality technical solutions.
• Develop AI systems that meet privacy, security, and regulatory requirements.
• Integrate machine learning solutions into existing platforms, infrastructure, and business workflows.
• Troubleshoot technical, data, and deployment issues across the ML lifecycle.
• Contribute to engineering best practices, reusable frameworks, internal tooling, and MLOps processes.
• Communicate technical concepts, trade-offs, and project progress to both technical and non-technical stakeholders.
• Stay up to date with advancements in AI, machine learning, and software engineering, applying new technologies where appropriate.
• Senior Engineers: Provide technical leadership, mentor team members, contribute to solution architecture, and drive engineering excellence across projects.

Requirements

Required Qualifications

• Bachelor’s or Master’s degree in Computer Science, Mathematics, Statistics, Engineering, Physics, or a related STEM discipline (or equivalent practical experience).
• Mid-Level: 3+ years of experience in Machine Learning, Artificial Intelligence, Data Science, or Software Engineering.
• Senior: 5+ years of relevant industry experience with demonstrated ownership of production AI/ML systems.
• Strong Python development skills with a focus on writing clean, maintainable, well-tested, and well-documented code.
• Experience developing and deploying machine learning or AI solutions in production or near-production environments.
• Experience building applications powered by Large Language Models (LLMs), Generative AI, or AI evaluation frameworks.
• Experience with cloud platforms and modern MLOps practices, including model deployment and monitoring.
• Strong knowledge of Linux, Docker, Git, CI/CD pipelines, and containerized application deployment.
• Experience across the complete ML lifecycle, from experimentation and prototyping to production deployment.
• Experience building data pipelines, APIs, or AI-enabled applications.
• Strong analytical and problem-solving skills with the ability to work in dynamic, collaborative environments.
• Excellent communication skills and the ability to explain technical concepts to both technical and non-technical stakeholders.

Nice to Have

• Experience working in privacy-focused, secure, or compliance-sensitive environments.
• Experience delivering AI solutions within regulated industries such as financial services, insurance, healthcare, or the public sector.
• Experience collaborating with external partners, research organizations, or academic institutions.
• Familiarity with agentic AI architectures, Model Context Protocol (MCP), Agent-to-Agent (A2A) communication, or inference-time privacy techniques.
• Experience using AI-assisted development tools such as GitHub Copilot, Claude, Claude Code, Cursor, or similar developer productivity tools.

We Offer

• Relocation package
• Competitive compensation packages
• Flexible working hours
• Job rotation
• Learning through Arnia Academy
• Attractive projects
• Trainings
• International work experience
• Referral program
• Medical benefits

About the Company

At Arnia, we are a diverse and passionate team of software development engineers, quality assurance engineers, business analysts, system administrators, and managers, united by our shared dedication to creating high-quality software solutions and delivering exceptional services to our valued customers and partners.

We believe in customer satisfaction as being the single most important goal we want to achieve in everything we do. But we also believe that we can reach this goal while having fun at work, making friends, and enjoying working together. We have game evenings, nights out and team building events to help us know each other better and spend quality time together. Also, we have a flat organization, with no unnecessary hierarchies and where you reach the management easily.

In Arnia you will meet very skilled software engineers with rich academic backgrounds, with passion for innovation and continuous education, self-driven and oriented toward results. At the same time, they are people with high sense of humour, fun and informal, that value friendship, trust and a nice working environment.

Excellence is achieved step by step, it is a journey we always take together as a team and as a modern organization.

We recognize the value of each individual, we value diversity and we support your development career – your success is our success! We take pride in helping our people to develop their career, continuously improving their skills and their technical knowledge and to fully reach their own development goals.

People are different, they are coming from various cultures and are motivated by different things:

• The financial interests
• The career development plan
• The technologies and the projects
• The work-life balance
• The opportunities to travel abroad

Why Arnia?

We recognize people’s diversity and we try to meet everyone’s goals.

• Game Evenings
• Nights Out
• Team Buildings
• Trainings

Arnia encourages you to pursue your own interests, projects and ideas – passion can turn small things into big things – we want to be part of your own individual success. Let us know your ideas and your personal interests and we will find a way to support you.

Relocation Package

Competitive Compensation Packages

Flexible Working Hours

Job Rotation

Performance Bonuses

Medical Benefits

Not the least, we have class A offices, located in Piata Victoriei – Europa House building, next to the metro stations and to other transportation means. It is very easy to get to work and you will enjoy the quality and the lifestyle of our offices.

Attractive Projects

International Work Experience

Referral Program

Learning Through Arnia Academy

And if you like all these, why don’t you join us?

Recruitment Process

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Thank you for your interest in our internship program

We are sorry to inform you that we do not have any internships available at the moment.

Please check back later for updates on our future opportunities.

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Arnia Software has consolidated its position as a preferred IT outsourcing company in Romania and Eastern Europe, due to its excellent timely delivery and amazing development team.

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Our services include:

Nearshore with Arnia Software

Software Development Outsourcing

Offshore Software Development

Engagement Models

Bespoke Software Development

Staff Augmentation

Digital Transformation

Mobile App Development

Banking Software Solutions

Quality Assurance

Project Management

Open Source

Nearshore Development Centre

Offshore Development Centre