Senior Backend Developer (Hybrid)
Bucharest, Romania
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Orion Innovation
Orion delivers digital transformative business solutions rooted in digital strategy, experience design, and engineering, enabling our clients with digital transformation to operate with agility at scale.Orion Innovation is a premier, award-winning, global business and technology services firm. Orion delivers game-changing business transformation and product development rooted in digital strategy, experience design, and engineering, with a unique combination of agility, scale, and maturity. We work with a wide range of clients across many industries including financial services, professional services, telecommunications and media, consumer products, automotive, industrial automation, professional sports and entertainment, life sciences, ecommerce, and education.
Our Partner
Our partner (listed on NASDAQ) is the leading expert in 5G ready cloud-native, network intelligence solutions for telecom operators transitioning to 5G. Their Network Intelligence consists of Network Visibility, Service Assurance, and Network Insights. The Network Intelligence suite offers intelligent, container-based, on-demand solutions to deliver network analysis from the RAN to the Core for 5G assurance. Utilizing automated and dynamic solutions with smart minimal data collection and on-demand troubleshooting and cutting-edge techniques based on machine learning, these solutions work in harmony to provide operators an understanding of the entire customer experience and allow them to troubleshoot network performance from a high to granular level while reducing storage costs and cloud resource utilization.
Overall Objective of the Role
We are looking for a Senior Backend Developer to join us in building a new generation of backend microservices that combine telecom-grade robustness with the power of AI. You’ll develop high-performance systems while integrating and orchestrating Large Language Models (LLMs) directly into backend flows – not just consuming APIs, but shaping how AI enhances network data processing, automation, and reasoning. This is a hands-on role where you’ll be working in a small, agile team with strong AI and telecom collaboration. Our goal is to bring together structured data, intelligent backend design, and state-of-the-art AI models to solve real-world problems in telecom. You’ll also work with telecom-specific AI components such as the RAN Intelligent Controller (RIC) – a critical part of 5G network automation.
Responsibilities
- Design and develop backend microservices using one of: Java (Spring Boot), Go, or Python.
- Create services that embed and interact with LLMs (e.g., prompt pipelines, output parsing, feedback loops).
- Contribute to the architecture of hybrid AI + telecom systems.
- Build scalable APIs and efficient pipelines to process telco/networking data and expose them through API Gateways.
- Package and deploy services with Docker & Kubernetes.
- Collaborate closely with AI engineers and telecom domain experts in a fast-paced, agile team.
Requirements
Must Have:
- BSc in Computer Science, Engineering or similar technical degree.
- 4+ years of backend development experience using Java/Spring Boot, Go, or Python (at least one).
- Solid understanding of microservices architectures and API-based systems.
- Hands-on experience with Docker, Kubernetes, and CI/CD pipelines.
- Familiarity with CI/CD workflows and Linux environments.
- Understanding of SQL and relational databases.
- Passion for AI and some practical exposure to LLMs (OpenAI, Hugging Face, LangChain, etc.) even in hobby/personal projects.
- Willingness to learn telecom concepts like 4G/5G, RAN, Core.
Nice to Have:
- Understanding of telecom networks, 5G architecture, or network automation.
- Experience building orchestration logic or wrapper services for LLMs.
- Familiarity with embedding/vector databases (e.g., Pinecone, Weaviate, Qdrant).
- Familiarity with API Gateways and request-routing logic.
Reasons to Work with Us
- Competitive financial conditions.
- Opportunity to work on internationally recognized projects.
- Flexible schedule and a hybrid work model, prioritizing remote work as much as possible to support work-life balance.
- An exciting career path within a friendly, dynamic, and growing organization.
- Professional development opportunities in a multicultural environment.
- Private medical coverage with Medlife or Regina Maria.
- Meal vouchers.
- Gift vouchers for special occasions such as birthdays, weddings, or childbirth.
- Wellbeing programs, including sick days, 7Card subscriptions, and relaxation facilities in the office.
- Team-building events and other social experiences.
- Budget allocated for certifications relevant to your project.
- Workshops, internal training sessions, and knowledge-sharing opportunities.
- Access to LinkedIn Learning, upon request.
- Access to Udemy, if required for your project.
- Convenient city-center office location.
- Shared parking spaces.
As a global digital transformation company, Orion values creating a productive, diverse work environment. We are committed to maintaining a positive work environment where our people value traits that make each one of us different from one another. We all bring a diverse set of perspectives, work and life experiences, and our differences make us more valuable both internally and for our clients.
Orion is an equal opportunity employer, and all qualified applicants will receive consideration for employment without regard to race, color, creed, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, citizenship status, disability status, genetic information, protected veteran status, or any other characteristic protected by law.
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* Salary range is an estimate based on our AI, ML, Data Science Salary Index 💰
Tags: Agile APIs Architecture CI/CD Computer Science CX Docker E-commerce Engineering Industrial Java Kubernetes LangChain Linux LLMs Machine Learning Microservices OpenAI Pinecone Pipelines Privacy Python RDBMS SQL Weaviate
Perks/benefits: Career development Flex hours Health care Team events
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