Senior Python Engineer (LLM)

Posted 3 Days Ago
Be an Early Applicant
7 Locations
Hybrid
Senior level
Other
The Role
Design and develop applications integrating LLMs and cloud infrastructure, focusing on backend expertise in production systems and large datasets.
Summary Generated by Built In
Net2Phone is seeking a Senior Python Engineer with deep backend expertise and practical experience integrating AI into production systems. You’ll join our agile R&D team working on greenfield initiatives that harness LLMs, cloud infrastructure, and data-driven systems to build powerful new tools for real-world use.

Important note:
This role is not focused on building or fine-tuning custom AI/ML models. We are looking for engineers with strong backend and cloud skills who can integrate and operationalize LLMs from top providers into scalable products.

At IDT you will:

  • Architect and develop full-stack applications powered by LLMs and modern backend services.
  • Integrate large language models into production systems through APIs and prompt engineering.
  • Design and manage scalable cloud infrastructure (AWS, GCP, or Azure).
  • Build and optimize data storage and querying for large, complex datasets.
  • Rapidly prototype and iterate on MVPs and product concepts.
  • Collaborate in a small, innovative R&D team with full autonomy and high impact.

We expect you to have:

  • Expert-level Python development experience in backend-heavy environments.
  • Strong experience using LLMs via APIs and prompt engineering (e.g., OpenAI, Anthropic).
  • Deep understanding of cloud architecture, distributed systems, and deployment best practices.
  • Proven skills in database design, optimization, and handling large datasets.
  • Startup or R&D mindset: independent, curious, fast-moving, and pragmatic.
  • Excellent communication skills and fluent English (B2+ or higher).
  • Nice to have: Full-stack capability with experience in React or modern frontend frameworks.

We are pleased to offer:

  • Remote work opportunity!
  • B2B Employment ($, gross).
  • Great learning and growth opportunities.
  • Compensation for professional training, seminars, and conferences.

Why Join Us?

  • Work on truly greenfield AI-powered products with a small, elite team.
  • Have real ownership and autonomy from day one.
  • Focus on applied AI — solving practical problems with real-world impact.
  • Operate in a startup-like environment within a stable, global company (IDT.net).

A few words about us:

IDT Corporation is a global communications company founded in 1990 and headquartered in Newark, New Jersey. We are industry leaders in prepaid communication and payment services and one of the largest international voice carriers. We are listed on the NYSE, employ over 1800 people across 20 countries, and have over $1.5 billion in revenues. 
 
We are not ”another big IT corporation”— we encourage and support in-house entrepreneurs in developing their ideas into business actions.
 
Net2Phone is a rapidly growing global provider of unified cloud communications solutions. It solves the problem of cost optimization for businesses in more than 50 countries, providing them with high-quality VoIP services. Net2Phone provides businesses with an integrated communications suite featuring powerful collaboration tools such as voice, messaging, chat, and unlimited domestic and international calling to 23+ countries. 
The product was named ‘VoIP Supplier of the Year’ by the Telecom Consulting Group in 2018.

Top Skills

AWS
Azure
GCP
Llms
Python
React
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The Company
HQ: Newark, NJ
1,151 Employees
Year Founded: 1990

What We Do

We know that you’ll have looked at quite a few company pages but IDT is different. We want people who want to make a big difference to our company with big ambitions. We’re a truly global team, with 1300 people working across all continents, apart from (at the moment!) Antarctica. But we are proud that despite our size, we encourage and support any in-house entrepreneurs to develop their ideas into business action. Our exciting growth plans make it a great time to join us.

Our people are the reason for IDT’s passion for success. The IDT family is made up of people of all backgrounds, expertise, and interests, all with a relentless team spirit. We need people who share both our commitment to success and excitement about our journey. You won’t ever be bored or have to wonder how to fill your time. You’ll find the work challenging but you’ll get the support of a great team to help you beat those challenges. You will also be expected to support others as well as work hard, work well and work with a smile.

If you want a join a company that will help you become your brilliant best and achieve amazing results, then you want to join IDT.

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