As a Lead/Senior Full-Stack Engineer, you will design prompt engineering strategies, develop backend systems, integrate APIs, and ensure secure transaction flows.
We are looking for a skilled Software Engineer to join our team and help build a greenfield WhatsApp conversational bot embedded into our money remittance platform.
This is not just another chatbot project — it combines AI-driven prompt engineering, human-centered conversational UX, and complex backend integrations for a product that will handle regulated, real-money transactions.
You’ll be joining after the prototype stage, helping shape the long-term system architecture as we move from prototype to full-scale production, and directly influencing both the technical architecture and the user experience.
Position Opportunity:
- 🧠 Want to work at the intersection of AI, human behavior, and software? Here, prompt engineering is not an afterthought — it’s the heart of the product. You’ll design prompts and flows that keep the conversation useful, natural, and on track, even when users try to take it sideways.
- 💬 Interested in designing how humans talk to machines? You’ll be crafting natural language UX: guiding users who don’t know the “script” through complex financial flows while keeping the interaction friendly, efficient, and complaint.
- 🔧 Like building rock-solid backend systems? From integrating with the WhatsApp Cloud API to payment processing systems, you’ll engineer services that connect AI conversations to real-world transactions.
What You’ll Do:
- Design, implement, and refine prompt engineering strategies for LLM-based conversational flows using LangChain, LangGraph, and custom NLP logic.
- Collaborate with Product Owners, QA, and other developers to shape conversational UX — anticipating user needs, guiding them through scenarios, and handling unpredictable inputs gracefully.
- Develop and maintain backend systems in Python, NestJS, and Node.js for integrations with Meta’s WhatsApp Cloud API, payment platforms, and internal services.
- Implement secure, compliant flows for transactions and personal data handling.
- Deploy and operate services in Docker/AWS using AWS CDK and modern DevOps practices.
- Contribute to the full development lifecycle: architecture, coding, testing, deployment, and monitoring.
We Expect You to Have:
- Deep knowledge and 5+ years of production experience
- Solid backend development skills with Node.js/NestJS (Python is a plus).
- Experience integrating with complex third-party APIs (payments, messaging, etc.).Proficiency in frontend development using JavaScript/TypeScript and React.
- Familiarity with Сloud and container technologies
- English proficiency – B2 or higher.
It Would Be a Plus To Have:
- Experience with Meta’s WhatsApp Business Platform or other messaging APIs (Telegram, Viber, etc.).
- Experience with LangChain and LangGraph.
- Experience in business analysis and communications with users and stakeholders. Work on financial/payment-processing systems.
- Experience in building scalable and highly-available system architectures.
- Hands-on experience with Amazon Web Services (AWS).
We are pleased to offer you:
- Remote work opportunity!
- B2B Employment ($, gross).
- Really good hardware.
- An exciting and challenging job with talented people around.
- Great learning and growth opportunities.
- Compensation for professional training, seminars, and conferences.
- First-class English lessons.
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.
Top Skills
Node.Js,Nestjs,Python,Javascript,Typescript,React,Docker,Aws
Similar Jobs
Machine Learning • Natural Language Processing
Join Welo Data to provide high-quality AI datasets including annotation, labeling, and data collection in multiple languages.
Top Skills:
AIDigital Tools
Cloud • Security • Software • Cybersecurity • Automation
As an Intermediate Backend Engineer, you'll enhance GitLab's AI capabilities using Ruby on Rails and Python, collaborating with other teams to improve the product and generate innovative solutions.
Top Skills:
Ai TechnologiesGraphQLPythonRspecRuby On Rails
Machine Learning • Natural Language Processing
As a Dutch Expert Rater, you will review online ads to improve their relevance and usefulness, contributing to AI training and quality standards.
Top Skills:
Ai SystemsOnline Ads
What you need to know about the Boston Tech Scene
Boston is a powerhouse for technology innovation thanks to world-class research universities like MIT and Harvard and a robust pipeline of venture capital investment. Host to the first telephone call and one of the first general-purpose computers ever put into use, Boston is now a hub for biotechnology, robotics and artificial intelligence — though it’s also home to several B2B software giants. So it’s no surprise that the city consistently ranks among the greatest startup ecosystems in the world.
Key Facts About Boston Tech
- Number of Tech Workers: 269,000; 9.4% of overall workforce (2024 CompTIA survey)
- Major Tech Employers: Thermo Fisher Scientific, Toast, Klaviyo, HubSpot, DraftKings
- Key Industries: Artificial intelligence, biotechnology, robotics, software, aerospace
- Funding Landscape: $15.7 billion in venture capital funding in 2024 (Pitchbook)
- Notable Investors: Summit Partners, Volition Capital, Bain Capital Ventures, MassVentures, Highland Capital Partners
- Research Centers and Universities: MIT, Harvard University, Boston College, Tufts University, Boston University, Northeastern University, Smithsonian Astrophysical Observatory, National Bureau of Economic Research, Broad Institute, Lowell Center for Space Science & Technology, National Emerging Infectious Diseases Laboratories
