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Senior Software Engineer, RAG

Job Category: Engineering & Cloud

Meet Our Team:

We are a multi-disciplinary and multicultural team focused on building CRM solutions used by some of the largest companies in the world. You will bring your AI and RAG experience to help support document understanding, workflow automation and enterprise search.

_This role is based out of our Waltham, Massachusetts office._** **_​​_

_Please note, candidates must have authorization to work in the US without sponsorship_

Picture Yourself at Pega:

By joining this team, you will help build a state-of-the-art RAG solution that will be used to power industry-leading Knowledge management and Customer Service solutions. This will be integrated into various components like Chat and Voice bots and Customer Service Representative Desktops. ​​​

What You'll Do at Pega:

+ Improve and evolve the existing Retrieval-Augmented Generation (RAG) architecture to enhance performance, scalability, and reliability.

+ ​Refine chunking strategies (size-based, title-based, semantic) to optimize document segmentation for better retrieval and generation.

+ ​Fine-tune LLMs and optimize prompts for domain-specific tasks using the current system as a foundation.

+ ​Implement grounding and citation techniques to ensure traceability of generated content.

+ ​Partner with ML engineers, product managers, and domain experts to align technical improvements with business goals.

+ ​Contribute to internal research initiatives and represent the team at conferences and industry events.​​​

Who You Are:

+ You bring deep expertise in enhancing AI systems, with a focus on RAG pipelines and LLM integration.

+ You bring deep experience with vector databases (e.g. pgVector) and semantic search.

+ Are fluent in Python and ML Frameworks, and demonstrate software engineering excellence through clean, maintainable, and scalable code.

+ You possess strong understanding of chunking strategies, embeddings, and hybrid search techniques.

+ You have Familiarity with prompt engineering and LLM fine-tuning (e.g., GPT, Claude).

+ Possess strong architectural thinking and experience in designing ML pipelines that operate at scale and integrate into cloud-based platforms

+ Actively collaborate with product managers, architects, and other stakeholders to shape strategy and influence technical direction.

+ Stay current with academic research and industry trends and are skilled at bringing those insights into practical implementation.

+ Communicate with clarity, influence across disciplines, and lead by example through hands-on contributions and thought leadership.

Pega Offers You:

+ Gartner Analyst acclaimed technology leadership across our categories of products

+ Continuous learning and development opportunities

+ An innovative, inclusive, agile, flexible, and fun work environment

+ Competitive global benefits program inclusive of pay + bonus incentive, employee equity in the company

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Additional Information

Base salary range for this role is 125,500 - 187,600 USD annually. This role may also be eligible for annual bonus OR commission, as well as benefits and other incentives.

The final compensation will be determined during the offer process based on the candidate's education, experience, skills, and qualifications, as well as market conditions and may vary from the posted range. We will share an information on benefits, bonus/commission, and other pay components for this role at the relevant recruitment stage.

Job ID: 22761

It is Pega's policy to engage, recruit, hire, promote, train, discipline, and compensate in all job classifications, without regard to race, color, sex, religion, national origin, age, disability, sexual orientation, gender identity, veteran status, or any other category protected by law.

https://www.pega.com/about/careers/equal-employment-opportunity