Senior Generative AI & Backend Engineer | Healthcare Informatics Domain Expert

Sanjoy Roy

Building production-grade Agentic AI systems, cloud-native architectures, and healthcare-aware digital solutions.

I design and build advanced Generative AI systems, cloud-native applications, and backend architectures that help organizations modernize their digital capabilities. With deep expertise in LLM automation, agentic workflows, RAG pipelines, and vector search optimization, I specialise in converting complex business processes into reliable, scalable AI-driven products. My engineering work spans multiple industries—helping companies automate knowledge work, accelerate operations, and deliver intelligent user experiences.

Alongside my engineering expertise, I bring 10+ years of hands-on experience in the Indian healthcare ecosystem, including diagnostics, HIS/LIS workflows, telemedicine, data interoperability, and healthcare process optimization. This unique combination lets me deliver end-to-end AI consulting for healthcare organisations—bridging the gap between domain understanding and technical execution. Whether you’re building AI-powered clinical tools, workflow automation, or data platforms, I help craft solutions that are compliant, safe, and truly usable in real-world healthcare settings.

What I Deliver

Generative AI Engineering & Agentic Systems

I help organizations move beyond AI prototypes and into production-grade intelligent systems. By combining deep LLM engineering expertise with retrieval workflows, vector search, and agentic planning, I build AI agents that execute real business logic—handling tools, APIs, data pipelines, and multi-step reasoning autonomously. Whether you’re scaling a GenAI product, modernizing existing workflows, or building domain-adaptive RAG pipelines, I ensure solutions that are robust, auditable, and engineered for long-term reliability. Companies work with me because I bring a rare blend of backend rigor and cutting-edge AI architecture that consistently delivers results in enterprise environments.

Cloud-Native Backend Engineering & System Architecture

I design and build high-performance backend systems that serve as the foundation for modern AI-enabled applications. With expertise across microservices, distributed APIs, data processing, containerization, and DevOps automation, I create backend architectures that scale smoothly under real-world load. My approach focuses on clarity, reliability, and maintainability—ensuring systems that are easy to evolve and integrate with advanced AI components. Engineering teams value my ability to combine strong fundamentals with practical system design, enabling faster delivery, cleaner architecture, and stable production operations across cloud platforms like AWS, Azure, and GCP.

Healthcare Informatics Consulting & Domain Expertise

With over 10 years in healthcare IT, I bring deep domain understanding of HIS, LIS, EMR workflows, interoperability standards, clinical data models, and healthcare operations. I help hospitals, diagnostics networks, and health-tech startups streamline processes, improve data quality, and architect systems that align with medical, regulatory, and operational realities. My strength lies in bridging the gap between technology and healthcare practice—designing AI-driven and traditional IT solutions that truly fit clinical workflows. Clients and research collaborators trust me because I combine domain expertise with strong engineering capability, enabling digital transformation that is both technically sound and healthcare-aware.

Generative AI Engineering & Agentic Systems

Agentic AI Systems Design

I design AI agents that don’t just answer questions — they take actions. Using planning, tool-use, memory, and workflow branching, I build agentic systems that can coordinate across APIs, databases, and enterprise tools to automate complex, multi-step processes. Clients benefit from systems that are more autonomous, reliable, and measurably reduce manual workload.

Retrieval-Augmented Generation (RAG) Pipelines

I build enterprise-grade RAG pipelines that make LLMs accurate, grounded, and domain-specific. From document parsing and chunking to retrieval optimization and latency reduction, I design RAG systems that scale on cloud storage (S3/Blob/GCS) and integrate seamlessly into backend applications. This helps clients deliver fact-aware AI systems suitable for production.

Vector Search, Embeddings & Knowledge Graph Integrations

I architect semantic search and embedding pipelines that enable deep contextual understanding of enterprise data. Whether using vector DBs, KGs, hybrid retrieval, or cross-modal embeddings, I ensure information is discoverable, linkable, and optimized for fast retrieval. This empowers clients with richer search, better recommendations, and AI systems capable of reasoning over structured + unstructured data.

LLM Automation Workflows

I design automated LLM workflows that connect prompts, tools, APIs, and business rules into orchestrated pipelines. These automations power summarization, reporting, analysis, email generation, data extraction, and more — all while maintaining guardrails and auditability. Clients see immediate process acceleration and operational consistency.

Fine-Tuning, Tool-Use Agents & Evaluation Frameworks

I help teams adapt models to their domain through fine-tuning, prompt engineering, tool integration, and systematic evaluation. From domain adaptation (LoRA/FT) to developing evaluators for accuracy, hallucination, and safety, I ensure your AI behaves reliably in real-world environments. This reduces deployment risk and improves long-term performance.

AI Architecture Consulting for Product Development

I advise teams on designing AI-first products — from system architecture to data flows, tooling choices, scalability patterns, and DevOps integration. With a blend of backend engineering and GenAI expertise, I provide a blueprint that reduces technical debt, speeds up development, and ensures your product is production-ready from day one.

Let’s build it together

Build AI systems that reason, retrieve, coordinate, and automate end-to-end workflows.

I design and implement production-grade Generative AI platforms that go far beyond simple API wrappers. My work focuses on building agentic systems capable of reasoning, retrieving knowledge, coordinating tasks, and executing complex workflows end-to-end. This includes architecting intelligent agents with planning, tool-use, memory, and branching logic; creating robust RAG pipelines that deliver domain-accurate retrieval; and developing AI-powered automation tightly integrated with enterprise systems. Whether it’s semantic search, document pipelines, knowledge-graph–enhanced retrieval, or fine-tuning and guardrail frameworks, the solutions I build are engineered for reliability and scale across cloud-native environments.

Organizations often struggle with AI adoption because early prototypes break under real-world conditions. Poor retrieval, hallucinations, lack of multi-step reasoning, disjointed data sources, fragile pipelines, and high costs can quickly turn AI initiatives into liabilities. By bringing agentic architecture, solid engineering, and enterprise integration practices together, I turn LLMs into dependable operational systems that deliver measurable business value rather than one-off demos.

I add value by combining backend engineering depth with modern AI design principles, enabling teams to automate repetitive workflows, expose natural-language interfaces to internal tools, secure their data flows, improve accuracy through tailored retrieval, and deploy scalable API-driven AI microservices. My solutions prioritize observability, CI/CD, safety, and operational trust so that AI becomes a sustainable part of the product stack—not an experiment.

Want AI that performs real work, not just generate text?



Cloud-Native Backend Engineering & System Architecture

Microservice Architecture

I design modular, domain-aligned microservice architectures that are easy to maintain, scale, and extend. By applying clean boundaries, event-driven patterns, and robust communication strategies, I help clients reduce coupling, increase agility, and evolve their systems without disruptive rewrites.

API Design & Distributed Systems

I architect secure, high-quality APIs and distributed backend systems that serve as the foundation for modern applications. From REST to GraphQL to async event streams, I ensure APIs are efficient, well-documented, and optimized for high-throughput interactions. This gives clients resilient data exchange and predictable system behavior across services.

Containerization, Orchestration & Kubernetes

I containerize services and deploy them on orchestrated environments like Kubernetes, ensuring reliability and consistent performance at scale. I help clients improve deployment speed, achieve zero-downtime rollouts, and standardize environments across dev, staging, and production.

High-Performance Backend Development

I build backend systems optimized for speed, concurrency, resource efficiency, and clean engineering practices. Whether using .NET, Python, or distributed caching strategies, I enable clients to handle large workloads with lower latency and predictable performance under pressure.

CI/CD Pipelines & DevOps Alignment

I design automated CI/CD pipelines with strong DevOps alignment, enabling rapid and stable delivery. From automated testing and build pipelines to container packaging and release workflows, I help teams ship features faster with fewer failures—while retaining auditability and control.

Scalability, Observability & Production Reliability

I build systems with observability-first principles—logging, metrics, tracing, alerting—and reliability-focused engineering practices. I help clients scale workloads, prevent bottlenecks, improve fault tolerance, and achieve consistent uptime. This ensures their backend systems remain resilient even under unpredictable or high-traffic conditions.

Let’s architect it the right way

Design scalable, secure, and resilient systems that power modern AI-driven applications.

I help organizations design cloud-native backend systems that are fast, scalable, maintainable, and aligned with modern engineering standards. This includes microservice architecture, distributed system design, API strategy, containerization, and Kubernetes-driven orchestration. My work focuses on high-performance backend development, event-driven systems, secure integrations, observability frameworks, and DevOps-aligned CI/CD pipelines that keep your platform resilient and future-ready across AWS, Azure, or GCP.

These services are crucial because modern digital products succeed or fail based on their reliability and ability to scale. Without a strong architectural foundation, companies struggle with slow performance, deployment bottlenecks, outages, escalating cloud costs, and inability to evolve quickly. A robust backend architecture ensures your product can support growing traffic, integrate with third-party services safely, adapt to business needs, and provide consistent user experiences—even under high load.

I add value by bringing architectural clarity, operational discipline, and long-term thinking. From building Kubernetes-native workflows to designing APIs that are intuitive and extendable, I ensure your backend becomes a strategic asset rather than a source of complexity. Teams also benefit from improved observability, stronger automation pipelines, and a reduction in firefighting — allowing engineering effort to shift towards innovation instead of maintenance.

Need a scalable, future-proof backend foundation?



Healthcare Informatics Consulting & Domain Expertise

10+ Years of HIS/LIS/EMR Domain Expertise

I bring deep hands-on experience with hospital systems—including HIS, LIS, RIS/PACS, EMR/EHR, billing, pharmacy, and diagnostics—across India, Bangladesh, Bahrain, and South Asia. This domain knowledge helps clients avoid costly architectural mistakes and adopt digital systems that fit real-world clinical workflows, regulatory requirements, and hospital operations.

Healthcare Workflow Design & Digital Transformation

I help hospitals and healthcare organizations redesign patient, clinical, and administrative workflows for digital-first efficiency. From OP/IP journeys to lab automation and radiology workflows, I ensure systems support decision-making, reduce delays, eliminate redundancies, and create seamless patient experiences.

AI for Healthcare Operations

I guide healthcare teams in applying AI responsibly—triage assistants, automated reporting, operational analytics, patient routing, forecasting, and intelligent task automation. My blend of AI engineering and healthcare domain experience ensures solutions are safe, compliant, and aligned with clinical realities—not just tech demos.

Data Interoperability, Coding Systems & Compliance

I help organizations adopt HL7, FHIR, DICOM, LOINC, ICD-10, SNOMED CT, and standardized health data models to ensure clean interoperability. I also advise on HIPAA, GDPR, NDHM/ABDM guidelines, role security, audit trails, and privacy-by-design practices—critical for compliant AI and digital health systems.

EHR Structuring & Telemedicine Architecture

I design structured EHR models, encounter templates, and clinical documentation flows optimized for accuracy, coding, and decision support. I also architect telemedicine platforms, integrating scheduling, triage, video consults, e-prescriptions, and follow-up workflows into a cohesive system.

Technical Guidance for PhD Supervision & Research

I support PhD scholars, supervisors, and research labs with domain-informed technical guidance in healthcare AI, clinical data systems, RAG for medical knowledge, predictive modelling, and digital health architecture. My experience bridges academic research with practical engineering and healthcare operational realities.

Let’s collaborate

10+ years of real-world HIS/LIS/EMR expertise powering digital transformation in healthcare.

With over 10 years of experience in HIS, LIS, EMR, and digital hospital ecosystems, I provide deep healthcare informatics consulting focused on workflow design, system modernization, interoperability, and clinical-admin process optimization. My work includes designing digital hospital workflows, guiding telemedicine architectures, structuring EHR systems, implementing coding standards, ensuring privacy and compliance alignment, and building AI-driven improvements for both clinical and operational processes.

Healthcare technology requires far more than software engineering—it demands a precise understanding of clinical workflows, regulatory requirements, patient safety, and the realities of hospital operations. Many healthcare systems fail because they are built without domain insight, resulting in poor adoption, inconsistent data, documentation gaps, compliance risks, and frustration for clinicians. By blending domain expertise with engineering depth, I help organizations build healthcare systems that are future-ready, human-centered, interoperable, and truly supportive of clinicians and administrators alike.

I add value by bridging the gap between clinical teams, hospital management, product teams, and engineering groups. Whether guiding interoperability (HL7, FHIR, DICOM), architecting EMR components, supporting PhD-level research, or advising on AI-driven clinical/administrative automation, I ensure solutions are correct, compliant, and practically usable in high-pressure healthcare environments. My approach focuses on clarity, safety, and real-world applicability—ensuring that digital transformation genuinely improves healthcare delivery.



Interests & Impact

Social Venture

Community & Social Impact

I lead WARA KarmaYoga, a social initiative focused on healthcare and community development. By leveraging technology and collaborative programs, I help empower communities, improve learning access, and create measurable social impact.

Knowledge Hub

Hindu Texts & Community Knowledge

I run Hindu Texts Simplified , a platform that makes sacred Hindu texts accessible for the average reader. By organizing, simplifying, and presenting these texts digitally, I aim to share knowledge, preserve cultural heritage, and empower readers with clear, understandable content.

BLOG

Curiosity & Exploration

I enjoy inspiring curiosity and learning in others while exploring the world. From bringing math and programming to children, creating technical guides for everyday users, to discovering different cultures and perspectives, I combine creativity, logic, and global awareness to make learning and exploration engaging.