Senior Backend & AI Engineer | Healthcare Data Systems

Sanjoy Roy

Building reliable AI-enabled backend systems and healthcare-aware data platforms.

I design and build cloud-native backend systems and AI-enabled data platforms for complex, data-intensive environments. My work focuses on integrating AI into production systems responsibly and reliably, with attention to scalability, observability, privacy, and governance rather than short-term novelty.

Alongside engineering, I bring over a decade of hands-on experience in healthcare informatics, including diagnostics, HIS/LIS workflows, data interoperability, and clinical process optimization. This exposure has shaped a practical understanding of how real healthcare data behaves—fragmented, regulated, and often misaligned with idealized AI assumptions.

I am particularly interested in how AI systems operate under privacy and decentralization constraints, how access design and governance affect trust and misuse risk, and how healthcare data can be used ethically and effectively for intelligent systems. My work sits at the intersection of backend engineering, healthcare data, and trustworthy AI, with a focus on systems that remain usable and dependable in real-world settings.

What I Work On

Cloud-Native Backend Engineering & System Architecture

I design and build robust, cloud-native backend systems that form the foundation for reliable, AI-enabled applications. My work spans distributed APIs, microservices, data processing pipelines, containerization, and DevOps automation—focused on systems that scale predictably under real-world load. My approach emphasizes clarity, reliability, and long-term maintainability. Rather than chasing architectural novelty, I focus on well-structured systems that are easy to evolve, observe, and integrate with advanced analytics or AI components over time. This allows engineering teams to move faster without accumulating hidden operational risk. Organizations value this work because strong backend foundations are a prerequisite for trustworthy AI, secure data access, and sustainable digital platforms across AWS, Azure, and GCP.

Healthcare Informatics & Clinical Data Systems

I bring over a decade of hands-on experience in healthcare informatics, working with HIS, LIS, EMR workflows, clinical data models, interoperability standards, and healthcare operations across the Indian subcontinent and the Middle East. I help hospitals, diagnostics networks, and health-tech organizations design systems that align with clinical workflows, regulatory constraints, and data governance realities. This includes improving data quality, enabling secure data exchange, and supporting secondary data use for analytics or AI—without disrupting care delivery. My strength lies in bridging technology and clinical practice. Clients and collaborators trust this work because it reflects a deep understanding of how healthcare data is actually produced, accessed, and governed in real environments—not how it is idealized in technical diagrams.

AI-Enabled Systems & Intelligent Data Platforms

I design and implement AI-enabled data platforms that operate within real-world constraints such as privacy, governance, and heterogeneous data quality. This includes retrieval-based applications, AI-assisted workflows, and intelligent services integrated into larger backend systems rather than deployed as isolated prototypes. My focus is on reliable and auditable AI integration—ensuring that AI components remain understandable, maintainable, and aligned with organizational responsibilities. I work with teams to embed AI where it adds measurable value, while maintaining transparency and control over data access and system behavior. This work is particularly relevant in data-sensitive domains such as healthcare, where AI systems must operate responsibly under regulatory and ethical constraints, and where long-term trust matters more than short-term experimentation.

Cloud-Native Backend Engineering & System Architecture

Modular Backend & Service Architecture

I design modular, domain-aligned backend architectures with clear service boundaries and well-defined responsibilities. By applying event-driven and decoupled design principles, I help systems evolve incrementally, reduce hidden dependencies, and remain understandable as they grow in scale and complexity.

API Design & Distributed System Interfaces

I architect secure and well-structured APIs that enable reliable interaction across distributed systems. My focus is on clear contracts, predictable behavior, and versioned evolution—ensuring data exchange remains stable, auditable, and resilient as systems and integrations expand.

Containerization & Orchestrated Deployments

I package and deploy backend services using container-based workflows and orchestrated environments such as Kubernetes. This enables consistent runtime behavior, controlled rollouts, and repeatable deployments across development, staging, and production environments.

Backend Performance & Resource Efficiency

I build backend systems designed for predictable performance, concurrency control, and efficient resource utilization. By focusing on clean execution paths, caching strategies, and data-access patterns, I help systems remain responsive and stable under sustained operational load.

CI/CD, Automation & Operational Discipline

I design automated build and deployment pipelines that support disciplined software evolution. This includes testing, release automation, and controlled rollout strategies—helping teams introduce change safely while maintaining traceability and operational confidence.

Observability, Reliability & System Health

I build systems with observability-first principles, incorporating logging, metrics, tracing, and alerting as core design concerns. This enables teams to understand system behavior, detect anomalies early, and maintain reliability as usage patterns and workloads evolve.

Let’s design the foundation properly

Building reliable, scalable backend systems that support real-world AI, healthcare, and data-intensive applications.

I work on the design and evolution of cloud-native backend systems that form the foundation for modern digital platforms. This includes service architecture, distributed system interfaces, data-processing pipelines, containerized deployments, and operational workflows across AWS, Azure, and GCP. The focus is on building systems that remain understandable, secure, and maintainable as they grow in scale and complexity.

Strong backend architecture is critical because reliability, data integrity, and operational stability determine whether digital products can evolve safely over time. Without clear architectural foundations, organizations often face cascading failures, brittle integrations, escalating operational costs, and limited ability to introduce new capabilities such as analytics or AI. A well-designed backend enables controlled growth, predictable behavior, and confident change.

I help teams achieve this by bringing architectural clarity and operational discipline. This includes defining clear service boundaries, designing stable APIs, embedding observability and automation from the outset, and ensuring deployments and changes are traceable and reversible. Rather than optimizing for short-term delivery, the goal is to create backend systems that support long-term reliability, governance, and responsible innovation.

If you are building or evolving a platform where reliability, scalability, and trust matter, we can discuss how to establish a backend foundation that supports your long-term goals.



Healthcare Informatics & Clinical Data Systems

Clinical Systems & Healthcare IT Foundations

I bring extensive hands-on experience with core healthcare systems, including HIS, LIS, EMR/EHR, RIS/PACS, billing, pharmacy, and diagnostics. This foundation enables me to design and evaluate digital systems that fit real clinical workflows, regulatory requirements, and operational realities across diverse healthcare settings.

Clinical Workflow Modeling & Digital Transformation

I work with healthcare organizations to model and improve patient, clinical, and administrative workflows for digital environments. From outpatient and inpatient journeys to laboratory and radiology workflows, my focus is on reducing friction, improving data continuity, and supporting decision-making without disrupting care delivery.

Clinical Data Quality, Structure & Governance

I help healthcare teams design structured clinical data models and data capture practices that support accuracy, traceability, and secondary use. This includes attention to data quality, lifecycle management, access control, and governance—critical for analytics, reporting, and AI-enabled applications.

Interoperability Standards & Regulatory Alignment

I support adoption of healthcare interoperability standards such as HL7, FHIR, DICOM, LOINC, ICD-10, and SNOMED CT, enabling reliable data exchange across systems. I also advise on regulatory alignment, auditability, and privacy-by-design practices essential for compliant digital health and AI platforms.

EHR Structuring & Telehealth System Design

I design structured EHR documentation models, encounter templates, and clinical workflows that support clarity, coding accuracy, and continuity of care. I also architect telehealth systems that integrate scheduling, triage, consultations, prescriptions, and follow-up into coherent clinical workflows.

Responsible AI Readiness for Healthcare Data

I help healthcare organizations prepare their data systems for responsible AI use by addressing privacy constraints, access controls, and governance requirements. This work focuses on ensuring AI initiatives are grounded in realistic clinical data practices rather than experimental or demo-driven deployments.

Let’s discuss your healthcare data challenges

Designing clinical data systems that align with real workflows, governance, and long-term healthcare realities.

I work on the design, evaluation, and evolution of healthcare information systems with a focus on clinical data, workflows, and interoperability. This includes HIS, LIS, EMR/EHR environments, diagnostic systems, and supporting data infrastructures. The emphasis is on building systems that reflect how healthcare is actually delivered—across clinical, administrative, and regulatory contexts—rather than idealized technical models.

Healthcare technology is uniquely challenging because it operates under strict regulatory, ethical, and safety constraints while supporting time-critical decision-making. Systems that lack domain grounding often suffer from poor adoption, inconsistent data capture, interoperability failures, and compliance risk. Strong clinical data foundations are essential not only for operational efficiency, but also for analytics, reporting, and responsible use of AI in healthcare.

I help organizations address these challenges by bringing together healthcare domain understanding and systems engineering rigor. This includes modeling clinical workflows, improving data structure and quality, aligning interoperability standards, and embedding governance and access controls into system design. The goal is to ensure healthcare platforms remain usable, compliant, and trustworthy as they evolve and integrate with analytics or AI-enabled capabilities.

If you are working with complex clinical data or evolving healthcare systems where correctness, usability, and trust are critical, we can explore how to strengthen your healthcare data foundations.



AI-Enabled Systems & Intelligent Data Platforms

AI-Orchestrated Workflows & System Integration

I design AI-orchestrated workflows that integrate language models with backend systems, APIs, and data services. Rather than isolated AI features, these workflows are embedded into larger system architectures with clear control flow, traceability, and operational boundaries—supporting complex, multi-step processes in a predictable and maintainable way.

Retrieval-Based AI & Knowledge-Grounded Systems

I build retrieval-based AI systems that ground language models in verified, domain-specific data sources. This includes document processing, indexing, and retrieval pipelines designed to improve factual accuracy, transparency, and reproducibility in AI-assisted applications.

Semantic Search, Embeddings & Knowledge Linking

I design semantic search and embedding pipelines that enable contextual discovery across structured and unstructured data. By combining vector representations with metadata and relational structure, I help systems support explainable retrieval and richer information linkage.

LLM-Integrated Data Processing Pipelines

I integrate language models into data processing pipelines for tasks such as summarization, extraction, and analysis, while maintaining clear boundaries between automated inference and system logic. These pipelines are designed with guardrails, logging, and auditability as first-class concerns.

Model Adaptation, Evaluation & Risk Assessment

I support responsible model adaptation through controlled fine-tuning, prompt design, and systematic evaluation. This includes assessing accuracy, robustness, and failure modes to ensure AI behavior remains consistent and appropriate within operational and regulatory constraints.

AI Architecture & Platform Design Advisory

I advise teams on designing AI-enabled platforms from a system-architecture perspective, covering data flows, integration patterns, scalability, and operational governance. The focus is on reducing long-term complexity and ensuring AI components remain manageable within evolving software systems.

Let’s explore responsible AI integration

Integrating AI into real systems with attention to data grounding, governance, and long-term reliability.

I work on the design and integration of AI-enabled systems that are grounded in real data, embedded within larger software platforms, and governed by clear operational boundaries. This includes retrieval-based AI, semantic search, and AI-assisted data processing pipelines that connect language models with backend services, structured data, and enterprise workflows. The emphasis is on AI as a system component—not a standalone feature.

Organizations often encounter difficulties when moving from AI prototypes to production systems. Common challenges include unreliable retrieval, unclear system behavior, limited observability, privacy concerns, and lack of governance over data access and model outputs. Without careful system design, AI initiatives can introduce operational risk, compliance exposure, and erosion of trust rather than sustainable value.

I help teams address these challenges by designing AI-enabled platforms with clear data grounding, traceable workflows, and explicit control over where and how AI is applied. This includes integrating retrieval pipelines, defining evaluation and monitoring mechanisms, and ensuring AI components remain auditable and maintainable as systems evolve. The goal is to enable AI use that is dependable, transparent, and aligned with organizational responsibilities.

If you are considering AI for data-intensive or regulated environments and want to ensure it is integrated responsibly rather than experimentally, we can discuss how to approach AI-enabled systems in a structured and sustainable way.



Public Engagement & Social Initiatives

Community Health & Social Initiative

Technology for Social Good

I lead WARA KarmaYoga, a non-profit social initiative focused on community development, health awareness, and education. The work emphasizes practical use of technology, collaborative programs, and grassroots engagement to support underserved communities. This initiative reflects my long-standing interest in applying technical skills responsibly in real social and healthcare contexts.

Knowledge & Cultural Preservation

Accessible Digital Knowledge

I curate and maintain a digital knowledge platform that organizes and simplifies classical Hindu texts for modern readers. The focus is on accessibility, structured presentation, and clarity—making complex source material understandable without losing context or meaning.

Writing & Learning

Exploration and Knowledge Sharing

Through writing and educational content, I explore topics spanning technology, learning, and cross-cultural perspectives. This includes simplifying technical concepts, sharing practical guides, and reflecting on how technology, education, and society intersect in everyday life.