End-to-End Software
Engineering Services

From initial architecture design to production deployment and ongoing support — Zishnu LLC delivers full-spectrum custom software services tailored to enterprise requirements across 11 specialized disciplines.

Engineering

Software Engineering

Architecting systems that last decades, not sprints.

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Our software engineering practice covers the full lifecycle — from requirements analysis and system architecture to implementation, testing, and deployment. We apply Domain-Driven Design (DDD), SOLID principles, and battle-tested architectural patterns to build systems that scale under enterprise load.

  • Distributed system architecture and design patterns
  • Microservices and event-driven architectures
  • Technical debt assessment and code quality audits
  • CI/CD pipeline design and DevOps integration
  • Performance engineering and load testing

Tech Stack

Node.jsPythonJavaGoPostgreSQLRedisKafka
Engineering

Software Development

Custom software built to your exact specifications.

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We develop bespoke software applications that precisely address your business processes, eliminating the compromises of off-the-shelf solutions. Our agile delivery model ensures continuous value delivery with full transparency at every sprint.

  • Custom enterprise application development
  • Legacy system replacement and modernization
  • Business process automation workflows
  • Internal tooling and admin dashboards
  • Third-party system integration and data synchronization

Tech Stack

ReactNext.jsNode.jsPythonPostgreSQLMongoDB
Product

MVP Development

From validated concept to market in 8–12 weeks.

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We help founders and product teams launch minimum viable products with production-quality code, not prototypes. Our MVP sprints include product scoping, UX wireframing, development, and cloud deployment — everything needed to start capturing real user feedback.

  • Product scoping and feature prioritization workshops
  • UX/UI design and interactive prototyping
  • Rapid full-stack development (8–12 week delivery)
  • Cloud deployment on AWS or Azure
  • Analytics integration and user tracking setup

Tech Stack

ReactNext.jsNode.jsPostgreSQLAWSStripe
AI & ML

AI Development

Intelligent systems that learn, adapt, and automate.

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We build production-grade AI systems — from custom ML models and LLM-powered applications to intelligent automation engines. Our AI engineers have deep expertise in computer vision, NLP, predictive analytics, and generative AI integration.

  • Custom ML model development and training pipelines
  • LLM fine-tuning and RAG (Retrieval-Augmented Generation) systems
  • Computer vision and image recognition systems
  • Predictive analytics and demand forecasting
  • AI-powered chatbots and virtual assistants

Tech Stack

PythonTensorFlowPyTorchOpenAI APILangChainPinecone
Web

Web Development

High-performance web applications at enterprise scale.

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We engineer web applications with Core Web Vitals in mind — fast, accessible, and built to handle millions of users. From complex SaaS dashboards to customer-facing portals, our front-end and full-stack engineers deliver pixel-perfect, performant web experiences.

  • Single-page applications (SPA) with React and Vue.js
  • Server-side rendering with Next.js for SEO-critical apps
  • Progressive Web Apps (PWA) with offline capabilities
  • Enterprise dashboards and data visualization platforms
  • Headless CMS integration (Contentful, Sanity)

Tech Stack

ReactNext.jsVue.jsAngularTypeScriptTailwind CSS
Mobile

Mobile Development

Native performance. Cross-platform efficiency.

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We build mobile applications that users actually enjoy using — with smooth 60fps animations, offline-first architecture, and native device integrations. We deliver for both iOS and Android from a single codebase or native builds depending on your requirements.

  • Cross-platform development with React Native
  • Flutter development for pixel-perfect UIs
  • Native iOS (Swift) and Android (Kotlin) development
  • Push notification systems and real-time features
  • App Store and Google Play submission and optimization

Tech Stack

React NativeFlutterSwiftKotlinFirebaseExpo
Engineering

Desktop Development

Enterprise desktop software with modern UX.

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We develop cross-platform and Windows-native desktop applications for industries where browser-based solutions fall short — manufacturing floor software, medical device interfaces, financial trading terminals, and offline-capable enterprise tools.

  • Cross-platform desktop apps with Electron and Tauri
  • Windows-native applications with .NET/WPF
  • Offline-first architecture with local database sync
  • Hardware integration (printers, scanners, POS systems)
  • Auto-update and enterprise distribution systems

Tech Stack

ElectronTauri.NETWPFSQLiteRust
Engineering

API Development

APIs that power ecosystems, not just features.

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We design and build RESTful and GraphQL APIs that serve as the backbone of your digital ecosystem. Every API we deliver includes comprehensive OpenAPI documentation, authentication, rate limiting, versioning strategy, and monitoring integration.

  • RESTful API design following OpenAPI 3.0 specifications
  • GraphQL schema design and resolver optimization
  • OAuth 2.0 and JWT authentication implementation
  • API gateway setup (AWS API Gateway, Kong)
  • Webhook systems and event-driven integrations

Tech Stack

Node.jsPython FastAPIGraphQLPostgreSQLRedisAWS API Gateway
Engineering

Database Development

Data architecture that scales with your ambition.

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We design database schemas, implement data pipelines, and optimize query performance for applications handling millions of records. Our database engineers have deep expertise in both relational and NoSQL systems, as well as real-time data streaming.

  • Relational schema design and normalization (PostgreSQL, MySQL)
  • NoSQL data modeling (MongoDB, DynamoDB, Cassandra)
  • Database performance optimization and query tuning
  • Data migration and ETL pipeline development
  • Real-time data streaming with Apache Kafka

Tech Stack

PostgreSQLMongoDBRedisDynamoDBKafkaElasticsearch
Cloud & DevOps

Software Modernization

Transform legacy liabilities into competitive assets.

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We rescue and modernize legacy systems — migrating monolithic applications to microservices, re-platforming on-premise infrastructure to cloud, and refactoring codebases to modern standards. Zero-downtime migration is our standard, not a premium.

  • Legacy system assessment and modernization roadmapping
  • Monolith-to-microservices decomposition strategy
  • Cloud migration (lift-and-shift and re-architecting)
  • Database migration with zero downtime
  • API layer development to wrap legacy systems

Tech Stack

AWSAzureDockerKubernetesTerraformPostgreSQL
Consulting

IT Staff Augmentation

Senior engineers embedded in your team, on demand.

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When your team needs to scale fast, we embed vetted senior engineers and IT architects directly into your existing workflow. Our augmentation model provides full-time dedicated resources on flexible contracts — no recruitment overhead, no onboarding delays.

  • Senior full-stack engineers (React, Node.js, Python)
  • DevOps and cloud architects (AWS, Azure, Kubernetes)
  • AI/ML engineers for data science teams
  • Technical project managers and engineering leads
  • Flexible contract terms (3, 6, or 12-month engagements)

Tech Stack

ReactNode.jsPythonAWSAzureKubernetesTerraform

Technologies We
Master

Frontend

ReactComponent-based UI library for complex SPAs
Next.jsSSR/SSG React framework for production apps
Vue.jsProgressive framework for interactive interfaces
AngularEnterprise TypeScript framework by Google
TypeScriptTyped JavaScript for large-scale codebases

Backend & Databases

Node.jsHigh-performance JavaScript runtime for APIs
PythonFastAPI, Django for robust backend services
JavaSpring Boot for enterprise-grade microservices
PostgreSQLACID-compliant relational database at scale
MongoDBFlexible document store for modern apps
RedisIn-memory caching and pub/sub messaging

Cloud & DevOps

AWSEC2, Lambda, RDS, S3, EKS deployment
Microsoft AzureAKS, Azure Functions, Cosmos DB
DockerContainerization for consistent deployments
KubernetesContainer orchestration at enterprise scale
TerraformInfrastructure as Code for cloud provisioning
CI/CD PipelinesGitHub Actions, Jenkins, ArgoCD

AI & Machine Learning

TensorFlowDeep learning framework for production ML
PyTorchResearch-grade ML with production deployment
OpenAI APIGPT-4 and embedding integrations
LangChainLLM application framework and RAG pipelines
PineconeVector database for semantic search
HuggingFaceOpen-source model hub and fine-tuning

Let's Scope Your
Next Project

Schedule a free 30-minute technical discovery call with our architects. We'll review your requirements and provide a detailed proposal within 48 hours.