Custom Node.js Application Development Services
We architect Node.js systems for specific business outcomes: APIs that respond quickly under load, concurrent user handling that scales with growth, and databases that remain stable during traffic spikes.
Our work spans real-time trading platforms, multi-tenant SaaS architectures, and microservices that process high-volume event streams. We select Node.js 18+ LTS with Express.js, Fastify, or NestJS based on performance requirements and system constraints.
Node.js
What We Do
Dev
Ongoing Node.js Development and Support
Application maintenance with defined SLAs and response time commitments. We monitor heap usage, event loop lag, and database connection pools to identify issues before they impact users. Performance optimization is based on profiling data and measurement, not guesswork or premature optimization.
Common Node.js Challenges We Solve
Implement lazy loading and optimize change detection for sub-100ms response times
Architect NgRx solutions for gigabytes of client-side data
Eliminate subscription leaks reducing memory footprint by 70%
Enable independent team deployments with module federation
Handle thousands of concurrent WebSocket connections
Identify heap growth patterns using Node.js built-in profiler and V8 heap snapshots. Fix closure memory retention and remove event listener accumulation.
Profile blocking operations using clinic.js and implement worker threads for CPU-intensive tasks. Monitor and optimize event loop lag to maintain application responsiveness.
Configure connection limits based on actual concurrent query patterns. Implement connection retry logic with exponential backoff for network instability.
Build distributed rate limiting with Redis using sliding window counters. Handle burst traffic without dropping legitimate requests.
Implement proper error boundaries using domains and async hooks. Ensure uncaught exceptions don't crash processes in production.
Automated dependency scanning with npm audit integration. Implement input validation using Joi or Yup schemas, not regex patterns.
Our Node.js Development Workflow
Sprint Planning
Break user requirements into deliverable increments with technical task estimation. Define acceptance criteria and identify architectural decisions that need validation.
Daily Development
2-week sprints with daily standups for blocker resolution. Continuous integration validates code formatting, runs test suites, and checks for security vulnerabilities on every commit.
Code Review & Testing
Peer review for all production code with automated coverage and complexity checks. Load testing with k6 or Artillery using realistic traffic patterns during sprint development.
Sprint Demo & Delivery
Working software delivered every sprint with stakeholder feedback. Blue-green deployments with automated rollback and health monitoring before traffic routing.
Retrospective & Optimization
Sprint retrospectives focus on development velocity and technical debt reduction. Monitoring with Prometheus and structured logging helps inform next sprint priorities.
Continuous Improvement
Database query optimization and performance tuning based on production metrics, not theoretical assumptions.
Why?
Choose Leanware for Node.js Development
5 Years Specialized Expertise
500+ successful deliveries across diverse industries.
AI-Powered Efficiency
40% faster development, reducing costs without compromising quality.
100% US Timezone
Real-time collaboration and immediate issue resolution
Engineering Excellence
Mandatory code reviews, test coverage, and enterprise standards.
Transparent Management
Real-time dashboards with sprint progress and budget visibility
"The proactive approach of Leanware in maintaining code quality is exceptional and shows their dedication to our project; their independent work always meets our quality standards."
- Morgan Venable | Head of Product | Pacifica, CA | Groundlight
Tools
Our Node.js Tech Stack & Tools
Runtime
Frameworks
Testing
Build Tools
Databases
DevOps
Node.js
Development Services
Leanware builds Node.js applications that handle production loads and scale with business demands. Our teams work US hours, ship code daily, and solve the architectural challenges that slow down growth.
Architecture & Design
Industries We Serve with Node.js
Logistics
Supply chain tracking with IoT sensor integration, route optimization algorithms, warehouse management system APIs
Media
Video streaming backends with CDN integration, real-time chat systems supporting 100k+ concurrent users, content management with automated processing
SaaS Platforms
Multi-tenant architectures with proper data isolation, usage-based billing systems, API rate limiting for different service tiers
E-commerce
Product catalog systems handling millions of SKUs, inventory management with real-time updates, payment gateway integration with fraud detection
Healthcare
HIPAA-compliant patient systems with encrypted data storage, telemedicine platforms handling real-time video, medical device integration APIs
Financial Services
Real-time trading systems processing 10k+ transactions/second, payment processing with PCI compliance, regulatory reporting with audit trails
Hear What Startups and Companies Are Saying About Leanware
"Leanware unlocked our frontend dev—now we ship major updates every 2–3 weeks and move faster."
Morgan Venable,
Head of Product Groundlight
“Leanware's adaptability in project methodology greatly enhances our unique startup operations”
Ricardo Patino,
CEO 2MoonCapital
"Leanware is incredibly responsive. Their team is quick to reply and fantastic at tackling problems."
Barb Heathcote,
Manager docbraces
Technical Requirements Analysis
Load specifications, SLA requirements, and integration constraints analysis. Define performance targets and system boundaries before architectural decisions.
Architecture Design
Technology stack selection based on performance needs and system constraints, not industry trends. Document API contracts and data flow patterns.
Sprint Development
2-week development cycles with deployable increments. Code review focused on performance implications, maintainability, and architectural consistency.
Testing & Deployment
Load validation and security scanning before production deployment. Automated deployment pipelines with rollback capabilities and performance monitoring.
Process
Node.js
Development Process
Pricing
Node.js Development Pricing Models
Dedicated Team Model
We prioritize sustainable code architecture and long-term client relationships over short-term quick wins
Proven delivery track record
Completed projects delivered consistently on schedule with measurable client success outcomes
US timezone alignment
Real-time collaboration eliminates communication delays that typically kill development velocity in offshore partnerships
AI-enhanced development workflows
Combines fixed-price phases for defined work with T&M flexibility for evolving requirements. Optimal for projects with known core features but uncertain optimization needs.
Productivity without quality compromise
AI augmentation increases developer output while maintaining rigorous code quality standards and best practices
Leanware is a Trusted Partner for Great American Companies.
FAQ
Frequently Asked Questions
Development begins within one week after architecture review and team assignment. No waiting for resource availability or project queue positioning.
API development: 6-12 weeks. Complex applications: 4-8 months. Timeline depends on integration complexity and performance requirements, not feature count.
Minimum engagement is one month for meaningful contribution. Short-term developers spend too much time on context acquisition instead of problem-solving.
Automated testing with 85%+ coverage requirements, mandatory code reviews, static analysis with complexity limits, and performance benchmarking on every build.
We audit codebases for technical debt, performance issues, and security vulnerabilities first. Clear assessment of current state before any development work begins.
Active LTS versions: Node.js 18 and 20. We provide upgrade paths for older versions including dependency compatibility analysis and breaking change documentation.
Daily progress updates via Slack or Teams, weekly technical reviews with architecture decisions documented, monthly performance metrics reports with specific KPIs.
Standard practice for all engagements. We maintain isolated development environments and follow client security protocols including VPN access and code repository restrictions.
Get Started with Expert Node.js Developers
Transform your vision into reality with Leanware's Node.js expertise.
Our Latin-based team delivers enterprise solutions 40% faster through AI-powered development. Schedule a free consultation or send us an email today and receive a detailed proposal within 2 days.