CapabilitiesWeb, mobile, APIs, AWS, and models — owned past launch day.

From first sketch to live product — one team owns it end to end.

Web, mobile, APIs, AWS, and AI/ML — architected and shipped together, with observability and support long after launch day.

Explore Services
~/zensolt — production
// zensolt — one team, full stack, production-ready
$ zensolt deploy "your-product"
Architecture …………… ready
Web + Mobile clients … ready
APIs & data layer …… ready
AWS infrastructure …… ready
AI / RAG pipeline …… ready
Monitoring + on-call … ready
production · 99.95% uptime · p95 < 120ms
Sectors we build in: Fintech, EdTech, HealthTech, E-commerce, Logistics, Travel, Insurance, Energy, Government, Security, Healthcare.
About Zensolt Consultants

Engineering partner for teams that need ownership, not handoffs.

We design, build, deploy, and run serious digital products. The same engineers who write your architecture docs answer the pager and tune your cloud bill — so startups, SMEs, and growth-stage companies get continuity from prototype to production.

01 / END‑TO‑END

One team, one timeline.

Product, design, engineering, infra, and AI work together — not handed off across vendors.

02 / ARCHITECTURE

Built to scale.

HLD/LLD, event-driven systems, and cost-aware AWS architectures sized for the next 24 months.

03 / AI‑NATIVE

Real AI, in production.

RAG, conversational, and realtime AI wired into your product — not a sidecar demo.

04 / SUPPORTED

We stay after launch.

Monitoring, on-call, and roadmap partnership so the system you launched keeps running.

Services

The services behind a full product launch.

Engage end-to-end or plug us into a specific layer. Every engagement is staffed to production standards — tests, observability, and clear handover included.

01 / SERVICE

Web Application Development

React, Next.js, and TypeScript apps built for production: App Router, SSR/ISR, edge routes, and performance budgets you can measure.

Next.jsReactTypeScript
02 / SERVICE

Mobile App Development

React Native and Flutter with Expo, native bridges, store-ready release trains, and telemetry from day one.

React NativeFlutterExpo
03 / SERVICE

Backend & API Development

Node.js and NestJS services — REST, WebSockets, queues, and event-driven flows sized for your first scale-up.

Node.jsNestJSServerless
04 / SERVICE

Cloud Infrastructure

AWS-first designs: Lambda, API Gateway, RDS, S3, SQS — cost, reliability, and security reviewed before go-live.

AWSLambdaRDS
05 / SERVICE

DevOps & CI/CD

Pipelines, IaC, staging and prod parity, dashboards, and runbooks so releases are routine, not risky.

CI/CDCloudWatchIaC
06 / SERVICE

AI/ML Solutions

RAG, conversational agents, scoring, and forecasting — integrated with auth, audit trails, and guardrails, not bolted on.

RAGLLMVector Search
07 / SERVICE

Real-time Systems

WebSockets, WebRTC, and voice stacks (including OpenAI Realtime and LiveKit) tuned for latency and resilience.

WebRTCWebSocketsLiveKit
08 / SERVICE

Tech Consulting

Architecture reviews, HLD/LLD, and hands-on pairing from discovery through launch and the first post-release quarter.

ArchitectureHLD/LLDAudit
09 / SERVICE

Production Support

Monitoring, logging, SLOs, incident response, and roadmap hygiene so the product you launch keeps earning trust.

MonitoringLoggingOn-call
AI / ML Solutions

AI that lives inside your product.

RAG systems, conversational interfaces, call scoring, and predictive models — designed and deployed alongside the rest of your stack so they're observable, evaluable, and supportable.

End-to-end AI engineering

From prompt design and retrieval architecture to evaluation and production rollout — including realtime voice with OpenAI Realtime API and LiveKit.

  • RAG pipelines with vector search and source-cited answers
  • LLM integrations with prompt versioning and evals
  • Conversational and voice agents with tool-use and memory
  • Call scoring & predictive models on your real data
1
IngestDocuments, calls, events, knowledge bases
2
Embed & indexVector search · chunking · metadata filters
3
ReasonLLM orchestration · tools · structured output
4
EvaluateGrounding · safety · regression tests · CI
5
ServeAPI · realtime voice · audit log · cost guards
Core capabilities

Web, mobile, and cloud — engineered as one system.

Depth in each pillar, with integration tests and shared contracts so your web app, clients, and AWS estate stay aligned under load.

01 — Web Development

Fast, accessible, scalable web apps.

React, Next.js, and TypeScript with SSR, ISR, and edge rendering. Tailwind for design systems that designers and engineers can both move in.

  • Next.js App Router and edge rendering
  • Component libraries and design systems
  • SEO, analytics, and Core Web Vitals
  • Authentication, RBAC, and async processing
app.zensolt.com
02 — Mobile Apps

Cross-platform apps that feel native.

React Native and Flutter — with Expo, native modules, and proper release engineering. We ship to both stores with crash-reporting and update channels in place.

  • React Native, Flutter, Expo, and native modules
  • Offline-first patterns and background sync
  • Push, deep links, and in-app purchases
  • App Store / Play Store release pipelines
GOOD MORNING
Active sessions 1,284
Latency p95 96ms
Errors (24h) 0.02%
Open dashboard
03 — Cloud & Infrastructure

AWS architectures that scale predictably.

Lambda, API Gateway, S3, SQS, RDS, CloudWatch, Cognito, and Amplify — wired together with CI/CD, observability, and cost controls from day one.

  • Serverless and event-driven architectures
  • Database design (MySQL, MongoDB) and scaling
  • CI/CD, monitoring, logging, alerting
  • Cost reviews and reliability SLOs
API GWλ Authλ Ordersλ AIRDSSQSS3
Technologies

Technologies we ship in production.

Filter by discipline to see how we might staff your next build. This is a living inventory — not an exhaustive vendor list.

TS
TypeScript
language
JS
JavaScript
language
Py
Python
language
Jv
Java
language
C
C
language
Rc
React.js
frontend
Nx
Next.js
frontend
Tw
Tailwind CSS
frontend
<>
HTML / CSS
frontend
RN
React Native
mobile
Fl
Flutter
mobile
Ex
Expo
mobile
An
Android
mobile
iO
iOS
mobile
No
Node.js
backend
Ne
NestJS
backend
Ex
Express.js
backend
λ
Serverless
backend
Sq
MySQL
database
Mg
MongoDB
database
λ
AWS Lambda
cloud
Gw
API Gateway
cloud
S3
S3
cloud
Q
SQS
cloud
DB
RDS
cloud
CW
CloudWatch
cloud
Cg
Cognito
cloud
Am
Amplify
cloud
Fb
Firebase
cloud
R
RAG
ai
L
LLM Integrations
ai
C
Conversational AI
ai
V
Vector Search
ai
OA
OpenAI Realtime
ai
Lk
LiveKit
ai
RE
REST APIs
realtime
Ws
WebSockets
realtime
Rt
WebRTC
realtime
Gt
Git
tools
CI
CI/CD
tools
AS
Android Studio
tools
Industries

Domain context, where it counts.

Compliance, real-time data, and uptime expectations vary by sector. We factor that in before we commit to timelines or architecture.

Fintech

Payments, ledgers, KYC/KYB, and infrastructure that stands up to auditors and spikes in traffic.

EdTech

Learning products, live collaboration, media delivery, and progress data at classroom scale.

HealthTech

Patient-facing apps, telehealth flows, and regulated data paths with consent and logging built in.

E-commerce

Storefronts, checkout, catalog, fulfillment integrations, and commerce analytics.

Logistics

Tracking, dispatch, fleet views, and operator consoles that depend on timely, accurate data.

Travel

Bookings, itineraries, flight tracking, and customer support that needs to be available 24/7.

Insurance

Claims processing, underwriting, and risk scoring — built for compliance and scale.

Energy

Grid management, load balancing, and demand response systems that need to be responsive and reliable.

Government

Public services, regulatory compliance, and citizen-facing apps that need to be secure, scalable, and transparent.

Security

Security systems, access control, and compliance audits that need to be fast, reliable, and scalable.

Healthcare

Healthcare systems, patient portals, and telemedicine platforms that need to be fast, reliable, and scalable.

Process

Five steps, no surprises.

A process designed for accountability — measurable progress every two weeks, not a black box that returns three months later.

01 / STEP
Discover
Workshops to align on outcomes, users, constraints, and success metrics. We map the problem before we touch a keyboard.
Product brief
Success metrics
Risk register
02 / STEP
Architect
HLD and LLD covering data, services, infra, and integrations — sized for your first launch and the next 24 months.
HLD / LLD
API contracts
Cost model
03 / STEP
Build
Two-week iterations with working software at the end of every cycle. Demos, not status reports.
Working increments
Test coverage
Live preview
04 / STEP
Deploy
Hardened CI/CD into staging and production with monitoring, logging, alerting, and runbooks ready on day one.
CI/CD pipeline
Observability
Runbooks
05 / STEP
Scale
Performance work, cost optimization, on-call coverage, and a roadmap for the next quarter — not a handover and goodbye.
SLOs
Cost reviews
Roadmap
Case Studies

Representative engagements we've shipped.

Each card summarizes the problem space, stack, and how we operated. Open one for the full narrative, architecture notes, and outcomes we publish alongside the build.

Contact

Start a project with Zensolt Consultants.

Tell us about the problem you're solving. We'll come back to you within 1-2 business days with a Discovery Call slot, a rough plan, and a clear next step.