Custom Apps & ROI Automation for B2B Teams

B2B tech partner | Custom Apps & ROI automation

We design and ship AI-ready web & mobile platforms - SaaS, marketplaces and internal tools - using JavaScript/TypeScript (React, Next.js, Vue, Nuxt, Angular), Node.js/NestJS and Laravel/PHP, with automation on n8n and Node-RED.

What we do

We help founders and product/ops teams build and grow:

* B2B SaaS platforms and multi-tenant products
* Marketplaces & booking platforms
* Internal tools, admin portals & back-office systems
* AI-powered workflows, agents & chatbots around your existing tools
* Apps that sit on top of solid APIs - from first MVP to production and long-term evolution.

How we start

Most problems are not in the code - they come from unclear scope. We usually begin with a short discovery phase on Upwork to:

* clarify goals, users and constraints
* map key flows and data models
* propose architecture and tech choices
* define milestones, responsibilities and risks
You get a clear, realistic plan before any serious development starts.

How we work during the project

* Break work into milestones with visible progress
* Keep architecture clean and extensible (no quick hacks that become expensive later)
* Ship early usable versions, not “big bang” releases at the end
* Document APIs, flows and configs so your team isn’t locked out
* Stay available for support, iterations and new features - not just “deliver and disappear”

We’re usually a good fit when you treat development as a product investment (MVP, new platform, major refactor), not a one-off $200 bugfix.

Where AI & automation fit in

We add AI and automation where they actually help, not “because it’s trendy”:

* n8n / Node-RED workflows to remove repetitive manual work
* AI-powered outreach & campaign flows (emails, enrichment, routing)
* AI agents and chatbots for support, onboarding and internal tools
* Media & data pipelines: summaries, transcripts, tagging, reports
* Search- and AI-ready data models from day one
If automation doesn’t add ROI, we keep it simple. 

EstoniaEstonia
Kesklinna linnaosa, Narva mnt 7, 10117
+380993013514
$25 - $49/hr
10 - 49
2020

Why Sargas Agency OÜ?

  • Clear scope & plan before coding starts
  • Clean, extensible architecture - no hacks
  • AI & automation only where ROI is real

Service Focus

Focus of Mobile App Development
  • React Native - 35%
  • Enterprise Apps - 20%
  • Firebase - 20%
  • Food Delivery App - 10%
  • Home Services App - 10%
  • Dating App - 3%
  • Flutter - 2%
Focus of Web Development
  • NextJS - 25%
  • Vue.js - 15%
  • Sass - 15%
  • React Router - 12%
  • HTML5 - 8%
  • CSS3 - 8%
  • Webpack - 5%
  • Nginx - 4%
  • HTML - 3%
  • CSS - 3%
  • PL/SQL - 2%
Focus of Software Development
  • Javascript - 13%
  • ReactJS - 12%
  • Node.js - 10%
  • TypeScript - 10%
  • Laravel - 7%
  • PHP - 5%
  • AngularJS - 5%
  • API Development - 5%
  • GraphQL - 4%
  • MongoDB - 4%
  • Agile - 3%
  • Mongoose - 3%
  • Material-UI - 2%
  • WebSockets - 2%
  • React Redux - 2%
  • Redis - 2%
  • Ajax - 1%
  • auth0 API - 1%
  • Bitbucket - 1%
  • Linux - 1%
  • PhpStorm - 1%
  • Rust - 1%
  • Ubuntu - 1%
  • Shell script - 1%
  • Swagger - 1%
  • Svelte - 1%
  • Payment Gateway Development - 1%
Focus of E-commerce Development
  • Custom E-commerce - 50%
  • Headless Commerce - 30%
  • Bigcommerce - 20%
Focus of IT Services
  • API Integration - 19%
  • MySQL - 15%
  • PostgreSQL - 15%
  • IT Consulting - 10%
  • Database Administration - 8%
  • SQL - 8%
  • Outsourcing - 5%
  • Web Scraping - 5%
  • MariaDB - 4%
  • Cyber Security - 3%
  • IT & Networking - 3%
  • Amazon DynamoDB - 3%
  • Banking as a Service - 2%
Focus of Cloud Computing Services
  • SaaS - 50%
  • Amazon (AWS) - 15%
  • AWS S3 - 10%
  • Amazon EC2 - 8%
  • Amazon CloudFront - 5%
  • AWS Lambda - 5%
  • Heroku - 4%
  • Twilio - 3%
Focus of Game Development
  • Casino Game Development - 50%
  • Online Casino Game Providers - 50%
Focus of Bot Development
  • Chatbot Development - 50%
  • Slack - 15%
  • Telegram - 15%
  • Facebook Messenger - 10%
  • Crypto Trading Bot Development - 10%
Focus of Blockchain Development
  • Smart Contract Development - 50%
  • Private Blockchain Development - 20%
  • Ethereum - 15%
  • Wallet Development - 15%
Focus of Artificial Intelligence
  • AI Integration & Implementation - 20%
  • AI Agent Development - 20%
  • Generative AI - 15%
  • ChatGPT Development & Integration - 12%
  • LLM Development - 10%
  • OpenAI - 8%
  • AI Consulting - 7%
  • Speech & Voice Recognition - 5%
  • Vibe Coding - 3%
Focus of Implementation Services
  • Hubspot (CRM) - 50%
  • Zoho (CRM) - 50%
Focus of DevOps
  • Docker - 40%
  • Kubernetes - 30%
  • Docker Swarm - 10%
  • Git - 5%
  • CI/CD - 4%
  • DevOps Implementation - 4%
  • AWS DevOps - 3%
  • Terraform - 3%
  • Jenkins - 1%

Sargas Agency OÜ's exceptional Maintenance & Support services give clients a considerable advantage over the competition.

Industry Focus

  • Startups - 20%
  • Information Technology - 15%
  • E-commerce - 12%
  • Real Estate - 8%
  • Transportation & Logistics - 7%
  • Healthcare & Medical - 6%
  • Education - 5%
  • Enterprise - 5%
  • Other - 22%

Client Focus

80% Small Business
20% Midmarket Business

AI Tools & Purpose

n8nn8n

Workflow automation to cut manual tasks

Node-REDNode-RED

Data pipelines & integration flows

OpenAI APIOpenAI API

AI agents, chatbots & content processing

GitHub CopilotGitHub Copilot

Accelerated development & code review

ClaudeClaude

AI coding assistant and technical writing

GrammarlyGrammarly

Proofreading client docs and proposals

CanvaCanva

Quick visuals for presentations and decks

CodexCodex

Code generation and review automation

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