Full Stack Product
Development and
Payment
Infrastructure
Custom software, fintech infrastructure, payment integrations and scalable digital products.
Software Development
Payment Infrastructure
Telegram Automation
Security and Infrastructure
About
Product technology company
from Estonia
Chainline.io is a product technology company that develops digital platforms, payment infrastructure and scalable software solutions for fintech, crypto and digital businesses.
We work with startups, fintech companies and enterprises that need reliable engineering — from MVP to full-scale production systems.
Software Development
Payment Infrastructure
Security and Infrastructure
Telegram Automation
Core Services
What we build
Full-cycle development across software, payments, security and automation.
Product Development
Digital products end to end
From MVP to full-scale platforms — we own the full development cycle.
MVP Development
Product architecture, prototype and MVP launch.
SaaS Platforms
Multi-tenant, subscriptions, dashboards.
Marketplaces
Vendor management, payment split, orders.
Custom Platforms
Individual digital platforms for unique needs.
Payment Solutions
Built for fintech,
crypto and e-commerce
End-to-end payment infrastructure — from gateway to settlement and antifraud.
Gateway Integration
Card, crypto and alternative payment methods.
Merchant Accounts
Provider selection, onboarding and risk analysis.
Payment Processing
Routing, processing and settlement systems.
Payment Infrastructure
Orchestration, antifraud and reconciliation.
Security and Infrastructure
Security at every layer
Enterprise-grade protection for web, infrastructure, cloud and data.
Web Security
Vulnerability assessment, penetration testing and API security.
Infrastructure Security
Server hardening, firewall and intrusion detection.
Cloud Security
AWS and Google Cloud security, access control.
Data Protection
Encryption, authentication and identity management.
Security Monitoring
Threat detection, log monitoring and incident response.
Technology
Modern stack, proven in production
Frontend
React
Next.js
Vue
Backend
Node.js
Python
Go
Mobile
Swift
Kotlin
Flutter
Infrastructure
AWS
Google Cloud
Docker
Kubernetes
Databases
PostgreSQL
MongoDB
Redis
Blockchain
Web3
Smart contracts
Wallet integration
Industries
Built for digital-first businesses
We work across fintech, crypto, e-commerce and Web3.
Fintech
Payment platforms and financial infrastructure
Crypto
Web3 products, wallets and crypto payments
E-commerce
Marketplaces, checkout and payment setups
SaaS
Multi-tenant platforms and subscriptions
Marketplaces
Vendor management and payment splits
Web3
DeFi, NFT platforms and blockchain integrations
Case Studies
Selected projects
A look at what we've built and the results delivered.
Fintech
Project name
Brief overview of what was built.
Next.jsNode.jsStripe
Result
Brief outcome description
Crypto
Project name
Brief overview of what was built.
ReactPythonWeb3
Result
Brief outcome description
E-commerce
Project name
Brief overview of what was built.
FlutterAWSPostgreSQL
Result
Brief outcome description
How we work
From idea to production
01
Discovery
Goals, requirements and scope
02
Architecture
System design and tech stack
03
Development
Iterative builds, regular demos
04
Testing
QA, performance and security
05
Deployment
Launch, CI/CD and infrastructure
06
Support and Scaling
Monitoring and improvements
Partners and Integrations
Ecosystem we work with
Cloud providers, payment processors and technology partners.
Cloud Providers
AWS
Google Cloud
Payment Providers
Stripe
Mercury
Plaid
Technology Partners
Slack
HubSpot
QuickBooks
Why Chainline
Why teams choose us
Full stack expertise
End-to-end engineering from frontend to infrastructure.
Fintech and payment infrastructure
Deep experience in payment systems.
Security focused architecture
Security built into every layer from day one.
Scalable product development
Architecture built to grow from MVP to enterprise.
Contact
Ready to build
something?
Tell us about your project and we'll get back within 24 hours.
Start Your Project
We'll get back within 24 hours.
Services
All directions of our work
We cover the full spectrum of digital product development.
Services
Software Development
Custom software development — from web applications to enterprise platforms and SaaS products.
Services
Web Development
Frontend Development
Backend Development
Full Stack Development
Custom Software Development
SaaS Development
API Development
Platform Development
Technologies
Development process
01
Discovery
Goals, requirements and scope.
02
Architecture
System design and tech stack selection.
03
Development
Iterative builds with regular demos.
04
Testing
QA, performance and security checks.
05
Deployment
Launch, CI/CD and infrastructure setup.
Collaboration model
Fixed scope
Clear requirements, defined timeline and fixed budget.
Time & material
Flexible scope for evolving products.
Dedicated team
Full engineering team embedded in your process.
Ready to start a project?
We'll get back within 24 hours.
Services
Mobile Development
iOS, Android and cross-platform mobile applications.
Services
iOS Development
Android Development
Cross Platform Development
Mobile App Architecture
Mobile App Maintenance
Ready to start a project?
We'll get back within 24 hours.
Services
UI / UX Design
User interface design, UX research and product design.
Services
UI Design
UX Research
Product Design
Prototype Development
Design Systems
Ready to start a project?
We'll get back within 24 hours.
Services
QA and Testing
Quality assurance across manual, automated, performance and security testing.
Services
Manual Testing
Automated Testing
QA Audit
Performance Testing
Security Testing
Ready to start a project?
We'll get back within 24 hours.
Services
Digital Marketing
Performance marketing, user acquisition and growth strategy.
Services
Performance Marketing
Target Advertising
Social Media Marketing
Growth Marketing
User Acquisition
Conversion Optimization
Ready to start a project?
We'll get back within 24 hours.
Services
Business Development
Market entry, product launch and growth strategies.
Services
Market Entry Strategy
Product Launch Strategy
Growth Strategy
Partnership Development
Sales Funnel Development
Ready to start a project?
We'll get back within 24 hours.
Services
Telegram Bot Development
Automation bots for business processes — from support and payments to CRM integrations.
Подразделы
Telegram Automation Bots
Customer Support Bots
Payment Bots
Crypto Bots
Notification Bots
CRM Integration Bots
Functionality
Automated responses
API integrations
CRM integrations
Payment features
User management
Analytics and statistics
Ready to start a project?
We'll get back within 24 hours.
Block 1
Payment Gateway Integration
We connect your product to the right gateways — card, crypto, alternative methods and subscription payments.
Gateway Integration
Card payments
Alternative payment methods
Crypto payments
Subscription payments
Merchant Accounts
Payment provider selection
Merchant onboarding
Risk analysis
High risk merchants
Block 2
Merchant Accounts
We help you connect to the right provider — from selection and onboarding to risk analysis and high-risk solutions.
Block 3
Payment Processing
We build the processing layer — routing, transaction handling, settlement and monitoring.
Payment Processing
Transaction routing
Payment processing
Settlement systems
Transaction monitoring
Payment Infrastructure
Payment orchestration
Antifraud systems
Transaction analytics
Reconciliation systems
Block 4
Payment Infrastructure
Full payment infrastructure from orchestration to antifraud — built for reliability and scale.
Block 5
Who it's for
Built for digital businesses across fintech, crypto and e-commerce.
Fintech
Crypto platforms
E-commerce
Marketplaces
Subscription services
Block 6
Integration process
01
Consultation
Requirements review
02
Provider selection
Right provider for you
03
Technical integration
Connect and configure
04
Testing
Full QA all flows
05
Launch
Go live with monitoring
Block 7
Ready to set up payments?
Tell us about your project and we'll propose the right payment solution.
Get Payment Solution
We'll get back within 24 hours.
Product Development
Digital products end to end
From MVP to full-scale platforms — we own the full development cycle.
MVP Development
We take your idea from concept to a working product — fast and lean.
Product architecture
Prototype development
MVP launch
SaaS Platforms
Scalable multi-tenant platforms with subscriptions, dashboards and analytics.
Multi tenant architecture
Subscription systems
Admin dashboards
Analytics modules
Marketplace Development
Two-sided marketplaces with vendor management and payment splits.
Vendor management
Payment split
Order management
User management
Custom Platforms
Individual development of digital platforms for unique business requirements.
Security
Security at every layer
Enterprise-grade protection for web, infrastructure, cloud and data.
Web Security
Security for web applications and APIs.
Vulnerability assessment
Penetration testing
Application security review
API security
Infrastructure Security
Protection for server infrastructure.
Server hardening
Network security configuration
Firewall configuration
Intrusion detection systems
Cloud Security
Security for cloud infrastructure.
AWS security configuration
Google Cloud security
Access control management
Cloud monitoring
Data Protection
Protection for data and access.
Encryption systems
Secure authentication
Identity and access management
Data backup systems
Security Monitoring
Continuous monitoring and response.
Threat detection
Log monitoring
Incident response
Security analytics
Need a security audit?
We'll review your infrastructure and recommend the right protection.
Technology
Modern stack,
proven in production
Technologies we use across all layers of the product.
Frontend
React
Next.js
Vue
Backend
Node.js
Python
Go
Mobile
Swift
Kotlin
Flutter
Infrastructure
AWS
Google Cloud
Docker
Kubernetes
Databases
PostgreSQL
MongoDB
Redis
Blockchain
Web3 integration
Smart contracts
Wallet integration
Industries
Built for
digital-first businesses
We work across fintech, crypto, e-commerce and Web3.
Fintech
Payment platforms, financial infrastructure and fintech product development.
Crypto
Web3 products, crypto wallets and blockchain-based payment systems.
E-commerce
Marketplaces, checkout flows, payment integration and order management.
SaaS
Multi-tenant platforms, subscription systems and admin dashboards.
Marketplaces
Vendor management, payment splits, order flows and user management.
Digital Platforms
Custom digital platforms, automation tools and workflow management.
Web3 projects
DeFi, NFT platforms, DAO tooling and blockchain integrations for Web3 businesses.
Case Studies
Selected projects
A look at what we've built and the results delivered.
Fintech
Project name
Brief overview of what was built.
Next.jsNode.jsStripe
Result
Brief outcome description
Crypto
Project name
Brief overview of what was built.
ReactPythonWeb3
Result
Brief outcome description
E-commerce
Project name
Brief overview of what was built.
FlutterAWSPostgreSQL
Result
Brief outcome description
About
Product technology
company from Estonia
We develop digital platforms, payment infrastructure and scalable software solutions.
Company overview
Chainline.io is a product technology company that develops digital platforms, payment infrastructure and scalable software solutions for fintech, crypto and digital businesses.
We work with startups, fintech companies and enterprises that need reliable engineering — from MVP to full-scale production systems.
Company name
Chainline.io OÜ
Jurisdiction
Estonia
Type
Product IT company · Software Development · Payment Infrastructure
Mission
We help digital businesses build reliable products and payment infrastructure — so they can focus on growth, not on engineering problems.
Location
Office
Chainline.io OÜ
Estonia
Legal information
Company name
Chainline.io OÜ
Country
Estonia
Company type
OÜ (Private Limited Company)
Contact
Let's talk about
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