Blockchain App Development for Crypto Platform
Featured Review- AI Development Blockchain Custom Software Development
- $50,000 to $199,999
- Oct. 2024 - Apr. 2025
- Quality
- 5.0
- Schedule
- 5.0
- Cost
- 5.0
- Willing to Refer
- 5.0
"They added real value beyond the scope of the brief."
- Advertising & marketing
- Wroclaw, Poland
- 11-50 Employees
- Online Review
- Verified
4soft developed a blockchain application for a crypto platform. The team handled the creation of a cross-chain, interoperable app with advanced staking functionality and omnichannel support.
4soft's work improved user engagement, increased participation, and enhanced retention. The team demonstrated high professionalism and followed a structured, agile approach. The team was flexible when priorities shifted and proactive, bringing valuable insight and suggestions to improve the project.
The client submitted this review online.
BACKGROUND
Please describe your company and position.
I am the CEO of greenfields sienkiewicz
Describe what your company does in a single sentence.
Our company provides a secure and user-friendly online platform for fiat exchange and crypto
exchange, enabling fast and convenient transactions tailored to users' needs.
OPPORTUNITY / CHALLENGE
What specific goals or objectives did you hire 4soft to accomplish?
- We hired 4soft to implement Interchain Communication, enabling seamless data exchange and cooperation between applications running on different blockchains (Arbitrum and Polygon). This removed the barriers between networks and allowed both users and applications to access richer functionality and broader resources. As a result, users could interact with the application without needing to know which network they were on, while still benefiting from features available only on other chains.
- Another key objective was to enable Cross-chain Staking. 4soft delivered a solution where users could stake tokens on one network (Arbitrum), while receiving rewards or staking outcomes from another (Polygon). This approach allowed for more flexible and efficient staking strategies, and ultimately helped attract more users and liquidity to the ecosystem.
- We also tasked 4soft with building a Multichain / Omnichain presence. The application was developed to operate simultaneously across multiple chains, allowing users from various blockchain environments to access the same features without needing to migrate assets. No matter which network a user started on, they could fully utilize the app and its services, ensuring a consistent and unified experience across ecosystems.
SOLUTION
How did you find 4soft?
Referral
Why did you select 4soft over others?
High ratings
How many teammates from 4soft were assigned to this project?
2-5 Employees
Describe the scope of work in detail. Please include a summary of key deliverables.
The scope of work focused on building a cross-chain, interoperable blockchain
application with advanced staking functionality and omnichain support. 4soft was
responsible for the full development lifecycle — from solution architecture and smart
contract development to integration, testing, and deployment.
Key deliverables included:
● Interchain Communication Layer:
A custom interoperability layer that enabled real-time data exchange and
function execution between Arbitrum and Polygon, allowing applications to
interact across chains seamlessly.
● Cross-chain Staking Module:
A mechanism that allowed users to stake tokens on Arbitrum and receive
rewards or staking results sourced from Polygon. This module introduced new
possibilities for staking strategies and liquidity optimization.
● Omnichain Application Architecture:
A unified application framework that runs on multiple blockchains
simultaneously, allowing users to access services from any supported network
without migrating assets.
● Smart Contract Development:
Custom-built, audited smart contracts tailored to handle cross-chain logic,
staking mechanisms, and multi-network coordination.
● Backend Services & Orchestration:
A set of APIs and background services responsible for orchestrating
cross-chain operations, ensuring data consistency and synchronization across
networks.
● Security Audits & T esting:
Comprehensive QA processes, including unit testing, integration testing, and
security reviews to ensure the robustness of all components.
● Deployment & Support:
Assistance with deployment on mainnet environments, along with ongoing
support for updates and optimizations as needed.
This end-to-end delivery ensured a fully operational, secure, and user-friendly
multichain product capable of scaling across different ecosystems.
RESULTS & FEEDBACK
What were the measurable outcomes from the project that demonstrate progress or success?
The project resulted in several measurable outcomes that clearly demonstrated both technical
success and user adoption. Following the implementation of interchain communication and
omnichain architecture, we observed increased user engagement across both Arbitrum and
Polygon networks. Users interacted more freely with the application, without needing to
understand or switch between chains, which led to a more seamless and satisfying experience.
The cross-chain staking functionality gained traction quickly after launch. A large number of
users began staking tokens on Arbitrum while receiving rewards from Polygon, which in turn
contributed to higher levels of participation and improved retention. This flexibility also
attracted new users and increased the overall attractiveness of the staking model.
Describe their project management. Did they deliver items on time? How did they respond to your needs?
4soft demonstrated a high level of professionalism in project management throughout the
collaboration. They followed a structured, agile approach with regular syncs, clear milestones,
and transparent communication. All key deliverables were completed on time or ahead of
schedule, and they adapted quickly when priorities shifted or when new requirements
emerged.
One of the most valuable aspects of working with 4soft was their responsiveness. Whether it
was a technical clarification, strategic discussion, or last-minute adjustment, they were always
available and proactive. Their team not only executed on the development side but also
brought valuable insight and suggestions that improved the overall direction of the project.
They weren’t just a service provider — they felt more like a true partner. That mindset really
made a difference, especially in a project that spanned multiple chains and required a deep
understanding of complex blockchain mechanics.
What was your primary form of communication with 4soft?
In-Person Meeting
What did you find most impressive or unique about this company?
What stood out the most about 4soft was their deep technical expertise combined with a
pragmatic, solution-oriented mindset. They truly understand the challenges of multichain
development — not just on a theoretical level, but in terms of actual implementation,
interoperability, and user experience. That’s rare.
We were especially impressed by their ability to anticipate potential issues before they became
problems, and by how they consistently came to the table with ideas — not just tasks. Whether it
was optimizing our cross-chain architecture or suggesting better ways to handle user flows,
they added real value beyond the scope of the brief.
Also, their flexibility and willingness to adapt mid-project, without compromising on quality or
timelines, made them feel more like a strategic partner than a typical vendor. It’s clear they care
about the success of the product as much as we do.
Are there any areas for improvement or something 4soft could have done differently?
No, I don’t see any areas for improvement – 4soft carried out their work very professionally and
reliably. Everything went smoothly and met our expectations.
RATINGS
-
Quality
5.0Service & Deliverables
-
Schedule
5.0On time / deadlines
-
Cost
5.0Value / within estimates
-
Willing to Refer
5.0NPS