Blockchain Development Services

Blockchain Technology,
Engineered End to End

Six connected services cover the full blockchain development lifecycle — from the first feasibility question to operating the network in production.

Blockchain Consulting & Architecture

Before a line of code is written, we establish whether blockchain is the right technology for the problem — and if it is, exactly how it should be built.

Feasibility & Fit

We assess your process against blockchain trade-offs: decentralization, transparency, immutability and cost. Sometimes the honest answer is a database.

Network Selection

Public, permissioned or hybrid. We evaluate throughput, privacy, compliance and total cost, then document the recommendation.

Architecture Design

On-chain vs off-chain boundaries, data models, smart contract interfaces, key management and integration patterns.

Delivery Roadmap

A milestone plan with estimates, team shape and risk register — the document your stakeholders approve before the build starts.

Smart Contract Development

Contracts are immutable, so we treat every line as production-critical. Written in Solidity or Rust, tested against adversarial scenarios, and reviewed before deployment.

Audit-Ready Contract Engineering

From token standards to complex business logic — escrow, governance, access control and settlement — our contracts are built to pass external review.

  • Standards: ERC-20, ERC-721, ERC-1155, SPL
  • Upgrade patterns with timelocks and multisig
  • Gas optimisation and storage design
  • Full test suites with fuzzing and invariants

Tokenisation

Fungible and non-fungible asset contracts, distribution logic, vesting schedules and compliance hooks.

DeFi & Settlement

Escrow, payment channels, atomic swaps and settlement logic — built with conservative, reviewable code.

Governance

On-chain voting, proposal systems and treasury controls with clear permission boundaries.

Upgrades & Migration

Proxy patterns, migration tooling and rehearsed upgrade procedures with rollback plans.

dApp & Web3 Application Engineering

The on-chain logic is half the product. We build the interface, the backend and the data layer that make blockchain usable by real customers.

Wallet Integration

Wallet connection, transaction signing, network switching and clear transaction states across desktop and mobile.

Frontend Engineering

Responsive applications with readable on-chain state, pending transaction feedback and failure recovery.

Backend & APIs

Services that index on-chain events, cache reads and expose stable APIs to the rest of your product.

Testing & QA

Local network testing, fork testing, end-to-end flows and a release process with preview environments.

Enterprise Blockchain Integration

Blockchain creates value when it connects to the systems your business already runs. We build those bridges.

System Connectors

ERP, CRM, core banking and identity systems connected through hardened APIs and message queues.

Data Pipelines

Indexers and event streams that turn on-chain activity into data your analytics and reporting can use.

Identity & Access

Wallet-based authentication, role mapping and permission models integrated with existing directories.

Compliance Tooling

Audit trails, reporting exports and controls designed with your compliance team in the room.

Smart Contract Security Audits

Independent review for contracts we wrote — and for codebases we did not. Every audit ends with a written report you can share with your stakeholders.

Scope & Threat Model

We define the assets at risk, the trust assumptions and the attack surface before testing begins.

Automated Analysis

Static analysis, symbolic execution and fuzzing to surface common and structural vulnerabilities.

Manual Review

Line-by-line review of business logic, access control, economic assumptions and upgrade paths.

Report & Remediation

A written report with severity ratings, reproduction steps and remediation support through re-testing.

Managed Blockchain Infrastructure

Nodes, gateways and monitoring operated by RelayLink, with defined service levels — so your team can focus on the product.

Node Operations

Validator, full-node and archive-node provisioning, upgrades and failover across providers.

RPC Gateways

High-availability RPC endpoints with rate controls, key management and usage reporting.

Monitoring & Alerting

Block height, peer count, node health, transaction confirmation and contract event monitoring.

Incident Response

On-call engineers, runbooks and escalation paths with defined response times.

Working With RelayLink

Do you work with our existing engineering team?

Yes. Most engagements are collaborative: we provide blockchain depth while your team owns the product context. We can also deliver end-to-end when you do not have blockchain engineers in-house.

Can you take over an existing blockchain codebase?

Yes. We start with a technical review and report, then propose a remediation and delivery plan. Existing contracts can be audited before any further development.

Who owns the code and the intellectual property?

You do. Unless agreed otherwise in writing, all deliverables — source code, contracts, documentation and infrastructure configuration — are owned by the client on final payment.

How do you handle deployment and handover?

Every project includes deployment to your environment, documentation and a handover session. We can stay on for operations and support under a retainer.

Tell Us What You Want to Build

Send us the problem — we will respond with the architecture, the plan and the team it needs.

Request a Proposal