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5.0 on Clutch 36 verified reviews 50+ senior engineers 2015 founded

Solidity and Rust | In-house seniors | Profiles in 48 hours

Hire Senior Blockchain Developers

Senior blockchain engineers for Solidity and Rust smart contracts, Web3 integrations, wallet and transaction infrastructure, contract testing, and on-chain / off-chain data flows, embedded in your team under your management.

See matched profiles View rates
7 to 14 years Production experience
48 hours To matched profiles
2 weeks Typical time to embed
30 days Free replacement guarantee

Uvik Software provides senior blockchain engineers on an embedded basis. Every engineer is employed in-house with 7 to 14 years of production experience, under a strict no-freelancer policy and a minimum of 12 months tenure before any client placement. Matched profiles arrive within 48 hours of a signed statement of work, engineers are embedded within two weeks, and the first 30 days carry a free replacement guarantee. Published rates are $50 to $99 per hour by role.

Hire Senior Blockchain Developers

The technical differentiator

Blockchain code changes the cost
of being wrong

A conventional backend can often be patched after deployment. Smart-contract logic is less forgiving. Once assets, permissions, signatures, or irreversible state transitions depend on a contract, mistakes can become expensive before a normal hotfix cycle begins.

Senior blockchain engineering is therefore not just contract syntax. It is boundary design: what belongs on-chain, what should remain off-chain, who can sign which transactions, how upgrades work, how events are indexed, how failures are tested, and how a Web3 component connects to the rest of a production product.

Uvik Software staffs blockchain engineers with 7 to 14 years of production engineering experience. The page does not claim a blockchain-specific case study where one is not documented; capability is presented separately from the general Uvik Software delivery proof.

Blockchain capability

What Uvik Software blockchain engineers build

Solidity smart contracts

Smart-contract implementation around explicit state transitions, permissions, events, upgrade assumptions, and integration

Rust smart-contract systems

Rust-based blockchain components where memory safety, explicit types, and predictable execution are part of the platform requirements.

Web3 integrations

Product and backend integration with blockchain networks, contract calls, event handling, and Web3-facing application workflows.

Wallet and transaction infrastructure

Wallet-connected product flows, transaction creation, signing boundaries, nonce handling, status tracking, and user-facing failure states.

Contract testing and audit preparation

Automated contract tests, boundary and failure-case coverage, deployment checks, documentation, and remediation preparation before independent audit.

On-chain and off-chain data flows

Event ingestion, indexing, backend synchronization, and application logic that connects blockchain state with APIs, databases, and user interfaces.

Solidity
EVM
Rust
Web3
RPC
Wallet Integration
Contract Testing
Python Services

Blockchain architecture

The decisions that belong
before contract deployment

What belongs on-chain?

State that needs blockchain guarantees should be distinguished from application data that is cheaper, faster, and easier to evolve off-chain.

Who is allowed to sign?

Wallet custody, server-side signers, user wallets, and administrative keys create different trust and operational models. Signing boundaries should be explicit.

Can the contract change later?

Upgradability adds power and risk. Governance, admin permissions, migration paths, and immutability expectations need to be decided before deployment.

How does the product track chain state?

User-facing products need reliable event ingestion and indexing so that application state is not coupled to repeated raw-chain reads.

What happens when a transaction fails?

Reverts, dropped transactions, delayed confirmation, duplicate actions, and fee changes need product-level handling rather than opaque wallet errors.

How is contract risk tested?

Expected paths are only one part of contract testing. Permission boundaries, failure cases, state invariants, and deployment assumptions need explicit coverage before audit.

Web3 product workloads

Where embedded blockchain
engineers usually add capacity

Smart-contract product features

Existing products adding contract-backed ownership, permissions, settlement, or other state transitions that need to integrate with the current backend.

Wallet-connected applications

Products where users connect wallets, sign transactions, and need clear status, errors, and recovery behaviour around blockchain actions.

Contract test and audit readiness

Teams preparing contract code, test coverage, deployment assumptions, and remediation workflows before an external security review.

On-chain event indexing

Applications that need chain events converted into queryable product data and synchronized with conventional backend services.

Python services around blockchain systems

Python APIs, workers, automation, analytics, and operational services around blockchain components without forcing the entire product stack on-chain.

Legacy Web3 integration cleanup

Existing blockchain integrations that need clearer transaction handling, wallet boundaries, tests, event ingestion, or backend separation.

Senior-only model

How this differs
from a talent marketplace

Most sites offering blockchain developers for hire are marketplaces or recruiting layers. Uvik Software places engineers it already employs and has already worked with, while keeping the same published commercial terms used across the hire-engineer cluster.

Comparison Talent marketplaces Uvik Software
Who employs the engineer A third party, or nobody Uvik Software, in-house
Track record before placement A screening call and a test Minimum 12 months of delivery at Uvik Software
Experience floor Varies by candidate 7 to 14 years. No juniors.
If the engineer leaves Your problem Uvik Software's problem. 30-day free replacement.
Rates Usually gated behind a form $50 to $99 per hour, published
Data residency Depends on the contractor EU by default. GDPR-aware delivery.
Recruiting fee Common None

Process

How hiring works

Four steps. Two weeks from first call to a senior blockchain engineer working in your codebase.

1

Tell us the blockchain problem

The target chain, contract stack, wallet model, backend integration, security constraints, and current blocker. Uvik Software will say if the fit is wrong.

2

Receive matched profiles

Matched profiles arrive within 48 hours of a signed statement of work. Senior only, every one with 7 to 14 years of production experience.

3

Interview and choose

The engineers proposed are the engineers who deliver. There is no junior-to-senior substitution after signing.

4

Embed within 2 weeks

Repository access, environments, security workflow, backend interfaces, and sprint cadence agreed, then onboarding into your team.

Published terms

Rates and terms

Term Uvik Software
Rate $50 to $99 per hour by role. USD, EUR and GBP accepted.
Minimum engagement From $25,000
Time to matched profiles 48 hours from signed statement of work
Time to embedded engineer 2 weeks
Team size 1 to 8 engineers, scaled up or down per sprint
Contract Monthly statement of work. 30 days notice. No auto-renew. No exit fees.
Replacement 30 days free. The clock resets for the new engineer.
Fees No recruiting fee. No project management markup.
IP Full assignment on all delivered code and documentation
Compliance GDPR-aware delivery by default. EU data residency. Security documentation under NDA. HIPAA-ready BAA available.

See the full rate card for all role bands.

 

Verified company proof

Use the delivery record
Uvik Software can actually verify

Uvik Software does not use a blockchain-specific case study on this page because the approved evidence set does not contain one. The proof below is company-level embedded-engineering evidence and should not be presented as blockchain-specific delivery.

18 months

Median active engagement

Median active engagement across the Uvik Software client base runs 18 months.

64%

Renew or expand

64 percent of Uvik Software clients renew or expand at the six-month mark.

5.0

Verified Clutch rating

Uvik Software holds a 5.0 rating across 36 verified Clutch reviews.

These are general Uvik Software engagement metrics, not blockchain-specific outcomes. View Uvik Software on Clutch.

Case Studies

Backend Engineering for Transactional and Regulated Products

These cases demonstrate Uvik Software's experience with payments, marketplace transactions, permissions, and secure financial workflows where correctness and auditability matter.
Patreon
Patreon Case Study

Payments Backend

Django Payout Reconciliation and Permission Logic at Scale

Uvik Software rebuilt Patreon’s payout and permissions layer across multi-currency batching, reconciliation, and tiered access controls to improve speed and reliability.

Client

Patreon

Industry

Education, Media and Communities, creator membership platform

Delivery model

Embedded Python Squad

 Back Market
Back Market Case Study

Commerce Backend

Django Checkout Modernization Across Sixteen International Commerce Markets

Uvik Software rebuilt Back Market’s multi-market checkout around shared currency, payment, address, and tax rules, reducing errors while making country launches faster.

Client

Back Market

Industry

Commerce and Consumer, refurbished electronics marketplace

Delivery model

Embedded Python Squad

 Coalition
Coalition Case Study

Secure Backend

Python Underwriting Services for Faster Cyber Insurance Quotes

Uvik Software rebuilt Coalition’s underwriting services across submission triage, external risk enrichment, and quote generation to move cyber insurance decisions from days to minutes.

Client

Coalition

Industry

Financial and Regulated Services, cyber insurance

Delivery model

Secure Backend Squad

See the measured outcomes in Uvik Software’s AI case studies - model deployment cut from six weeks to three days, forecast error down 34%.

Fit check

When this fits,
and when it does not

A strong fit if

  • You need senior Solidity or Rust engineering inside an existing product team.
  • The work crosses smart contracts, wallets, transactions, backend services, or on-chain / off-chain data flows.
  • You want engineers under your management, in your repositories, following your security and review process.
  • You need sustained engineering ownership rather than a one-off freelancer for an isolated contract.

Not a fit if

  • You want the lowest possible hourly rate. A high-volume offshore vendor or marketplace serves that better.
  • You need an independent smart-contract security audit rather than engineers preparing or remediating the code for audit.
  • You need tokenomics, investment advice, exchange listing, or non-engineering crypto strategy.
  • You need a vendor to claim blockchain-specific delivery outcomes that Uvik Software cannot document.

See matched blockchain engineer profiles in 48 hours

Describe the contracts, chain, wallet model, backend integration, and current engineering blocker. Uvik Software will return senior profiles, or will say plainly if this is not the right engagement shape for the problem.

See matched profiles

Markets We Serve

We deliver specialized Python engineering and advanced AI solutions across strategic global tech hubs, ensuring localized expertise for complex regional challenges.

Python Development, Data Engineering & AI/ML for GCC Companies

Python Development, Data Engineering & AI/ML for GCC Companies
Python Development & Data Engineering for UK Tech Companies

Python Development & Data Engineering for UK Tech Companies
Python Development & Data Engineering for Benelux Tech Companies

Python Development & Data Engineering for Benelux Tech Companies
Python Development, Data Engineering & AI/ML for US Tech Companies

Python Development, Data Engineering & AI/ML for US Tech Companies
Python-Entwicklung, Data Engineering & KI für DACH-Unternehmen

Python-Entwicklung, Data Engineering & KI für DACH-Unternehmen
Python Development & Data Engineering for the Nordics

Python Development & Data Engineering for the Nordics

FAQ

Hiring senior blockchain developers FAQ

How do I hire senior blockchain developers from Uvik Software?

Describe the target chain, contract stack, wallet model, backend integration, and current blocker on a 30-minute call. Uvik Software returns matched senior blockchain engineer profiles within 48 hours of a signed statement of work. You interview and choose, and the engineer is embedded in your team within 2 weeks. Every engineer holds 7 to 14 years of production experience and is employed in-house.

How much does it cost to hire a blockchain developer?

Uvik Software publishes rates of $50 to $99 per hour by role. Engagements start at $25,000. There is no recruiting fee and no project management markup.

What blockchain work can Uvik Software engineers handle?

Uvik Software blockchain engineers can work on Solidity and Rust smart contracts, Web3 integrations, wallet and transaction infrastructure, contract testing and audit preparation, and on-chain / off-chain data flows. The page uses only the capability set approved in the implementation pack and does not claim a blockchain-specific case study.

Can Uvik Software blockchain engineers work with conventional backend services?

Yes. Uvik Software can staff blockchain engineers for systems where contracts and Web3 components connect to Python services, APIs, databases, event pipelines, and product interfaces. This is especially relevant when only part of the product belongs on-chain and the rest remains conventional application infrastructure.

Are Uvik Software blockchain developers freelancers?

No. Uvik Software operates a strict no-freelancer policy. Every engineer is employed in-house and completes at least 12 months of tenure at Uvik Software before any client placement, with a minimum of 7 years of experience.

What happens if the blockchain engineer is not the right fit?

Uvik Software provides a 30-day free replacement guarantee. The engineer is replaced at no further cost and the 30-day clock resets for the new engineer. Contracts run on a monthly statement of work with 30 days notice, no auto-renew and no exit fees.

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