Hire Solidity Developers

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Hire Remote Solidity Developers

Benjamín S
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12 years of experience
Part-Time

Meet Benjamín, your go-to developer with 12 years of Vue.js, AWS, and SQL expertise.

Skills
  • Vue.js
  • TypeScript
  • Node.js
  • AWS
  • SQL
Miguel C
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10 years of experience
Full-Time

Meet Miguel: A developer with 10 years of experience turning code into solutions.

Skills
  • Ruby
  • Data Visualization
  • Python
  • C++
  • Docker
Daniela T
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5 years of experience
Full-Time

Meet Daniela, a developer from Ecuador. 5 years in, she’s your go-to for Angular, React, and more.

Skills
  • Angular
  • HTML
  • CSS
  • React.js
  • C++
João S
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5 years of experience
Full-Time

João is a skilled developer from Brazil, mastering Python, APIs, and SQL with flair.

Skills
  • Python
  • Machine Learning Basics
  • CSS
  • APIs
  • SQL
Isabella J
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6 years of experience
Part-Time

Isabella is a skilled developer from Costa Rica, mastering C#, Azure, and Docker.

Skills
  • C#
  • Azure
  • Docker
  • Machine Learning Basics
  • HTML
Sebastián R
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11 years of experience
Part-Time

Meet Sebastián, a developer with 11 years of expertise in Kotlin, Swift, AI, and more.

Skills
  • Kotlin
  • Swift
  • AI
  • Machine Learning Basics
  • Data Visualization
Diego L
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12 years of experience
Full-Time

Diego is a seasoned developer from Mexico, mastering Go, Node.js, React, and AWS.

Skills
  • Go (Golang)
  • Node.js
  • HTML
  • React.js
  • AWS
Sofía G
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5 years of experience
Part-Time

Sofía is a dynamic developer from Colombia, mastering JS, React, and Docker for 5 years.

Skills
  • JavaScript
  • HTML
  • React.js
  • TypeScript
  • Docker
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"Over the course of 2024, we successfully hired 9 exceptional team members through Lupa, spanning mid-level to senior roles. The quality of talent has been outstanding, and we’ve been able to achieve payroll cost savings while bringing great professionals onto our team. We're very happy with the consultation and attention they've provided us."

RaeAnn Daly
Vice President of Customer Success, Blazeo

“We needed to scale a new team quickly - with top talent. Lupa helped us build a great process, delivered great candidates quickly, and had impeccable service”

Phillip Gutheim
Head of Product, Rappi Bank

“With Lupa, we rebuilt our entire tech team in less than a month. We’re spending half as much on talent. Ten out of ten”

Dan Berzansky
CEO, Oneteam 360

Lupa's Proven Process

Your path to hiring success in 4 simple steps:
Day 1
Define The Role

Together, we'll create a precise hiring plan, defining your ideal candidate profile, team needs, compensation and cultural fit.

Day 2
Targeted Search

Our tech-enabled search scans thousands of candidates across LatAm, both active and passive. We leverage advanced tools and regional expertise to build a comprehensive talent pool.

Day 3 & 4
Evaluation

We carefully assess 30+ candidates with proven track records. Our rigorous evaluation ensures each professional brings relevant experience from industry-leading companies, aligned to your needs.

Day 5
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Receive a curated selection of 3-4 top candidates with comprehensive profiles. Each includes proven background, key achievements, and expectations—enabling informed hiring decisions.

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Reviews

"Over the course of 2024, we successfully hired 9 exceptional team members through Lupa, spanning mid-level to senior roles. The quality of talent has been outstanding, and we’ve been able to achieve payroll cost savings while bringing great professionals onto our team. We're very happy with the consultation and attention they've provided us."

RaeAnn Daly
Vice President of Customer Success, Blazeo

“We needed to scale a new team quickly - with top talent. Lupa helped us build a great process, delivered great candidates quickly, and had impeccable service”

Phillip Gutheim
Head of Product, Rappi Bank

“With Lupa, we rebuilt our entire tech team in less than a month. We’re spending half as much on talent. Ten out of ten”

Dan Berzansky
CEO, Oneteam 360

“We scaled our first tech team at record speed with Lupa. We couldn’t be happier with the service and the candidates we were sent.”

Mateo Albarracin
CEO, Bacu

"Recruiting used to be a challenge, but Lupa transformed everything. Their professional, agile team delivers top-quality candidates, understands our needs, and provides exceptional personalized service. Highly recommended!"

Rogerio Arguello
Accounting and Finance Director, Pasos al Éxito

“Lupa has become more than just a provider; it’s a true ally for Pirani in recruitment processes. The team is always available to support and deliver the best service. Additionally, I believe they offer highly competitive rates and service within the market.”

Tania Oquendo Henao
Head of People, Pirani

"Highly professional, patient with our changes, and always maintaining clear communication with candidates. We look forward to continuing to work with you on all our future roles."

Alberto Andrade Chiquete
VP of Revenue, Komet Sales

“Lupa has been an exceptional partner this year, deeply committed to understanding our unique needs and staying flexible to support us. We're excited to continue our collaboration into 2025.”

John Vanko
CTO, GymOwners

"What I love about Lupa is their approach to sharing small, carefully selected batches of candidates. They focus on sending only the three most qualified individuals, which has already helped us successfully fill 7 roles.”

Daniel Ruiz
Head of Engineering, Fuse Finance

"We hired 2 of our key initial developers with Lupa. The consultation was very helpful, the candidates were great and the process has been super fluid. We're already planning to do our next batch of hiring with Lupa. 5 stars."

Joaquin Oliva
Co-Founder, EBI

"Working with Lupa for LatAm hiring has been fantastic. They found us a highly skilled candidate at a better rate than our previous staffing company. The fit is perfect, and we’re excited to collaborate on more roles."

Kim Heger
Chief Talent Officer, Hakkoda

"We compared Lupa with another LatAm headhunter we found through Google, and Lupa delivered a far superior experience. Their consultative approach stood out, and the quality of their candidates was superior. I've hired through Lupa for both of my companies and look forward to building more of my LatAm team with their support."

Josh Berzansky
CEO, Proven Promotions & Vorgee USA

“We’ve worked with Lupa on multiple roles, and they’ve delivered time and again. From sourcing an incredible Senior FullStack Developer to supporting our broader hiring needs, their team has been proactive, kind, and incredibly easy to work with. It really feels like we’ve gained a trusted partner in hiring.”

Jeannine LeBeau
Director of People and Operations, Intevity

Working with Lupa was a great experience. We struggled to find software engineers with a specific skill set in the US, but Lupa helped us refine the role and articulate our needs. Their strategic approach made all the difference in finding the right person. Highly recommend!

Mike Bohlander
CTO and Co-Founder, Outgo

Lupa goes beyond typical headhunters. They helped me craft the role, refine the interview process, and even navigate international payroll. I felt truly supported—and I’m thrilled with the person I hired. What stood out most was their responsiveness and the thoughtful, consultative approach they brought.

Matt Clifford
Founder, Matt B. Clifford Consulting

Solidity Developer Soft Skills

Essential soft skills that define exceptional Solidity Developers

Communication

Translate technical details into understandable concepts

Problem Solving

Innovate solutions to development hurdles

Team Collaboration

Foster cooperation in multidisciplinary teams

Adaptability

Quickly adjust to project scope changes

Time Management

Effectively meet tight deadlines

Empathy

Design with user perspectives in mind

Solidity Developer Skills

Core technology capabilities that propel your projects

Solidity Development

Proficient in writing and deploying smart contracts using Solidity language for Ethereum blockchain.

Blockchain Platforms

Experience with platforms like Ethereum and Binance Smart Chain for decentralized application development.

Smart Contract Security

Expertise in identifying and mitigating vulnerabilities like reentrancy and overflow in smart contracts.

Web3.js Integration

Skilled in using Web3.js to interact with Ethereum nodes and blockchain data from web applications.

Ethereum Development Tools

Familiarity with Truffle, Hardhat, and Remix for smart contract development and testing.

Gas Optimization

Ability to optimize smart contracts for lower gas consumption to enhance efficiency and cost-effectiveness.

How to Write an Effective Job Post for Hiring Solidity Developers

This is an example job post, including a sample salary expectation. Customize it to better suit your needs, budget, and attract top candidates.

Recommended Titles

  • Blockchain Developer
  • Smart Contract Engineer
  • DApp Developer
  • Web3 Developer
  • Crypto Developer
  • Full Stack Blockchain Developer

Role Overview

  • Tech Stack: Expert in Solidity, Ethereum, Truffle, and Web3.js.
  • Project Scope: Develop and audit smart contracts; integrate blockchain solutions; ensure network security.
  • Team size: Collaborate within a focused team of 4 blockchain developers.

Role Requirements

  • Years of Experience: Minimum of 3 years in blockchain development.
  • Core Skills: Proficiency in smart contract development, debugging, and deployment.
  • Must-Have Technologies: Strong knowledge of Solidity, Ethereum, and Truffle.

Role Benefits

  • Salary Range: Competitive salary based on experience, $90,000 - $130,000.
  • Remote Options: Flexible remote work options to support work-life balance.
  • Growth Opportunities: Access to blockchain conferences, workshops, and career advancement.

Do

  • Clearly specify skills and experience needed
  • Focus on benefits and salary details
  • Emphasize growth and advancement paths
  • Showcase company culture and values
  • Write in a clear and engaging manner

Don't

  • Don't be ambiguous about job requirements.
  • Don't overlook essential technical skills.
  • Don't make the post excessively long.
  • Don't leave out information about the company.
  • Don't skip the salary details.

Top Solidity Developer Interview Questions

Essential questions for evaluating Solidity Developers

How do you handle versioning in Solidity when working with different compiler versions?

Look for the candidate’s understanding of specifying compiler versions in their contract code using the pragma directive. Consider if they can explain the importance of using specific compiler versions to avoid inconsistencies and bugs.

Can you explain gas optimization in Solidity and how you achieve it?

An ideal candidate will discuss strategies like minimizing storage reads/writes, using fixed-size types, and efficient loops. They should understand the cost implications of operations on the Ethereum network.

What are some common security vulnerabilities in Solidity, and how do you mitigate them?

Expect them to mention vulnerabilities like reentrancy, overflow, underflow, and front-running. They should highlight best practices like using checks-effects-interactions patterns and libraries like OpenZeppelin.

How do you handle token standards like ERC-20 and ERC-721 in your smart contracts?

Look for experience in implementing these standards and understanding their functions and use cases. They should be aware of the nuances and extensions of each standard.

What is your approach to testing and deploying smart contracts?

The candidate should discuss testing strategies using frameworks like Truffle or Hardhat and detail their deployment process. They should ensure thorough testing to prevent costly errors post-deployment.

How would you approach debugging a smart contract that's not behaving as expected?

Look for a methodical approach. The candidate should mention isolating the problem, using tools like Remix or Hardhat, and testing incrementally. Experience with these tools is crucial.

Can you describe a time you optimized a smart contract for gas efficiency?

Listen for specific examples where they reduced gas costs. They should discuss analysis, understanding of gas optimization techniques, and ability to balance functionality and efficiency.

What steps do you take to ensure your smart contract is secure before deployment?

Seek a thorough strategy. The candidate should mention security audits, using libraries like OpenZeppelin, and understanding common vulnerabilities like reentrancy attacks.

How do you handle unexpected errors in smart contract execution?

Look for a calm and systematic approach. The candidate should discuss using logging, understanding error codes, and tools like Ganache to track and resolve issues.

Explain a challenging problem you faced while developing a smart contract and how you solved it.

Focus on problem-solving skills. The candidate should detail the problem, their thought process, and how they leveraged resources or learning to resolve it effectively.

Can you describe a time when you had to work closely with a team on a challenging project?

Look for examples where the candidate collaborated effectively, contributed ideas, accommodated different viewpoints, and maintained positive relationships.

How do you handle communication in remote or distributed teams?

Listen for evidence of clear, consistent communication, use of appropriate tools, proactive updates, and successful virtual collaboration.

Describe a situation where you showed leadership, even if you weren't in charge.

Assess their ability to take initiative, influence others positively, and motivate the team towards a common goal without formal authority.

How do you manage stress and keep yourself motivated during tight deadlines?

Check for coping mechanisms like planning, prioritization, self-care, and maintaining a positive attitude under pressure.

Tell me about a time you had to deal with a difficult teammate. How did you handle it?

Evaluate their conflict resolution skills, empathy, diplomacy, and focus on finding a collaborative solution.

  • Ineffective Communication
  • Resistant to Criticism
  • Weak in Problem Solving
  • Frequently Delayed Deliverables
  • Reluctant to Acquire New Skills

Why We Stand Out From Other Recruiting Firms

From search to hire, our process is designed to secure the perfect talent for your team

Local Expertise

Tap into our knowledge of the LatAm market to secure the best talent at competitive, local rates. We know where to look, who to hire, and how to meet your needs precisely.

Direct Control

Retain complete control over your hiring process. With our strategic insights, you’ll know exactly where to find top talent, who to hire, and what to offer for a perfect match.

Seamless Compliance

We manage contracts, tax laws, and labor regulations, offering a worry-free recruitment experience tailored to your business needs, free of hidden costs and surprises.

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Joseph Burns
Founder

Top Solidity Developer Interview Questions

Essential questions for evaluating Solidity Developers

How do you handle versioning in Solidity when working with different compiler versions?

Look for the candidate’s understanding of specifying compiler versions in their contract code using the pragma directive. Consider if they can explain the importance of using specific compiler versions to avoid inconsistencies and bugs.

Can you explain gas optimization in Solidity and how you achieve it?

An ideal candidate will discuss strategies like minimizing storage reads/writes, using fixed-size types, and efficient loops. They should understand the cost implications of operations on the Ethereum network.

What are some common security vulnerabilities in Solidity, and how do you mitigate them?

Expect them to mention vulnerabilities like reentrancy, overflow, underflow, and front-running. They should highlight best practices like using checks-effects-interactions patterns and libraries like OpenZeppelin.

How do you handle token standards like ERC-20 and ERC-721 in your smart contracts?

Look for experience in implementing these standards and understanding their functions and use cases. They should be aware of the nuances and extensions of each standard.

What is your approach to testing and deploying smart contracts?

The candidate should discuss testing strategies using frameworks like Truffle or Hardhat and detail their deployment process. They should ensure thorough testing to prevent costly errors post-deployment.

How would you approach debugging a smart contract that's not behaving as expected?

Look for a methodical approach. The candidate should mention isolating the problem, using tools like Remix or Hardhat, and testing incrementally. Experience with these tools is crucial.

Can you describe a time you optimized a smart contract for gas efficiency?

Listen for specific examples where they reduced gas costs. They should discuss analysis, understanding of gas optimization techniques, and ability to balance functionality and efficiency.

What steps do you take to ensure your smart contract is secure before deployment?

Seek a thorough strategy. The candidate should mention security audits, using libraries like OpenZeppelin, and understanding common vulnerabilities like reentrancy attacks.

How do you handle unexpected errors in smart contract execution?

Look for a calm and systematic approach. The candidate should discuss using logging, understanding error codes, and tools like Ganache to track and resolve issues.

Explain a challenging problem you faced while developing a smart contract and how you solved it.

Focus on problem-solving skills. The candidate should detail the problem, their thought process, and how they leveraged resources or learning to resolve it effectively.

Can you describe a time when you had to work closely with a team on a challenging project?

Look for examples where the candidate collaborated effectively, contributed ideas, accommodated different viewpoints, and maintained positive relationships.

How do you handle communication in remote or distributed teams?

Listen for evidence of clear, consistent communication, use of appropriate tools, proactive updates, and successful virtual collaboration.

Describe a situation where you showed leadership, even if you weren't in charge.

Assess their ability to take initiative, influence others positively, and motivate the team towards a common goal without formal authority.

How do you manage stress and keep yourself motivated during tight deadlines?

Check for coping mechanisms like planning, prioritization, self-care, and maintaining a positive attitude under pressure.

Tell me about a time you had to deal with a difficult teammate. How did you handle it?

Evaluate their conflict resolution skills, empathy, diplomacy, and focus on finding a collaborative solution.

  • Ineffective Communication
  • Resistant to Criticism
  • Weak in Problem Solving
  • Frequently Delayed Deliverables
  • Reluctant to Acquire New Skills

Frequently Asked Questions

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