Blockchain Security Expert Intern - AI Track

New York, USA
Full time
Remote
Compensation is not specified
Role
Security Engineer
Description

About the Company

Established in 2018 by esteemed educators from Yale University and Columbia University, CertiK is a groundbreaking entity in blockchain security. Employing state-of-the-art AI technology, CertiK specializes in safeguarding and monitoring blockchain protocols and smart contracts with a vision to enhance cybersecurity. By bringing advanced academic innovations into corporate settings, CertiK facilitates the development of secure and accurate mission-critical applications. Renowned as a rapidly expanding and well-respected organization in blockchain security, CertiK enjoys a prime position in its sector. Noteworthy clients include eminent projects such as Aave, Polygon, Binance Smart Chain, Yearn, and Chiliz. Notable investors backing CertiK's endeavors comprise prestigious VCs like Tiger Global, Coatue Management, Shunwei Capital, and Hillhouse Capital, alongside industry giants such as Coinbase Ventures and Binance.

About the Position

The primary objective of this role is to spearhead the evolution of an intelligent AI agent propelled by large language models (LLMs) to elevate the efficacy of our security audit tools in the realm of blockchain technology. As an Intern specializing in Blockchain Security, you will collaborate closely with our blockchain security team to fuse cutting-edge academic research with real-world applications. Your core duties will encompass the design, optimization, and integration of LLM-driven AI agents engineered to automatically scrutinize smart contracts and uncover potential vulnerabilities. Engaged in research and experimentation, you will explore new methodologies to bolster threat identification and risk evaluation within our security audit platform, actively contributing to enhanced security of blockchain infrastructures.

Responsibilities

  • Work alongside our blockchain security team to devise and implement a large language model (LLM)-powered AI agent for security audit tools.
  • Conduct experiments utilizing innovative AI techniques to enrich threat detection and risk assessment within blockchain ecosystems.
  • Aid in transforming advanced research on AI agents into pragmatic, scalable solutions for security audits.
  • Stay abreast of emerging trends in LLMs, AI agent architectures, and cybersecurity, proactively suggesting enhancements.

Requirements

  • Pursuing or possessing a recent PhD in Artificial Intelligence, Computer Science, or related field, with a strong focus on machine learning, natural language processing, and/or cybersecurity.
  • Profound comprehension of LLM architectures (e.g., transformers) and hands-on expertise in training or fine-tuning such models.
  • Advanced proficiency in Python and hands-on experience with deep learning frameworks like PyTorch or TensorFlow.
  • Basic knowledge of blockchain technology and smart contract development is advantageous.
  • Exceptional analytical skills, problem-solving abilities, and adaptability in a fast-paced, pioneering startup environment.
  • Excellent written and verbal communication skills in English.

Bonus Points

  • Previous research or project involvement in developing AI agents or automated security analysis tools.
  • Exposure to security audit methodologies and vulnerability assessment, particularly within blockchain or smart contract spheres.
  • Familiarity with blockchain programming languages (e.g., Solidity) and platforms (e.g., Ethereum).
  • Contributions to top conferences/journals in AI, NLP, or cybersecurity.
  • Demonstrated capability to translate research insights into practical, production-ready tools.

Target compensation for this role, if based in the US, ranges from $6,000 to $8,000 monthly. The final compensation offered will be predicated on the skills and experience exhibited by eligible candidates.

CertiK welcomes applications for this role continuously.

CertiK provides comprehensive benefits such as medical, vision, and dental insurance, 401(k) plan with company matching, life and accidental death and dismemberment insurance, HSA (with high deductible plan), FSA, alongside flexible paid time off and holidays. For business development sales roles, CertiK also offers a variable commission program.

In compliance with federal regulations, all recruited personnel will be required to authenticate identity and eligibility to work in the US, duly completing the necessary form at the time of hiring.

CertiK remains committed to maintaining an unbiased recruitment process, refraining from any form of discrimination based on age, race, creed, religion, gender, sexual orientation, medical condition, national origin, genetics, military status, or any other legally impermissible criterion during hiring decisions.

CertiK will review applications from candidates with criminal histories in compliance with applicable local and federal directives.

All team members at CertiK are expected to actively champion diversity within their teams and the organization at large.

Skills Required
Avatar
CertiK
Company size
Not specified
Location
United States
Description
Not specified

More Full-time Jobs

Show more

DApp & Smart Contract Developer (Vesting Platform)

Full time
Remote
We are looking for a skilled DApp & Smart Contract Developer to enhance and stabilize our client’s crypto vesting platform. You will diagnose existing issues, improve performance, deliver new features, and ensure seamless coordination between smart contracts and the front end.
This role is ideal for someone who thrives in fast-moving environments, values clean and secure code, and understands the nuances of blockchain-based application architecture.
Responsibilities
Diagnose and resolve issues in vesting smart contracts and their front-end integrations.
Implement new features and system enhancements to improve UX and overall platform performance.
Maintain smooth interaction between the web interface and deployed smart contracts.
Conduct testing, audits, and deployments across testnet and mainnet environments.
Optimize contract logic for performance, security, and gas efficiency.
Collaborate with our engineering team to identify pain points and deliver stable, secure solutions.
Requirements
Proven experience building full-stack decentralized applications.
Strong proficiency in Solidity, JavaScript/TypeScript, and modern frameworks (Angular, React, or Vue).
Hands-on experience with Hardhat or Foundry for smart contract development and testing.
Familiarity with Ethers.js or Web3.js for blockchain interaction layers.
Solid understanding of Ethereum, Polygon, or other EVM-compatible chains.
Experience integrating wallets such as MetaMask and managing on-chain/off-chain data flows.
Strong debugging skills, attention to detail, and a security-first mindset.
Nice to Have
Experience with smart contract security audits and gas optimization techniques.
Knowledge of Node.js-based backend services or API integration layers.
Previous experience with vesting, staking, or token distribution mechanisms.
Project Scope
This role supports a short-to-mid-term initiative focused on stabilizing and enhancing an existing crypto vesting platform. High-performing developers may have opportunities for ongoing collaboration across additional blockchain and product engineering projects.
Hiring Process
Technical Assessment - Selected candidates will complete a short, clearly scoped technical exercises designed solely to evaluate coding approach and smart contract knowledge.
CTO interview - A final discussion to evaluate technical reasoning, architectural thinking, and team fit. Successful candidates may receive an offer through Contra following this conversation.
Payment in Crypto
7,000-12,000
Monthly
See details

Senior Blockchain Developer - Ethereum/PulseChain - GAM3S.GG

Lisbon, Portugal
Lisbon, Portugal
Full time
Remote
About the Job
We're looking for a Senior Blockchain Developer with strong Ethereum/PulseChain smart contract experience to work on our DeFi/GameFi platform. You'll be building and maintaining betting contracts, yield farming mechanisms, token swap systems, and Web3 frontend integrations for our decentralized application on PulseChain.
Key Responsibilities
Smart Contract Development
System Architecture & Integration
Frontend Web3 Integration
Security & Compliance
Performance & Monitoring
Required Technical Skills
Blockchain Expertise
Frontend Web3 Development
Development Tools
Integration & Tools
Payment in Crypto
10,417
Monthly
See details

Senior Go Developer

Full time
Remote
Senior Go Developer (Crypto focus; remote) The company (name withheld till the interview stage) is a non-custodial staking, re-staking, and node hosting platform that delivers advanced, secure infrastructure for institutional and retail investors. With automated services and an intuitive interface, we simplify the process of running full nodes, masternodes, and validators across 77 Proof-of-Stake blockchain protocols, hosting tens of thousands of nodes globally.In addition, we contribute to the blockchain ecosystem by offering complimentary tools and RPC endpoints for over 100 blockchain protocols, enabling users and developers to engage with their preferred blockchain networks and build innovative solutions!We are seeking a strong Senior Go Developer with experience in cryptocurrency. Requirements:Cryptocurrency and Node Experience: Minimum 1.5–2 years of experience working in the cryptocurrency space, specifically with nodes.Extensive experience and expertise in Go development.Russian or Ukrainian language proficiency.Knowledge of Node.js is a plus.Experience working in a remote, asynchronous environment.Familiarity with Slack for communication and collaboration.Working hours:You may start your 8-hour working day between 7 and 11 am GMT+3. For example, from 9 am to 5 pm GMT+3, etc.Remote team spanning from Los Angeles to London to Dubai, with minimal calls and Slack-based communication & decision-making.The team consists of 6-10 members with a strong sense of commitment—many have been with us for over 7 years. What we offer:Full-time job (8 working hours per day, Monday-Friday).Remote work. You may be located in any country, just need a good Internet connection, a powerful computer to work from, and the opportunity to adjust your working schedule for the team.Be part of a fast-growing, highly respected company in the crypto industry.Stability. This is not project work, we consider only the candidates looking for a long-term commitment of 1.5+ years.Work autonomously with a team of like-minded professionals.Engage in challenging and innovative projects with cutting-edge blockchain technologies.Salary will be discussed during the interview. Paid in USDT. Application deadline: ASAPSelection process:1. Fill in the application form - attach your CV & a GitHub portfolio link;2. Have a Zoom interview with Hire5 Recruiter;3. Have a technical Zoom meeting with the developer from the company team;4. Have a quick Zoom interview with the CEO of the company;5. Get hired!
Payment in Crypto
5,000-9,000
Monthly
See details

Web3 + Supabase Developer Needed to Complete BSC Testnet Waitlist & Staking Platform

Washington, USA
Washington, USA
Part time
Remote
📌 Job Description
 
We are building a production-ready Web3 waitlist and dashboard platform using Next.js 15 (App Router), BSC Testnet, Supabase, and Wagmi v2.
The core architecture, database schema, and feature roadmap are already defined. We are looking for an experienced developer to complete, polish, and harden the project.
 
This is not a prototype — the goal is a fully working, deployable system with clean code, security best practices, and proper Web3 UX.
 
🧩 Project Overview
 
The platform includes:
Wallet-based user registration (BSC Testnet only)
Automatic network detection & switching
Supabase-backed user management
Automatic virtual card generation (Bronze / Silver / Gold)
Token staking system with transaction logging
Referral system with rewards tracking
Dashboard with analytics & history
X (Twitter) OAuth integration
Discord bot with XP & invite tracking
A detailed README and database schema are already prepared.
 
✅ Responsibilities
 
You will be responsible for:
 
Completing and stabilizing the Next.js App Router implementation
Finalizing wallet connection & network enforcement (Chain ID 97)
Ensuring Supabase RLS policies are correct and secure
Implementing or completing:
Staking flows (stake, unstake, claim, emergency withdraw)
Referral tracking & reward logic
Dashboard analytics & transaction history
Finalizing X (Twitter) OAuth integration
Reviewing and improving overall code quality & structure
Fixing bugs, edge cases, and UX issues
Preparing the app for Railway deployment
(Bonus) Improving performance and Web3 UX
 
🛠 Tech Stack (Must-Have Experience)
 
Required:
 
Next.js 14/15 (App Router)
TypeScript
Wagmi v2 + WalletConnect
EVM chains (BSC preferred)
Supabase (Postgres, RLS, triggers, SQL functions)
Tailwind CSS
Web3 transaction handling & logging
 
Nice to Have:
 
Discord bot development (Node.js)
OAuth 2.0 (X / Twitter)
Smart contract interaction (staking contracts)
Framer Motion
shadcn/ui / Radix UI
 
🔒 Security Expectations
 
You must be comfortable with:
Wallet validation & chain enforcement
Preventing self-referrals & abuse
Transaction hash uniqueness checks
Secure handling of OAuth tokens
Supabase RLS & role-based access
 
📦 Deliverables
 
Fully working, deployable application
Clean, documented codebase
Verified Supabase schema & policies
Functional staking & referral systems
Deployment-ready build (Railway)
Basic handover documentation
 
⏳ Timeline
 
Estimated duration: 2–4 months
Start: Immediately
Potential for long-term collaboration
 
💰 Budget
 
Open to fixed-price or hourly
Please include:
 
Your estimated timeline
Relevant Web3 / Next.js projects
Any questions or suggestions to improve the system
 
🧠 How to Apply
 
When applying, please answer:
 
Have you built production Web3 apps with Next.js + Wagmi before?
Have you worked with Supabase RLS & SQL triggers?
Share 1–3 relevant projects (GitHub or live links)
What risks or improvements do you see in this architecture?
Generic proposals will be ignored.
Payment in Crypto
4,500
Monthly
See details

Senior Web3 / Crypto Trading Platform Developer

Full time
Remote
PumaPulse is launching a new standalone domain focused on building professional-grade crypto trading platforms and on-chain trading tools. We are seeking an experienced freelance Web3 developer to help design, build, and evolve a scalable trading product with commercialization potential.ResponsibilitiesDevelop crypto trading tools, bots, or SaaS platformsIntegrate with DEXs and on-chain protocols (e.g., Solana, Ethereum)Implement real-time blockchain data monitoring and trade executionEnsure security, performance, and MEV-aware designCollaborate on product roadmap, strategy, and future featuresRequirementsStrong experience in Web3 and DeFi developmentProven work with crypto trading bots or on-chain trading systemsExperience with at least one major blockchain ecosystemSolid understanding of smart contract interaction and security best practicesAbility to deliver production-ready code and communicate clearlyNice to HaveExperience productizing tools into SaaS platformsBackground in advanced trading strategies or MEVPrior work with VC-backed or early-stage Web3 projectsEngagementFreelance / contract roleCompetitive compensation based on experiencePotential for long-term collaborationApply with relevant Web3 projects, GitHub links, and availability.
Payment in Crypto
50-80
Monthly
See details