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Trainee Smart Contracts Developer Jobs in California

De Circle

Reins - Fullstack Engineer

San Francisco, CA · On-site +1

Product/frontend contributor (optional) Focus areas are prioritized as follows: security & smart contracts, full-stack, backend, and product/frontend. Infrastructure/devops is not a current priority.

Orbofi

Designing, implementing, and maintaining scalable and secure smart contracts on EVM-based blockchains * Collaborating with cross-functional teams, including AI/ML engineers, product managers, and ...

IESF AG

Senior Web3 Back End Engineer

San Francisco, CA · On-site +1

The company is growing its valued engineering team and we are looking for a skilled Senior Web3 ... Strong experience integrating with protocols and smart contracts, including complex transaction ...

Harmony

Software Engineer

Palo Alto, CA · On-site

They are seeking a Software Engineer to develop user interfaces for DeFi applications, ensure seamless integration of smart contracts and wallets, and optimize app performance based on community ...

Career Renew

Software Engineer - Web3

San Francisco, CA · Remote

$150K - $250K/yr

Career Renew is recruiting for one of its clients a Software Engineer - Web3 - this is a fully ... Write production smart contracts across multiple virtual machines (EVM, SVM, TVM, and emerging alt ...

Career Renew

Software Engineer - Web3

Los Angeles, CA · Remote

$150K - $250K/yr

Career Renew is recruiting for one of its clients a Software Engineer - Web3 - this is a fully ... Write production smart contracts across multiple virtual machines (EVM, SVM, TVM, and emerging alt ...

D3

Solana Blockchain Engineer

Los Angeles, CA · On-site

Familiarity with Solana smart contracts and blockchain standards such as SPL Token, Metaplex, and ... PLUSES: * DevOps experience with Kubernetes, Digital Ocean, Google Cloud, AWS, and Linux ...

De Circle

Odos - Integrations

San Francisco, CA · On-site +1

$122K - $164K/yr

You'll reverse-engineer smart contract systems, map new AMM logic into our routing framework, extend our Python indexers, and occasionally add Solidity cases to our on-chain executors. As we expand ...

Punch Group

Blockchain Developer

San Francisco, CA · On-site

They are seeking a Blockchain Developer to research, design, and develop enterprise-wide systems ... developing Smart Contracts with Solidity or a similar platform • Experience with software ...

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Trainee Smart Contracts Developer information

What is the difference between Trainee Smart Contracts Developer vs Junior Blockchain Developer?

AspectTrainee Smart Contracts DeveloperJunior Blockchain Developer
CredentialsBasic understanding of blockchain, coding skills, possibly certifications in blockchain fundamentalsSimilar credentials, often with additional programming or blockchain certifications
Work EnvironmentTraining programs, internships, entry-level projects within blockchain teamsEntry-level roles in blockchain projects, supporting development teams
Industry UsageCommon in blockchain startups, tech firms, and companies exploring smart contract solutionsUsed across blockchain companies, fintech, and decentralized app development

The main difference is that a Trainee Smart Contracts Developer is typically in a learning or internship phase focusing specifically on smart contracts, while a Junior Blockchain Developer has a broader role in blockchain development, often involving multiple blockchain components. Both roles require foundational blockchain knowledge, but the trainee position emphasizes skill development in smart contracts first.

How to become a trainee smart contracts developer?

To become a trainee smart contracts developer, you should learn blockchain fundamentals and programming languages such as Solidity or Vyper. Gaining experience with development tools like Remix, Truffle, or Hardhat and understanding smart contract security are also important. Entry-level roles often require a basic understanding of cryptography and decentralized applications, along with a willingness to learn and adapt quickly.
What are the most commonly searched types of Smart Contracts Developer jobs in California? The most popular types of Smart Contracts Developer jobs in California are:
What are popular job titles related to Trainee Smart Contracts Developer jobs in California? For Trainee Smart Contracts Developer jobs in California, the most frequently searched job titles are:
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What cities in California are hiring for Trainee Smart Contracts Developer jobs? Cities in California with the most Trainee Smart Contracts Developer job openings:
Trainee Smart Contracts Developer jobs near you

Reins - Fullstack Engineer

De Circle

San Francisco, CA • On-site, Remote

Full-time

Re-posted 4 days ago

Job description

Reins is building an enterprise stablecoin account that looks and feels like a first-class business bank account, while giving companies the benefits of stablecoin rails and self-custody. Reins makes stablecoins operationally simple for businesses, providing familiar banking features such as ACH, wires (and global equivalents like SEPA), cards, multi-level permissions, approvals, and AML/compliance workflows-combined with stablecoin-native advantages like instant 24/7 global settlement, better control via self-custody, and access to lending, insurance, and exchange markets as DeFi infrastructure matures.
Role Overview
You'll work directly with founder and CEO Sebastian Delgado (co-founder of Fei Labs), taking ownership of meaningful chunks of backend, full-stack, and security work. The role is flexible:
  • Full-stack engineer (preferred)
  • Backend engineer
  • Product/frontend contributor (optional)

Focus areas are prioritized as follows: security & smart contracts, full-stack, backend, and product/frontend. Infrastructure/devops is not a current priority.
Backend & Integrations
  • Design and build backend services connecting custody, fiat rails, policies, and operational workflows
  • Implement and maintain APIs and services for ACH, wires, cards, permissions, AML/compliance workflows, and reporting
Smart Contracts & Security
  • Implement and review Solidity smart contracts, focusing on correctness, safety, and upgradeability
  • Contribute to threat modeling, security reviews, and audit/vendor management

Product & Full-Stack Work
  • Collaborate on the design and implementation of customer-facing applications (currently Dart/Flutter)
  • Translate user and operational needs into product and UX decisions, especially around permissions, approvals, and money flows

Security & Audit Participation
  • Own parts of audit/security review processes for your areas of the stack
  • Coordinate with external security firms
  • Build internal systems and processes with a security-first mindset appropriate for handling customer funds

  • Strong background as a backend or full-stack engineer, ideally in early-stage fintech (Plaid, Brex, Ramp, modern neobanks)
  • Experience with crypto infrastructure, wallets, or stablecoin projects
  • Proficiency in Solidity smart contracts or a willingness to contribute to security-critical logic
  • Familiarity with APIs, integrations, and operational workflows (ACH, wires, cards, permissions, AML/compliance)
  • Ability to collaborate on frontend/product work is a plus (Dart/Flutter experience beneficial)
  • Strong understanding of security best practices for handling customer funds
  • Excellent problem-solving, attention to detail, and autonomy in early-stage environments

Preferred Backgrounds
  • Early engineers at crypto infra/wallet/stablecoin companies
  • Strong backend/full-stack engineers from top fintechs who are crypto-native

Apply