Jobs

Smart Contract Developer - Institutional DeFi ProtocolLocation: Remote - US only (preference for onsite/hybrid in LA)Compensation: $160K - $180KWe are an on-chain financial infrastructure company backed by leading VCs, committed to upgrading financial markets through 24/7 instant settlement . Our first product is an institutional-grade smart contract protocol that facilitates interoperability and liquidity across tokenized financial assets and stable coins. We are seeking a Smart Contract Developer to join our core engineering team and build the foundational infrastructure that bridges traditional finance (Trad Fi) and decentralized finance (DeFi).This is a high-impact, hands-on role where you will design, develop, and deploy highly secure, robust smart contracts for our core protocol. You will architect on-chain logic, optimize gas efficiency, and ensure best-in-class security practices to enable institutional-grade DeFi operations. You will work within a small, senior team, collaborating closely with security auditors, product, and business stakeholders.Key Responsibilities Smart Contract Development: Design, develop, test, and deploy secure smart contracts in Solidity for the core protocol, utilizing development frameworks like Foundry .DeFi Primitives: Implement complex DeFi primitives, including liquidity pools, cross-chain bridges, access control mechanisms, and institutional-grade financial logic.Protocol Architecture: Architect scalable, modular smart contract systems, designing upgradeable contract patterns and governance mechanisms for protocol evolution.Security & Auditing: Conduct thorough internal security reviews and work closely with external auditors to address findings, proactively identifying and mitigating potential vulnerabilities.Quality Assurance: Write comprehensive unit, integration, and fuzzing tests for all smart contract code, contributing to rigorous code reviews.Cross-Chain Work: Implement cross-chain messaging protocols and bridge integ

Smart Contract Developer - Institutional DeFi Protocol

Location: Remote - US only (preference for onsite/hybrid in LA)

Compensation: $160K - $180K

We are an on-chain financial infrastructure company backed by leading VCs, committed to upgrading financial markets through 24/7 instant settlement. Our first product is an institutional-grade smart contract protocol that facilitates interoperability and liquidity across tokenized financial assets and stablecoins. We are seeking a Smart Contract Developer to join our core engineering team and build the foundational infrastructure that bridges traditional finance (TradFi) and decentralized finance (DeFi).

This is a high-impact, hands-on role where you will design, develop, and deploy highly secure, robust smart contracts for our core protocol. You will architect on-chain logic, optimize gas efficiency, and ensure best-in-class security practices to enable institutional-grade DeFi operations. You will work within a small, senior team, collaborating closely with security auditors, product, and business stakeholders.

Key Responsibilities:

Smart Contract Development: Design, develop, test, and deploy secure smart contracts in Solidity for the core protocol, utilizing development frameworks like Foundry.DeFi Primitives: Implement complex DeFi primitives, including liquidity pools, cross-chain bridges, access control mechanisms, and institutional-grade financial logic.Protocol Architecture: Architect scalable, modular smart contract systems, designing upgradeable contract patterns and governance mechanisms for protocol evolution.Security & Auditing: Conduct thorough internal security reviews and work closely with external auditors to address findings, proactively identifying and mitigating potential vulnerabilities.Quality Assurance: Write comprehensive unit, integration, and fuzzing tests for all smart contract code, contributing to rigorous code reviews.Cross-Chain Work: Implement cross-chain messaging protocols

Job DescriptionJob Description

Blockchain is eating the world of financial services and payments. Over the next 10 years, money, payments, and banking will move to blockchain-based networks.

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We’re accelerating this transition. We’re building a global financial ecosystem enabled by this technology. One that advances financial access and opportunity, and reduces costs around sending and receiving money. We started with our flagship stablecoin, AUSD, as an SPL Token, and are building across the infrastructure and application layers to change the way the world transfers value.

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Our team has deep roots in this space, and we’re looking for people who share in our mission to create a more inclusive and effective financial system. Come join us.

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The Role

As our first Lead Smart Contract Engineer, you’ll architect, implement, and own the lifecycle of the Solana programs that power our next- on-chain products. You’ll partner closely with the CTO and mentor junior developers while driving both greenfield protocol launches and iterative upgrades of production programs.

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What You’ll Do

Design architect Solana programs and their on-chain account structures from ideation to mainnet.

Implement test high-performance programs in Rust using the Anchor framework.

Own deployments across Solana clusters (mainnet-beta, devnet, testnet) and manage the program lifecycle.

Maintain upgrade existing programs: oversee Solana\'s upgradeability, manage Program Derived Addresses (PDAs), and ensure stable account data layouts across versions.

Harden security: write comprehensive unit and integration tests, run static analyzers, coordinate external audits, and remediate findings.

Collaborate daily with frontend and product to ship end-to-end DeFi features on Solana.

Mentor lead: set best practices for junior Rust/Anchor engineers and help shape our on-chain architecture roadmap.

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Who You Are

5+ years of experience as a software engineer, with 2+ years of hands-on experience

Contract Senior QA Automation Engineer - Banking APIs

Part-Time (10-15 hrs/week) | Corp-to-Corp or 1099 | Potential to Expand

We are seeking a Senior QA Automation Engineer to support and expand our end-to-end API automation suite for a modern banking platform. This is a part-time engagement (10-15 hours per week) with the potential to grow into a larger role.

What You'll Work On
Automated testing of RESTful banking APIs Payments, transfers, sweeps, ACH workflows Recurring transactions and limit validations Application/KYC onboarding flows Document upload and approval workflows Event/notification validation Schema and financial transaction integrity checks Required Experience 5+ years API automation experience Strong REST API testing (JS/TS, Java, or Python) Experience with financial systems or fintech platforms Deep understanding of complex, multi-step workflows CI/CD integration experience Ability to work independently with minimal oversight Engagement Details 10-15 hours per week Corp-to-Corp or 1099 Flexible schedule Opportunity to expand into a larger engagement
This is a senior-level role suited for someone comfortable owning API automation in a financial services environment.

Location: Lee's Summit An innovative firm is seeking a talented DeFi Smart Contract Developer to join their dynamic team. This role focuses on building secure and efficient smart contracts on the Ethereum Virtual Machine, prioritizing security and collaboration with auditing firms. You'll leverage your expertise in DeFi models, such as derivatives and stable coins, to create high-value contracts that transform traditional trading. If you're passionate about blockchain technology and eager to contribute to cutting-edge projects, this opportunity offers an exciting path to make a significant impact in the DeFi space. #J-18808-Ljbffr

Join Apex Decentralized Systems as a Senior Web3 Smart Contract Engineer. Architect the decentralized future in Austin. Apply now!

Location: Swannanoa Required Skills & Experience Must-Have Experience:3+ years building production smart contracts in SolidityDirect experience building smart contracts for a perpetuals DEX (this is non-negotiable)Deep understanding of perpetual futures mechanics: funding rates, margin systems, liquidation engines, and PnL calculationsProduction experience with oracle integration (Chainlink, Pyth, or custom oracles)Strong grasp of DeFi protocol design patterns and composabilityExperience with Hardhat, Foundry, or similar development frameworksTrack record of contracts handling significant TVL ($10M+) in productionTechnical Expertise:Advanced Solidity optimization techniques and gas efficiency patternsSmart contract security best practices and common vulnerability patternsExperience coordinating external security auditsUnderstanding of Layer 2 scaling solutions (Arbitrum, Optimism, etc.)Proficiency with automated testing and continuous integration for smart contracts#J-18808-Ljbffr

Find contract Devsecops Engineer jobs in Savannah. Short-term and project-based opportunities with top companies.

cryptoticker is an internationally focused crypto and Web3 news platform with a strong emphasis on speed, performance, and editorial quality. We serve a global audience and operate on a modern, scalable technology stack. To further professionalize and scale our infrastructure, we are looking for a Web Administrator / Platform Engineer who will take ownership of platform operations, performance, and technical evolution while working closely with editorial and product teams.

Tasks
Operate, maintain, and continuously optimize the cryptoticker platform Own deployments, environments, and release processes on Vercel Administer and extend our CMS based on Strapi Maintain, monitor, and optimize databases (Supabase, Neon / PostgreSQL) Ensure performance, availability, and security across the entire stack Manage DNS, caching, security rules, and WAF via Cloudflare Diagnose and resolve production issues, including long-term fixes Improve CI/CD pipelines, monitoring, and observabilityli> Support and integrate Web3-related features, APIs, and external services Collaborate closely with editorial and product teams on new features and technical requirements Requirements Strong experience with Next.js in production environments Hands-on experience with Vercel deployments and environment management Solid knowledge of Strapi (custom content types, APIs, roles & permissions) Experience with PostgreSQL and managed services such as Supabase or Neon Good understanding of modern web performance, scalability, and security concepts Familiarity with Cloudflare (DNS, caching, security, WAF) Basic to solid understanding of Web3 and blockchain technologies Self-driven, reliable, and comfortable working in a remote-first setup Fluent in English (written and spoken) German language skills are a plus , especially for internal communication Benefits Flexible engagement model: freelance, part-time, or full-time Fully remote work High ownership and technical responsibilit

Join the PlayStation® team as a Software Quality Engineer (Contractor) and contribute to the development of high-performing PlayStation® Link™ devices. In this role, you will be responsible for hands-on testing, test case creation, and collaboration with other quality engineers, developers, and product teams. You will perform functional, regression, exploratory, and ad hoc testing, log and triage defects, and participate in feature reviews. This position offers a range of benefits, including private medical and dental insurance, flexible working policy, and discounts on PlayStation and Sony products.

Join Sony Interactive Entertainment as a Software Development Engineer in Test (Contractor) and contribute to the quality and performance of PlayStation® Link™ devices. In this role, you will develop and maintain automated tests, perform firmware integration testing, and collaborate with various teams to ensure system quality across multiple platforms. Enjoy a range of benefits including private medical and dental insurance, flexible working policy, and discounts on PlayStation and Sony products.

Hiring a web3 developer who is experienced with writing smart contracts in solidity for Ethereum. Must also have familiarity with NFTs and current NFT trends.

Responsibilities

Handling the entire web3 portion of our site.
- smart-contract creation
- minting functionality with specifications
- wallet connect
- SVG image generation

2+ years professional experience with Solidity and smart contract development, or a notable project that you've built yourself
Interest and passion for contributing to the crypto ecosystem
Interest and passion for building secure, robust, scalable infrastructure

Requirements

experience with solidity
experience with NFTs
excellent verbal & written communication skills

Nice to haves:

A love for music, consumer tech and web3
A builder's mentality, excited to push the boundaries of imagination

What you’ll be doing:

Build secure smart contract protocols on Ethereum that will be used by hundreds of thousands of NFT collectors
Implement 0-to-1 innovations in NFT collecting protocols
Help ideate around new ways that NFTs enable unique on-chain identity and socialization

Onsite role in Albany, NY – two days per week Wednesday/Thursday + every other Friday

Overview:

A Penetration Tester with a focus on Java application security is sought to identify, exploit, and fix vulnerabilities in Java applications to guard against cyber threats.

Key Responsibilities:

Conduct penetration tests and vulnerability assessments for Java applications and infrastructure.Identify security flaws in Java code using automated and manual methods.Create and use custom exploits to test application security, simulating attacker tactics.Collaborate with Development teams to understand application architecture and find security weaknesses early.Collaborate with Testing teams to integrate with manual and automation testing.Provide guidance on secure coding and how to fix vulnerabilities.Stay updated on Java security threats and best practices.Help improve secure development processes (SDLC).Assist in responding to security incidents related to Java vulnerabilities, current published NIST CVE.Clearly document and report findings, including technical details, risk assessment, and recommended solutions.Communicate findings and recommendations to both technical and non-technical staff.Contribute to security policies for Java development and deployment.Manipulate URLs, query parameters and Application browser data to look for penetration avenues. Validate and asses' browser tokens and cache manipulation and Production vs. none prod architecture.Familiar with MITRE ATT&CK Framework.REQUIREMENTS:

Bachelor's degree in Computer Science, Information Security, or a related field.Minimum of 6 years of Development/Security experienceExperience in Penetration Testing/Ethical Hacking with a focus on Java application security.Strong knowledge of Java programming and its security practices as well as scripting experience.Core Java coding experience.Previous job background as an engineer and Dev Sec position on a large scale public enterprise scale application.Proficiency i

Overview Summary: We are seeking a mid-level QA Engineer to join a cross-functional team developing next-generation camera technology. The engineer will focus on ensuring software stability and reliability across both embedded systems and mobile applications (iOS and Android). This role emphasizes regression testing—both manual and automated—to validate new features and maintain consistent performance across camera devices. General Information Position: QA Engineer Commitment: 40 hrs/week, 1099 Contractor Work Type: Hybrid 2-3 days/week in Lincoln, Nebraska Responsibilities and Deliverables Execute regression testing for embedded camera systems and mobile applications (iOS/Android). Maintain and extend existing test packs, ensuring coverage for all supported hardware and software configurations. Perform manual and automated test cycles to validate new releases and features. Work closely with software and hardware QA teams to identify, reproduce, and track issues. Run and monitor automated tests within existing CI/CD pipelines (TeamCity). Collaborate with device lab engineers for hardware-based validation and troubleshooting. Document test results and contribute to continuous improvement of QA processes and tools. Qualifications 3–7 years of QA experience in software testing for mobile and/or embedded systems. Proven track record with regression testing and test case design. Experience with automation frameworks Familiarity with Python and/or Rust for embedded system validation. Experience in CI/CD environments and automated nightly test runs. Strong analytical skills and attention to detail, with a knack for uncovering subtle issues. Excellent communication and collaboration skills for working across distributed teams. Engagement Highlights Work on cutting-edge camera technology with both mobile and embedded software components. Collaborate with QA experts and device lab engineers Be part of an agile, fast-moving environment where quality directly impacts n

Our client, a rapidly growing innovator in the decentralized finance (DeFi) sector, is seeking a highly skilled Senior Smart Contract Developer to join their dynamic team in Jacksonville, Florida, US . This role is crucial for building secure, efficient, and scalable smart contracts that power cutting-edge blockchain applications. The ideal candidate will possess deep expertise in Solidity and a strong understanding of blockchain architecture, security best practices, and decentralized application development. You will be responsible for designing, developing, testing, and deploying smart contracts on various blockchain platforms, primarily focusing on Ethereum and related EVM-compatible chains. Your work will involve collaborating closely with product managers, frontend developers, and security auditors to ensure the integrity and functionality of our decentralized products. This position requires a meticulous approach to coding, a passion for security, and the ability to solve complex technical challenges. You will play a key role in architecting the logic for decentralized protocols, ensuring gas efficiency, and mitigating potential vulnerabilities. Responsibilities include:
Designing, developing, and deploying secure and efficient smart contracts using Solidity. Writing comprehensive unit and integration tests for smart contracts. Collaborating with security auditors to identify and remediate smart contract vulnerabilities. Participating in the architectural design of new decentralized applications and protocols. Optimizing smart contracts for gas efficiency and performance. Working closely with frontend developers to integrate smart contracts with user interfaces. Staying up-to-date with the latest developments in blockchain technology and smart contract security. Contributing to code reviews and mentoring junior developers. Researching and implementing new blockchain technologies and protocols. Ensuring compliance with industry standards and best pra