Caiz

Revolutionizing Islamic Finance with Blockchain Technology

Are you ready to be part of a groundbreaking initiative that combines Islamic finance principles with cutting-edge blockchain technology?

Look no further than Caiz – The First Islamic Ecosystem Built on Blockchain

At Caiz, our mission is clear: to create a Fiqh compliant financial ecosystem that provides our community with fair and easy access to ethical financial products and services. We believe in empowering individuals to build a strong financial future while engaging in long-term economically beneficial behavior.

Our native coin, Caizcoin, that fuels the Caizblockchain. With Caizcoin, you can make seamless payments, store value, and interact with a range of ethical financial products we are developing. The centerpiece of our ecosystem is the innovative Caizapp, giving users complete control over their digital assets.

We are a passionate team reshaping finance, and we are expanding our dynamic workforce. Join us in a collaborative work environment focused on creating a fast and compliant money transfer structure.

Why to Join Caiz?

• Innovative & Purpose-Driven: At Caiz, we combine advanced blockchain technology with the principles of Islamic finance to create an innovative and modern financial system. Join us to be part of a forward-thinking organization that is reshaping the future of finance.
• Ethical Impact: As part of Caiz, you'll be working in an Organization that prioritizes ethics and integrity in all its operations, ensuring that every solution we offer aligns with the core values of fairness, transparency, and respect.
• Growth & Learning Opportunities: At Caiz, we value personal and professional growth. You'll have the opportunity to learn, innovate, and grow within a dynamic, supportive environment, while contributing to the development of ethical financial solutions.
• Global Vision, Local Impact: Caiz is focused on creating an inclusive, sustainable financial system that empowers individuals globally. You’ll be contributing to a company that has a positive impact on local communities and the global financial landscape.
• Collaborative Culture: We believe in teamwork and collaboration. You'll work alongside passionate professionals who are committed to driving change in the crypto and blockchain space, working together to create an ethical financial future.
• Secure & Transparent Environment: We emphasize trust and security in all aspects of our operations. As part of Caiz, you’ll be part of a transparent organization that values customer trust and ensures the highest security standards in the crypto space.

Tasks

We are looking for a highly skilled Blockchain Developer with expertise in Solidity and Rust to join our growing engineering team. You will play a key role in developing and optimizing smart contracts, blockchain protocols, and DeFi components that power the Caiz ecosystem.

As part of the core blockchain development team, you’ll work on both Ethereum-compatible smart contracts and Rust-based custom chain logic, contributing to secure, scalable, and innovative blockchain infrastructure.

Responsibilities:

• Design, develop, and deploy smart contracts using Solidity on EVM-compatible blockchains.
• Build and maintain Rust-based blockchain modules, such as on Substrate or Solana-compatible platforms.
• Contribute to the design of custom blockchain protocols and token standards.
• Write secure, gas-optimized, and thoroughly tested smart contracts.
• Collaborate with frontend and backend teams to integrate blockchain components into products.
• Conduct code reviews, audits, and vulnerability assessments for blockchain code.
• Analyze and improve the performance, security, and scalability of the Caiz blockchain.
• Stay up-to-date with the latest developments in blockchain technologies, including new EIPs, cryptographic primitives, and layer-2 solutions.

Requirements

Experience:

• 3+ years of experience in blockchain development with hands-on coding in Solidity and Rust.
• Strong understanding of smart contract design, blockchain architecture, cryptography, and consensus mechanisms.
• Experience developing and deploying smart contracts on Ethereum or similar EVM chains.
• Proficiency in Rust for blockchain environments such as Substrate or Solana.
• Familiarity with Web3.js, Ethers.js, Hardhat, Truffle, and related tools.
• Understanding of DeFi protocols, token standards (ERC-20, ERC-721, etc.), and layer-1/layer-2 ecosystems.
• Experience with version control systems (Git) and CI/CD workflows.
• Strong problem-solving skills and ability to write clean, maintainable code.

Preferred Skills

• Experience in building or contributing to a Layer 1 or Layer 2 blockchain.
• Knowledge of blockchain security best practices and audit processes.
• Exposure to zero-knowledge proofs (ZK), rollups, or cross-chain bridges.
• Experience in working within agile or startup environments.
• Understanding of Islamic finance or Sharia-compliant financial principles is a plus.

Level of studies: Bachelor’s degree in Computer Science, Software Engineering, Mathematics, or a related technical field.

Language Requirements: Fluent in English

Benefits

Benefits at Caiz:

• Competitive Financial Compensation: We offer financial benefits that reflect the value of your work and dedication.
• Work Flexibility: Enjoy the flexibility to work from home, the office, or even abroad.
• Annual Holidays: Generous paid time off to help you maintain a healthy work-life balance.
• Relocation Assistance: We provide relocation support for employees moving to new locations.
• Professional Development: Opportunities for training, certifications, and career growth.
• Employee Recognition: Programs to celebrate and reward your achievements and contributions.
• Inclusive & Collaborative Culture: A supportive and diverse work environment where your voice matters.
• Diversity, Equality, and Inclusion: We are committed to fostering a workplace that values diversity and promotes equality and inclusion for all employees.

Don't miss this opportunity – apply now and be part of the Caiz revolution.

Apply Now:

As our front-end developer, you will be responsible for building the ‘client-side’ of our web applications. You should be able to translate our company and user needs into functional and appealing interactive applications that meet high development standards. In this role, you will work closely with a group of talented product managers, UX designers, and other engineers to build the next generation of staking products. Your work will help with securing a wide range of blockchain networks and contribute to the bedrock of decentralization.

What will you do?

• Implement responsive UIs and web apps that work on desktop, mobile, and other popular devices
• Translate design prototypes to working code that are performant and cross-browser compatible
• Build great products that are beautiful, simple, and delightful
• Integrate front end apps with various crypto wallets
• Continuously iterate and improve using direct user feedbacks and best industry practices
• Proactively make suggestions for improving our products and internal processes

What are the requirements?

• You are a top-notch front end developer, with a passion for blockchain
• You have extensive experience with front-end design and client-side web applications
• You possess a track record of launching great products
• You have good taste in design and UX. An obsession with quality and attention to the little things
• You have a strong understanding of JavaScript fundamentals, modern tooling, and ecosystem
• You are familiar with React

What will be great to have?

• You are familiar with common web3 libraries such as ethers.js or web3.js
• You are passionate about blockchain technology and a decentralized future
• You are contributing to the open-source community
• You feel comfortable working in a startup environment

Why are we awesome you ask?

We are truly at the forefront of the crypto ecosystem as maintainers of the infrastructure layer of blockchain networks! We practice the crypto team mentality by assembling a truly global and diverse team.

We collectively represent more than 12 different countries and are united in a single mission: building out the future of decentralization. Crypto is here to stay, having introduced novel ideas such as DeFi, NFTs and DAOs. At the core of all this are teams like us working relentlessly to build the necessary tools and applications that help run and secure blockchains.

Here are some other reasons you should join us:

• We have employees from over 10 countries across the globe, and you will be able to meet interesting people from different backgrounds and cultures. Distributed and remote work is baked into our culture.
• We are one of the top staking service providers with over $3B of assets staked across our validators. We actively explore and develop new products related to staking. You will work on high-impact engineering projects building exciting new products in a startup environment.
• We have a capable and passionate team. You will find teammates who are power DeFi users, intense NFT collectors, Bitcoin & Ethereum knowledge nerds, etc. You can learn and debate everything on crypto with our teammates.
• We are not backed by VC funding, and we are already profitable. Our financial independence means that we can make decisions independent of VCs, and we prioritize our ideals of decentralization, user sovereignty, and user privacy over simply making a profit. It also means that, unlike most other startups, stakefish can provide you with a stable low-risk employment opportunity without fundraising concerns.

Apply Now:

Location: Remote

🚀 About Technance

Technance is a crypto-native financial services company enabling secure access to digital asset infrastructure for institutions worldwide. From regulatory-grade custody to trading and compliance tools, we design and operate systems that bridge traditional finance and blockchain ecosystems.

We operate globally with a remote-first team, combining strategic expertise with technical rigor to build secure, scalable crypto infrastructure. If you’re passionate about blockchain architecture, DeFi protocols, and decentralized systems—join us to shape the core layer of institutional crypto adoption.

🔧 About the Role

We’re seeking a Senior Blockchain Developer to help design and implement smart contract systems, protocol integrations, and core blockchain infrastructure. You’ll work on a variety of systems ranging from token management frameworks and on-chain trading logic to custody and staking infrastructure.

This role is ideal for engineers who understand both the mechanics of blockchains and the requirements of secure financial systems.

✅ What You’ll Do

• Design and build smart contracts for Ethereum and EVM-compatible chains
• Integrate blockchain protocols into backend systems and trading platforms
• Contribute to the architecture and security of on-chain and off-chain interactions
• Build tooling for transaction automation, gas optimization, and risk controls
• Collaborate with backend, infrastructure, and security teams on system-wide designs
• Stay current on blockchain protocol updates, EIPs, L2s, and DeFi trends

📌 What We’re Looking For

• 4+ years of experience in software engineering, with 2+ years in blockchain development
• Strong experience in Solidity, smart contract development, and Ethereum toolchains (e.g., Hardhat, Foundry, Ethers.js)
• Deep understanding of EVM, gas efficiency, and contract security patterns
• Experience with backend systems using Go, TypeScript, or Python
• Familiarity with multisig wallets, oracles, bridges, staking mechanisms, and DeFi integrations
• Knowledge of blockchain-specific risks and ability to mitigate them through smart architecture
• Ability to thrive in a fully remote, async-first team culture

🎁 What We Offer

• 💸 Stable monthly payments in USDT
• 🌐 Fully remote role with global flexibility
• 🕒 Flexible work hours and async workflows
• 🔐 Work on high-impact, security-critical infrastructure
• 🧱 Be part of building the foundation for regulated institutional DeFi
• 🛠 Flat, engineering-led team with ownership over architecture and tooling
• 🚀 Opportunity to innovate in a fast-moving, blockchain-first environment

Apply Now:

About Symbiotic

At Symbiotic, we are building a permissionless shared security primitive that empowers network builders to shape and personalise their unique restaking implementation. Our goal is to minimise risks while maximising freedom for all you wonderful builders of crypto infrastructure networks. We have a robust developer-centric proposition and we can’t wait to share it with everyone.

You can find more information about what we’re building and how we’re doing it in our docs.

Our People

We’re a tight-knit team of experienced individuals at the forefront of crypto infrastructure. Our backgrounds range from security auditing and smart contract development to node operation, and we’re supported by Paradigm and CyberFund.

We’re on the hunt for talented professionals to join our mission and strengthen our awesome team.

The Role

We are seeking a Senior Smart Contract Engineer to work on our existing smart contract codebase, including core contracts, core extensions, and middleware SDK, as well as develop new upcoming modules.

What You’ll Do

• Work at the intersection of blockchain protocols and smart contracts, contributing to the design and development of EVM-based systems
• Write, optimize, and audit smart contracts in Solidity, with a focus on performance, clarity, and security
• Build and experiment with staking, DeFi, and other protocol-level primitives
• Leverage tools like Foundry and Hardhat for development, testing, and deployment
• Conduct and support security audits, addressing vulnerabilities and integrating best practices
• Collaborate closely with protocol engineers to support integrations across L1 and L2 chains
• Work with web3 libraries like ethers.js, viem, and web3.py for off-chain contract interactions
• Occasionally contribute to related tooling and scripting in Python and TypeScript

Who You Are

• Strong understanding of Ethereum L1/L2 architecture and PoS mechanisms
• Familiar with blockchain primitives such as consensus algorithms and cryptography
• Deep knowledge of EVM internals: execution flow, memory/storage models, gas mechanics, and precompiles
• Expert in Solidity, with exposure to Yul, Vyper, or Huff (a plus)
• Solid grasp of DeFi concepts: DEXes, lending protocols, stablecoins, and staking mechanisms
• Proficient with Foundry, Hardhat, and comfortable working with ethers.js, web3.js, viem, or web3.py
• Strong security mindset, familiar with common attack vectors and the auditing process
• Practical coding experience in Python and JavaScript/TypeScript

Nice to Have

• Experience in compilers development
• Experience in Rust, Go, C/C++
• Experience in protocol development such as L1, L2
• OP stack, Arbitrum knowledge
• Experience with ZK on EVM

About Mangrove

Mangrove is a next-generation order book DEX where liquidity providers can post programmable offers. By linking arbitrary smart contracts to liquidity, Mangrove opens up a novel design space for DeFi infrastructure and composability. We’re backed by top investors in the space and value expertise, creativity, autonomy, and deep technical curiosity.

We are looking for a Fullstack Blockchain Developer to join our core engineering team. The role is full-time, ideally based in Paris, but remote-friendly for the right candidate.

What you’ll do

As a Fullstack Developer at Mangrove, you will be responsible for building both frontend interfaces and backend services, and we mean it. This is a true fullstack role where you’ll be central to the project’s success, supporting Mangrove’s new CLOB-as-a-Service branch, already backed by several top-tier partners.

You will:

• Build modular, performant frontends (React/Next.js) and cleanly integrate with backend and smart contracts
• Design and maintain backend services (Node.js/TypeScript) supporting complex trading logic
• Collaborate with smart contract engineers to bridge protocol mechanics with user-facing tools
• Develop and implement new strategies based on research insights
• Contribute to Mangrove’s technical and product direction
• Scale, monitor, test, and optimize production systems in a fast-paced DeFi environment

Requirements

• Solid full-stack Web3 dev (frontend + backend)
• DeFi and crypto power user, eager to learn
• Expert in React, TypeScript, and modern frameworks
• Skilled with EVM contracts using ethers.js, wagmi, or viem
• Experience with Hono, Ponder, and on-chain data indexing
• Built and shipped live DeFi products with real users
• Clean, tested code; autonomous and fast-paced mindset
• Fluent in English and partially available during CET hours

Nice to have

• Experience with smart contract development (Solidity)
• Passion for DeFi, trading, or low-level protocol design

What does Mangrove offer?

• Competitive salary + equity/tokens
• High-impact, full-ownership role
• Full autonomy to build and ship
• Work with a top-tier team, including PhDs and DeFi veterans
• Team retreats and conferences
• Shape the future of on-chain trading

How to apply

We keep it simple:

1. Apply – Send us your GitHub, portfolio, CV, or any project you’re proud of
2. Intro call – 20 minutes to get to know each other
3. Technical test – Tailored to your full-stack Web3 skills
4. Final interview – Meet the team and dive deeper
5. Offer – Welcome to the team

Send your application to email.

Links

• Website
• Docs
• Twitter
• GitHub

Equal Opportunity

Mangrove is committed to fostering a diverse and inclusive work environment. We encourage all types of profiles to apply and do not discriminate on the basis of race, national origin, religion, gender, sexual orientation, marital status, disability, social origin, or age.

Today, more than 20 industries are already being positively shaped by this next generation of apps built on the peaq network. This is an opportunity to join a team of performance-driven entrepreneurs, engineers, and creatives, on a mission to unlock the Age of Abundance.

We’re looking for a skilled and detail-oriented Full Stack Developer to join our tech team and help build products that meet the highest quality standards and contribute to an exceptional user experience.

Responsibilities

• Develop and maintain Web3 applications using Next.js (frontend) and Node.js (backend).

• Build decentralized applications (dApps) that integrate with smart contracts.

• Work with Ethereum, Polygon, and other blockchain networks to interact with smart contracts using Web3.js, Ethers.js, or Viem.

• Implement and integrate ERC-20, ERC-721 (NFTs), and ERC-1155 token standards.

• Optimize frontend and backend performance for scalability, security, and usability.

• Build robust APIs and services using RESTful APIs and GraphQL.

• Collaborate with blockchain engineers, designers, and product teams to create seamless user experiences.

• Write clean, modular, and well-documented code following SOLID principles and Web3 best practices.

• Stay updated with the latest trends in Web3, blockchain development, and smart contract integration.

Basic Qualifications & Requirements

• 3+ years of experience as a Full Stack Developer.

• Proven experience working with JavaScript & TypeScript.

• Some experience working with Next.js, React.js, and Node.js for full stack development.

• Hands-on experience with blockchain and Web3 development.

• Proficiency with Web3.js, Ethers.js, or Viem to interact with smart contracts.

• Understanding of Ethereum Virtual Machine (EVM), Solidity, and smart contract development.

• Experience working with ERC-20 tokens, NFTs (ERC-721, ERC-1155), and DeFi protocols.

• Backend experience with Express.js, Nest.js, or similar frameworks.

• Familiarity with IPFS, The Graph, Moralis, or Alchemy for blockchain data access.

• Strong understanding of security best practices in Web3 applications.

• Experience with databases such as PostgreSQL, MongoDB, or Firebase.

• Version control with Git/GitHub and CI/CD pipelines.

Preferred Skills & Experience

• Experience with Solidity and smart contract development.

• Familiarity with Layer 2 solutions (Arbitrum, Optimism, zkSync, etc.).

• Knowledge of DeFi, DAOs, or NFT marketplaces.

• Understanding of decentralized storage solutions (IPFS, Arweave, Filecoin).

• Experience working with Python for blockchain data processing.

• Cloud services expertise (AWS, GCP, Azure).

Benefits

• Remote first. You’ll be joining a team working from all over the world.

• Flexible working arrangements. Create your own journey with flexible working schedules and locations.

• The opportunity to build and contribute to high-impact projects in a new industry that will positively shape the lives of hundreds of millions of people.

• High growth potential. Room to grow professionally, while learning new skills and working at the cutting edge of the decentralized Machine Economy.

• A warm and open culture at an international organization with team members from all four corners of the globe.

• An environment that values autonomy, team spirit and open communication.

We look forward to building the future with you.

Apply Now: