The Senior Solana Blockchain Engineer will design and implement smart contracts, develop integrations and backend systems, and ensure security and performance for decentralized applications across multiple blockchains.
Seedify is a leading Web3 Gaming Incubator and Launchpad for Web3 projects focusing on innovative technologies such as DeFi, AI, Big Data, NFTs, and Web3 Gaming. By staking $SFUND, you gain the advantage of early access to purchase project tokens, enhancing your position within the Web3 landscape. Our industry encompasses Crypto, Gaming, IDOs, and INOs. We operate as a highly-driven and fast-paced startup, we embrace a remote work culture, allowing our team to collaborate from anywhere in the world.
We’re looking for an experienced Senior Solana Blockchain Developer who will play a key role in building next-generation decentralized applications across Solana and other leading blockchain ecosystems (Ethereum, Base, BNB Chain, Polygon, Avalanche, etc).You will lead the design, implementation, and maintenance of smart contracts and blockchain integrations that power core business logic, ensuring security, scalability, and performance across multiple networks.
Smart Contract Architecture & Development
· Design, develop, and deploy Solana smart contracts using Rust and Anchor framework.
· Write Solidity or Vyper contracts for cross-chain integrations or Ethereum-compatible deployments (ETH, Base, BNB Chain, Polygon, Avalanche).
· Develop and optimize programs for tokenomics models (staking, liquidity, farming, IDOs, etc.) with a focus on gas efficiency, security, and modularity.
· Implement and maintain token standards including:
· Solana SPL tokens
· ERC20, ERC721, ERC1155, ERC4626
Blockchain Integrations & Infrastructure
· Work with Web3 libraries such as ethers.js, web3.js, or @solana/web3.js to integrate smart contracts with backend and frontend systems.
· Build and maintain cross-chain bridges, indexing pipelines, and transaction monitoring services.
· Collaborate with DevOps to automate smart contract deployment pipelines and RPC infrastructure.
Backend & System Development
· Develop backend APIs and services using TypeScript / Node.js (Express, NestJS, or Fastify).
· Integrate blockchain logic with backend microservices, databases (PostgreSQL, MongoDB, Redis), and caching layers.
· Ensure strong observability and fault-tolerance (logs, monitoring, error recovery).
Quality, Security & Testing
· Conduct code reviews, enforce security best practices, and ensure contracts are audit-ready.
· Implement unit, integration, and fuzz tests for both on-chain and off-chain components
· Collaborate with auditors during formal security reviews and implement recommended remediations.
Tech Stack:
Languages: Rust, TypeScript, Solidity (or Vyper)
Frameworks: Anchor (Solana), Hardhat / Foundry (EVM)
Web3 Libraries: @solana/web3.js, ethers.js, web3.js
Backend: Node.js, Express / NestJS, PostgreSQL / MongoDB / Redis
Testing: Jest, Mocha, Anchor test suite, Chai
Infrastructure: Docker, GitHub Actions, Alchemy / QuickNode / RPC providers
Monitoring: NewRelic, Sentry
Requirements:
Experience: 3-5+ years of experience in Solana blockchain development and other major blockchains like ETH, Base, BNB/BSC, Polygon, Avalanche, etc.
Proven experience with at least one EVM-compatible blockchain (Ethereum, BNB Chain, Polygon, Avalanche, etc).
Strong background in backend engineering using TypeScript/Node.js.
Interest on Web3 ecosystem, wallets & transactions, IDOs & ICOs, DeFi (staking, farming, liquidity pools), omnichain.
Experience integrating smart contracts into production-grade systems.
Proven track record of mentoring engineers, conducting code reviews, and leading technical discussions.
Excellent problem-solving and communication skills in a remote, async environment.
Top Skills
@Solana/Web3.Js
Alchemy
Anchor Framework
Anchor Test Suite
Chai
Docker
Ethers.Js
Express
Foundry
Github Actions
Hardhat
Jest
Mocha
MongoDB
Nestjs
Newrelic
Node.js
Postgres
Quicknode
Redis
Rust
Sentry
Solidity
Typescript
Vyper
Web3.Js
Similar Jobs
Cloud • Security • Software • Cybersecurity • Automation
Contribute to fullstack features using JavaScript, Ruby, and Python, collaborating with teams for development, bug fixes, and performance enhancement.
Top Skills:
AWSGCPGraphQLJavaScriptPostgresPythonRestRubyRuby On RailsVue
Cloud • Security • Software • Cybersecurity • Automation
The Privacy Specialist supports the data privacy program by assisting with compliance activities, conducting assessments, and implementing policies. Works collaboratively to ensure alignment with regulations.
Top Skills:
CcpaData Privacy PrinciplesGdprGitlabPrivacy Management Tools
Artificial Intelligence • Productivity • Software • Automation
The Staff Engineer, Applied AI will build and unify AI execution platforms, focusing on LLMs and orchestration, while collaborating with product teams and mentoring engineers.
Top Skills:
Attention MechanismsEvaluation FrameworksLlmsOrchestrationRetrieval SystemsTransformer NetworksVector Databases
What you need to know about the London Tech Scene
London isn't just a hub for established businesses; it's also a nursery for innovation. Boasting one of the most recognized fintech ecosystems in Europe, attracting billions in investments each year, London's success has made it a go-to destination for startups looking to make their mark. Top U.K. companies like Hoptin, Moneybox and Marshmallow have already made the city their base — yet fintech is just the beginning. From healthtech to renewable energy to cybersecurity and beyond, the city's startups are breaking new ground across a range of industries.
