Javascript Jobs in Web3

About Us

We’re the world’s leading provider of secure financial messaging services, headquartered in Belgium. We are the way the world moves value – across borders, through cities and overseas. No other organisation can address the scale, precision, pace and trust that this demands, and we’re proud to support the global economy.

We’re unique too. We were established to find a better way for the global financial community to move value – a reliable, safe and secure approach that the community can trust, completely. We’re always striving to be better and are constantly evolving in an ever-changing landscape, without undermining that trust. Five decades on, our vibrant community reflects the complexity and diversity of the financial ecosystem. We innovate diligently, test exhaustively, then implement fast. In a connected and exciting era, our mission has never been more relevant. Swift now has a presence in 200+ countries and legal territories to serve a community of more than 12,000 banks and financial institutions.

As a Blockchain Test Engineer at S.W.I.F.T, you will play a crucial role in ensuring the quality, reliability, and security of our blockchain-based solutions. You will be responsible for designing, developing, and executing comprehensive test strategies to validate the functionality, performance, and integrity of distributed ledger technologies integrated into our financial messaging infrastructure.

What to Expect:

In this role you will:

• Design, develop, and implement robust test plans, test cases, and test scripts for blockchain applications, smart contracts and related distributed systems
• Execute various types of testing, including functional, integration, performance, security, and regression testing, specifically tailored for blockchain environments
• Test and integrate blockchain protocols and platforms, including Ethereum-compatible networks (e.g., Hyperledger Besu), Cosmos and Canton
• Test smart contracts for correctness, security vulnerabilities, and edge cases
• Collaborate closely with development teams and blockchain architects to understand technical specifications and ensure testability of features
• Perform load, performance and stress testing to assess scalability and transaction throughput
• Validate blockchain network behavior, including consensus mechanisms, node synchronization, and fault tolerance
• Test integrations with wallets, APIs, backend services
• Identify, document, and track software defects and work with development teams to ensure timely resolution
• Develop and maintain automated test frameworks and tools to improve efficiency and coverage of blockchain testing
• Contribute to the continuous improvement of testing processes, methodologies, and best practices within a blockchain context
• Stay up-to-date with emerging blockchain technologies, testing tools, and industry trends
• Participate in code reviews and provide constructive feedback to enhance code quality and testability
• Ensure adherence to S.W.I.F.T.'s quality standards and regulatory compliance requirements in all testing activities
  
  
  

What will make you successful:

We are seeking professionals with:

• Bachelor's Degree in Computer Science, Software Engineering, or a related field
• Proven (5+ years) of experience in software quality assurance or testing, with a significant focus on blockchain or distributed ledger technologies
• Solid understanding of blockchain fundamentals, including consensus mechanisms (PoW, PoS, BFT), smart contracts, cryptography, and distributed system architectures
• Proficiency in at least one programming language commonly used in blockchain development or testing (e.g., Python, JavaScript, Go, Java, Solidity)
• Experience with test automation frameworks and tools (e.g., Selenium, Playwright, Jest, Truffle, Hardhat)
• Familiarity with CI/CD pipelines and tools (e.g., Jenkins, GitLab CI)
• Strong analytical and problem-solving skills, with meticulous attention to detail
• Excellent communication and collaboration skills, with the ability to articulate technical concepts clearly to both technical and non-technical stakeholders
  
  
  

Preferred Qualifications:

• Master’s Degree in Computer Science, Software Engineering, or a related field
• Experience with performance testing and security testing methodologies for distributed systems
• Knowledge of financial services industry standards and regulatory frameworks
  
  
  

Swift is unable to sponsor an employment authorization for this position now or in the future.

The estimated salary range for a new hire in this position in Virginia is $101,303.00 USD Annual MINIMUM to $188,135.00 USD Annual MAXIMUM. Salary may vary depending on job-related factors which may include knowledge, skills, experience, and location. Our compensation packages include a competitive base salary and bonus opportunity for all employee’s contingent on personal and company performance. Our generous benefits program includes medical, dental, vision and life insurance with no premium costs for our employees and their families, and retirement plan plus matching 401k.

What We Offer

We put you in control of career

We give you a competitive package

We help you perform at your best

We help you make a difference

We give you the freedom to be yourself

We give you the freedom to be yourself. We are creating an environment of unique individuals – like you – with different perspectives on the financial industry and the world. A diverse and inclusive environment in which everyone’s voice counts and where you can reach your full potential.

If you believe you require a reasonable accommodation to participate in the job application or interview process, please contact us to request accommodation.

Don’t meet every single requirement? At Swift, we are dedicated to building a workplace where people can bring their full selves and ideas to the team, so if you are excited about this role, we encourage you to apply even if you do not meet every single qualification.