Role Description At Dev.Pro, a US-based company, we're looking for contractors to work on projects that impact millions of people around the world. We’re seeking an experienced and talented Sr. QA Engineer/SDET to help build an innovative and market-leading product at a fintech from an early stage. The Senior QA Engineer / SDET will contribute to scaling our blockchain and AI testing practices focusing on: - Blockchain validation, verification, and testing processes using various non-UI and UI methods. - Blending traditional automation engineering with protocol-level validation, observability-driven testing, and infrastructure-aware debugging. - Working in partnership with senior engineers and business to ensure quality delivery of solutions and implementations. Our business operates in the growing sector of private markets and touches many of the fastest-evolving areas in the digital world today, such as blockchain and AI. Qualifications - Roughly 5+ years experience in software testing/SDET roles with an emphasis on various automated solutions where UI is not the main focus. - Experience with blockchain-based solutions in testing and validation. - Experience with Foundry/Hardhat in either testing and/or development capacity. - Experience with Smart Contract development (Solidity, Rust) challenges. - Strong problem-solving skills including: - Investigating root causes, not symptoms. - Using multiple system surfaces to validate truth. - Understanding eventual consistency. - Comfortable testing infrastructure without GUIs. - Treating observability as a testing tool. - Thriving in ambiguous, evolving environments. - Blockchain internal architecture familiarity (e.g. EVM vs IBC vs Consensus). - API/RPC/gRPC Testing experience with industry tools and/or homegrown. - Database solutions such as MongoDB, PostGres, or other NoSQL solutions. - Strong understanding of SDLC and STLC. Requirements - Ability to break down solutions conceptually into testable components and develop plans for testing, verification, and validation. - Identify solution risk areas and develop test harnesses that fit into the SDLC. - Utilize tools and test harnesses to accelerate current testing practices. - Work with the Engineering team to evolve testing practices to improve coverage, ensure compliance, and accelerate timelines. - Demonstrate test coverage with test solutions. - Integrate test practices into CI/CD solutions that generate metrics and visibility. - Perform functional, regression, integration, and performance testing. - Collaborate with developers, product managers, and other stakeholders to understand requirements and ensure comprehensive test coverage. - Foster an open-minded approach with regards to test tools and approaches. - Identify, document, and track bugs using bug-tracking tools (e.g., JIRA). - Participate in Agile ceremonies such as sprint planning, daily stand-ups, and retrospectives. - Continuously improve testing processes and strategies to enhance software quality. - Identify inconsistencies in requirements including key responsibilities, skills, or qualifications. Benefits - 30 paid days off per year — take them whenever you want for vacation, holidays, or personal time. - 5 paid sick days, up to 60 days of medical leave, and 6 paid days off per year for major family events like weddings, funerals, or the birth of a child. - Partially covered health insurance after the probation, plus a wellness bonus for gym memberships, sports nutrition, and similar needs after 6 months. - Grow your skills with English lessons, online training, conferences, and the option to explore new career paths. Company Description By submitting your application, you agree to the Dev.Pro Private Policy and Consent on Processing of Personal Data. You agree to have your Personal Data stored and processed by Dev.Pro.

Role Description We are looking for a Blockchain Architect to design, evaluate, and oversee end-to-end blockchain and distributed ledger solutions. The role involves: - Defining system architecture - Selecting appropriate protocols - Ensuring scalability and security - Guiding engineering teams through implementation Qualifications - 7+ years in software architecture or distributed systems - 3+ years in blockchain/DLT systems design - Strong understanding of cryptography and consensus mechanisms - Experience with smart contract platforms (e.g., Ethereum or similar) - Familiarity with enterprise blockchain frameworks - Strong systems thinking and security-first mindset Requirements - Strong understanding of cryptography and consensus mechanisms - Experience with smart contract platforms (e.g., Ethereum or similar) - Familiarity with enterprise blockchain frameworks - Strong systems thinking and security-first mindset

• Explore and experiment with blockchain use cases across a range of business scenarios, building prototypes and tooling to validate ideas in practice • Research on-chain ecosystems, protocols, and emerging trends to identify opportunities where BNB Chain infrastructure can better serve real business needs • Synthesize findings into clear technical reports and directional recommendations for the BNB Chain core team • Collaborate closely with protocol and product teams to ensure research insights feed into infrastructure decisions • Stay current with developments across the broader Web3 ecosystem — protocols, applications, and business models

• Develop, maintain, and optimize core blockchain client software (e.g., node implementation, P2P networking, consensus mechanism). • Design and implement new features and improvements to enhance the client's performance, stability, and security. • Conduct thorough code reviews and collaborate with other developers to maintain high code quality standards. • Troubleshoot and resolve complex issues related to network synchronization, state management, and transaction processing. • Contribute to the documentation and technical specifications of the blockchain client.