• Design, develop, test, debug, and implement embedded software in C/C++, Embedded C, and related languages. • Develop, integrate, and optimize drivers and software modules for communication buses such as SPI, I²C, USB, and UART. • Implement firmware aligned with software requirements, architecture, and system-level constraints. • Perform bug/defect analysis, debugging, and root‑cause investigations using simulation, emulation, and lab tools. • Conduct unit, integration, and system testing; follow established Software Development Lifecycle (SDLC) processes. • Utilize Software Bug Tracking, static analysis, and automated testing frameworks to ensure reliability. • Work closely with hardware engineers on board bring‑up, driver validation, and system integration. • Support manufacturing, testing, deployment, and firmware update activities across the product lifecycle. • Provide technical input to requirements, design reviews, and risk assessments. • Use Integrated Development Environments (IDE), version control, simulation tools, and Application Lifecycle Management (ALM) systems. • Develop and maintain Software Requirements Specifications and Technical Specifications. • Participate in continuous improvement of development workflows and engineering standards. • May act as a team lead or technical guide for smaller project groups. • Mentor junior engineers by sharing domain knowledge, reviewing code, and promoting best practices.

• Implement high-impact experiments and increase the throughput of the experimentation program to directly drive revenue • Support Kraken’s experimentation platform by enabling reliable exposure logging, metric collection, and experiment guardrails on the frontend • Partner with Data Engineering and Analytics to ensure experimental data aligns with canonical definitions and supports statistically sound analysis • Implement validation, monitoring, and alerting to proactively detect issues in experiment and product event data • Document and evangelize best practices for experimentation and analytics implementation, creating clear guidance for product and engineering teams • Collaborate with product teams to support experiment design needs, including metric feasibility, instrumentation tradeoffs, and implementation patterns • Improve and simplify event data flows to reduce redundancy, improve transparency, and lower long‑term maintenance costs • Contribute to the evolution of Kraken’s experimentation frameworks, enabling faster iteration while preserving analytical rigor

• Serve as an expert technical resource overseeing architectural design and implementation of software and technologies • Act as a hands-on leader of a small team of engineers • Contribute to high quality, testable software solutions used across the DCI Software product line • Serve as a technology leader, and be the final escalation point for production issues • Work with software development, QA, and DevOps teams to produce high quality technology solutions • Mentor less senior engineers as needed • Build modern, architecturally sound components, tools and applications to meet mission-driven strategic business goals • Infuse quality of service characteristics, such as scalability, manageability and maintainability, into distributed frameworks • Employ industry best practices to evaluate, correct and prevent vulnerabilities during the software development process • Encourage a culture of innovation and accountability while adhering to Agile best practices • Research and prototype new or alternative software solutions to improve quality • Assist in process development and enhancement in accordance with ITIL best practices • Support the positive compliant cybersecurity company posture

• Designing, building, and evolving public APIs used by external developers and partners • Improving the security, consistency, and usability of Smile’s API surface • Building and maintaining Ruby on Rails services that power integrations and developer tooling • Developing and evolving Smile’s JavaScript SDKs and frontend libraries • Crafting thoughtful developer experiences — from API ergonomics to documentation • Iterating on existing and building new in-house integrations • Partnering with internal teams to help solve for novel merchant use cases • Championing technical discussions, decisions, and trade-offs • Identifying opportunities to raise the bar in areas like architecture, performance, and security • Sharing context, feedback, and knowledge within and across teams