Title: Senior Full-Stack Developer (TypeScript/React) Location: Remote - New York, NY Job Description: About OpenYield OpenYield is building a modern automated marketplace for fixed income trading. Our mission is to evolve the standards of fixed income trading through technology and collaboration. Founded in response to the rise of algorithmic liquidity in fixed income, OpenYield launched its marketplace in 2024 to help modernize a market long defined by manual workflows, fragmented access, and legacy infrastructure. We combine a startup mentality with a sophisticated, detail-oriented approach, and we are building technology that brings firm, executable pricing, flexible integration, and a more efficient trading experience to the bond market. We are a small, flat, tech-forward team focused on moving quickly, solving hard problems, and reshaping how bond trading works. The Role We are looking for a Senior Full-Stack Developer to help build the user-facing applications and platform workflows behind our fixed income marketplace. This role will focus on developing modern web applications in TypeScript with React and Next.js, while working closely with Rust-based backend services that power trading, market data, and platform operations. You will contribute across the stack, with strong ownership of the frontend experience, including designing and building components, pages, interaction patterns, and application workflows that make complex trading and data interactions intuitive and reliable. This is a strong fit for an engineer who can translate product requirements into thoughtful user-facing interfaces, exercise strong UI and UX judgment, and deliver robust software backed by REST APIs, WebSockets, and PostgreSQL. What You’ll Do - Design and build frontend components, pages, and user workflows in React and Next.js - Own the structure and implementation of user-facing features, from reusable components to page-level experiences - Partner with product and leadership to turn complex requirements into clear, usable interfaces - Develop responsive, performant frontend experiences for trading workflows, market data views, and internal tools - Integrate frontend applications with Rust-based backend services through REST APIs and WebSocket connections - Partner with backend engineers to define API contracts, data models, and service interactions - Work with PostgreSQL-backed application data and help design features that are reliable, scalable, and observable - Improve application performance, usability, reliability, and operational visibility across the stack - Help shape frontend patterns, component architecture, and overall application UX - Debug production issues across client, API, real-time, and data layers, and drive durable fixes What We’re Looking For - 5+ years of professional software development experience - Strong experience designing and building production frontend applications with TypeScript and React - Experience with Next.js in production environments preferred - Strong product and UI judgment, with the ability to translate requirements into clear, usable application flows - Experience designing, consuming, and integrating REST APIs in full-stack applications - Experience building or working with WebSocket-based real-time application features - Experience working with PostgreSQL or other relational databases in production systems - Strong understanding of modern frontend architecture, state management, performance, and debugging - Experience working across frontend and backend boundaries in a service-based architecture - Strong proficiency with Git and collaborative software development workflows - Strong engineering judgment and the ability to work independently in a fast-moving environment - Familiarity with observability, testing, and deployment practices for production web applications - Clear communication skills and a pragmatic approach to solving hard technical problems - Comfort operating in a startup environment with broad ownership Nice to Have - Experience with Rust, or interest in working more deeply with Rust-based backend systems - Experience building real-time, data-rich, or workflow-heavy web applications - Experience with trading, capital markets, market data, or financial infrastructure - Knowledge of fixed income markets, electronic trading, or marketplace-style systems Why OpenYield - Work on meaningful infrastructure in a large, evolving market - Join a team that is fast, open, and highly collaborative - Build with modern technology at the center of the business - Help shape a platform designed to transform fixed income trading Benefits include medical, dental, and vision insurance, 401(k), unlimited vacation, hybrid or remote work schedule, and professional development opportunities

• Assess the current architecture and build a realistic modernization roadmap, prioritizing changes that deliver value without disrupting existing clients. • Lead, mentor, and grow the engineering team. Set technical standards and build a culture where people take ownership of quality. • Bring in automated testing, CI/CD, infrastructure-as-code, and observability. Lay the groundwork for faster, more reliable releases. • Identify and lead AI initiatives across the development process and the product. This means both improving how the team works (code generation, test automation, workflow tooling) and building AI-powered features for our clients. • Design systems that separate business logic from legacy components, support multi-tenant SaaS delivery, and give our web modules more independence. • Develop strategies for gradual client migration, automated deployment, and reducing per-client maintenance overhead, all while keeping the system reliable. • Work closely with product, operations, and professional services to make sure technical decisions line up with business priorities.

Role Description The Renewable Energy Graduate will support engineering activities within the Engineering Centre of Excellence (ECoE), contributing to project development, energy yield assessments, energy modelling, and early-stage design across wind, solar and BESS projects. Working under the guidance of experienced engineers and supported by a global network of experts, this role offers hands-on exposure to large-scale renewable energy projects across Southern Africa. It is an excellent opportunity for a motivated graduate looking to build technical capability while gaining insight into the full renewable energy project lifecycle. Key Responsibilities - Project Development Support - Support development teams with environmental approvals, project appeals, site selection and project sizing. - Participate in site visits and field activities. - Consolidate GIS and project-related data. - Support transversal and cross-functional project tasks as required. - Energy Yield Assessment - Support technical assessment and interpretation of wind and solar resource data. - Assist with prospecting activities for potential renewable energy sites. - Support wind and solar data monitoring campaigns. - Design & Feasibility - Assist with preliminary layout designs of renewable energy facilities. - Contribute to feasibility assessments and technical risk analyses. - Data Analysis & Modelling - Support data management, tracking, and analysis. - Assist with BESS and energy modelling activities. - Prepare presentations and summaries of modelling outputs. - Administration & Bid Support - Provide administrative support related to bid preparation and contract documentation. - Assist with ad-hoc technical and analytical tasks as required. Qualifications - Bachelor of Science, Bachelor of Engineering, or related degree. - 0–1 year professional experience (graduates encouraged). - Valid driver’s license. - Willingness to travel as required. Requirements - Technical - Strong learning ability and interest in renewable energy engineering. - Coding, CAD design, data analysis, and advanced Excel skills are advantageous. - Proficiency in MS365 (Word, Excel, PowerPoint, Teams). - Behavioural - Strong problem-solving and critical-thinking skills. - Proactive, self-motivated and willing to take ownership of tasks. - Able to work both independently and collaboratively. - Clear written and verbal communication skills. Benefits - Join a purpose-driven organisation at the forefront of renewable energy in Southern Africa. - Gain exposure to cutting-edge wind, solar and BESS projects. - Receive mentorship from experienced engineers. - Develop practical skills within a globally connected Centre of Excellence. By submitting your profile By submitting your profile, you expressly consent to the processing of your personal information as defined in the Protection of Personal Information Act 4 of 2013 (POPIA).

• Design, implement, and maintain fullstack features for high-performance, customer-centric experiences across the Nivoda platform, ensuring scalability, reliability, and security. • Build and iterate on frontend interfaces that are fast, accessible, and delightful to use. • Ensure adherence to best practices, coding standards, and quality guidelines throughout the development lifecycle. • Collaborate with product managers, architects, and stakeholders to define technical requirements and translate business needs into technical solutions. • Debug and resolve complex technical issues, providing timely support to internal teams and external customers. • Collaborate with cross-functional teams to identify and prioritize customer requirements and feedback. • Mentor junior developers and improve the quality of engineering work in the broader team. • Actively participate in discussions to improve the overall customer experience on the Nivoda platform.