• Review AI-generated Scala code, system designs, and technical explanations. • Produce high-quality reference implementations and step-by-step reasoning for complex engineering problems. • Assess solutions for correctness, clarity, safety, performance, and adherence to the prompt. • Identify errors in concurrency, distributed systems behavior, JVM performance, functional correctness, and resource handling. • Fact-check technical information. • Write high-quality explanations and model solutions that demonstrate correct methods. • Rate and compare multiple AI responses based on correctness and reasoning quality. • Develop AI Training Content: Create detailed prompts across Scala/JVM topics and write high-quality reference answers to guide AI learning. • Optimize AI Performance: Evaluate and rank AI responses to improve correctness, safety, performance, and contextual relevance. • Ensure Model Integrity: Test AI outputs for inaccuracies, unsafe patterns, and bias; validate reliability across real-world use cases.

• Architect and build HubSpot solutions for US pod clients: data migrations, CRM implementations, custom UI extensions, workflows, website development, and API/systems integrations. • Write clean, maintainable code across Huble's backend stack, and own your own bug fixes and feature builds end to end. • Review API documentation to assess feasibility before committing to a scope. • Identify technical risk in a proposed solution early and propose alternatives, rather than surfacing problems after a build has started. • Provide code review and QA on US pod work, including work handed over from or to the South Africa team. • Maintain strong working knowledge of HubSpot's platform, APIs, and native capabilities, with a focus on where custom development is genuinely needed versus where native functionality already solves the problem. • Act as the client-facing technical expert during pre-sales, discovery, and scoping calls in US business hours. • Own technical validation of scope for US pod work: translate business requirements into accurate specifications, development hours, and cost estimates. • Partner directly with Solutions Architects on scoping, joining early rather than reviewing after the fact. Recurring feedback from the US pod is that requests reaching development are often missing detail. Closing that gap before it becomes a build problem is a core part of this role. • Give Sales and Account teams a straight, credible technical read during prospecting and deal-scoping conversations, including where something isn't feasible or needs to be scoped differently. • Be Huble's live technical presence for US clients: attend client calls, escalations, and discovery sessions during US hours. • Provide timely troubleshooting and technical response on live issues without needing to wait for South Africa hours to overlap. • Build direct technical credibility and trust with US clients through consistent, visible presence, not just delivered output. • Follow Huble's Back End Development standards and deployment process in full. • Join Back End team routines (stand-ups, architecture discussions, knowledge-sharing) on a regular cadence, even where full daily overlap isn't possible, to stay current with shared standards and avoid drifting into ad hoc practices. • Document scope, decisions, and handovers clearly and consistently. • Escalate to the Head of Back End Development when something is outside your judgement call, rather than resolving it alone and reporting it after the fact. • Feed learnings from US-specific client work back into Huble's broader Back End practices.

Role Description We're looking for a Senior Backend Developer to be Huble's dedicated technical resource for the US pod, reporting to the Head of Back End Development. This is an individual contributor role, not a people-management role. There is no team to manage. What the role does need is enough architectural experience and judgement to operate without a local backend peer for most of the working day. You'll split your time between hands-on development, technical scoping, and live client-facing work in US hours. You remain part of Huble's single global Back End Development team. - Software Architecture & Technical Delivery - Architect and build HubSpot solutions for US pod clients: data migrations, CRM implementations, custom UI extensions, workflows, website development, and API/systems integrations. - Write clean, maintainable code across Huble's backend stack, and own your own bug fixes and feature builds end to end. - Review API documentation to assess feasibility before committing to a scope. - Identify technical risk in a proposed solution early and propose alternatives. - Provide code review and QA on US pod work, including work handed over from or to the South Africa team. - Maintain strong working knowledge of HubSpot's platform, APIs, and native capabilities. - Scoping & Pre-Sales Support - Act as the client-facing technical expert during pre-sales, discovery, and scoping calls in US business hours. - Own technical validation of scope for US pod work. - Partner directly with Solutions Architects on scoping. - Give Sales and Account teams a straight, credible technical read during prospecting and deal-scoping conversations. - Client-Facing Technical Delivery - Be Huble's live technical presence for US clients. - Provide timely troubleshooting and technical response on live issues. - Build direct technical credibility and trust with US clients. - Standards, Quality & Team Connection - Follow Huble's Back End Development standards and deployment process in full. - Join Back End team routines regularly. - Document scope, decisions, and handovers clearly and consistently. - Escalate to the Head of Back End Development when necessary. - Feed learnings from US-specific client work back into Huble's broader Back End practices. Qualifications - 8+ years as a Backend Developer, including demonstrable experience owning architecture decisions. - Comfortable operating with autonomy, ideally with prior experience working remotely. - Proven experience scoping and costing technical work. - Comfortable pushing back on Project Managers or other stakeholders. - Experience being client-facing as a technical expert. - Strong proficiency with RESTful APIs and GraphQL. - PHP 7 / PHP 5 (5+ years): strong understanding of PHP. - Symfony 7 / 6 / 5 or similar frameworks: solid understanding of modern PHP frameworks. - HTML5 (5+ years): strong understanding of semantic, standards-based HTML. - JavaScript (4+ years): strong working knowledge. - Node.js (2-3 years): experience building scalable backend services. - React (2+ years): advantageous for supporting front-end React features. - iPaaS (2+ years): experience designing integrations using platforms like n8n.io, Boomi, or Workato. - In-depth knowledge of HubSpot's products and APIs. - Understanding of architectural patterns. - Extensive experience with development tools, build systems, version control, and CI/CD pipelines. Benefits - Fully remote position. - Final compensation packages and benefits tailored to comply with local labor laws. Interview Process - Video Interview (15 min) - 1st Interview (30 min) - Assessment - Presentation Interview (60 min) - Final Interview (30 min)

Title: Senior Software Engineer, Merchant Platform Location: San Francisco, CA Department: Engineering Job Description: About Us: At Parafin, we’re on a mission to grow small businesses. Small businesses are the backbone of our economy, but traditional banks often don’t have their backs. We build tech that makes it simple for small businesses to access the financial tools they need through the platforms they already sell on. We partner with companies like DoorDash, Amazon, Worldpay, and Mindbody to offer fast and flexible funding, spend management, and savings tools to their small business users via a simple integration. Parafin takes on all the complexity of capital markets, underwriting, servicing, compliance, and customer service for our partners. We’re a tight-knit team of innovators hailing from Stripe, Square, Plaid, Coinbase, Robinhood, CERN, and more — all united by a passion for building tools that help small businesses succeed. Parafin is backed by prominent venture capitalists including GIC, Notable Capital, Redpoint Ventures, Ribbit Capital, and Thrive Capital. Parafin is a Series C company, and we have raised more than $194M in equity and $340M in debt facilities. Join us in creating a future where every small business has the financial tools they need. About the Position: We are looking for an experienced platform-focused software engineer to join our Merchant Platform team in San Francisco to help build a scalable platform that will help power the suite of Parafin’s financial offerings. The Merchant Platform team owns the money movement infrastructure that powers all of Parafin as well as the suite of product-agnostic tools that enable product teams to delight the customers. You will work with engineering and non-engineering stakeholders across the company to launch several new products and regularly experiment with our existing products to improve the end-user experience. You will own our core platform and help identify, prioritize, and execute on infrastructure opportunities to accelerate product development and maintain high levels of reliability. The ideal candidate will thrive in a fast-paced environment, demonstrating strong technical fundamentals, the ability to navigate ambiguity and take ownership of projects from inception to completion. What You’ll Be Doing: - Design and build scalable systems that support our merchant-facing products and services. - Develop features that enhance the merchant experience and drive engagement. - Collaborate with cross-functional teams to deliver seamless product integrations. What We’re Searching For: - 5+ years of experience building and operating production backend or platform systems. - Bachelor's Degree or higher in Computer Science (or related field) - You care deeply about building high-quality software and take immense pride in your craft. - You are comfortable owning and driving the development of both product and platform initiatives from scratch. - You take the initiative to identify commonalities between different problem statements and design appropriate abstractions accordingly. - You have a strong grasp of engineering fundamentals. - You have experience building and operating asynchronous systems or data pipelines in production environments. - You are excited about working on a small team and helping us set the foundations for the company. What We Offer: - Salary Range: $220k-$265k - Equity grant - Medical, dental & vision insurance - Work from home flexibility - Unlimited PTO - Commuter benefits - Free lunches - Paid parental leave - 401(k) - Employee assistance program If you require reasonable accommodation in completing this application, interviewing, completing any pre-employment testing, or otherwise participating in the employee selection process, please contact us.