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Carbonfact

Carbonfact is developing carbon management software for the fashion industry. The company imports and processes extensive data to provide comprehensive reporting and support brands in reducing their carbon footprint. However, some data imports took over 10 hours and required more than 250 GB of disk space, significantly slowing down the process. This delay left limited time for retries and prevented timely client feedback.<h1>Process</h1><ol><li>Setup BullMQ Introduced BullMQ to run data import jobs asynchronously with retry capabilities.</li><li>Identify Slowness Conducted a comprehensive analysis to identify bottlenecks and rewrote slow parts of the data import process.</li><li>Implement Streaming Approach Redesigned the import script to utilize a streaming approach, significantly reducing disk space and memory usage.</li><li>Leverage Parallelism Rewrote the script to take advantage of parallel processing and fully utilize all available machine cores.</li></ol><h1>Impact</h1><ul><li>Job Monitoring The engineering team can now monitor their jobs through existing tools like Sentry.</li><li>Easy Job Creation Engineers can easily create new jobs using the provided documentation and SDK.</li><li>Processing Time Reduction Reduced data import time from 10 hours to just 30 minutes.</li><li>Disk Space Reduction Reduced disk space usage from 250 GB to just 1 GB.</li><li>Memory Usage Optimization Capped memory usage at 4 GB.</li></ul>By implementing these changes, Carbonfact successfully streamlined their data import process, improved efficiency, and enhanced customer satisfaction by delivering quicker and more accurate insights.

Implementing a background job platform and introducing parallelism at the application level to enhance performance and significantly reduce computing time.

Google Cloud Platform

Nest

Node

Improving Data Import Efficiency

Defer

In 2023 Defer, a Y Combinator backed company, aimed to revolutionize background jobs in the javascript serverless ecosystem. The mission involved R&amp;D on a JS bundling topic, web app features implementation, lead acquisition &amp; onboarding / time to value proposition optimization.<h1>Challenges</h1><h2>Serverless Builder R&amp;D</h2>To provide serverless background jobs for any project fo a customer, the builder had to bundle any project. It must be framework agnostic, and Defer's customers are using a lot of different frameworks: NextJS, Nest, Remix, SvelteKit, Express, etcBuilding an agnostic serverless builder requires deep understanding of node / typescript compiler mechanisms:<ul><li>npm, pnpm, yarn package managers under the hood</li><li>deep understanding of node resolving</li><li>typescript compiler options and compatibilities</li><li>javascript module systems (commonJS, Ecmascript, UMD, dynamic imports/requires etc)</li><li>node native addons with node-gyp</li></ul>It also requires quick jumping into the code of any JS library to identify the issues with bundling, that are often linked to specific patterns used by their maintainers. Emile had to build an extensive E2E base for any use case. Emile fixed a lot of npm packages that are not yet ready for serverless bundling.<h2>Console</h2>Providing a customer console for a tech tool is challenging in terms of developer experience. Emile had to be proactive on the user experience as the company did not have full-time designer. Also Emile had to become proficient in the technology in place:<ul><li>RelayJS for the graphQL API</li><li>Golang on the backend</li><li>PostgreSQL</li><li>AWS</li></ul><h1>Results</h1><ul><li>Reduced churn and lead loss by increasing the success rate of the project's first build.</li><li>Enhanced community engagement by quickly productizing feedback from early adopters into the console.</li><li>Improved lead acquisition with a new a landing website.</li><li>Emile became founding engineer after this 6 months mission.</li></ul>

Developping a serverless functions builder.
Implementing features on the customer console.
Develop a new landing website.

React

Golang

Core and web app tech tool engineering

We are two seasoned software engineers with a decade of experience each, having served as tech leads and founding members of a Y Combinator-backed company. Throughout our careers, we've supported startups from their early stages to Series X funding rounds, aiding in the growth of their tech teams. 🤓 Efficient Programming Pragmatism and problem-solving are at the core of our values. Our solutions prioritize maintainability and scalability, leveraging our deep expertise in software engineering to deliver maximum value efficiently. 🛠️ Skills Our skills cover a wide range, from infrastructure (AWS, Terraform, GCP, bare metal) and backend development (Golang, Node.js, Ruby, Elixir, Erlang, SQL, performance optimization) to frontend technologies (TypeScript, React, performance tuning, SEO). With experience in early-stage SaaS startups, we are adept at product management and offer adaptable solutions tailored to your needs. 🤝 Team Management We ensure a seamless transition at project completion, emphasizing team efficiency and continuity. Continuous communication and support enable your team to build upon our work effortlessly. Additionally, we provide insights and assistance in recruitment efforts to augment your team as necessary.

Fullstack Software Engineer

Backend & Infra Software Engineer

Transform your idea into a live web application. Get help at any stage: user stories, application development, application deployment.

MVP Launch

Identify performance issues at the root and start at the infrastructure side of the application. Fix it and advise on scalability. Include in existing monitoring and alerting system.

Application Scalability

Identify current and future needed positions. Build hiring strategy/process. Carry on interviews and assessments and advise the decision committee. 

Technical Recruitment 

Risk mitigation, Value assessment, Integration planning, Compliance (SOC 2, ISO 27001), and Strategic planning.

Technical Due Diligence

Integrate SSO (OAuth2, SAML, CAS, OpenID Connect), SCIM and LDAP into cloud (Azure, Okta, etc.) or your custom identity system.

Identity Management System 

Bespoke advice on current DX and team efficiency. CI/CD improvement. Project management tool automation, feature flags, preview env, first time local setup, QA strategy, etc.

Technical Team Efficiency 

Automate user flow or internal processes with third party integrations. ETL, user identity verification, stripe webhooks, etc.

Third Party Services Integration 

Improve customer success / sales / technical support efficiency with a custom backoffice. Benefit from observability & quick meaningful actions to improve your processes.

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