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Coperniq (Yc W23) - Full Stack Engineer (Node/React)

silver

Remoto Argentina
Development Frontend Backend Fullstack

Job Score

100 pts
Remote model (+90) Development (+10) Frontend (+10) Backend (+10)

Coperniq

About us

Coperniq is on a mission to revolutionize the renewable energy industry with cutting-edge software solutions. As a Y Combinator-backed startup, funded by Initialized Capital, we’re building the infrastructure for clean energy contractors to succeed. We’re looking for top-tier talent to scale with us.

Role Overview

We’re looking for a Senior Full Stack Engineer to lead the development and scaling of our platform. As a key member of our small, dynamic team, you’ll collaborate across functions to deliver a seamless and powerful experience for our users. This role requires deep expertise in both frontend and backend technologies, as well as a passion for building robust, scalable systems. If you thrive in fast-paced environments and are excited about making a significant impact in renewable energy, we want to hear from you.

What You’ll Do:

  • Design, develop, and maintain scalable and secure full-stack solutions.

  • Build and enhance web applications, ensuring a seamless user experience.

  • Collaborate closely with product, design, and QA teams to align on requirements and deliver high-quality features.

  • Define and implement best practices for software development and deployment.

  • Optimize application performance and scalability for growing user demands.

  • Mentor junior engineers and contribute to a culture of technical excellence.

  • Take ownership of technical decisions and contribute to the product roadmap.

What We’re Looking For:

  • Bachelor’s degree in Computer Science, or a related field, with a deep understanding of software engineering principles.

  • 7+ years of full-stack development experience, with a balanced skill set across frontend and backend. We are looking for profiles that are not purely frontend or backend — typically a 60/40 split in real project work in either direction.

  • Proficient in our tech stack: AWS, React, GraphQL, TypeScript, Node.js, NestJS, MikroORM, PostgreSQL; experience with GitLab for CI/CD, Docker, and Kubernetes.

  • Demonstrated experience in designing user interactions on websites, writing server-side API calls, and integrating front-end and back-end aspects of an application.

  • Strong problem-solving skills, with a track record of working effectively in a dynamic environment.

  • Excellent English skills and the ability to work as part of a team.

  • Experience in leading projects, from conception to implementation to feedback integration.

Nice to Have:

  • Experience in the renewable energy or SaaS industry.

  • Knowledge of geolocation technologies and real-time data integration.

  • Familiarity with SOC II compliance and secure development practices.

  • Implementing voice agents

  • Implementing docs/images editing/annotating with AI

What We Offer:

  • A flexible work environment with opportunities for remote work.

  • The chance to shape the future of clean energy.

  • A collaborative, high-performance team culture.

Interview Process

  • Silver Recruiter Screen

  • Silver Technical Screen (System Design Interview)

  • Client Technical Screen

  • System Design Screen

  • CEO Final Round

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About Software Development

Software Development is one of the most dynamic and constantly evolving fields in the job market. Professionals in this area are responsible for creating, maintaining, and optimizing web, mobile, and desktop applications that impact millions of users daily.

Key languages and frameworks include JavaScript (React, Node.js, Vue.js), Python (Django, Flask), Java (Spring), PHP (Laravel), and TypeScript. Demand for full-stack developers continues to grow, especially in tech companies and startups.

Salaries range from entry-level to senior positions, with growing opportunities for remote work and international freelancing.

About Frontend

The Frontend area is responsible for creating the visual interfaces that users interact with on websites and web applications. Frontend professionals combine technical skills with design to deliver intuitive, responsive, and accessible digital experiences.

Key skills include HTML, CSS, JavaScript/TypeScript, frameworks like React, Angular, and Vue, build tools (Webpack, Vite), CSS (Tailwind, Sass), testing (Jest, Cypress), and knowledge of web performance and accessibility (WCAG). Familiarity with design systems and reusable components is a differentiator.

Frontend developers in technology companies are highly valued, especially those who master React, Next.js, web performance, and accessibility. The field offers opportunities from junior developer to frontend architect, with a focus on user experience, performance, and code quality.

About Backend

The Backend area is responsible for all server logic, APIs, databases, and infrastructure that support web and mobile applications. Backend professionals ensure that systems are scalable, secure, and performant.

Key skills include languages like PHP, Java, Python, Ruby, Go, and Node.js, frameworks like Laravel, Spring Boot, Django, and Express, databases (MySQL, PostgreSQL, MongoDB, Redis), software architecture (clean architecture, DDD, microservices), and API security (OAuth, JWT).

Backend developers in technology companies are highly valued, especially those who master microservices architecture, cloud computing, and high-scale performance. The field offers opportunities from junior developer to software architect, with a focus on scalability, security, and efficiency.

About Fullstack

Fullstack developers are versatile professionals capable of working on both frontend and backend of web and mobile applications. They master multiple technologies and can build complete products end-to-end, from the user interface to server infrastructure.

Key skills include proficiency in at least one complete stack (React/Vue/Angular + Node.js/PHP/Python/Java), databases (SQL and NoSQL), REST/GraphQL APIs, Git versioning, CI/CD, and basic infrastructure knowledge (Docker, cloud). Clean architecture, DDD, and testing are important differentiators.

Fullstack developers are highly valued in startups and companies that need versatile and autonomous professionals. The field offers opportunities from junior developer to software architect, with a focus on complete delivery, holistic product vision, and ability to work across multiple application layers.

Discover Other Areas

Understand the scope of work, key skills, and tools used in different career areas.

About Ecommerce Analyst

The Ecommerce Analyst is the professional responsible for analyzing online sales data, buyer behavior, and virtual store performance to guide strategic decisions. They combine data analysis with ecommerce knowledge to optimize conversion, average order value, and return on investment.

Key skills include Google Analytics (GA4), Hotjar, conversion funnel analysis, cohort analysis, customer segmentation, pricing analysis, and ecommerce metrics (CAC, CLV, AOV, conversion rate). Knowledge of SQL, Power BI, Google Tag Manager, and platforms like Shopify and VTEX is a differentiator.

Ecommerce Analysts in technology companies are highly valued, especially those who can turn buyer behavior data into actionable insights to increase revenue and reduce cart abandonment. The field offers opportunities from junior analyst to ecommerce analytics manager.

About UX Design

The User Experience (UX) Design area focuses on optimizing the overall user experience when interacting with a product or service. UX professionals conduct user research (UX Research), map journeys, create wireframes, perform usability tests, and define navigation flows to ensure the product is intuitive, useful, and meets users' real needs.

About Content Writer

The Content Writer is the professional responsible for creating quality written content for websites, blogs, social media, and other digital platforms. They combine writing skills with content strategy and SEO to attract, engage, and convert audiences.

Key skills include blog content creation, landing pages, newsletters, social media content, keyword research, content strategy, editorial calendar, and SEO writing. Knowledge of WordPress, Surfer SEO, Ahrefs, and analytics tools is a differentiator.

Content Writers in technology companies are highly valued, especially those who can create accessible technical content, evergreen content, and content that generates organic traffic. The field offers opportunities from junior content writer to head of content, with a focus on quality, strategy, and content performance.

About Design

The Design field, especially UX/UI and Product Design, has experienced significant growth in recent years. With accelerated business digitization, the demand for professionals who can create intuitive and pleasant digital experiences has never been higher.

Key skills include Figma, Sketch, Adobe XD, user research, design thinking, prototyping, and system design. Product designers are increasingly valued for their direct impact on business results.

Remote work has opened doors for Brazilian designers to work for global companies, with competitive salaries in dollars and euros.

About Information Security

The Information Security area is one of the most strategic and in-demand fields in the technology market. With the rise of cyberattacks, data breaches, and regulations like LGPD and GDPR, companies of all sizes invest heavily in professionals who can protect their digital assets.

Key specializations include Network Security, Cloud Security (AWS, Azure, GCP), Offensive Security (Penetration Testing, Red Team), Defensive Security (SOC, Blue Team), AppSec, and Security Governance. Tools like SIEM (Splunk, QRadar), firewalls, EDR, and Vulnerability Management platforms are essential.

Certifications like CISSP, CEH, OSCP, CompTIA Security+, and AWS Security Specialty are important differentiators. Information security professionals are among the highest-paid in the sector, with growing demand especially in fintechs, healthtechs, and large enterprises.

Career Guides

Technology Career Guide

Planning, skills, interviews, and professional growth in IT, Data Science, DevOps, and Product.

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Design Career Guide

UX/UI, Graphic Design, Product Design. Portfolio, tools, interviews, and growth in the Design field.

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Marketing Career Guide

SEO, Paid Media, Growth, Content Marketing. Certifications, tools, and strategies to grow in Digital Marketing.

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Finance Career Guide

Financial market, investments, corporate finance, certifications, and strategies to grow in the financial field.

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Communication Career Guide

Journalism, PR, Corporate Communication, Content Marketing, and Multimedia Production.

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Administration Career Guide

Business Management, HR, Logistics, Consulting, Project Management, and Entrepreneurship.

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Data Career Guide

Data Science, Data Engineering, BI, Machine Learning, and AI. From training to the job market.

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Product Career Guide

Product Management, Product Ownership, Agile, Scrum, and OKRs. From strategy to execution.

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Tech & Remote Glossary

Stop getting lost in interviews and job descriptions

The job market, especially within tech and global companies, has developed its own dialect. Not understanding these acronyms can make you lose valuable opportunities or poorly negotiate your contract. To end this problem, we created the Definitive Glossary for the Remote Professional.

🏢 Work Models & Routine

Async (Asynchronous Work)
A communication model where responses don't need to be immediate. Instead of back-to-back meetings, the team relies on well-structured documents, threads, and messages. It's the gold standard for global companies spanning multiple time zones.
Sync (Synchronous Work)
The opposite of Async. It requires the team to be online and available at the same time for meetings, live chats, and real-time collaboration.
Daily / Stand-up
A quick daily meeting (usually 15 minutes) common in Agile (Scrum) methodologies. The team answers three questions: What did I do yesterday? What will I do today? Are there any blockers?
All-Hands / Town Hall
A company-wide meeting involving all employees. Usually led by the founders (C-Levels) to present results, new goals, and answer team questions.
1:1 (One-on-One)
A recurring individual meeting between a professional and their direct manager. It is used for career alignment, feedback, and problem-solving, not just for project status updates.

💰 Contracts, Benefits & Compensation

PTO (Paid Time Off)
Instead of strict, categorized leave policies, modern US companies usually offer a flexible pool of days (e.g., 20 days of PTO, or even "Unlimited PTO") that you can use for vacations, sick days, or personal matters, while receiving your regular compensation.
Equity / Stock Options
Company ownership. The startup offers you the right to buy shares at a heavily discounted strike price in the future. If the company grows, goes public, or is acquired, these shares can be highly lucrative.
Vesting (Vesting Schedule)
The rule that controls your Equity. It usually lasts 4 years. You don't get all the shares on day one; you "earn" them gradually as you stay with the company. A "1-year Cliff" means you must stay for at least one year to receive your first batch of shares.
RSUs (Restricted Stock Units)
Unlike Stock Options (where you have the right to buy the stock), RSUs are actual shares the company grants you as a bonus or part of your compensation package, following a strict Vesting schedule.
Independent Contractor (1099 / B2B)
The most common international hiring model for global talent working for US companies. You act as a service provider (business-to-business), receiving the gross salary (often six-figure compensation) without standard local payroll tax deductions at the source.

🤖 Recruitment & Hiring Process

ATS (Applicant Tracking System)
The "robot" that reads your resume. Software like Greenhouse, Ashby, and Workday are used to filter candidates by keywords before a human even looks at the document. (Pro tip: this is why your resume must be clean, semantic, and have the right keywords).
JD (Job Description)
The document that lists the responsibilities, technical requirements, and benefits of the open position.
Cultural Fit
The interview stage that evaluates if your core values, communication style, and worldview align with the company's culture. This is the ultimate test of your Soft Skills.
Onboarding
The integration process. It's the period of your first few weeks at the company, where you get your access credentials, learn about the culture, study the internal documentation, and understand how the product works.

🚀 How to use this to your advantage?

The secret isn't just knowing what these acronyms mean, but using them actively. If during an interview for a premium tech role you ask, "How does your PTO policy and Vesting schedule work?", the recruiter will immediately perceive you as a high-level professional, familiar with the global market standards.

The remote job market requires preparation. And having the right vocabulary is the first big step to securing six-figure proposals and standing out among thousands of applicants.

Expert Tip

The New Account Manager Profile: How to Land the Best Remote B2B SaaS Jobs

The Evolution of Account Management: Beyond Relationship Building

If you are aiming for an Account Manager (AM), Key Account Manager (KAM), or Enterprise Account Director role in 2026, it is crucial to understand that the traditional "order-taker" profile focused solely on charisma is a thing of the past. In tech companies, especially within the B2B SaaS (Software as a Service) model, Customer Acquisition Cost (CAC) is higher than ever. Consequently, retaining and expanding the existing customer base are now the primary drivers of profitability.

Recruiters at tech giants and hyper-growth startups are looking for hybrid professionals: individuals with sharp emotional intelligence, but who also possess strong analytical skills to interpret usage data and prevent churn. If your resume does not reflect this duality, you will quickly be filtered out by modern ATS algorithms.

3 Critical Skills to Make Your Resume Stand Out

1. Mastery of Data-Driven Strategies

An elite Account Manager does not wait for the client to complain before taking action. They actively monitor account health. During interviews, you must be able to discuss how you leverage CRM tools (like Salesforce, HubSpot, or Pipedrive) and Customer Success platforms (like Gainsight or Totango) to identify Upsell and Cross-sell opportunities.

"B2B sales teams that adopt data-driven and AI-backed strategies perform substantially better in customer retention and account expansion."

Gartner Report on B2B Sales

2. Bridging the Gap Between Client and Engineering (Product Feedback Loop)

You will act as the voice of the customer within the company. The most competitive roles require the AM to translate client business pains into actionable insights for Product Managers (PMs) and Software Engineers. In your portfolio of achievements, always mention how your clients' feedback helped shape the product roadmap, resulting in new features and increased Net Promoter Scores (NPS).

3. Asynchronous Communication and Remote Strategic Consulting

With remote work firmly established globally, traditional in-person business lunches have been replaced by strategic Zoom calls and asynchronous alignments. You need to demonstrate your ability to lead a Quarterly Business Review (QBR) effectively in a remote setting, presenting ROI (Return on Investment) reports that easily justify contract renewals.

Practical Interview Tips

When you reach the interview stage with a VP of Sales or Head of Customer Success, drop the generic speech and bring concrete numbers to the table. Structure your answers using the STAR method (Situation, Task, Action, Result).

  • Focus on Net Revenue Retention (NRR): Do not just state how many accounts you managed; explain how you successfully grew the revenue of those accounts over time.
  • Conflict Resolution: Have a ready-to-tell example of an "at-risk" account that you managed to turn around and save from churning.
  • Onboarding and Adoption: Explain your methodology for ensuring that the client fully adopts and utilizes the software from day one.

The Path to Six-Figure Remote Roles

The US tech market remains highly competitive, with enterprise account roles in startups and scale-ups consistently offering six-figure base salaries plus aggressive OTE (On-Target Earnings). However, simply applying through standard job boards often leads your resume straight into a black hole. To access the "hidden job market" of premium US Remote opportunities, smart networking and utilizing curated tech platforms are absolute requirements.

"The best sales opportunities are not the ones you merely apply for; they are the ones your reputation and network qualify you for in advance."

Harvard Business Review: The Future of B2B Sales