--- title: 'Senior Software Developer – First Technical Hire at vesta.eco' canonical: 'https://feeny.ai/job/senior-software-developer-first-technical-hire-vesta-eco-paris-d02pf23j57k4' type: 'job' last_seen: '2026-09-08' --- # Senior Software Developer – First Technical Hire at vesta.eco - **Company:** vesta.eco - **Location:** Paris, France - **Employment:** full-time - **Work type:** hybrid - **Posted:** 2024-09-18 - **Last confirmed live:** 2026-09-08 - **Apply:** https://jobs.gem.com/vesta-eco/am9icG9zdDq0iRzSEfk_laMNkl4iHeRl ## Job description About Vesta: Vesta is revolutionizing energy renovation to combat climate change. We automate the sales and design of energy efficiency projects, helping professionals in the industry design and sell systems more efficiently. Our platform, integrated with over 70 brands of solar panels, heat pumps, and air conditioning systems, uses 3D data and AI to design the optimal system for every home and generate personalized commercial proposals. As a bootstrapped startup launched in November 2023, we already have over 100 company clients, 350 active users, and generate over €300,000 in ARR. Our small but passionate team is committed to making a positive impact on the planet by accelerating the energy transition. Your Role: As the first software developer to join our team, you will have a direct impact on the future of Vesta. You will work closely with the founders to shape the company's technical vision and develop innovative solutions that will transform the energy renovation industry. Key Responsibilities: - Development and Deployment: Design, develop, and maintain key features of our SaaS platform. - Technical Architecture: Participate in defining system architecture to ensure scalability and performance. - Project Management: Take full ownership of projects from conception to completion with high autonomy. - Innovation: Propose and implement innovative solutions to solve complex problems related to the energy transition. - Code Quality: Ensure the quality, maintainability, and security of the codebase. - Collaboration: Work synergistically with the team to align technical objectives with our environmental mission. What We're Looking For: - Strong Technical Expertise: Minimum of 5 years in software development with proficiency in [specific languages/technologies, e.g., JavaScript, Python, React, Node.js]. - Autonomy and Initiative: Ability to work independently and take initiative. - Problem-Solving Skills: Analytical mindset with the ability to quickly learn new technologies. - Effective Communication: Excellent communication skills, ability to explain complex concepts clearly. - Leadership Potential: Desire to grow with the company and take on increased responsibilities. - Startup Mindset: Comfortable with ambiguity, adaptable, and motivated by a fast-paced environment. - Alignment with Mission: Passion for the energy transition and making a positive environmental impact. What We Offer: - Direct Impact: Opportunity to play a crucial role in a growing, mission-driven startup. - Career Growth: Potential to evolve into technical leadership roles. - Stimulating Environment: Passionate team dedicated to fighting climate change. - Attractive Compensation: Competitive salary with equity participation. - Flexibility: Option for remote work and flexible hours. If you're someone smart who gets things done, able to code and ship features at lightning speed while being a great team player, and looking to experience a pace of execution like never before, then this job is for you! Vesta is an equal opportunity employer. We encourage applications from individuals of all backgrounds. ## About vesta.eco ## Company Overview - **One-liner**: Vesta builds the operating system for upgrading buildings, enabling renewable energy installers to design, sell, and manage projects in minutes using AI, 3D modeling, and automation. - **Entity Type**: Private (Privately Held) - **Headquarters**: Paris, France (offices also in Rouen and Lyon) - **Founded**: 2023 - **Founders**: Benjamin (CEO) and Romain (CTO) ## Core Business - **Primary industry**: Software Development for Renewable Energy (solar, heat pumps, battery storage) - **Target customers**: B2B – renewable energy installers and clean-energy professionals (400+ contractors) - **Mission**: Accelerate the electrification of buildings so the world can install clean technologies 10x faster. ## Products & Services - **Vesta Platform (SaaS)**: An all-in-one platform that automates the entire project lifecycle. From a single street address, it generates a 3D model of the building, sizes the optimal system, and produces commercial and administrative documents. Key features include AI-powered 3D roof modeling, proposal builder, equipment comparison, and public API for ERP/CRM integration. ## Market Standing - **Valuation/Market Cap**: Not publicly available (early-stage startup, 5 employees) - **Key Metric**: 400+ contractors enabled; 50,000+ solar systems, heat pumps, and storage systems designed and sold; 300 MW of solar capacity installed; 3,500+ tonnes of CO₂ avoided. - **Notable Investors/Partners**: SOFAR (solar products) – partnership announced in 2026 making SOFAR products accessible through Vesta. - **Growth Signals**: Monthly website traffic up 27.3% (yearly +56.3%); LinkedIn followers 714 (+0.9% monthly); actively hiring for senior engineering roles; expanding capabilities (heat pumps, batteries, smart control). ## Competitive Advantages - **AI + 3D automation**: Generates a fully editable 3D roof from a single address, cutting design and quoting time from hours to minutes. - **Integrated workflow**: Combines design, sizing, pricing, proposal generation, and customer management in one platform – unique in the French market. - **Deep local integration**: Connects directly with Enedis (French grid operator) and partners with equipment manufacturers, reducing friction for installers. - **Transparent, verifiable proposals**: Structures all assumptions and calculations, making comparisons easy for end customers. ## Strategic Focus - Expand the platform to cover more clean technologies (solar, heat pumps, batteries, smart control) under one roof. - Continue to enhance AI models for 3D reconstruction and system sizing. - Scale the user base (target: 1 million tonnes of CO₂ avoided by 2030) and potentially enter new European markets. ## Why Work Here - **Remote-first**: Work from anywhere in Europe (within 3 hours of Paris timezone), with 2–3 days per month in the Paris office. - **Top-tier compensation**: Pay in the top 10% of the industry based on Paris rates, with equity in a fast-growing company. - **Direct impact**: Work closely with the founders and CTO, shaping engineering culture from the ground up. - **Hard problems**: AI, 3D modeling, LLMs, and high-scale cloud architecture – daily challenges that matter. - **No bureaucracy**: Small team (5 people), lean decision-making, and direct interaction with users. - **Tech stack**: JavaScript, React, Next.js, Python, WebGL, TensorFlow, LLMs, cloud-native. - **Hiring process**: Initial conversation with CEO, then CTO, followed by a paid 2–5 day work trial on a real project. ## Sources 1. [vesta.eco](https://vesta.eco) 2. [vesta.eco/careers](https://vesta.eco/careers) 3. [vesta.eco/careers/senior-software-developer](https://vesta.eco/careers/senior-software-developer) 4. [vesta.eco/impact](https://vesta.eco/impact) ## Other roles at vesta.eco - [Commercial Full-Cycle (H/F)](https://feeny.ai/job/commercial-full-cycle-h-f-vesta-eco-paris-2jk39vrbtdwy) — Paris, France - [Commercial Full-Cycle (H/F)](https://feeny.ai/job/commercial-full-cycle-h-f-vesta-eco-paris-0z4r3akb1akx) — Paris, France