About the Company Pack is the people development platform for companies building the next generation of talent. We help you transform performers into A-Players — not with generic training, but with precision coaching, strategic mentorship, and a system that scales.

We are a team of 30 people with an average age of 27 y.o.. We are looking for someone who wants to become an Operation Specialist in the startup world and experience a very dynamic environment.

WHY WE NEED YOUR HELP

We are looking for a mid-level Full Stack Developer to contribute to the development of scalable web applications, enhance system performance, and ensure a seamless user experience. This role bridges technical architecture, backend system performance, and user-centric feature development, making it ideal for a developer with a balanced technical and product focus.

PRIMARIES RESPONSIBILITIES

1. Technical Architecture & Development Design and implement scalable, efficient features with a focus on maintainable system architecture. Lead technical discussions and make strategic architectural decisions for new and existing features. Develop full-stack solutions using SvelteKit, TypeScript, and Node.js, ensuring clean, modular, and optimized code. Balance user experience and technical performance to deliver high-quality solutions.
2. System Maintenance & Debugging Diagnose and resolve technical issues, ensuring system stability and minimal downtime. Implement robust logging, error-handling, and monitoring solutions to proactively identify and address system issues. Regularly refactor and optimize code for performance and scalability, particularly for PostgreSQL databases and AWS infrastructure.
3. Infrastructure & Deployment Manage and optimize AWS cloud infrastructure using SST, ensuring scalability and reliability for growing user demands. Develop and maintain CI/CD pipelines for automated deployment and testing. Optimize deployment processes to ensure smooth feature rollouts with minimal disruption to users.
4. AI-Driven Solutions Design and develop AI-powered tools and features to automate workflows and improve user experience. Experiment with new technologies to integrate AI solutions that scale manual processes and enhance product capabilities.

SECONDARIES RESPONSIBILITIES

• Client-Facing Technical Support Provide detailed technical insights and answers for client queries and requirements. Collaborate with clients and stakeholders to resolve technical issues.
• Infrastructure & System Optimizations Continuously monitor system and database performance, identifying and resolving bottlenecks. Stay up-to-date with the latest tools and technologies, proposing innovations to improve the platform.
• Team Collaboration Work closely with cross-functional teams, including product managers and designers, to align development with business goals. Foster a collaborative team environment, encouraging knowledge sharing and innovation.
• Code Quality & Standards Lead code reviews with a focus on identifying edge cases, improving security, and enhancing performance. Establish and enforce coding standards, including best practices for error handling, input validation, and security. Mentor junior developers, fostering an environment of continuous learning and collaboration. Ensure high test coverage using tools like Vitest and Playwright, including testing for edge cases and exceptional scenarios.
• Security & Compliance Implement secure coding practices in line with OWASP guidelines to safeguard the platform. Regularly assess and address security vulnerabilities, ensuring the application remains resilient to threats. Respond quickly and effectively to any security incidents, minimizing potential risks.

REQUIREMENTS

Technical Skills:

• English level: B2, we are an international team and all the meeting and communication are in English
• Frontend: SvelteKit, TypeScript, JavaScript (ES6+), TailwindCSS, Component-based architecture.
• Backend: Node.js, Express.js, PostgreSQL (Kysely or similar), RESTful API development.
• Cloud & DevOps: AWS (EC2, ECS, S3), Docker, Nix, GitHub Actions.
• Testing & Security: Vitest, Playwirght, OWASP Secure Coding practices, CI/CD pipelines.
• API Development: RESTful APIs, WebSockets.
• Infrastructure & Deployment: Experience with multi-tenant architectures and AWS performance tuning.
• Performance Optimization: Expertise in database query optimization, caching strategies, and multi-tenant architectures.
• AI Integration: Experience with AI/ML tools, frameworks and familiarity with the current LLM apis is a plus.

Nice to Haves:

• You like putting yourself in the game
• You like learning by doing and making mistakes
• You like working in a dynamic and flexible environment

Soft Skills:

• Strong problem-solving and debugging skills.
• Experience working in cross-functional teams.
• Ability to mentor junior developers and improve team coding practices.
• Excellent communication and collaboration with non-technical stakeholders.

Experience Required:

• 4+ years of experience as a Full Stack Developer in a fast-paced, product-driven environment.
• Previous experience working with scalable and distributed applications.
• Hands-on experience with performance optimization and system architecture.
• Strong grasp of cloud infrastructure, deployment pipelines, and monitoring solutions.

CONTRACT

• Working hours: full time
• Contract term: fixed employment contract for 6 months, then a permanent contract.
• We have designed a flexible compensation structure for our developers, giving you the choice between two options: Option A – Performance-Based Package Base salary aligned with role and seniority. Bonus up to 50% of your salary based on Company, Team, and Individual performance. There is no cap on bonuses — exceptional performance can lead to higher earnings, linked directly to over-performance. Quarterly evaluations determine the performance multiplier (based on Deliverables, Skills, and Culture). Option B – Fixed-Only Package Base salary 15-20% higher than Option A (e.g. €57.5k-60k). No participation in the performance-based bonus system. Annual review: you can switch back to Option A during salary reviews if you wish.Note: The fixed salary in Option B is designed to offer more financial stability for those who prefer predictability, while Option A offers higher upside potential linked to performance

BENEFITSSTOCK-OPTION PLAN: we have allocated employees a specific number of shares in the company.

• UNLIMITED MENTORING, COACHING & THERAPY SESSIONS: You will have the opportunity to ****follow a mentoring or a coaching path directly on our platform. Moreover, you will also have access to therapy sessions, thanks to our partner** **Serenis.
• WELFARE PLATFORM & MEAL VOUCHERS: every month you will receive an amount on the Edenred Application and you will decide how to spend it.