Staff/Senior Backend Engineer (Node.js)

PassFort; España; Presencial; EUR 70.000 - 110.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Stock options

Remote setup stipend

Co-working budget

Learning budget

Descripción de la vacante

Mimica is hiring a senior backend engineer to design and scale the backend powering its platform. You will shape architecture, implement scalable services, and own operational reliability in a MERN-based stack.

As part of an early engineering team, you will influence processes, security and performance while collaborating across teams and contributing to hiring and onboarding as we grow.

Formación

• 8+ years of experience as a Software Engineer.
• Proficient in JavaScript/TypeScript and modern frameworks.
• Experience with Docker and Kubernetes in production systems.
• Experience designing APIs and managing databases (PostgreSQL, MongoDB).
• Knowledge of distributed systems concepts: microservices, caching, scaling.
• Commitment to high engineering standards, code quality, reliability and security.
• Fluent in English with strong communication skills.

Responsabilidades

• Designing and implementing scalable backend architecture for the Mimica platform.
• Developing and optimizing backend services and APIs in a MERN stack environment.
• Building real-time backend services to support multi-user graph editing and AI model retraining.
• Creating libraries and APIs in Node.js to interface with ML components.
• Diagnosing fault-tolerance, availability, and performance bottlenecks and fixing them.
• Refactoring components, writing documentation, and promoting code quality.
• Participating in hiring and onboarding; driving end-to-end project management as we grow.

Conocimientos

Backend engineering

JavaScript/TypeScript

Docker

Kubernetes

Distributed systems

Performance optimization

English fluency

Herramientas

Node.js

PostgreSQL

MongoDB

Descripción del empleo

What we are building

Mimica's mission is to empower enterprises, teams, and individuals to reclaim their most precious resource — time and work more efficiently, with greater purpose and impact.

Our AI-powered task mining observes employee actions across the desktop and categorizes them into detailed process maps. Mimica’s process intelligence highlights inefficiencies, prioritizes improvements based on ROI, recommends the optimal technology for automation (RPA, intelligent document processing, GenAI), and provides a blueprint for building new automations and transforming work.

Visit our Career Page to learn more.

Our approach to engineering

• We prioritize customer needs first
• We work in small, project-based teams
• We have flexibility in terms of the problems we work on
• We own the full lifecycle of our projects
• We avoid silos and encourage taking up tasks in new areas
• We balance quality and velocity
• We have a shared responsibility for our production code
• We each set our own routine to maximize our productivity

Your mission

In this role, your mission will be to enhance and scale the backend systems powering the Mimica platform (MERN stack). This means designing and implementing a scalable architecture, developing and optimizing backend services and APIs, improving the performance and reliability of existing components, and taking operational responsibility for what you build. As a member of our early engineering team, you‘ll have the opportunity to shape our technical direction, processes and culture.

Part of your day-to-day

• Contributing to architectural decisions and collaborating across teams to identify and implement product improvements.
• Developing and optimizing a real-time backend service that enables multiple users to edit graph data and re-train AI models through their input.
• Creating libraries and building APIs in our Node.js backend to interact with the various ML components of the system.
• Diagnosing fault-tolerance and availability issues, as well as performance bottlenecks, and resolving them.
• Refactoring our components and services and producing documentation for your implementations.
• Providing feedback to peers through pair programming and code reviews and helping those around you to level up.
• Participating in hiring and onboarding new team members; taking on end-to-end project management responsibilities as we grow.

What you will bring

• Background in backend engineering, focusing on developing high-performance production software and scalable architectures.
• Minimum 8 years of experience as a Software Engineer.
• Proficiency in JavaScript/TypeScript, and experience using modern frameworks and technologies (e.g., Docker, K8s) to build high-throughput, low-latency systems.
• Practical experience in designing APIs and managing databases (e.g., PostgreSQL, MongoDB), with a keen eye for query optimization and efficient data storage & handling.
• Firm grasp of distributed systems concepts and techniques - microservices, load balancing, caching, horizontal/vertical scaling and stateless architectures.
• Commitment to upholding high engineering standards, prioritizing code quality, maintainability, reliability, and security.
• Strong analytical and troubleshooting skills – methodically decomposing systems to identify bottlenecks, determine root causes and implement effective solutions.
• Drive to continually develop your skills, improve team processes and reduce debt.
• Fluency in English, with effective communication skills – articulating complex ideas, concepts, and trade-offs clearly.

Bonus

• Experience owning projects from start to finish, including speccing, architecture, development, testing, deployment, release and monitoring.
• Experience working within an international high-impact Startup/Scale-up environment – delivering value quickly and iteratively.
• Active interest in AI, automation, or related fields.

We’d love to hear from you, even if you feel you don’t quite have all of the above.

Location

This is a fully remote position. You can be based anywhere in the UK, Americas, or Europe within a UTC-6 to UTC+1 timezone.

What we offer

Generous compensation + stock options - aligned with our internal framework, market data, and individual skills.

Distributed work: Work from anywhere - fully remote, in our hubs, or a mix.

Company-issued laptop, remote setup stipend, and co-working budget

Flexible schedules and location

Ample paid time off, in addition to local public holidays

Enhanced parental leave

Health & retirement benefits

Annual learning & development budget

Annual workaways and regular virtual & in-person socials

Opportunity to contribute to groundbreaking projects that shape the future of work

Note: Some benefits may vary depending on location and role

Mimica will only contact candidates from an @mimica.ai email address. We do not request banking or sensitive personal information during the recruiting process.