Staff/Senior Backend Engineer (Node.js)

Mimica; Poland; On-site; PLN 391,000 - 521,000; Full time

Benefits offered by this job

Stock options

Remote-first

Laptop & remote setup stipend

Learning & development budget

Ample paid time off

Health & retirement benefits

Job summary

Mimica, an AI-powered process intelligence platform, is seeking an experienced Backend Engineer to scale our MERN-based platform. You will design scalable architecture, build high-throughput services, and own API and data-layer reliability in service of our global customers.

Join our remote-first, globally distributed team to shape engineering practices, mentor teammates, and deliver fast, data-driven improvements.

Qualifications

• Minimum 8 years of experience as a Software Engineer.
• Proficiency in TypeScript with Docker and Kubernetes.
• Experience designing APIs and managing PostgreSQL or MongoDB databases.
• Understanding of distributed systems, microservices, scalability.
• Fluent English with strong communication skills.

Responsibilities

• Contribute to architectural decisions and product improvements.
• Develop and optimize a real-time backend service for multi-user graph editing and AI model retraining.
• Create libraries and APIs in Node.js to interface with ML components.
• Diagnose fault-tolerance, availability issues, and performance bottlenecks.
• Refactor components and write documentation for implementations.
• Provide feedback via pair programming and code reviews; mentor teammates.
• Participate in hiring and onboarding; take on end-to-end project management as we grow.

Skills

Backend engineering

System design

TypeScript

English fluency

Problem solving

Code reviews

Team collaboration

Tools

Docker

Kubernetes

PostgreSQL

MongoDB

Node.js

Job description

What we are building Mimica is an AI-powered process intelligence platform enabling enterprises and individuals to reclaim their most precious resource: time. We've all seen repetitive tasks and redundant processes quietly drain productivity and creativity. Not because companies don’t want to become more efficient, but because they don’t know where to start. At the click of a button, Mimica identifies every process improvement and agentic AI opportunity across an enterprise. Our software turns everyday work into data-backed decisions, helping companies remove process bottlenecks, automate the right tasks, and upskill teams with precision and confidence. We’ve raised $26 million in Series B financing and are scaling fast. Backed by investors including Khosla Ventures and Paladin Capital, our proprietary AI technology is trusted by Fortune 500 companies to accelerate transformation. Mimica is recognized as a Top 100 AI Start-up by Accel and an industry Leader by the Everest Group. Behind our platform is a team of exceptionally talented people, remote-first and globally distributed across 16+ countries. We're looking for curious, collaborative people excited to solve complex problems. You'll join a fast-paced environment built on high ownership, bottom-up thinking, and transparent, open communication – helping some of the world's leading organizations transform the way work gets done with AI.

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.
• Diagnozing 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 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 and fluency with Python.
• 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.