Senior Backend Engineer

Who we are

At Supermodular AI, we believe AI is revolutionizing the way people and organizations work—making teams more efficient and focused on what truly drives success. We partner with IT organizations to develop tailored AI Agents that seamlessly integrate into enterprise workflows, automate complex tasks and accelerate business outcomes.

Our approach is not about adding more tools but about embedding AI into the systems IT professionals already use, ensuring automation and intelligence align with their unique challenges. From DevOps and cloud migration to cybersecurity and business continuity, our Agents address the most critical pain points by learning from the organization and evolving with its needs.

Though we are a young company, our team has a proven track record in building high-impact AI solutions and scaling engineering teams. With our first clients already benefiting from our technology, we are on a fast-growth trajectory to redefine how IT harnesses AI.

Join us if you’re excited to work in a high-paced, impact-driven environment where AI is not just a tool but a game-changer for real companies. If you thrive on solving complex problems and want to shape the future of intelligent automation, Supermodular AI is the place for you!

Your role

As a Senior Backend Engineer at Supermodular AI, you will play a key role in shaping the foundation of our backend systems. You’ll design and implement scalable architectures, ensure high standards of reliability and performance, and make critical technical decisions that guide the growth of our platform. You’ll work closely with our engineering leads, collaborating on architectural direction and best practices, while also coordinating with junior colleagues to ensure smooth execution and delivery. Beyond coding, you will contribute to defining technical strategy, improving developer experience, and fostering a culture of high-quality engineering. This is a role for someone who thrives in a fast-moving, high-impact environment—someone who is not just an excellent builder, but also a mentor and collaborator who raises the bar for the entire team.

Desired skills and qualifications

• Strong technical foundation in backend engineering, with expertise in building and scaling distributed systems, APIs, and data pipelines.

• Proven experience independently designing system architectures, making trade-off decisions, and owning backend components from concept to production.

• Ownership of technical scope, making decisions and driving implementation proactively.

• Deep knowledge of at least one modern backend ecosystem (e.g., Python, or Node.js) and familiarity with cloud-native environments (AWS, GCP, or Azure).

  • Preference towards Python, Node.js and Azure

• Solid understanding of databases (SQL and NoSQL), caching, messaging systems, and event-driven architectures.

• Practical approach to security, performance optimization, monitoring, and reliability.

• Experience mentoring and collaborating with junior engineers, fostering a learning-oriented environment.

• Strong communication and collaboration skills , able to work cross-functionally with engineering leads, product managers, and other stakeholders.

• Founder mindset - makes informed decisions with cost/speed/value in mind and is comfortable navigating uncertainty or less-than-clear requirements.

Relevant info

• Job type: full-time

• Salary range: €70.000 - €80.000

• Location: Lisbon/Munich/remote

Selection process

1. Online application: Share your CV and any relevant resources to impress us

2. First-round interview: Let's get to know each other better with an informal chat

3. Second-round interview: Deep-dive into your technical skills with a little challenge

4. Offer: Sort out the last details and join the team!

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