Supercharge

Critical Infrastructure Engineering Tech Lead (Java/Kotlin)

Supercharge  •  Budapest, HU (Onsite)  •  2 days ago
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Job Description

Our vision is simple yet powerful: we want to create a place where engineers thrive, taking on exciting projects and using the latest technologies, free from the shackles of legacy solutions.

Thanks to the diverse range of industries we work with, our days are never boring: from world-class apps to AR solutions or even programming robots, we’ve got it all covered. We don’t just write code for our screens; rather, we develop impactful products used by millions every day: let them be large-scale public transport applications, leading fintech platforms, or storage solutions contributing to a greener future.

We are a team of 100+ engineers (Java, JavaScript, Android, iOS, NodeJS and dotnet platforms) and QA engineers with our coding fingers at the ready working on the next big thing. We value openness, modesty, hard work, and simple yet great solutions.

We’re looking for an Engineering Tech Lead for Critical Infrastructure who leads a small group of talented backend engineers taking ownership of how systems actually run in production.

This role sits at the intersection of engineering, infrastructure, and operations - and still part of the wider engineering organization. You’ll act as a technology lead for a group of talented backend engineers and be the L3 owner of critical systems; engineer and deliver them and step in on the hardest problems, while building the foundations that make those problems disappear over time.

This is about full ownership both in development and maintenance: moving from only building systems and giving reactive support to structured, scalable operations.

Your day to day will include:

  • Guiding backend developers in designing, developing, and maintaining software applications, while setting technical direction and upholding code quality standards
  • Collaborating with the software architect to define and evolve system architecture for enhanced scalability, performance, and security
  • Actively engaging in coding, code review, and driving engineering best practices
  • Mentoring and coaching team members to promote continuous learning and growth
  • Aligning with Project Managers to ensure smooth and predictable delivery
  • Staying current with modern Java/Kotlin and backend technologies, and introducing relevant improvements where it makes sense
  • Working closely with the Lead Support Manager and act as the L3 technical owner and final escalation point from a technical aspect for complex production incidents in the Continuous Services organisation
  • Maintain L3 resourcing, on-call readiness, and technical coverage across supported services
  • Drive continuous improvement in incident management, operational practices, and response quality
  • Create and maintain operational documentation (runbooks, playbooks, troubleshooting guides, post-incident learnings)
  • Identify recurring issues and system gaps, and drive long-term reliability and automation improvements
  • Leverage AI-driven tools for monitoring, alerting, and observability to improve system reliability and reduce noise

What makes you thrive here:

  • Proficiency in the Java ecosystem (Java 17,21), experience with Kotlin is a strong plus
  • Familiarity with backend frameworks such as Spring, Micronaut, or similar technologies
  • Clean code mindset, strong OOP/SOLID principles, and pragmatic engineering thinking
  • Expertise in Containerization and Kubernetes is a big plus, along with familiarity with at least one major cloud provider (AWS, GCP, or Azure)
  • Confident working with SQL or NoSQL databases
  • Experience with AI-powered coding tools/agents and curiosity about modern backend trends
  • Strong experience with production systems, infrastructure, or platform environments
  • Hands-on ownership of reliability, incident handling, and operational excellence (L3 support, on-call, SLOs)
  • Ability to build and improve processes by documenting, standardizing, simplifying complexity, and driving long-term solutions instead of quick fixes
  • Natural ability to build bridges between operations and delivery, balancing hands-on technical involvement with long-term operational ownership
  • Having a people-focused mindset: mentoring others, giving constructive feedback, and enjoying leading and improving a dynamic L3 support organization while fostering innovation and collaboration within the team
  • At least an intermediate level of English language skills since our team operates internationally

Why join Supercharge?

  • To unleash your full potential, we’re here to help you grow every step of the way with exciting international projects, access to inspiring conferences, in-house soft skill trainings, and online courses. We’ll even support your English classes, and with our  skill matrix, you’ll always have a clear path to learn.
  • To feel your best, your wellbeing truly matters to us. That’s why we offer health coverage with Medicare, Life1 gym access to keep you moving, and extra sick days for those moments you just need a little rest. We celebrate milestones with a fully paid month off after five years, offer extra paternity leave for growing families, and provide support through our Employee Assistance Program.
  • To have a blast, you’ll join a friendly team of 200+ people, all passionate about building amazing digital products. Whether it’s our Summercharge festival, a football match, quiz night, or just grabbing a drink with teammates, there’s always something to look forward to. And with our buddy system, you’ll feel part of the team from day one.
  • To brighten your day, our dog-friendly office in the heart of Budapest is filled with good vibes, great coffee, tasty snacks (yes, including Túró Rudi!), and cozy corners to relax, connect, or have a little fun when you need a break. You’ll also have a yearly personal budget and a company library to keep your curiosity growing.
About our Budapest office

Budapest is where it all started for Supercharge - this is our headquarters and the beating heart of our company. We have local offices in several countries, but this is where the real magic happens. A buzzing, vibrant space filled with talented individuals dreaming up and delivering amazing products for our clients. This Office of the Year award-winning space is home to our legendary after-work events, and as located in the heart of the city, putting us just steps away from some of the best restaurants, cafes, and bars around.
Supercharge

About Supercharge

At Supercharge, we are your innovation partner to turn disruption into opportunity.

We are a next-generation product innovation agency driving growth, efficiency, and resiliency for our partners. We create smart product strategies, design delightful interfaces and build robust, AI-driven software to turn some of the most challenging digital initiatives of our partners into success stories. Our in-house team of over 200 digital experts across our European and North American offices are passionately united in the pursuit of discovering and building better futures.

We cut through business, tech, and regulatory complexity and fuse behavior science-based design and unique data & AI-focused technical competence to propel your business. We believe that innovation is a team effort: our strategists, designers, developers, and engineers work shoulder to shoulder to enable what yesterday was still impossible.

Supercharge has been one of the fastest-growing tech companies in Europe according to Financial Times (FT1000) and Deloitte (Fast50) for two years running. Having delivered over 250 digital products for our partners internationally, we are pioneers in redefining, diversifying, and protecting businesses to achieve long-term success.

Products delivered by our team stretch from major mobile banks to solutions powering successful startups. By working with us, you will find yourself among leading companies like Ericsson, Vodafone, Santander, Metlife, Unilever, Delivery Hero, or Pfizer.

Let’s talk about your future as a digital leader! Reach out now!

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Important Notice: Fraudulent recruitment scam

We’ve been made aware of fake landing pages and WhatsApp groups falsely claiming to recruit on behalf of Supercharge. These are not affiliated with us in any way. We never hire via unofficial channels or ask for personal data on messaging apps. Open roles are only at supercharge.io/careers. Report suspicious activity to hello@supercharge.io.

Industry
IT & Software
Company Size
201-500 employees
Headquarters
London • New York • Amsterdam • Helsinki • Budapest, HU
Year Founded
2010
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