Senior Site Reliability Engineer

As a Senior Site Reliability Engineer, I act as a glue layer between infrastructure, observability, and product development teams — building tools, improving reliability, and quietly cleaning up everything that would otherwise be someone else’s production outage. I focus on log pipelines, event processing, and developer support; writing AWS Lambdas that wrangle incoming mail data, building data sanitization flows, and ensuring log noise doesn’t drown out real signals. On a typical day, I’m delivering small, reliable systems, supporting others in building better software, and figuring out how to make messy problems less messy. I also tend to be the one who takes on the tasks no one else wants — or knows how to start. Also known internally as the person who keeps things working when no one else is looking — and occasionally provides unofficial platform therapy to stressed developers and angry CI pipelines. Technologies used: AWS, EKS, Lambda, S3, Datadog, Vector, InfluxDB, Python, Go, CI/CD, Bash

DevOps Staff Engineer

At Xperi (TiVo / DTS), I worked as a DevOps Staff Engineer on DTS AutoStage – a global, content-first infotainment platform for automotive manufacturers. DTS AutoStage enhances the in-car media experience by enriching traditional radio and streaming audio with additional metadata such as album art, track information, related artists, upcoming content, and personalized suggestions (e.g. podcasts, stations playing similar music, and more). This platform powers infotainment systems in vehicles from major global OEMs. My role focused on building and maintaining the cloud infrastructure behind this system, hosted on Google Cloud Platform. I supported development teams working on GCP-based applications, designed internal tooling, and maintained CI/CD pipelines. I played a key role in migrating legacy services to Kubernetes, reducing operational costs and simplifying deployment workflows. I introduced GKE Autopilot clusters for selected workloads and implemented static application security testing (SAST) on commit. In addition, I developed Lua plugins for OpenResty used in the content delivery pipeline, and introduced HashiCorp Waypoint to streamline the developer experience. I also provided on-call support and implemented DLP-inspired countermeasures to prevent security issues such as hardcoded credentials. Technologies used: Terraform, Atlantis, Sentry, GCP, Helm, Go, Python, Lua, Kubernetes (and others)

Systems Engineer

At Allegro, I worked as a Systems Engineer on the Allegro One Box project – a proprietary network of smart parcel lockers developed in-house by Poland’s largest e-commerce platform. I was responsible for managing both Microsoft Azure and VMware infrastructure while contributing to the development of internal tooling and management systems used to operate the Automated Parcel Machines (APMs). One of my key achievements was deploying a distributed Ceph storage cluster to support a HashiCorp Nomad-based orchestration platform. I also deployed Nomad itself, along with a highly available Zabbix monitoring stack running on Nomad. In addition to infrastructure work, I was actively involved in integrating the physical APM units with the platform – from low-level diagnostics and telemetry collection to designing automation flows. I built an Ansible-based system that enabled real-time diagnosis and remote recovery of the APMs by aggregating data from Salt Stack, Zabbix, and Prometheus. Technologies used: ARM64, Python, Go, Zabbix, HashiCorp Nomad, HashiCorp Consul, Ceph

DevOps Engineer - Operation Services

At Polkomtel Infrastruktura (now part of CellNex / TowerLink), I worked as a DevOps Engineer supporting the internal diagnostic and observability systems behind one of Poland’s largest mobile telecommunications networks. My role focused on building tooling for telecom engineers — enabling them to monitor, analyze, and respond to potential issues within the mobile core and access networks. I developed backend systems that collected and decoded diagnostic traffic from network appliances (eNodeB/gNodeB), helping detect anomalies and performance degradations before they could escalate. One of my key contributions was the development of a high-throughput system capable of capturing, decoding, and storing proprietary debug protocols (such as Ericsson’s EBM) at ~1 Gbps in near-real-time — covering the national footprint of the network. In addition to diagnostics, I managed and integrated OSS platforms from multiple vendors, maintained metric databases for MSISDN- and call-quality-level data, and worked closely with operations teams to improve visibility and data reliability across the infrastructure. Although not visible to end users, this infrastructure observability directly empowered network engineers to maintain and optimize the performance of a nationwide mobile network — improving decision-making, service reliability, and SLA compliance, and ultimately affecting the experience of millions of customers. Tech stack: Go, Python, Linux, UNIX, Zabbix, Prometheus, Grafana, PostgreSQL, Ansible

Python Software Engineer

At PKO Bank Polski, I worked as a Python Software Engineer on projects related to PSD2 – the EU directive on payment services that introduced open banking across Europe. My work focused on the implementation of XS2A (Access to Account) functionality in the IKO Mobile App, enabling customers to connect accounts from other banks and view them in a single interface. This feature offered real multi-bank account visibility within one app, enhancing customer experience and personal finance control. Beyond convenience, this integration also served internal purposes: by allowing the bank to read and analyze external transaction data (with user consent), it could improve internal credit scoring models and inform better lending decisions. The project required cross-disciplinary work that extended far beyond application logic. I was involved in analyzing both technical and legal requirements, designing middleware components, and working closely with internal teams, external vendors, and national institutions including the Polish clearing house (KIR) and other major banks. It also involved low-level certificate handling (eIDAS/QWAC), secure interbank communication, endpoint validation, and cooperation with legal and compliance teams to ensure regulatory alignment. This was a highly collaborative effort, combining security, legal compliance, architecture, and interoperability to bring new financial possibilities to end users within a regulated ecosystem. Tech stack: Python, Enterprise Architect, eIDAS/QWAC, XS2A, PSD2, OAuth2, REST APIs

Python Software Engineer

First steps At rentier.io, I worked as a Python Software Engineer focusing on collecting and analyzing real estate market data in Poland. My responsibilities included developing web scrapers to gather economic information about properties, maintaining a clean and efficient codebase, and contributing to the backend of the rentier.io web application. I also delivered scalable data analysis algorithms, including a solution for automatically calculating prices (both for sale and rent) per square meter, and generating heatmaps of property values across Poland. Tech stack: Python, PostGIS

hodur.NET

1st job: Sole proprietor Between 2015 and 2017, I ran my own business – hodur.NET – focused on smart home automation, custom electronics, and small-scale infrastructure for private and institutional clients. My work involved designing and delivering tailored smart home and security systems, including alarm installations, access control, CCTV, and intelligent lighting. I led end-to-end projects: from technical consultations and hardware selection to onsite installations and system configuration. As part of my role, I worked with subcontractors, managed bids for public tenders (including school security projects), and provided networking solutions such as Mikrotik-based LAN/WiFi setups for small businesses and residential areas. The entire operation was highly practical and client-oriented, often requiring creative problem-solving and rapid implementation of custom hardware and software solutions. Focus areas: Smart home, CCTV, access control, alarm systems, local networking, IoT-style automation