Senior Software Engineer
5 days ago
Required Qualifications: Ideally, 5+ years of working experience in Java Experience with database system design, RDBMS, or NoSQL Experience with Google Cloud Platform, k8s, and Docker Communicative Polish and English Ability to effectively dive into technologies other than Java (Erlang, GO) Desired Characteristics: Fluently speak algorithms and data structures and platforms (Linux) Be comfortable using the right tools and languages for the job, even brand-new ones Have the ability to develop scalable, modular applications SCRUM / Agile environment experience Experience working in digital media, marketing technology, or advertising technology is a big plus. Project: At OpenX, we have built a team that is uniquely experienced in designing and operating high-scale ad marketplaces, and we are constantly on the lookout for thoughtful, creative executors who are as fascinated as we are about finding new ways to apply a blend of market design, technical innovation, operational excellence, and empathetic partner service to the frontiers of digital advertising.We’re seeking a Senior Software Engineer with strong platform and cloud expertise to design and implement scalable integrations that enhance the performance of our platform. You’ll join a talented team to build and optimize real-time services, collaborating closely with partner engineering and product teams to deliver secure and robust solutions.Please note: all interview stages are run remotely We are operating at a scale:100% Cloud-based (GCP) platform Over 400 billion Ad requests every day Over 120 000 CPU daily Over 140 TB RAM daily Over 50 PB of data per week Over 1200 production deployments a month ,[Design high-performance, distributed, low-latency systems, Architect, create and deliver new features and functionality, Work with Product to drive the requirements, and own the project end-to-end, Analyse and improve the efficiency, scalability, and stability of servers and processes, Think long-term and be unsatisfied with band-aids, Identify unnecessary complexity and remove it, Owning and leading the technical layer of the project] Requirements: Cloud, Kubernetes, Docker, Java, AWS/GCP, RDBMS, Golang, Java, Data structures Tools: Jira, Confluence, GitHub, GIT, Cloud Build, Agile, Scrum. Additionally: Private healthcare, Flat structure, Lunch card, Life insurance, Small teams, Multikafeteria, Integration events, Linkedin Learning, Free coffee, Bike parking, Playroom, Shower, Free snacks, Free beverages, Free lunch, Free parking, No dress code, In-house trainings, Modern office.
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Senior .Net Software Engineer @ uSoftware
24 hours ago
Remote, Czech Republic uSoftware Full timeQualifications 8+ years of experience with C#, ASP.NET MVC and WebAPI Solid experience with SQL Server, including hand-written queries, relational database design Knowledge of RESTful services Experience with data pipeline engineering, database design, web platform development, API design, or distributed systems Web development using HTML5, CSS,...
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Senior Software Engineer @ OpenVPN
2 weeks ago
Remote, Czech Republic OpenVPN Full time5+ years of software engineering experience, designing and deploying distributed systems at scale. 3+ years of hands-on experience with Go (Golang), including concurrency, memory management, networking, and performance tuning. Deep understanding of network-level protocols and enforcement (TCP/IP, UDP, DNS, TLS, iptables/nftables, conntrack). Proven...
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Senior Software Engineer
24 hours ago
Remote, Czech Republic Superdevs Full timeWhat you bring Strong background as a Software Engineer with Java, Linux, Docker, GitLab, SQL Experience running Elastic Stack on AWS (5+ years in enterprise environments) 3+ years working with ML / Deep Learning / Data Science / Search or Analytics topics Hands-on experience designing or optimizing search systems at scale Experience with GitLab CI/CD for...
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Senior Software Engineer
5 days ago
Remote, Czech Republic Merit Full timeYour Profile Strong technical foundation; comfortable coding in at least two modern languages. Track record of delivering production systems independently. Experience across varied environments (consulting, freelance, agency, or startup). Curious and active in AI-assisted development (e.g., Copilot, Claude, Cursor, self-hosted LLMs). Experience building or...
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Senior Software Engineer I
24 hours ago
Remote, Kraków, Czech Republic SpotOn Full timeWhat skill are we looking for? 5+ years of professional software and data engineering experience. Proficient in Python; experience with GO and TypeScript or JavaScript is highly beneficial. For candidates located within approximately 50 km of the Kraków or Gdańsk offices, we offer hybrid model (2–3 times per week). For candidates based in other cities...
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Software Engineer III
3 days ago
Kraków, Czech Republic Software Mansion S.A. Full timeWe usually work for tech startups so we’ve had our share of ever-changing, dynamic projects. In this environment, the development stage is planned only a few weeks ahead and pivots are an integral part of the job. But we like it this way – releases are quick and clients are open to trying out new technologies. What is more, there is very little chance...
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Remote, Kraków, Wrocław, Warszawa, Katowice, Czech Republic Oversee Full time5+ years of experience in software engineering, with a track record of building production systems Strong background in designing scalable, distributed applications Hands-on experience with Python/Django and Java/Kotlin*(JVM stack) Familiarity with TypeScript/React Solid understanding of Linux runtime environments Skilled at identifying and solving...
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Backend Software Engineer @ Papaya Global
7 days ago
Remote, Kraków, Czech Republic Papaya Global Full time5+ years of experience in server-side development (we use Java 21+) Strong expertise in the field of microservices (Kubernetes) Experience with web service frameworks (Spring) Experience with cloud infrastructure (S3, SQS, SES) Previous experience with hexagonal architecture, event driven architecture, 12 factor application principles Hands-on experience...
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Senior Software Engineer
1 week ago
Remote, Warszawa, Czech Republic Dell Technologies Full timeEssential Requirements Bachelor’s degree in Computer Science or related field 5–8 years of proven experience in complicated system, e.g. critical telecom product, OS (multi-threading, locks, scheduling), storage protocols (NFS, CIFS, iSCSI), storage technologies (SAN, NAS, RAID, OSD, snapshot, replication), networking, device drivers, clustering, etc....
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Senior Software Engineer @ AVENGA
5 days ago
Remote, Czech Republic AVENGA (Agencja Pracy, nr KRAZ: 8448) Full timeThis is you Polish C1 SQL Python Kafka Spark GCP (or AWS or Azure) This is us At Avenga, we believe that human creativity empowers technology that matters. Operating globally, our 6000+ specialists provide a full spectrum of services, including business and tech advisory, enterprise solutions, CX, UX and Ul design, managed services, product development, and...