{"id":1968064,"url":"https://alion.io/job/openx-senior-software-engineer-iv-python","title":"Senior Software Engineer IV (Python)","company":{"id":94397,"name":"Openx","domain":"openx.com","url":"https://alion.io/company/openx","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":[],"countries":[],"hiring_countries":["PL"],"hiring_countries_total":1,"salary":{"min":22595,"max":25254,"currency":"PLN","period":"month","gross":true,"usd_annual":77448},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"BigQuery","optional":false},{"name":"CI/CD","optional":false},{"name":"Docker","optional":false},{"name":"GCP","optional":false},{"name":"Google BigQuery","optional":false},{"name":"GraphQL","optional":false},{"name":"Java","optional":false},{"name":"Kubernetes","optional":false},{"name":"MySQL","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Python","optional":false},{"name":"Rest API","optional":false},{"name":"SQL","optional":false}],"status":"live","first_seen_at":"2026-10-06T17:29:19Z","employer_posted_date":"2026-10-06","last_verified_at":"2026-10-09T22:49:23Z","board_verified":true,"closed_at":null,"days_open":3,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":3},"description":"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.\nIf you’re:\nOpen-minded - happy to give & receive feedback, not afraid to fail, and move on\nProactive - always want to find a satisfying solution\nSelf-organized and self-motivated\nWe want to talk to you.\nWe are operating at a scale:\n100% Cloud-based (GCP) platform\nOver 370 billion Ad requests every day\nOver 120 000 CPU daily\nOver 140 TB RAM daily\nOver 50 PB of data per week\nOver 1200 production deployments a month\nThe Team focused primarily on building audiences and segments capabilities for our platform. Our core work revolves around how audience segments are discovered, enriched, filtered, evaluated, and activated, so users can find and use the right audiences more effectively across different markets.\nTo support this, we work on AI-powered segment discovery, international audience targeting, contextual intelligence, and data marketplace features that help users discover, evaluate, and activate the right audiences at scale.\nOur work also includes the underlying graph and data-processing foundations from household graph research to scalable 1P segment pipelines, combining product, backend, and data engineering to build ad tech solutions for a 'cookieless' future.\nWhat we offer:\nEmployment contract (22 595 - 25 254 PLN gross/monthly) OR B2B (181 - 202 PLN net/hourly)\nWorking with the newest technologies such as Cloud Computing (GCP)\nChallenges at work that are difficult to find anywhere else!\nSolving important problems in a scale\nJoining a company that is growing and scaling\nFlexible working hours & remote work option\nKey Responsibilities:\nDesign high-performance, distributed, low-latency systems\nArchitect, create and deliver new features and functionality\nWork with Product to drive the requirements, and own the project end-to-end\nWork with Engineering and Product teams distributed across multiple locations\nAnalyze and improve efficiency, scalability, and stability of servers and processes\nThink long-term and be unsatisfied with band-aids\nIdentify unnecessary complexity and remove it, analyze existing solutions\nRequired Qualifications:\n5+ years experience with building SaaS applications using Python\nExperience with databases system design, RDBMs (MySQL, Postgres) or NoSQL\nExperience with Amazon Web Services or Google Cloud Platform\nDeep knowledge of cloud solutions, enabling the analysis of system architecture while taking potential costs into consideration (or alternatively, strong proficiency in another cloud platform).\nExperience 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