Staff Software Engineer, Devops - Fintech Platform (m/f/n)

InPost Pay is building its own fintech platform from the ground up. It’s a large-scale, international initiative where engineers will have the opportunity to shape the architecture, build core fintech components, and create solutions designed to operate at InPost’s scale. We’re building a lean, highly effective engineering organization in Poland, with AI-native engineering at its core. We’re looking for strong engineers who are comfortable with agentic engineering, from experienced professionals building complex systems and engineering tooling to a new generation of engineers who have embraced AI-driven development from the start of their careers. Job Description InPost FinTech is looking for a Staff Engineer to define the technical direction for our infrastructure, deployment, and operational reliability - across Payments Core, Merchant, and Consumer. You'll multiply team output through infrastructure architecture clarity, engineering standards, and cross-team technical leadership, while owning the evolution of the agentic engineering harness's operational backbone. You'll own the evolution of fundamental infrastructure and platform decisions across the organisation — cloud topology, deployment pipelines, observability, and security posture — ensuring they're sound, defensible, and viable for the long term. You'll report to the Senior Engineering Manager and act as the technical throughline between engineering teams, security, and compliance. → Hybrid working model: preferably 1 day per week in the Warsaw or Cracow office. Responsibilities: Define and maintain infrastructure architecture across the area: cloud topology, networking, environment strategy, deployment pipelines, and infrastructure-as-code patterns across multiple teamsAuthor Architecture Decision Records (ADRs) and RFCs for infrastructure and platform decisions, facilitating technical decision-making across teams with documented reasoning and clear trade-off analysisEvaluate and decide on fundamental infrastructure trade-offs: cloud service selection, container orchestration, message broker topology, observability stack, and cost optimisationOwn the evolution of the agentic engineering harness's infrastructure layer — CI/CD integration, agent sandboxing, tool-execution environments, and guardrails; instrument adoption and friction, and drive improvements with dataDrive org-wide technical change: define golden paths and paved roads for deployment and operations, build the case, and see adoption through across teams without direct authorityProvide technical input into platform and product strategy; mentor engineers on reliability, security, and operational excellence through design reviews and pairing Qualifications 8+ years in software or platform engineering, including 2+ years in cross-team technical leadership or architecture authority3+ years building infrastructure for distributed payments or fintech systemsDeep expertise in container orchestration (e.g. Kubernetes), CI/CD pipeline design, and infrastructure-as-code (e.g. Terraform)Cloud architecture evaluation and operation (AWS / GCP / Azure) at organisation scaleObservability and SRE practices: monitoring, alerting, incident response, and SLO designSecurity and compliance architecture: secrets management, network security, and controls relevant to PCI DSS / PSD2Experience designing or evolving the infrastructure layer of an agentic engineering harness — sandboxing, tool-execution environments, guardrailsDatabase and message-broker operational trade-off reasoning at scaleExcellent technical writing — ADRs, RFCs, and design docs for multiple audiencesEnglish proficiency at B2 or aboveUniversity degree in Computer Science, IT, or a related fieldNice to have: 2+ years in platform or internal developer tooling engineering1+ years of agentic/LLM system design experienceKafka or equivalent streaming architecture experience at scaleService-mesh architecture experienceFinOps / cloud cost-optimisation experienceChaos engineering or resilience-testing experienceOpen-source contributions or technical publishingPolish language skills Additional Information Opportunity to work in a diverse, international, and cross-functional environment, along with leading experts. You work and learn from a senior leader and their leadership team, expanding your experience and exposure in the e-commerce and logistics industries.  InPost is a growing company that offers its people an increasing number of opportunities in several locations in Europe. Fulfilling careers with a range of benefits for people and investing in providing training opportunities for their development. You will feel a part of the InPost community that makes an impact on sustainability, convenient deliveries, and the circular economy every day. Excellent working environment and flexible hoursWe offer B2B type of contract