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 teams - Author Architecture Decision Records (ADRs) and RFCs for infrastructure and platform decisions, facilitating technical decision-making across teams with documented reasoning and clear trade-off analysis - Evaluate and decide on fundamental infrastructure trade-offs: cloud service selection, container orchestration, message broker topology, observability stack, and cost optimisation - Own 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 data - Drive 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 authority - Provide 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 authority - 3+ years building infrastructure for distributed payments or fintech systems - Deep 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 scale - Observability and SRE practices: monitoring, alerting, incident response, and SLO design - Security and compliance architecture: secrets management, network security, and controls relevant to PCI DSS / PSD2 - Experience designing or evolving the infrastructure layer of an agentic engineering harness — sandboxing, tool-execution environments, guardrails - Database and message-broker operational trade-off reasoning at scale - Excellent technical writing — ADRs, RFCs, and design docs for multiple audiences - English proficiency at B2 or above - University degree in Computer Science, IT, or a related field Nice to have: - 2+ years in platform or internal developer tooling engineering - 1+ years of agentic/LLM system design experience - Kafka or equivalent streaming architecture experience at scale - Service-mesh architecture experience - FinOps / cloud cost-optimisation experience - Chaos engineering or resilience-testing experience - Open-source contributions or technical publishing - Polish 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 hours - We offer B2B type of contract