Staff Backend Engineer – Payments & Fintech

Hello,
We are called People More because we treat our employees with respect, but also because the projects we work on are for people and should be easy and pleasant to use. We are technological, but we look at the bigger picture :)
The company is made up of people with a huge client base in the country and abroad, for whom we build projects from scratch (UX, UI, frontend, backend, mobile) or in part. We work directly for our clients and also support our partners in their own solutions. This ensures a wide range of projects and the ability to change! We work with clients all over the world.
For the project that we are working on with our partner, we are looking for Staff Backend Engineer – Payments & Fintech

Your duties will include:

• Designing and evolving backend architecture across multiple teams, ensuring clear domain boundaries, reliable service communication, and scalable system design.
• Establishing architectural principles for distributed systems, including event-driven communication, state management, data consistency, and API integration.
• Leading technical discussions and documenting architectural decisions through ADRs, RFCs, and technical design proposals.
• Assessing technology options and recommending appropriate solutions for databases, cloud infrastructure, messaging systems, and financial data processing.
• Developing and improving AI-powered engineering workflows, including agentic development tools, adoption monitoring, performance measurement, and continuous optimisation.
• Identifying opportunities to improve engineering practices, modernise existing solutions, and introduce common technical standards across teams.
• Collaborating with engineering leaders and product stakeholders to ensure that technical solutions align with business objectives and long-term platform strategy.
• Supporting experienced engineers through architectural reviews, technical mentoring, knowledge sharing, and design discussions.
• Driving cross-team technical initiatives and supporting the implementation of architectural improvements across the organisation.

Requirements that must be met:

• At least 8 years of professional experience in software engineering, including a minimum of 2 years in technical leadership or architecture-related responsibilities across multiple teams.
• Minimum 3 years of experience designing distributed systems in the payments or fintech sector.
• Strong backend engineering expertise and practical experience working with different technology stacks.
• In-depth understanding of distributed systems and architectural patterns such as Event Sourcing, CQRS, Domain Events, and Saga.
• Experience designing state machines and managing the lifecycle of financial entities.
• Strong knowledge of API architecture, including REST APIs, asynchronous communication, and event-driven integration contracts.
• Ability to evaluate database technologies, including relational, document, time-series, and ledger-oriented solutions.
• Experience assessing cloud architecture and services in environments such as AWS, Google Cloud, or Microsoft Azure.
• Practical experience designing or improving agentic engineering environments, including instrumentation, adoption tracking, and iterative optimisation.
• Understanding of LLM tool-use patterns, context management, and AI-assisted software development workflows.
• Experience preparing clear technical documentation, including Architecture Decision Records (ADRs), RFCs, and system design documents.
• Excellent written and verbal communication skills and ability to interface
• Demonstrated ability to excel in a global matrix organization
• Strong leadership skills
• Very good English and Polish