• Architect and design microservices-based payment solutions using Spring Boot • Design and implement secure RESTful APIs and asynchronous communication patterns • Apply domain-driven design (DDD) across payment bounded contexts • Own architecture for core payment flows: authorization, capture, refund, chargeback, and settlement • Design integrations with payment networks (Visa, Mastercard, ACH, SWIFT) and payment gateways • Architect for PCI-DSS compliance, tokenization, and encryption • Define idempotency and exactly-once processing patterns for payment accuracy • Design reconciliation frameworks across internal ledgers and external processors • Conduct threat modeling and security reviews • Mentor development teams and conduct architecture reviews • Define CI/CD standards in Azure DevOps with zero-downtime deployment strategies • Collaborate with Product and Business stakeholders to align technical solutions with business goals

• Own and evolve complex backend systems that power core product flows, from architecture and data modelling to reliability and long-term scalability • Partner closely with engineering leadership, product, and design to shape technical direction and translate ambiguous problems into durable solutions • Lead high-impact initiatives that span multiple services or teams, setting clear technical direction and unblocking others • Raise the bar on system design, correctness, and operational excellence across the backend codebase • Act as a force multiplier for the team: reviewing designs, mentoring engineers, and helping others make strong technical decisions • Contribute to our engineering culture by modelling thoughtful tradeoffs, clear communication, and ownership at scale

• Lead the architectural design and development of scalable Ruby on Rails applications • Optimize database performance (primarily PostgreSQL) • Ensure code quality and reliability through automated testing (RSpec, Minitest) • Mentor team members and foster knowledge sharing • Collaborate with product managers and designers to deliver solutions • Maintain comprehensive technical documentation

Role Description We are looking for AI savvy Junior Python Developers to join our Client's project. - Freelance assignment - Full-time (or part-time if you're in your final year of studies) - B2B contract - Start date: asap - Duration: 8-12 months (with possibility of extension) - Working hours: 9-17 CET - Salary brackets: up to 24 EUR/h You would join one of three projects that our Client currently has: - Project #1: One universal health profile for users and their family — structured data, AI summaries, visit context and proactive guidance — moving from fragmented records to an insights product that helps people live longer, healthier lives. - Project #2: Solving the doctor capacity crisis. The mission: help doctors handle 30% more patients with higher quality, not burnout. - Project #3: The marketplace where patients start healthcare: the default entry point for any service (doctor, clinic, procedure, lab) across channels — including agentic search platforms. Qualifications - English fluency (at least B2) - Python + Javascript/Typescript - AI Tooling like Cursor, Claude code, Copilot, ChatGPT / Gemini for day to day work - Technical education and/or exposure to demanding programming contests (e.g. ICPC, Google Code Jam–style competitions, national or university-level programming Olympiads) - Ideal Candidate: AI-Savvy: Not necessarily AI researcher, but a developer who actively uses AI tools to code faster and better - Solid foundations in software engineering principles - Language-agnostic mindset - Familiarity with modern frontend or backend development - High learning speed and coachability - Interest in AI-assisted coding as a learning and productivity tool - AI fluency is not required at this level — curiosity and responsible use are Requirements - Ability to work remotely - Willingness to collaborate with an experienced team of developers - Commitment to continuous development of hard and soft skills - Familiarity with dev-friendly processes such as Continuous Integration, Continuous Delivery, Code Review and bug bashes - Interest in long-term collaboration on challenging products (FinTech, B2B software, E-commerce and more) Benefits - 100% remote work - Work with an experienced team of developers - Continuous development of your hard and soft skills - Dev-friendly processes such as Continuous Integration, Continuous Delivery, Code Review and bug bashes - Long-term collaboration on challenging products (FinTech, B2B software, E-commerce and more) Company Description Netguru is a trusted partner in digital commerce. The company helps leading brands modernize B2B solutions, marketplaces, and retail ecosystems. Since 2008, it has empowered businesses with cutting-edge technology, AI-powered personalization, and world-class engineering and design teams. A certified B Corporation®, Netguru is trusted by major brands including IKEA, VW, OLX, Delivery Hero, Żabka, Wolt, Careem, and Vinted.