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Senior Software Engineer (React.js, Python)
OANDA Poland sp. z o.o.
Source: Headcount Labs ยท original listing โ
Job data: Headcount Labs, ODbL 1.0. Job descriptions belong to their employers.
Source date: 11/2/2026
About this role
Fancy helping to shape the future of FinTech? We have always been innovators. In 1996 we were the first company to share exchange rate information, free of charge on the internet. Today, we are a world leading online trading group. Join us to: * Help build the future of online trading * Be part of a culture driven by integrity and global impact * Become part of an award-winning company - check out our full list of awards [here](https://www.oanda.com/group/about-us/awards/) We are only as good as our people. Luckily, our people are the best. Join us! How do we work? We are an international Scrum team of Full Stack Software Engineers working with React.js, Python, and Google Cloud Platform. We build and optimize registration flows and onboarding forms used by our clients for a seamless, secure onboarding experience. We place a strong emphasis on continuous improvement, autonomy, cross-team collaboration, and clean architecture. We work in a hybrid model in Cracow, Zabลocie. As a Senior Full Stack Engineer, you will: * Drive the architecture, design, build, and maintain dynamic onboarding forms and registration workflows using React.js and Python (FastAPI). * Oversee and implement third-party vendor service integrations (APIs/SDKs), ensuring reliability, and collaborate closely with external providers and internal teams across the organization. * Independently own features and technical initiatives end-to-end โ from technical design, analysis, and problem-solving to production deployment. * Ensure clear communication in English across cross-functional teams, technical stakeholders, and business partners, driving technical alignment and pragmatic solutions. * Write clean, testable, and efficient code adhering to software engineering best practices (SOLID, Clean Code), championing code quality and conducting constructive code reviews. * Champion and integrate modern developer tooling (including Claude Code and AI assistants) to streamline development, refactoring, and process automation across the team. * Lead team technical discussions, mentor other engineers, and continuously drive improvements in our system architecture. What skillset you need to be successful in this role: * Extensive commercial experience as a Full Stack Developer working with React.js and Python (FastAPI). * Demonstrated experience with system design, clean architecture, and cloud environments (preferably Google Cloud Platform). * Proven experience with third-party vendor API integrations (e.g., identity verification, payment gateways, e-signature). * Strong command of automated testing tools (PyTest, Cypress, Playwright) and CI/CD pipelines to ensure system reliability. * Strong English communication skills (C1) for daily collaboration in a multicultural environment and cross-team alignment. * High degree of autonomy, ownership, and the ability to mentor and support peers. * Solid understanding of Domain-Driven Design (DDD) principles and Infrastructure as Code (IaC, e.g., Terraform). * Hands-on experience utilizing modern developer tooling, such as AI assistants and Claude Code, in everyday engineering workflows. Bonus points if you have experience with: * Commercial background in the FinTech industry (handling sensitive data, compliance, KYC/AML, or payment systems). * Driving or contributing to organizational/team transformations toward AI-driven development, automated testing, and developer productivity tooling. _ At OANDA, to help us efficiently process applications, we use AI-driven tools to help source and rank candidates based on professional experience and skills. While these tools provide recommendations, our recruitment process remains human-centric: all final shortlisting and hiring decisions are made by OANDA team. You have the right to request a human review of your application. OANDA Global Corporation is a diverse and global team with offices around the world. We value the unique skills and experiences each individual brings to OANDA. We are committed to creating and sustaining a collegial work environment in which all individuals are treated with dignity and respect and one which reflects the diversity of the community in which we operate. We provide an inclusive and accessible environment for everyone. Candidates selected for an interview will be contacted directly. If you require accommodation during the recruitment and selection process, please let us know. We will work with you to provide as seamless a recruitment experience as possible. Learn more about our culture [here](https://www.oanda.com/group/culture/). Review [OANDA Privacy Policy](http://drive.google.com/file/d/1dZZg1HAudQsYxvCNwiu4aKIojZyNH6L1/view) and learn more about how we treat your personal data and protect your privacy. Make your first step toward a positive change in your career with OANDA OANDA aims to transform all aspects of how the world interacts with currencies, whether that be trading or utilizing currency data and information. Weโll do this our way โ connecting and collaborating with the best and most innovative to grow quickly and globally. We strive to do more than just our jobs, focus our actions on collective goals and dare to seek out innovation and creativity. All this to continue our obsession with providing the best experience for our customers. Innovation has been at the heart of everything we do! From our roots in 1997 providing free currency exchange information over the internet to launching an award-winning global trading business. We work together to drive the future of currency data solutions and trading technology. Our customers can invest in around 200 financial instruments including currencies, shares (over 1300) and commodities leveraging intelligent support and the newest technologies. What is more, we are now offering a batch of popular cryptocurrencies in the US! - OANDA is now a major global player. We are proud to be recognized! We put our clients at the heart of our innovation and services, which has earned us some of the most recognized awards in the industry. * Most Trusted Broker, Compare Forex Brokersโ Awards, 2025 * Best in Class for Mobile Trading Apps, ForexBrokers.com Annual Awards, 2025 * Best Forex/CFD Broker in AMER, TradingView Broker Awards, 2024 * Broker of the Year 2023, TradingView Broker Awards, 2023