Senior Fullstack Engineer

Paystand is the worlds leading blockchain-enabled B2B payments network transforming commercial finance into a software-driven zero-fee and open ecosystem. Recognized as a CNBC/Statista 2026 Worlds Top Fintech company Paystand delivers over a decade of on-chain payments experience to middle and large enterprises.

Paystands network services more than one million payors that have moved $20 billion in volume. With its acquisitions of Yaydoo Teampay and Bitwage Paystands full-stack platform includes agentic AI its USDb stablecoin and AR/AP solutions on one tightly integrated network. Its non-profit arm advances the mission to democratize finance through Bitcoin and blockchain technology.

What We Do

We built the financial system we always thought should exist: zero fees zero friction just your money faster. Blockchain automates receivables and payables cuts time-to-cash and turns every transaction into revenue instead of cost.

Why We Do It

The current system takes a cut from the people who build create and grow and calls it the cost of doing business. We dont buy that. Every fee we eliminate compounds into growth. Were here to decentralize finance and hand the power back to the businesses driving the real economy extended further through work to democratize finance through Bitcoin and blockchain.

How We Do It

We dont wait for permission or for the industry to catch up we build the future of finance ourselves on-chain in the open. Small moves now monumental results later.

Join Us

Were not looking for people who want a job in fintech. Were looking for people who want to build what comes after it. Paystand is where you help lead a financial revolution instead of just reading about one. We stand on change. Come stand with us.

Were seeking a talented Full-Stack Engineer to play a key role in architecting and implementing user-facing components of the Paystand open banking network. As a member of our dynamic team youll collaborate closely with product owners designers and fellow engineers to craft web applications that redefine user interactions.

Paystand is an AI-first organization. As a FullStack Engineer you are expected to:

We believe in augmenting human engineering with intelligence. As an AI-first organization our expectations for this role reflect that commitment:

• Leverage AI-powered coding assistants to accelerate development velocity and maintain high code quality.
• Architect systems with AI integration in mind ensuring our web applications can seamlessly interface with machine learning models and data pipelines.
• Proactively identify and automate manual engineering workflowssuch as testing documentation and infrastructure managementusing AI tools.
• Drive technical innovation by actively integrating the latest AI development frameworks and practices into our stack.

• Lead the architecture and implementation of user-facing parts of Paystands systems.
• Design and develop reusable libraries and frameworks that support complex web applications.
• Provide technical leadership and mentorship to other engineers.
• Collaborate with product owners designers and other engineers to build the best user experience ensuring high standards of quality and performance.
• Ensure best practices in code quality security and performance.
• Participate in and influence all phases of the development lifecycle including system analysis design coding testing debugging and documentation.
• Advocate for and implement continuous improvement in the development processes and practices.

• Builder Experience
• 7 years of professional software engineering experience with a track record of independently delivering meaningful products or major capabilities from concept through production.
• Strong full-stack capability and the judgment to work across frontend backend data infrastructure and integrations as the product requires.
• Able to move from an ambiguous business problem to a practical solution: clarify the problem evaluate tradeoffs establish an architecture build the product deploy it and improve it using production feedback.
• Comfortable making progress without a fully prescribed specification while knowing when alignment deeper analysis or broader architectural review is needed.
• AI-Native Development:
• Fluency with AI-assisted and agent-led software development using tools such as Claude Claude Code OpenAI Codex or comparable platforms.
• Experience using AI throughout the engineering lifecyclenot only for code generation but also for discovery architecture implementation planning testing debugging documentation code review and operational analysis.
• Ability to provide agents with effective context decompose work into verifiable tasks evaluate generated solutions critically and maintain responsibility for correctness security and maintainability.
• Practical understanding of building AI-enabled product capabilities using model APIs structured outputs tool calling retrieval evaluations guardrails and human-in-the-loop workflows.
• Strong engineering judgment about where AI increases leverage and where deterministic software conventional automation or direct human review is more appropriate.
• Architecture and Engineering:
• Strong understanding of modern application architecture including modular system design API design asynchronous and event-driven processing data consistency caching and integration patterns.
• Demonstrated ability to design systems that can evolve and scale without introducing unnecessary complexity.
• Experience making and documenting architectural decisions based on reliability security performance cost maintainability and speed of delivery.
• Practical experience with relational databases data modeling distributed systems observability automated testing and production troubleshooting.
• Familiarity with secure engineering practices appropriate for financial or other high-trust systems including authorization data protection auditability failure recovery and idempotent processing.
• Full-Stack Product Development:
• Strong experience with at least one modern frontend ecosystem such as React Vue or Angular including component architecture state management accessibility performance and responsive design.
• Strong experience with at least one production backend ecosystem such as Python Java Go Elixir or a comparable framework.
• Ability to design clear APIs and data contracts and integrate with internal services third-party platforms and legacy systems.
• Product-minded approach to frontend development with attention to workflows usability edge cases and the complete customer experiencenot simply implementation from a design file.
• Willingness and ability to learn unfamiliar frameworks or technologies when they are the right choice for the product.
• Cloud Scaling and Delivery:
• Hands-on experience designing deploying and operating production systems on AWS or Google Cloud.
• Working knowledge of Cloudflare capabilities such as DNS CDN edge security traffic management Workers or related edge infrastructure.
• Experience with containers infrastructure as code CI/CD environment management secrets management and automated deployment practices.
• Understanding of horizontal scaling load management queues caching database scaling fault tolerance disaster recovery and multi-region considerations.
• Ability to build useful observability into a product through logs metrics traces alerts and business-level workflow monitoring.
• Comfortable owning software after release including production health incident response root-cause analysis and continuous improvement.
• Product Ownership and Leadership:
• Product mindset with the ability to co-own a product area alongside a product manager from customer problem and business outcome through technical delivery and adoption.
• Able to challenge assumptions identify simpler solutions define incremental releases and balance immediate customer value with long-term technical health.
• Strong written and verbal communication including the ability to explain technical decisions and tradeoffs to engineering product design operations and business stakeholders.
• Demonstrated technical leadership through architecture execution code review mentorship and raising engineering standards.
• High degree of ownership curiosity pragmatism and follow-through.

• Experience building payment fintech accounting ERP banking or other transaction-intensive products.
• Experience with high-integrity workflows involving money movement reconciliation ledgers approvals or external financial integrations.
• Experience building or operating AI agents and agentic workflows in production including evaluation monitoring security and cost management.
• Familiarity with workflow orchestration event streaming or durable execution technologies.
• Experience with blockchain digital assets smart contracts or decentralized systems is valuable but not required.
• Contributions to open-source software technical communities or other evidence of active building and continued learning.

• Competitive base salary.
• Opportunity for advancement and growth in a rapidly expanding team.
• Mentorship learning and education programs.
• Smart high-achieving motivated team that likes to have fun.
• Mission-driven culture where your work matters.
• Major Medical Health Insurance.
• Company provided equipment and tools.

If youre passionate about driving change in the FinTech landscape and being part of a company that is shaping the future of digital payments we invite you to explore opportunities with Paystand.

We understand that no candidate is perfectly qualified for any job. Experience manifests in diverse ways skills are transferable and passion is a powerful driver. Your journey and skills are unique and we value the richness that diverse perspectives bring to our team.

More than a resume we prioritize a genuine commitment impactful contributions and the ability to thrive in our dynamic collaborative environment. We are enthusiastic about providing you with opportunities to learn and grow within this role. If your experience aligns closely with what were seeking we encourage you to apply.

We celebrate the belief that diversity in backgrounds and thoughts fuels better problem-solving and fosters more creative thinking. Our commitment to adding new perspectives to the team reflects our dedication to innovation and inclusivity.

Your journey is important to us and we look forward to the possibility of welcoming you to our team at Paystand. Feel free to reach out; we cant wait to hear from you.

Most of our roles are onsite. Positions that are eligible for remote or hybrid work arrangements will be clearly indicated in the job posting.

For roles based in Mexico only resumes submitted in English will be considered.#LI-Onsite