Junior Fullstack Engineer

Teampay; Hermosillo; On-site; MXN 300,000 - 520,000; Full time

Benefits offered by this job

Statutory benefits including IMSS, INF

Paid vacation with an enhanced premium

Annual Christmas bonus

Monthly food vouchers

Savings fund with company matching

Major medical insurance

Stock option eligibility

Company-provided equipment

Job summary

Paystand is seeking a Junior Full-Stack Engineer to join its AI-first engineering team. You will work on frontend and backend features for Paystand’s open banking network, delivering customer-ready payment experiences.

You will collaborate with designers, product managers, and senior engineers to implement robust, scalable solutions while learning to apply AI-assisted development responsibly and efficiently.

Qualifications

• Hands-on experience with AI coding assistants and development agents such as Claude Code or OpenAI Codex.

Responsibilities

• Deliver frontend and backend features for Paystand’s open banking network, taking ownership from implementation through release with guidance from experienced engineers.
• Build reusable components, APIs, and service integrations that follow established architectural patterns.
• Collaborate with product owners, designers, and engineers to translate customer and business needs into reliable payment experiences.
• Write maintainable code, develop automated tests, and troubleshoot defects to meet engineering standards for correctness and security.
• Contribute to technical discussions and code reviews, communicating progress and blockers to support timely delivery.
• Evaluate emerging AI tools and adoption within the team to improve workflows.

Skills

AI-assisted development

Builder experience

Frontend development

Backend development

Engineering fundamentals

Cloud and delivery

Quality and problem solving

Product thinking

Self-directed learning

Tools

Node.js

React

TypeScript

REST APIs

AWS

Job description

Paystand is the world's leading blockchain-enabled B2B payments network, transforming commercial finance into a software-driven, zero-fee, and open ecosystem. Recognized as a CNBC/Statista 2026 World's Top Fintech company, Paystand delivers over a decade of on-chain payments experience to middle and large enterprises. Paystand's network services more than one million payors that have moved $20+ billion in volume. With its acquisitions of Yaydoo, Teampay and Bitwage, Paystand's full-stack platform includes agentic AI, its USDb stablecoin, and AR/AP solutions on one tightly integrated network. Its non-profit arm, Paystand.org, 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 don't buy that. Every fee we eliminate compounds into growth. We're here to decentralize finance and hand the power back to the businesses driving the real economy — extended further through Paystand.org's work to democratize finance through Bitcoin and blockchain.

How We Do It

We don't 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

We're not looking for people who want a job in fintech. We're 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.

Role at a Glance

AI is core to how we build Paystand’s open banking network and transform how businesses pay and get paid. We’re seeking a Junior Full-Stack Engineer ready to tackle meaningful technical challenges and ship customer-facing payment experiences. You’ll combine AI-assisted development with sound engineering judgment, ensuring your solutions fit the broader product. Working alongside experienced engineers, you’ll own scoped frontend and backend projects, move quickly, and grow your capabilities while building software that businesses depend on.

AI-First Engineering Expectations

Paystand is an AI-first organization. We expect engineers at every level to combine AI-powered development with the technical judgment needed to build reliable software. As a Junior Full-Stack Engineer, you are expected to:

• Apply AI coding assistants and development agents across implementation, testing, debugging, and documentation to increase development velocity while maintaining engineering standards.
• Provide AI tools with clear requirements, relevant codebase context, and acceptance criteria. Critically review generated code, verify its behavior, and ensure it aligns with customer needs and existing architecture.
• Develop AI-enabled features and integrations using established architectural patterns, with technical guidance and review from experienced engineers.
• Identify opportunities to automate repetitive engineering tasks and implement improvements to testing, documentation, and development workflows.
• Evaluate emerging AI tools and development practices, assess their value for Paystand’s engineering workflows, and contribute to their adoption within the team.

Role and Key Responsibilities

• Deliver frontend and backend features for Paystand’s open banking network, taking ownership of scoped work from implementation through release with guidance from experienced engineers.
• Build reusable components, APIs, and service integrations that follow established architectural patterns and support maintainable applications.
• Collaborate with product owners, designers, and engineers to translate customer and business needs into reliable, intuitive payment experiences.
• Write maintainable code, develop automated tests, and troubleshoot defects to meet engineering standards for correctness, security, and performance.
• Contribute to technical discussions and code reviews, incorporate feedback, and communicate progress, dependencies, and blockers to support timely delivery.

Requirements & Qualifications

• AI-assisted development: Hands-on experience with AI coding assistants and development agents such as Claude Code, OpenAI Codex, or comparable tools. Ability to provide clear requirements and relevant codebase context, critically evaluate generated code, and explain how a solution meets customer needs and integrates with existing systems.
• Builder experience: 1–2 years of relevant software development experience, including internships, or demonstrated ability through substantial personal, academic, or open-source projects. Ability to explain your contributions, technical decisions, and how you validated the results.
• Frontend development: Practical experience with JavaScript or TypeScript, HTML, CSS, and a modern framework such as React, Next.js, Vue, or Angular, with attention to usability and responsive design.
• Backend development: Practical experience with a backend language or framework, such as Node.js, Python, Java, or Go, including building or integrating REST APIs and working with application data.
• Engineering fundamentals: Understanding of modular code design, relational databases, SQL, and Git-based workflows, including branches, pull requests, and code reviews.
• Cloud and delivery: Familiarity with deploying applications to AWS, Google Cloud, or a comparable platform, including through personal or academic projects. Basic understanding of CI/CD pipelines, environment configuration, and application logs, with the ability to follow established deployment workflows and troubleshoot issues with guidance.
• Quality and problem-solving: Ability to debug issues systematically, write automated tests, and validate functionality and edge cases. Foundational understanding of secure coding practices, including input validation, access controls, and handling sensitive information.
• Product thinking and collaboration: Ability to connect implementation decisions to customer and business needs, explain technical reasoning, ask focused questions, and incorporate feedback from engineering, product, and design.
• Self-directed learning and ownership: Initiative to navigate unfamiliar codebases, research and test solutions independently, and contribute early, while asking focused questions, escalating blockers, and following through on delivery.

Perks & Benefits

• Statutory benefits, including IMSS, INFONAVIT, and AFORE.
• Paid vacation with an enhanced vacation premium.
• Annual Christmas bonus (aguinaldo).
• Monthly food vouchers.
• Savings fund with a matching company contribution.
• Company-provided major medical insurance.
• Stock option eligibility under Paystand’s equity incentive plan, subject to approval.
• Company-provided equipment and tools.

If you're 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.

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 can't 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.