Lead React JS Developer

Senior Full Stack Engineer (Tech Lead)

Specialist I - Software Engineering

Who We Are:

Born digital, UST transforms lives through the power of technology. We walk alongside our clients and partners, embedding innovation and agility into everything they do. We help them create transformative experiences and human-centered solutions for a better world.

UST is a mission-driven group of 29,000+ practical problem solvers and creative thinkers in more than 30 countries. Our entrepreneurial teams are empowered to innovate, act nimbly, and create a lasting and sustainable impact for our clients, their customers, and the communities in which we live.

With us, you’ll create a boundless impact that transforms your career—and the lives of people across the world.

Visit us at UST.com.

You Are:

We are seeking a Senior Full Stack Engineer (Tech Lead) with strong technical leadership and hands-on engineering depth to own delivery end-to-end and raise engineering standards across the team.

The opportunity:

·       Software Engineering Excellence

·       Design, build, and own high-quality services and user interfaces using React and the broader front-end ecosystem (TypeScript, Webpack/Vite, testing frameworks, linting/tooling).

·       Lead and perform code reviews, ensuring readability, maintainability, testability, performance, and security.

·       Champion CI/CD, automated testing, observability, and secure-by-design engineering practices.

·       Ensure solutions meet scalability, reliability, accessibility, and compliance requirements.

·       Front End & React Technology Leadership

·       Provide expert-level guidance during design discussions, code reviews, and developer syncs to ensure React choices align with product vision and long-term architecture.

·       Advise on component design, shared libraries, performance tuning, and UI patterns that support long-term scalability.

·       Drive adoption of modern React techniques; mentor developers to elevate React proficiency and engineering craft.

·       Collaborate with Product/UX to deliver user-centric and accessible designs.

·       Project & Delivery Leadership

·       Lead complex engineering initiatives from discovery through production release, ensuring predictable, high-quality delivery.

·       Develop and maintain technical plans, delivery roadmaps, and mitigation strategies for technical risks/dependencies.

This position description identifies the responsibilities and tasks typically associated with the performance of the position. Other relevant essential functions may be required.

What you need:

·       10+ years of software engineering experience.

·       2+ years of full stack development experience on JVM / Spring Boot platforms.

·       Demonstrated experience leading delivery with distributed teams across regions/time zones (example: 3 developers, 1 QA, 1 BA in staggered working hours model).

·       Required Technical Skills

·       JavaScript, TypeScript

·       ReactJS with testing (Jest / Vitest)

·       AngularJS with testing (Karma / Jasmine) (legacy exposure acceptable)

·       CSS / HTML with best practices for accessibility and security

·       Build/CI tooling: Jenkins, Gradle

·       Backend: Spring Boot

·       Database: MongoDB

·       UI frameworks: Bootstrap, Material UI

·       Strong understanding of secure coding practices to prevent vulnerabilities across UI and API layers.

·       Required Behavioral / Professional Skills

·       Strong technical leadership with ability to set architectural direction and influence engineering standards.

·       Ability to learn new tools/technologies quickly and apply them effectively.

·       Strong problem-solving skills able to tackle complex challenges using experience, creativity, and multiple sources of information.

·       Excellent communication skills, with the ability to convey complex concepts clearly and concisely.

·       Nice to Have (Preferred)

·       Experience building or maintaining a React design system / component library.

·       Experience with observability tooling (monitoring/logging/tracing) and performance optimization.

·       Experience working closely with security teams or implementing application security controls.

Compensation can differ depending on factors including but not limited to the specific office location, role, skill set, education, and level of experience. UST provides a reasonable range of compensation for roles that may be hired in various U.S. markets as set forth below.

Role Location: Ontario

Compensation Range: $115,000-$144,000

Benefits

Full-time, regular employees accrue a minimum of 10 days of paid vacation per year, receive 6 days of paid sick leave each year (pro-rated for new hires throughout the year), paid holidays, and are eligible for paid bereavement leave and jury duty. They and their dependents residing in Canada are eligible for Supplemental Healthcare coverage, as well as Company-paid Employee Only basic life insurance and accidental death and dismemberment coverage.

Full-time temporary employees receive 6 days of paid sick leave each year (pro-rated for new hires throughout the year). They and their dependents residing in Canada are eligible for Supplemental Healthcare coverage, as well as Company-paid Employee Only basic life insurance and accidental death and dismemberment coverage.

Part-time regular and temporary employees receive 6 days of paid sick leave each year (pro-rated for new hires throughout the year).

All Canadian employees who work in a province, territory or locality with more generous paid sick leave benefits than specified here will receive the benefit of those sick leave laws.

What we believe:

We proudly embrace the values that have shaped UST since day one. We build our culture of Humility, Humanity, and Integrity. These values inspire us to nurture a people-first, human centric culture that fosters diversity, prioritizes sustainable solutions, and keeps our people and clients at the forefront of all decisions.

Humility:

We will listen, learn, be empathetic and help selflessly in our interactions with everyone.

Humanity:

Through business, we will better the lives of those less fortunate than ourselves.

Integrity:

We honor our commitments and act with responsibility in all our relationships.

An Equal Opportunity Workplace, Free of Discrimination and Harassment

At UST, we strive to provide a work environment free of discrimination and harassment. We are an equal opportunity employer and employment decisions are based on merit and business needs. Our Human Rights Policy further illustrates our stand on this. We are committed to following fair employment practices that provide equal opportunities to all employees. We do not discriminate or allow harassment on the basis of race, color, religion, disability, gender, national origin, sexual orientation, gender identity, gender expression, age, genetic information, military status, or any other legally protected status. At UST, we value diversity and believe that a diverse workplace builds a competitive advantage.

Un lieu de travail à égalité des chances, sans Discrimination et harcèlement

Chez UST, nous nous efforçons de fournir un environnement de travail exempt de discrimination et harcèlement. Nous sommes un employeur garantissant l''égalité des chances et des décisions en matière d''emploi sont basés sur le mérite et les besoins de l''entreprise. Notre politique en matière de droits de l''homme illustre notre position à ce sujet. Nous nous engageons à respecter un emploi équitable des pratiques qui offrent des chances égales à tous les employés. Nous ne faisons pas discriminer ou permettre le harcèlement sur la base de la race, de la couleur, de la religion, du handicap, genre, origine nationale, orientation sexuelle, identité de genre, expression de genre, âge, informations génétiques, statut militaire ou tout autre statut légalement protégé. Chez UST, nous valorisons la diversité et pensons qu''un lieu de travail diversifié crée un avantage compétitif.

UST reserves the right to periodically redefine your roles and responsibilities based on the requirements of the organization and/or your performance.

At UST, we use AI technology in our hiring process to verify candidate identity and ensure assessment integrity. This includes confirming that candidates complete interviews and assessments independently, without unauthorized assistance. By applying, you consent to this process. If you require accommodations, please contact .

Accommodation

Your accessibility is important to us. Please let us know if you’d like accommodations (including accessible meeting rooms, captioning for virtual interviews, etc.) to help us remove barriers so that you can participate throughout the interview process. If you require accommodations at any point during the recruitment process, please let a member of our recruiting team know.