Software Engineer II

We are looking for a Software Engineer II to join our Mailgun Send team. The Mailgun Send team builds and maintains our customer-facing Mailgun and internal Admin applications, helping customers manage their email sending, configure domains, monitor delivery, and troubleshoot issues while giving internal teams the tools to support them.

In this role, you will build modern frontend experiences using React and TypeScript. You will work closely with product managers, designers, and engineers to make complex email workflows intuitive, deliver reliable features, and improve the applications our customers and internal teams use every day.

Your Impact & Responsibilities

• Build and maintain frontend applications using React and TypeScript

• Develop reusable and scalable UI components

• Build data-heavy interfaces, including tables, filtering, reporting, and configuration forms

• Integrate with backend APIs, managing asynchronous data, loading states, errors, and validation

• Collaborate with product managers, designers, and engineers to deliver features that meet customer and business needs Improve application performance, usability, accessibility, and reliability

• Participate in code reviews, testing, and troubleshooting, including investigating production issues with backend and support teams

• Contribute to technical discussions and improvements to development practices

• 2+ years of software engineering experience

• Strong experience with React and TypeScript

• Experience building single-page applications and reusable frontend components

• Experience consuming RESTful APIs and managing frontend state, asynchronous data fetching, and caching

• Strong understanding of HTML, CSS, and modern frontend development practices

• Experience with frontend testing tools such as Cypress, Jest, or Playwright

• Familiarity with Git, code review, and CI/CD workflows

• Strong collaboration, communication, and problem-solving skills

Who You Are

• You are a frontend engineer with strong experience in React and TypeScript

• You enjoy making complex workflows intuitive for customers and internal teams

• You care about usability, accessibility, performance, and maintainable code

• You collaborate well with product managers, designers, and engineers to turn ideas into working features

• You ask thoughtful questions, clarify requirements, and work through ambiguity with your team

• You are comfortable integrating APIs and building interfaces with forms, tables, and reporting

• You take ownership of your work, from implementation and testing to troubleshooting issues in production

• You communicate clearly with both technical and non-technical teammates

• Experience working on SaaS products, internal tools, or administrative applications is a plus

• Familiarity with data visualization, observability, or monitoring tools is a plus

• Experience with Go and/or Node.js is a plus

This is a remote opportunity, but candidates must reside near one of our hub locations for occasional collaboration: Atlanta, GA; Chicago, IL; San Antonio, TX; Denver, CO

• STAY HEALTHY : We offer comprehensive market competitive medical, dental, and vision plans. A variety of supplemental plans are also provided to meet your individual needs including access to telehealth for all participants.

• CARE FOR YOURSELF: Take advantage of our free virtual counselling resources through our global Employee Assistance Program. Your mental health is as important as your physical health.

• SECURE YOUR FUTURE: Plan for your future with our Roth and Pre-tax 401(k) options including an employer match for all participants.

• TAKE A BREAK: Enjoy a generous paid time off program. We value balance and understand that performance at work requires time to rest at home and/or rejuvenate on vacation.

• PUT FAMILY FIRST: We know that families can be built in a variety of ways; therefore, we offer paid parental leave and family planning support.

• WORK WHEREVER: Our flexible remote work offerings allow you to work wherever you are the most productive and successful. It is what you do, not where you work, that matters.

• MAKE AN IMPACT: Support betterment in your community and beyond by taking paid time off to support a volunteer program of your choice.

Sinch is pioneering the way the world communicates. More than 150,000 businesses - including Google, Uber, Paypal , Visa, Tinder, and many others - rely on Sinch’s Customer Communications Cloud to power engaging customer experiences through mobile messaging, voice, and email.

Whether you need to verify users or craft omnichannel campaigns, Sinch makes it easy. Our AI-infused Super Network, APIs, and applications ensure you can connect with your customers reliably and securely, at every step of their journey.

At Sinch we “Dream Big”, “Win Together”, “Keep it simple”, and “Make it Happen”. These values are our foundation!