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About the Role

We are seeking an experienced Senior Software Engineer with a proven understanding of the C#/.NET development stack, with a strong focus on cloud services. You will be working primarily on supporting APIs and microservices across several product verticals, with a special focus on scalability and reliability. You will be joining a SaaS company in the marketing technology space, used by thousands of companies around the world.

We are currently hiring candidates who can work in our Boston, MA headquarters or Broomfield, CO office, or candidates permanently based in the following states in the USA: CO, CT, FL, GA, IL, IN, ME, MA, NH, NJ, NC, OH, PA, RI, TX.

Team Dynamic

We’re a distributed team that thrives on clear communication, thoughtful collaboration, and a deep respect for each other’s time and craft. We use the right tools for the right conversations — whether async updates or live calls. We value humility and believe the best ideas come from listening and learning. Our engineering culture emphasizes rigor through code reviews and automated testing, enabling us to ship confidently and sustainably.

You will be working alongside other passionate engineers, designers, and product owners, all focusing on delivering an excellent user experience with a strong emphasis on customer success.

Position Duties and Responsibilities

+ Design, develop, test, deploy, and maintain APIs and backend services, focusing on scalability and reliability

+ Write clean, efficient, testable code, ensuring best practices in software development are followed

+ Collaborate with cross-functional teams, including product managers, UX/UI designers, and other engineers, to translate requirements into robust, scalable solutions

+ Participate in code reviews, providing and receiving constructive feedback

+ Create and maintain technical documentation for software applications, including design documents, API documentation, and user guides

+ Contribute to the enhancement of the software development lifecycle, including automation, testing frameworks, and CI/CD pipelines

Required Experience, Skills, and Education

+ Well-founded understanding of the C# language and .NET development

+ Deep experience building RESTful APIs and distributed services, serving millions of requests per day

+ Strong foundations working with relational databases, such as MySQL and PostgreSQL

+ Comfortable following test-driven, clean coding principles

Preferred Experience, Skills, and Education

+ Experience working in the email space, particularly ISPs, ESPs, and CRMs

+ Experience with cloud services, specifically AWS

+ Experience with mobile development, including iOS and Android

+ Experience with infrastructure-as-code, e.g., Terraform and Packer

About Validity

For over 20 years, tens of thousands of organizations across the world have relied on Validity solutions to target, contact, engage, and retain customers – using trustworthy data as a key advantage. Validity’s flagship products – Everest, DemandTools, BriteVerify, a nd GridBuddy Connect – are all highly rated, #1 solutions for sales and marketing professionals. These solutions deliver smarter email campaigns, more qualified leads, more productive sales, and ultimately faster growth.

Validity is a truly unique company - massive revenue growth, top-tier investors, 5-star product ratings, proven ability to acquire and integrate top tech companies and welcome them into the Validity family, a winning culture, and a work environment that fosters hard work, trust, and fun.

Headquartered in Boston, Validity has offices in Denver, London, Sao Paulo, and Sydney. For more information, connect with us on LinkedIn, Instagram, and Twitter.

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Validity is proud to be an equal opportunity employer. We are committed to providing equal employment opportunities to all employees and applicants for employment regardless of actual or perceived race, color, ancestry, national origin, citizenship, religion or creed, age, physical or mental disability, medical condition, AIDs/HIV status, genetic information, military and veteran status, sex, parental status (including pregnancy and pregnancy-related conditions, childbirth, post childbirth, nursing mother, parent of a young child and parent of a foster child), gender (including gender identity and expression), sexual orientation, marital status (including registered domestic partner status), or any other characteristic protected by applicable federal, state, or local law.

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