Seamless Contacts, Inc
Senior Growth Full-Stack Engineer - Remote US
Seamless Contacts, Inc, Columbus, Ohio, United States, 43224
United States
The Opportunity
We’re looking for a Senior Growth Full-Stack Engineer to join our Activation team at Seamless.AI. This role sits at the intersection of engineering, product, and growth, helping us design, build, and run experiments that accelerate user onboarding, engagement, and activation. You’ll partner closely with growth product managers, designers, and analysts to rapidly ship and iterate on experiments that improve how new users discover value in Seamless.AI. Responsibilities
Collaborate with growth, product, and data teams to design and implement A/B tests and growth experiments focused on user activation. Build, deploy, and maintain full-stack features and experiment infrastructure (frontend + backend). Implement and manage feature flagging systems to enable rapid testing and controlled rollouts. Work with GrowthBook (or similar experimentation platforms) to set up, track, and analyze experiments. Instrument and track user behavior in Amplitude and other analytics platforms to generate insights. Write clean, scalable, and maintainable code across the React frontend and Node.js backend. Monitor and evaluate experiment outcomes, providing actionable insights and recommendations. Balance speed of experimentation with engineering best practices, ensuring quality while moving quickly. The #1 goal of this position is to help Seamless.AI increase user activation, feature adoption, and time-to-value. These efforts will maximize customer retention & satisfaction. Skillset
5+ years of experience as a full-stack engineer (startup or growth-focused environment preferred) with SaaS product. Proficiency with modern database technologies (PostgreSQL, Vector DBs, OpenSearch, DynamoDB) Proficiency with Cloud architecture and scalability best practices, in particular AWS (Lambda, serverless, cloud-native services). Hands-on experience with A/B testing platforms (GrowthBook, Optimizely, LaunchDarkly, etc.). Familiarity with feature flag systems and controlled experiment rollout strategies. Experience with product analytics tools (Amplitude, Segment, Tableau). Ability to translate growth hypotheses into technical experiments quickly and iteratively. Strong data-driven mindset with the ability to evaluate experiment outcomes statistically. Comfortable working in fast-moving, cross-functional growth teams. Preferred : Background in PLG, growth engineering, activation, or onboarding-focused roles. Experience with event-driven architecture and scalable systems. Familiarity with in-app education & onboarding tooling (e.g., Userflow). Familiarity with Pinecone and LLMs. Experience building SaaS applications in the B2B or productivity space. Education & Requirements
Bachelor’s degree in Computer Science, Engineering, or a related field (or equivalent practical experience). Proven experience delivering full-stack features and experiment infrastructure in a fast-paced environment. Demonstrated ability to collaborate across engineering, product, and growth teams. Strong problem-solving and analytical skills with a data-first approach. Check out what our employees think about working at Seamless: CLICK HERE
Since 2015,Seamless.AI has helped sales teams maximize revenue with the world’s first real-time B2B search engine. As one of Ohio’s fastest-growing companies, we’ve earned top industry accolades, including G2’s 2025 Best Software Products (#1 Highest Satisfaction Product), Purpose Jobs’ 2024 Best Places to Work, and LinkedIn’s Top 50 Tech Startups (2020, 2022, 2023). We are committed to a diverse, inclusive workplace and do not discriminate based on race, religion, gender, sexual orientation, age, or other protected statuses. Visa sponsorship is not available; applicants must be authorized to work in the U.S. Create a Job Alert Interested in building your career at Seamless.AI? Get future opportunities sent straight to your email. Apply for this job
* indicates a required field First Name * Last Name * Email * Phone * Resume/CV * Enter manually Accepted file types: pdf, doc, docx, txt, rtf Enter manually Accepted file types: pdf, doc, docx, txt, rtf LinkedIn Profile * *Note: To help us better understand your experience and skills, please ensure your LinkedIn profile is up to date and visible before submitting your application.* Are you currently authorized to work in the US? * Select... Employment Authorization Do you now OR will you (in the future) require visa sponsorship? * Select... Employment Authorization This is a full-time, W2 position - do you wish to proceed with your application? * Select... How did you hear about Seamless.AI and this job opening? * What is your highest level of completed education? * Select... *Please note: this will be checked through an education verification on our background check should we move forward to an offer* Do you hold permanent residence in any of the following US states?We offer "Fully Remote" roles only in these states. AL, AZ, DE, FL, GA, IN, KS, KY, LA, MA, MD, MI, MO, NC, NE, NJ, NM, NV, NY(excluding NYC), OH, PA, SC, TN, TX, UT, and WI. * Select... What is your current physical address where you will be working out of should you work here at Seamless.AI? * Have you been previously employed at Seamless.AI? * Select... Select... How many years of experience do you have working with React for Frontend software development? * Select... How many years of experience do you have working with Node.js and Express.js for Backend software development? * Select... Is the majority of your experience web application focused or mobile application focused? * Select... Have your jobs in the past 5 years been primary contract positions or FTE/permanent positions? * Select... How many years of experience do you have as a PLG, activation or growth engineer? * Have you ever worked for a Software or SaaS company before? * Select... Have you used analytics tools? If so, please list the tools you have used. * Do you have hands-on experience with A/B testing platforms (GrowthBook, Optimizely, LaunchDarkly, etc.). * Select... Do you have experience building SaaS applications in the B2B or productivity space. Select... Voluntary Self-Identification
For government reporting purposes, we ask candidates to respond to the below self-identification survey.Completion of the form is entirely voluntary. Whatever your decision, it will not be considered in the hiringprocess or thereafter. Any information that you do provide will be recorded and maintained in aconfidential file. As set forth in Seamless.AI’s Equal Employment Opportunity policy,we do not discriminate on the basis of any protected group status under any applicable law. If you believe you belong to any of the categories of protected veterans listed below, please indicate by making the appropriate selection.As a government contractor subject to the Vietnam Era Veterans Readjustment Assistance Act (VEVRAA), we request this information in order to measurethe effectiveness of the outreach and positive recruitment efforts we undertake pursuant to VEVRAA. Classification of protected categoriesis as follows: A "disabled veteran" is one of the following: a veteran of the U.S. military, ground, naval or air service who is entitled to compensation (or who but for the receipt of military retired pay would be entitled to compensation) under laws administered by the Secretary of Veterans Affairs; or a person who was discharged or released from active duty because of a service-connected disability. A "recently separated veteran" means any veteran during the three-year period beginning on the date of such veteran's discharge or release from active duty in the U.S. military, ground, naval, or air service. An "active duty wartime or campaign badge veteran" means a veteran who served on active duty in the U.S. military, ground, naval or air service during a war, or in a campaign or expedition for which a campaign badge has been authorized under the laws administered by the Department of Defense. An "Armed forces service medal veteran" means a veteran who, while serving on active duty in the U.S. military, ground, naval or air service, participated in a United States military operation for which an Armed Forces service medal was awarded pursuant to Executive Order 12985. Select... Voluntary Self-Identification of Disability
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We are a federal contractor or subcontractor. The law requires us to provide equal employment opportunity to qualified people with disabilities. We have a goal of having at least 7% of our workers as people with disabilities. The law says we must measure our progress towards this goal. To do this, we must ask applicants and employees if they have a disability or have ever had one. People can become disabled, so we need to ask this question at least every five years. Completing this form is voluntary, and we hope that you will choose to do so. Your answer is confidential. No one who makes hiring decisions will see it. Your decision to complete the form and your answer will not harm you in any way. If you want to learn more about the law or this form, visit the U.S. Department of Labor’s Office of Federal Contract Compliance Programs (OFCCP) website at www.dol.gov/ofccp . How do you know if you have a disability?
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We’re looking for a Senior Growth Full-Stack Engineer to join our Activation team at Seamless.AI. This role sits at the intersection of engineering, product, and growth, helping us design, build, and run experiments that accelerate user onboarding, engagement, and activation. You’ll partner closely with growth product managers, designers, and analysts to rapidly ship and iterate on experiments that improve how new users discover value in Seamless.AI. Responsibilities
Collaborate with growth, product, and data teams to design and implement A/B tests and growth experiments focused on user activation. Build, deploy, and maintain full-stack features and experiment infrastructure (frontend + backend). Implement and manage feature flagging systems to enable rapid testing and controlled rollouts. Work with GrowthBook (or similar experimentation platforms) to set up, track, and analyze experiments. Instrument and track user behavior in Amplitude and other analytics platforms to generate insights. Write clean, scalable, and maintainable code across the React frontend and Node.js backend. Monitor and evaluate experiment outcomes, providing actionable insights and recommendations. Balance speed of experimentation with engineering best practices, ensuring quality while moving quickly. The #1 goal of this position is to help Seamless.AI increase user activation, feature adoption, and time-to-value. These efforts will maximize customer retention & satisfaction. Skillset
5+ years of experience as a full-stack engineer (startup or growth-focused environment preferred) with SaaS product. Proficiency with modern database technologies (PostgreSQL, Vector DBs, OpenSearch, DynamoDB) Proficiency with Cloud architecture and scalability best practices, in particular AWS (Lambda, serverless, cloud-native services). Hands-on experience with A/B testing platforms (GrowthBook, Optimizely, LaunchDarkly, etc.). Familiarity with feature flag systems and controlled experiment rollout strategies. Experience with product analytics tools (Amplitude, Segment, Tableau). Ability to translate growth hypotheses into technical experiments quickly and iteratively. Strong data-driven mindset with the ability to evaluate experiment outcomes statistically. Comfortable working in fast-moving, cross-functional growth teams. Preferred : Background in PLG, growth engineering, activation, or onboarding-focused roles. Experience with event-driven architecture and scalable systems. Familiarity with in-app education & onboarding tooling (e.g., Userflow). Familiarity with Pinecone and LLMs. Experience building SaaS applications in the B2B or productivity space. Education & Requirements
Bachelor’s degree in Computer Science, Engineering, or a related field (or equivalent practical experience). Proven experience delivering full-stack features and experiment infrastructure in a fast-paced environment. Demonstrated ability to collaborate across engineering, product, and growth teams. Strong problem-solving and analytical skills with a data-first approach. Check out what our employees think about working at Seamless: CLICK HERE
Since 2015,Seamless.AI has helped sales teams maximize revenue with the world’s first real-time B2B search engine. As one of Ohio’s fastest-growing companies, we’ve earned top industry accolades, including G2’s 2025 Best Software Products (#1 Highest Satisfaction Product), Purpose Jobs’ 2024 Best Places to Work, and LinkedIn’s Top 50 Tech Startups (2020, 2022, 2023). We are committed to a diverse, inclusive workplace and do not discriminate based on race, religion, gender, sexual orientation, age, or other protected statuses. Visa sponsorship is not available; applicants must be authorized to work in the U.S. Create a Job Alert Interested in building your career at Seamless.AI? Get future opportunities sent straight to your email. Apply for this job
* indicates a required field First Name * Last Name * Email * Phone * Resume/CV * Enter manually Accepted file types: pdf, doc, docx, txt, rtf Enter manually Accepted file types: pdf, doc, docx, txt, rtf LinkedIn Profile * *Note: To help us better understand your experience and skills, please ensure your LinkedIn profile is up to date and visible before submitting your application.* Are you currently authorized to work in the US? * Select... Employment Authorization Do you now OR will you (in the future) require visa sponsorship? * Select... Employment Authorization This is a full-time, W2 position - do you wish to proceed with your application? * Select... How did you hear about Seamless.AI and this job opening? * What is your highest level of completed education? * Select... *Please note: this will be checked through an education verification on our background check should we move forward to an offer* Do you hold permanent residence in any of the following US states?We offer "Fully Remote" roles only in these states. AL, AZ, DE, FL, GA, IN, KS, KY, LA, MA, MD, MI, MO, NC, NE, NJ, NM, NV, NY(excluding NYC), OH, PA, SC, TN, TX, UT, and WI. * Select... What is your current physical address where you will be working out of should you work here at Seamless.AI? * Have you been previously employed at Seamless.AI? * Select... Select... How many years of experience do you have working with React for Frontend software development? * Select... How many years of experience do you have working with Node.js and Express.js for Backend software development? * Select... Is the majority of your experience web application focused or mobile application focused? * Select... Have your jobs in the past 5 years been primary contract positions or FTE/permanent positions? * Select... How many years of experience do you have as a PLG, activation or growth engineer? * Have you ever worked for a Software or SaaS company before? * Select... Have you used analytics tools? If so, please list the tools you have used. * Do you have hands-on experience with A/B testing platforms (GrowthBook, Optimizely, LaunchDarkly, etc.). * Select... Do you have experience building SaaS applications in the B2B or productivity space. Select... Voluntary Self-Identification
For government reporting purposes, we ask candidates to respond to the below self-identification survey.Completion of the form is entirely voluntary. Whatever your decision, it will not be considered in the hiringprocess or thereafter. Any information that you do provide will be recorded and maintained in aconfidential file. As set forth in Seamless.AI’s Equal Employment Opportunity policy,we do not discriminate on the basis of any protected group status under any applicable law. If you believe you belong to any of the categories of protected veterans listed below, please indicate by making the appropriate selection.As a government contractor subject to the Vietnam Era Veterans Readjustment Assistance Act (VEVRAA), we request this information in order to measurethe effectiveness of the outreach and positive recruitment efforts we undertake pursuant to VEVRAA. Classification of protected categoriesis as follows: A "disabled veteran" is one of the following: a veteran of the U.S. military, ground, naval or air service who is entitled to compensation (or who but for the receipt of military retired pay would be entitled to compensation) under laws administered by the Secretary of Veterans Affairs; or a person who was discharged or released from active duty because of a service-connected disability. A "recently separated veteran" means any veteran during the three-year period beginning on the date of such veteran's discharge or release from active duty in the U.S. military, ground, naval, or air service. An "active duty wartime or campaign badge veteran" means a veteran who served on active duty in the U.S. military, ground, naval or air service during a war, or in a campaign or expedition for which a campaign badge has been authorized under the laws administered by the Department of Defense. An "Armed forces service medal veteran" means a veteran who, while serving on active duty in the U.S. military, ground, naval or air service, participated in a United States military operation for which an Armed Forces service medal was awarded pursuant to Executive Order 12985. Select... Voluntary Self-Identification of Disability
Form CC-305 Page 1 of 1 OMB Control Number 1250-0005 Expires 04/30/2026 Voluntary Self-Identification of Disability Form CC-305 Page 1 of 1 OMB Control Number 1250-0005 Expires 04/30/2026 Why are you being asked to complete this form?
We are a federal contractor or subcontractor. The law requires us to provide equal employment opportunity to qualified people with disabilities. We have a goal of having at least 7% of our workers as people with disabilities. The law says we must measure our progress towards this goal. To do this, we must ask applicants and employees if they have a disability or have ever had one. People can become disabled, so we need to ask this question at least every five years. Completing this form is voluntary, and we hope that you will choose to do so. Your answer is confidential. No one who makes hiring decisions will see it. Your decision to complete the form and your answer will not harm you in any way. If you want to learn more about the law or this form, visit the U.S. Department of Labor’s Office of Federal Contract Compliance Programs (OFCCP) website at www.dol.gov/ofccp . How do you know if you have a disability?
A disability is a condition that substantially limits one or more of your “major life activities.” If you have or have ever had such a condition, you are a person with a disability.
Disabilities include, but are not limited to: Alcohol or other substance use disorder (not currently using drugs illegally) Autoimmune disorder, for example, lupus, fibromyalgia, rheumatoid arthritis, HIV/AIDS Blind or low vision Cancer (past or present) Cardiovascular or heart disease Celiac disease Cerebral palsy Deaf or serious difficulty hearing Diabetes Disfigurement, for example, disfigurement caused by burns, wounds, accidents, or congenital disorders Epilepsy or other seizure disorder Gastrointestinal disorders, for example, Crohn's Disease, irritable bowel syndrome Intellectual or developmental disability Mental health conditions, for example, depression, bipolar disorder, anxiety disorder, schizophrenia, PTSD Missing limbs or partially missing limbs Mobility impairment, benefiting from the use of a wheelchair, scooter, walker, leg brace(s) and/or other supports Nervous system condition, for example, migraine headaches, Parkinson’s disease, multiple sclerosis (MS) Neurodivergence, for example, attention-deficit/hyperactivity disorder (ADHD), autism spectrum disorder, dyslexia, dyspraxia, other learning disabilities Partial or complete paralysis (any cause) Pulmonary or respiratory conditions, for example, tuberculosis, asthma, emphysema Short stature (dwarfism) Traumatic brain injury
Disability Status Select... PUBLIC BURDEN STATEMENT: According to the Paperwork Reduction Act of 1995 no persons are required to respond to a collection of information unless such collection displays a valid OMB control number. This survey should take about 5 minutes to complete.
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