Senior Solutions Engineer - Messaging APIs

Freelance Latin America; United States; Remote; USD 120,000 - 190,000; Full time

Benefits offered by this job

Fully remote work environment

Long-term collaboration

Structured workflows

Training and onboarding support

Work with international teams

Exposure to modern tools

Collaborative culture

Career growth

Job summary

Freelance Latin America is seeking a Senior Solutions Engineer to support a U.S.-based technology organization, focusing on messaging and WhatsApp Business API integrations. This fully remote role rewards hands-on engineers with strong API experience and the ability to guide partner engagements from technical evaluation to deployment.

You will review partner code and Postman collections, lead multiple client projects, and collaborate with cross-functional teams to improve processes and tooling.

Qualifications

• Hands-on experience with WhatsApp Business API required.
• Ability to review partner code and Postman collections to validate specs.
• Strong API integration assessment against documented rubrics.
• Fluent English with professional communication.

Responsibilities

• Review partner code and Postman collections for technical alignment.
• Lead technical client engagements and coordinate with cross-functional teams.
• Independently manage technical aspects of multiple projects.
• Identify recurring integration challenges and propose improvements.
• Contribute to vendor onboarding tooling and internal workflows.

Skills

WhatsApp Business API

Lead client engagements

Code review

API integration evaluation

English fluency

Analytical problem solving

Tools

Postman

Git

Job description

Role Overview

We are looking for a Senior Solutions Engineer to support a U.S.-based technology-focused organization working with messaging and communication APIs. This remote role is ideal for a technically strong, intellectually curious engineer with hands‑on WhatsApp Business API experience who can evaluate partner integrations, lead technical client engagements, and improve technical processes and tooling.

Duties / Task to perform

Review partner code and Postman collections to confirm integrations are fully built to technical specifications, not simply functional for demonstration purposes. Evaluate and score technical integration requirements against documented rubrics, ensuring consistent and defensible pass/fail decisions. Serve as the technical lead for multiple client engagements, collaborating with project and operational leads throughout the integration lifecycle. Independently manage the technical aspects of client projects while escalating appropriate issues to leadership. Provide clear updates on the technical status of assigned projects and identify recurring integration challenges. Recommend improvements to technical processes and products based on patterns observed across partner implementations. Contribute to vendor onboarding tooling for Apple APIs by proposing feature and code improvements based on real‑world usage and technical reviews. Help improve technical review processes and internal tooling as you become familiar with existing workflows.

Requirements

Senior‑level Solutions Engineering capabilities with hands‑on experience working with the WhatsApp Business API. Previous WhatsApp API experience with a major messaging platform, Business Solution Provider (BSP), or technology provider. Ability to review partner code, APIs, integrations, and Postman collections at a technical level. Strong understanding of API integration requirements and the ability to assess implementations against documented specifications. Ability to write and review code directly; AI tools should be used as support rather than as a substitute for hands‑on technical capability. Ability to independently lead the technical aspects of multiple client projects and determine when escalation is necessary. Strong analytical and problem‑solving skills with an interest in improving technical processes and tooling. Fluent English with strong professional communication skills and familiarity with U.S. business culture expectations. Collaborative, intellectually curious, and comfortable working with cross‑functional teams. Ability to successfully complete a criminal background check.

Schedule & availability

Full‑time, remote | Monday through Friday, 8:00 AM to 3:00 PM San Francisco time zone.

Benefits

• Fully remote work environment
• Stable, long‑term collaboration
• Clear scope of responsibilities and structured workflows
• Training and onboarding support
• Opportunity to work with international teams
• Exposure to modern tools and professional processes
• Supportive and collaborative work culture
• Opportunity for skill development and career growth

Before You Apply, Please Read:

• These are professional roles with set schedules defined by the client. Consistent availability is expected. You will have a set work schedule determined by the client, and you are expected to be present during those hours.
• You will be part of the client’s team. You’ll follow their company guidelines, communication practices, and workflows, ensuring seamless collaboration.
• KPIs and goals matter. Your performance will be measured to ensure alignment with client expectations and project objectives.
• Training may be required. You might need to complete training to fully understand your role, tools, and client processes.
• Commitment and responsibility are essential. We work with clients who rely on your dedication to deliver consistent, high‑quality results. This is key to building trust and long‑term partnerships.