Senior Full Stack Engineer

Mobi.AI; Somerville (MA); Hybrid; USD 150,000 - 190,000; Full time

Benefits offered by this job

Base salary + annual bonus

Health insurance for you and family

Disability & life insurance

Equity ownership

401(k)

Unlimited PTO + $1k bonus for time off

Job summary

Mobi.AI is hiring a Senior Full Stack Engineer to design and build cutting-edge web experiences and AI-driven solutions for travel brands. You will shape technologies powering Mobi’s portfolio of AI products, collaborating with product, design, and other engineers to deliver reliable experiences for travelers.

This hands-on role spans the stack, from intuitive product interfaces to APIs and services that power them, with a focus on scalable, high-performance systems.

Qualifications

• Bachelor’s degree in Computer Science, Engineering, or related field—or equivalent practical experience.
• Proficiency in Python.
• Familiarity with testing frameworks (e.g., Jest, Cypress, Playwright).
• Proficiency with backend APIs and RESTful services.
• Experience with AWS compute and storage services (e.g. Lambda, DynamoDB).
• Experience and comfort using AI Tools to automate workflows.
• Strong problem-solving skills and a collaborative mindset.
• Understanding of MCP and Agent frameworks.

Responsibilities

• Develop, test, and maintain scalable MCP and agent applications using modern frameworks and libraries.
• Build, maintain, and optimize APIs and infrastructure.
• Collaborate with cross-functional teams to define, design, and ship new features.
• Optimize applications for maximum speed, scalability, and performance.
• Review code to troubleshoot, debug, and resolve issues; Implement best practices for code quality, testing, and maintainability.
• Follow best practices for testing and evaluation of agent applications, including unit, integration, and end-to-end testing.
• Stay current with trends, tools, and emerging technologies in AI and computer science.

Skills

Python

Strong problem-solving

Collaborative mindset

MCP/Agent frameworks

Education

Bachelor’s degree in Computer Science or related field

Tools

AWS Lambda

DynamoDB

RESTful APIs

Jest

Cypress

Playwright

CodeX

Claude Code

Copilot

Job description

About Mobi.AI

Mobi partners with the world's leading travel brands to create AI experiences that change how people discover and book travel.

About Mobi.AI

Mobi partners with the world's leading travel brands to create AI experiences that change how people discover and book travel. By combining deep AI expertise with more than a decade of experience in travel commerce, Mobi helps travel brands understand what travelers want, deliver more relevant experiences, and convert AI-driven intent into direct bookings. Our technology connects the intelligence of AI with the realities of travel—integrating with the systems brands already use while creating new opportunities to engage customers throughout their journey. We're building the infrastructure that will power the next generation of travel commerce.

Working at Mobi

We believe the best ideas emerge when diverse perspectives come together, so we’re building a team that truly reflects that belief. If you’re energized by complex challenges, inspired by working alongside thoughtful teammates, and passionate about building technology that enhances—rather than replaces—what makes us human, you’ll feel right at home here.

Our Work Is Centered On Five Core Values

• Show up, be you. We welcome every kind of thinker, maker, and teammate: quiet or bold, methodical or messy, with all their talents and quirks. Inclusion isn’t a checkbox—it’s how we connect, grow together, and do our best work.
• Be scrappy, stay steady. We’re resilient and quick on our feet, adapting with creativity and staying grounded when things shift.
• Create transparency, collaborate better. We believe knowledge grows when it’s shared. Clear, open communication builds trust and strengthens collaboration.
• Foster community, be compassionate. We show up for our teammates, customers, and neighbors. Strong businesses grow from relationships built with care and grounded in shared effort.
• Build thoughtfully, create impact. We design for clarity, build for scale, and measure success through real-world impact.

About The Role

As a Senior Full Stack Engineer, you’ll join a collaborative, highly creative, and fast-paced team to design and build cutting-edge web experiences and AI-driven solutions. You’ll play a key role as both architect and developer, shaping technologies that power Mobi’s portfolio of travel AI products —used by some of the world’s leading brands.

This is a hands-on role with the opportunity to work across the stack—from building intuitive product experiences to developing the APIs, services, and systems that power them. You’ll work closely with product, design, and other engineers to turn complex problems into simple, reliable experiences for our customers and their travelers.

Key Responsibilities

• Develop, test, and maintain scalable MCP and agent applications using modern frameworks and libraries.
• Build, maintain, and optimize APIs and infrastructure.
• Collaborate with cross-functional teams to define, design, and ship new features.
• Optimize applications for maximum speed, scalability, and performance.
• Review code to troubleshoot, debug, and resolve issues; Implement best practices for code quality, testing, and maintainability.
• Follow best practices for testing and evaluation of agent applications, including unit, integration, and end-to-end testing.
• Stay current with trends, tools, and emerging technologies in the field of computer science and artificial intelligence.

Qualifications

• Bachelor’s degree in Computer Science, Engineering, or related field—or equivalent practical experience.
• Proficiency in Python.
• Familiarity with testing frameworks (e.g., Jest, Cypress, Playwright).
• Proficiency with backend APIs and RESTful services.
• Experience with AWS compute and storage services (e.g. Lambda, DynamoDB).
• Experience and comfort using AI Tools (CodeX, Claude Code, Copilot, etc.) to automate workflows.
• Strong problem-solving skills and a collaborative mindset.
• Understanding of MCP and Agent frameworks.

Benefits & Perks

• Competitive Base Salary + Annual Bonus
• Comprehensive Health Insurance (Medical, Dental, and Vision) for you and your family, covered mostly by the company.
• Company-paid Disability and Life Insurance
• Optional Pet Insurance and Identity Theft Protection
• Paid Parental Leave (for all types of parents and families)
• Equity ownership in the company
• 401k Plan
• Unlimited Paid Time Off + $1,000 Bonus for taking five consecutive days off
• Flexibility to work anywhere in the world for one month a year
• Tuition Reimbursement
• Cell Phone & Transportation ReimbursementLunch daily from local restaurants
• Cozy office environment with a full kitchen, massage chairs, live plants, and much more!

Mobi hires those willing to work either full-time in office or on a hybrid schedule.

Equal Opportunity

We are an equal opportunity employer; applicants, employees, and former employees are protected from employment discrimination and harassment of any type based on race, color, religion, sex (including pregnancy, sexual orientation, or gender identity), national origin, age, disability, protected veteran status and genetic information (including family medical history), or any other characteristic protected by federal, state or local laws.

Pay Transparency

The base salary range for this US full-time position is $150,000-$190,000 and is eligible for an annual company bonus, subject to standard withholding and applicable taxes. All candidates receive equity (ISO) and access to a comprehensive benefits offering. The base salary range reflects the minimum and maximum targets for candidates. The following factors are considered when determining the compensation offered: work location, skills, experience, and any relevant education or training. The Recruiter or Hiring Manager can share more about the specific salary range with you during the recruitment process and answer any questions you have.