Senior Software Engineer III, Backend

Connexity | Skimlinks, a Taboola company; Los Angeles (CA); Hybrid; USD 175,000 - 200,000; Full time

Benefits offered by this job

Health care plans

401k matching

Life insurance

Paid leave

Free food & snacks

Wellness resources

Equity

Job summary

Connexity, a Taboola company, is seeking a Senior Software Engineer III, Backend for our Internal Tools team. You will help build a new advertiser management platform unifying legacy systems with scalable backend services, APIs, and a robust data model.

The role requires 10+ years in backend development, expert Java and Spring Boot, REST API design, relational databases, and distributed systems experience. This is a hybrid role headquartered in Santa Monica.

Qualifications

• 10+ years of backend development experience.
• Proficiency in Java; Python/Node.js/Go also required.
• Hands-on with Spring Boot and RESTful APIs.
• Relational DB design and query optimization (MySQL/PostgreSQL).
• Experience with distributed systems and microservices.
• Experience using AI coding tools in daily workflow.

Responsibilities

• Backend design and implementation of scalable systems.
• Develop APIs, microservices, and server-side components for platform features.
• Contribute to architecture and design decisions for backend systems.
• Design relational schemas and optimize queries as system of record.
• Collaborate with PMs, designers, and engineers on new features.
• Maintain code quality with testing, reviews, and documentation.
• Evaluate new tools and AI-assisted tooling to improve velocity.

Skills

Java

Python

Node.js

Go

RESTful API design

Spring Boot

Distributed systems

AI-assisted development

Agile development

Microservices

Education

Bachelor's degree in CS/Engineering

Tools

Spring Boot

MySQL

PostgreSQL

BigQuery

NoSQL databases

Job description

About Us:

Connexity, a Taboola company, is a data-driven retail performance marketing and commerce platform that helps online retailers acquire new customers and drive incremental sales at a cost that meets their ROI objectives. As the leading independent source of new customers and sales for retailers, we manage the complexities of new customer acquisition on behalf of thousands of retailers. Connexity technology connects merchants like Walmart, Wayfair and Macy's with high-intent shoppers across a vast and complex network of publishers, creators, search and marketplace channels. We joined forces with Taboola in 2021, own ShopYourLikes and Skimlinks, making us the largest, open-web performance platform in the Retail & eCommerce space, generating $5B of GMV/retail sales per year.

About the Role:

We are seeking a skilled and motivated Senior Software Engineer III, Backend to join our Internal Tools team. Our team owns the design and implementation of our next-generation internal tools platform — a new advertiser management platform that unifies several legacy systems under a single, modern foundation, with a focus on high-performance middleware and backend services.

You will play a central role in building this platform from the ground up: designing APIs and services, shaping the data model, and collaborating with cross-functional teams to deliver scalable, high-performance solutions.

Responsibilities:

• Backend Development: Design, implement, and maintain scalable backend systems. Develop APIs, microservices, and other server-side components that power platform features and functionality.
• Architecture and Design: Contribute to the architecture and design of backend systems. Ensure solutions are reliable, scalable, and performant, and make informed decisions on technology choices and system design.
• Data Modeling: Design and optimize relational database schemas and queries that serve as the system of record for the platform.
• Collaboration: Work closely with product managers, designers, and engineers to define and implement new features and improvements.
• Problem-Solving: Identify and troubleshoot complex technical issues, provide effective solutions, and optimize system performance. Continuously improve and refactor the codebase to enhance scalability and maintainability.
• Code Quality: Maintain high standards for code quality, including thorough testing, code reviews, and documentation.
• Innovation: Stay current with industry trends and emerging technologies. Evaluate and recommend new tools, frameworks, and libraries — including AI-assisted development tooling — to strengthen our stack and our team's velocity.

• Experience: 10+ years of professional experience in backend development, with a track record of designing and delivering high-performance systems.
• Programming Languages: Proficiency in Java is a must. Experience with Python, Node.js, or Go is also required.
• Backend Frameworks: Hands-on experience with Spring Boot is a must.
• API Development: Solid knowledge of RESTful API design, best practices, and implementation.
• Database Skills: Strong expertise in relational databases (e.g., MySQL, PostgreSQL), including schema design, query optimization, and reasoning about data integrity and consistency. Experience with NoSQL databases or analytical warehouses (e.g., BigQuery) is also required.
• System Design: Strong understanding of software architecture, design patterns, and system design principles. Experience building and maintaining distributed systems and microservices.
• AI-Assisted Development: Practical, hands-on experience using AI coding tools (e.g., Claude Code, GitHub Copilot, Cursor) as part of your daily development workflow — for code generation, refactoring, test writing, and debugging. You should be able to critically evaluate AI-generated code, recognize when it is wrong or subtly unsafe, and take full ownership of everything you ship. Experience integrating LLM APIs into applications or building internal AI-powered tooling is a plus.
• Methodologies: Experience working in Agile development environments.
• Work Authorization: Eligible to work in the United States.
• Education: A degree in Computer Science, Engineering, or a related field is preferred but not required.

Voted “Best Places to Work,” our culture is driven by self-starters, team players, and visionaries. Headquartered in Santa Monica, the company operates sites and business services in the US, EMEA, and APAC. We offer top benefits including flexible time off, paid holidays, competitive comp, team events and more!

• Health Care Plans (Medical, Dental & Vision)
• Retirement Plan (401k Matching)
• Life Insurance (Basic, Voluntary & AD&D), LTD & STD
• Paid Leave Benefits (Maternity, Paternity & Medical)
• Free Food & Snacks
• Wellness Resources
• Equity

We are committed to providing a culture at Connexity that supports the diversity, equity and inclusion of our most valuable asset, our people. We encourage individuality and are driven to represent a workplace that celebrates our differences, and provides opportunities equally across gender, race, religion, sexual orientation, and all other demographics. Our actions across Education, Recruitment, Retention, and Volunteering reflect our core company values and remind us that we’re all in this together to drive positive change in our industry.

The pay for this position is 175000-200000 USD annually and depends on several factors such as location, job-related knowledge, skills, and experience. We offer many perks as part of the compensation package that include equity, Flexible Time Off (FTO), medical/dental/vision insurance, a competitive 401(k) match, paid parental leave, and more.

This position is hybrid preferred, with three days per week in our Santa Monica office. Flexibility available depending on location.