Internship Slack Software Engineer Jobs in Brooklyn, NY

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Job Category

Software Engineering

Job Details

About Salesforce

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Ready to level-up your career at the company leading workforce transformation in the agentic era? You're in the right place! Agentforce is the future of AI, and you are the future of Salesforce.

Senior Software Engineer, Frontend Builds & Tooling - Slack
The Frontend Developer Experience team empowers developers to write, build, test, and deploy code seamlessly across mobile, desktop, and multiple operating systems while solving unique scaling challenges. That means improving reliability, speeding up feedback loops, reducing cognitive load, and actively listening to developer pains to prioritize the work that matters most. We're shaping a development environment where engineers stay in flow with fast builds, minimal friction, and tooling that feels intuitive rather than intrusive. As part of the DevXP Pillar, we focus on enhancing developers' experiences and productivity through tooling, processes, and support. As part of this team you will be making the development inner loop faster of hundreds of developers by making the FE toolchain efficient and reliable.
About Slack
Slack is your Digital HQ - a place where work flows between your people, systems, partners, and customers. From Fortune 100 companies to corner markets, millions of people around the world use Slack to connect their teams, unify their systems, and drive their business forward.
Slack breaks down communication silos inside and beyond your organization by bringing teams and tools together around common goals, projects and processes in channels and in Slack Connect. It removes the limits of physical walls, giving people the flexibility to do their best work where, when and how they prefer with features like huddles and clips. And it empowers everyone to automate common tasks with apps and workflows. In this digital-first era, Slack's mission is to make people's work lives simpler, more pleasant, and more productive.
What You Will Be Doing

• You'll speed up our frontend development cycle by making Slack's frontend builds faster and more performant
• You'll brainstorm novel solutions to big, challenging problems to make engineer's lives simpler and more productive
• You'll collaborate with your team and others to bring these solutions to life
• You'll trace, measure and improve the performance characteristics of our internal systems
• You'll improve engineering standards, tooling, and processes across the Slack org
• You'll identify gaps and challenges, explore potential solutions, and build a roadmap for frontend tooling.
• - You'll mentor other engineers and deeply review code

• Build and ship high-quality, production-grade software using modern engineering practices, with AI as a core part of your development workflow by pushing the boundaries of AI development tools to deliver secure, optimized, and high-quality code.

• Design and orchestrate complex systems where AI agents integrate seamlessly into human workflows, driving efficiency and innovation at scale.

• Contribute to building and maintaining the shared system context, an explicit repository of system designs, constraints, and standards that enables AI to operate accurately and reliably.

• Critically evaluate code (Human or AI-generated) for correctness, quality, security, and performance

Requirements

• 8+ years experience writing JavaScript or TypeScript
• 5+ years experience with configuring and optimizing modern frontend toolchains and build tools (i.e. Webpack, Rspack)
• 5+ year experience building and debugging complex systems in a team environment
• 5+ year experience with CI/CD tools
• 3+ years experience with tsc and/or tsgo
• Bachelor's degree in Computer Science, Engineering or a related field, or equivalent training, fellowship, or work experience
• Strong communication skills, a positive attitude, and empathy
• Self-motivation and the ability to take initiative independently, learn quickly, and meet deadlines.

• A demonstrated, genuine AI-first approach to engineering. Using AI to move faster, build fluency across the stack, and contribute well beyond your core specialty.

• Experience using AI tools (e.g., Claude Code, GitHub Copilot, Codex, Cursor, etc.) in development workflows

• Advanced prompt engineering skills and the ability to write precise, structured prompts and cultivate the system context that makes AI outputs reliable, secure, and production-ready.

Bonus Points

• Experience with yarn workspaces
• Experience with Typescript Project References
• Experience with CSS tooling (less, Sass, PostCSS, Lightning CSS)
• Experience with frontend linters like ESLint, Oxlint, Biome
• Experience investigating and improving JavaScript performance
• Experience with PHP or Hack
• Experience (or interest) in the Rust programming language
• Experience with React, Redux

Unleash Your Potential

When you join Salesforce, you'll be limitless in all areas of your life. Our benefits and resources support you to find balance andbe your best, and our AI agents accelerate your impact so you cando your best. Together, we'll bring the power of Agentforce to organizations of all sizes and deliver amazing experiences that customers love. Apply today to not only shape the future - but to redefine what's possible - for yourself, for AI, and the world.

Accommodations

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Posting Statement

Salesforce is an equal opportunity employer and maintains a policy of non-discrimination with all employees and applicants for employment. What does that mean exactly? It means that at Salesforce, we believe in equality for all. And we believe we can lead the path to equality in part by creating a workplace that's inclusive, and free from discrimination. Know your rights: workplace discrimination is illegal. Any employee or potential employee will be assessed on the basis of merit, competence and qualifications - without regard to race, religion, color, national origin, sex, sexual orientation, gender expression or identity, transgender status, age, disability, veteran or marital status, political viewpoint, or other classifications protected by law. This policy applies to current and prospective employees, no matter where they are in their Salesforce employment journey. It also applies to recruiting, hiring, job assignment, compensation, promotion, benefits, training, assessment of job performance, discipline, termination, and everything in between. Recruiting, hiring, and promotion decisions at Salesforce are fair and based on merit. The same goes for compensation, benefits, promotions, transfers, reduction in workforce, recall, training, and education.

In the United States, compensation offered will be determined by factors such as location, job level, job-related knowledge, skills, and experience. Certain roles may be eligible for incentive compensation, equity, and benefits. Salesforce offers a variety of benefits to help you live well including: time off programs, medical, dental, vision, mental health support, paid parental leave, life and disability insurance, 401(k), and an employee stock purchasing program. More details about company benefits can be found at the following link: https://www.salesforcebenefits.com.Pursuant to the San Francisco Fair Chance Ordinance and the Los Angeles Fair Chance Initiative for Hiring, Salesforce will consider for employment qualified applicants with arrest and conviction records.At Salesforce, we believe in equitable compensation practices that reflect the dynamic nature of labor markets across various regions. The typical base salary range for this position is $172,500 - $260,100 annually. In select cities within the San Francisco and New York City metropolitan area, the base salary range for this role is $207,800 - $285,800 annually. The range represents base salary only, and does not include company bonus, incentive for sales roles, equity or benefits, as applicable.