Senior Software Engineer, Agentic Ads Experience

Fdetimes; United States; À distance; USD 191 000 - 267 000; Plein temps

Avantages offerts par ce poste

Comprehensive Healthcare Benefits and

401k Match

Family Planning Support

Gender‑Affirming Care

Mental Health & Coaching Benefits

Flexible Vacation & Reddit Global Days

Generous parental leave

Paid Volunteer time off

Résumé du poste

Reddit's Ads team is seeking a Senior Software Engineer to build AI-powered advertiser experiences on the Agentic Ads Experience platform. You will own features end-to-end, from problem framing to rollout, with a strong emphasis on reliability and guardrails.

The role requires shipping production AI systems, collaborating across PM, Design, Data Science, and Sales/Ops, and communicating trade-offs clearly. Base salary range is $190,800–$267,100 USD with equity and benefits.

Qualifications

• 5+ years Shipping and operating production software systems.
• Hands-on experience building generative AI apps: structured outputs, tool calls, prompts, RAG.
• Strong enthusiasm for agents/LLMs with opinions on tools and evolving ecosystem.
• Solid fundamentals: APIs, distributed systems, queues, data stores, auth, retries, observability.
• Experience defining evals/metrics for AI systems and launch quality.
• Fluent with AI coding tools and code‑assistant workflows.
• Excellent communication for remote collaboration and explaining AI trade-offs.
• Proficient in languages: Python, Golang, Rust, Java, JavaScript (any).

Responsabilités

• Design, build, and ship advertiser-facing AI features end-to-end.
• Decide how to use generative AI: single-shot calls, workflows, or agent loops.
• Build for failure modes of LLMs: guardrails, retries, cost controls, tracing.
• Define offline/online evals and connect model metrics to outcomes.
• Ensure data isolation, permissioning, auditability, and policy compliance.
• Collaborate with PM, Design, Data Science, ML Platform, and Sales/Ops.
• Write design docs and communicate trade-offs to engineers and non‑engineers.

Connaissances

Generative AI

LLM calls

Prompt design

Distributed systems

Observability

Python

JavaScript

Outils

Docker

Description du poste

Reddit is a community of communities. It’s built on shared interests, passion, and trust, and is home to the most open and authentic conversations on the internet. Every day, Reddit users submit, vote, and comment on the topics they care most about. With 100,000+ active communities and approximately 130 million daily active unique visitors, Reddit is one of the internet’s largest sources of information. For more information, visit www.redditinc.com.

Team Description

Reddit's Ads business is at an inflection point, and generative AI is reshaping how advertisers plan, build, launch, measure, and optimize campaigns. The Agentic Ads Experience team is building the next generation of advertiser-facing interfaces: campaign assistants, creative and ad copy generation, one-click campaign creation, audience discovery, conversational analytics, and optimization recommendations. This is a unique opportunity to join a fast-moving team shipping generative AI/agentic systems into a high-growth Ads product, where every launch has direct advertiser and revenue impact.

Role Description

As a Senior Software Engineer on the Agentic Ads Experience team, you will design, build, and ship AI-powered product experiences that change how advertisers work with Reddit Ads Platform. You will own features end-to-end: framing the problem, choosing the right combination of software, LLM calls, tools, orchestration, and guardrails, and driving them through rollout, measurement, and refinement. The ideal candidate is a strong product-focused software engineer with hands-on generative AI application experience, who has an opinionated point of view on where agents, workflows, skills, and retrieval belong, and who cares deeply about shipping reliable systems that advertisers actually trust.

Responsibilities

• Product Execution: Design and ship advertiser-facing AI features and platform (campaign assistants, creative generation, audience discovery, performance analytics, optimization recommendations) end-to-end, from prototype to GA.
• Agentic Systems Design: Make the right architectural calls on if and how to use generative AI, whether it’s a single-shot LLM call, a workflow, a skill, a retrieval system, an agent loop, human review, or no AI at all.
• Reliability and Guardrails: Build for the failure modes of LLMs — structured outputs, tool/action boundaries, retries, cost controls, tracing, evals, and human-in-the-loop where it matters.
• Measurement: Define offline and online evals, instrument traces, run A/B tests, and connect model and product metrics to advertiser and business outcomes.
• Safety and Trust: Design for data isolation, permissioning, auditability, and policy compliance when AI systems take action on behalf of advertisers.
• Collaboration: Partner closely with PM, Design, Data Science, ML Platform, Trust, and sales/ops to turn ambiguous problems into concrete, shippable systems. Collaborate with other product teams on how best to expose their services and capabilities to the platform’s centralized agent(s).
• Craft and Communication: Write clear design docs, explain trade-offs to non-engineers, and raise the bar on how the org ships gen AI features.

Required Qualifications

• 5+ years of experience as a software engineer, with a track record of shipping and operating production systems.
• Hands‑on experience building generative AI applications: structured outputs, function/tool calling, prompt and context design, RAG, model routing, and handling model failure modes.
• Genuine enthusiasm for agents and LLMs — you follow the space closely, have opinions on the tools, and can talk shop about the evolving ecosystem.
• Strong systems fundamentals: APIs, distributed systems, queues, data stores, service ownership, auth, idempotency, retries, and observability.
• Experience defining evals and measurement for AI systems — offline datasets, online metrics, and knowing when and how to measure a launch quality bar.
• Fluent with AI coding tools and code‑assistant workflows as part of your day‑to‑day engineering practice.
• Excellent communication skills. You can collaborate effectively in a remote environment and explain complex AI system trade-offs to technical and non‑technical audiences.
• Extensive software development experience in one or more general purpose languages: Python, Golang, Rust, Java, JavaScript, etc.

Bonus Points

• Experience in Ads, marketing technology, marketplaces, growth, recommendations, search, or analytics.
• Experience building AI systems where mistakes are expensive: customer‑facing products, regulated workflows, policy review, payments, or high‑scale infrastructure.
• Experience building internal workflow automation for sales, ops, support, policy, trust, or engineering productivity.

Benefits

• Comprehensive Healthcare Benefits and Income Replacement Programs
• 401k Match
• Family Planning Support
• Gender‑Affirming Care
• Mental Health & Coaching Benefits
• Flexible Vacation & Reddit Global Days Off
• Generous paid Parental Leave
• Paid Volunteer time off

#li-remote

Pay Transparency

This job posting may span more than one career level.

In addition to base salary, this job is eligible to receive equity in the form of restricted stock units, and depending on the position offered, it may also be eligible to receive a commission. Additionally, Reddit offers a wide range of benefits to U.S.-based employees, including medical, dental, and vision insurance, 401(k) program with employer match, generous time off for vacation, and parental leave. To learn more, please visit https://www.redditinc.com/careers/.

To provide greater transparency to candidates, we share base salary ranges for all US-based job postings regardless of state. We set standard base pay ranges for all roles based on function, level, and country location, benchmarked against similar stage growth companies. Final offer amounts are determined by multiple factors including, skills, depth of work experience and relevant licenses/credentials, and may vary from the amounts listed below.

The base salary range for this position is

$190,800—$267,100 USD

In select roles and locations, the interviews will be recorded, transcribed and summarized by artificial intelligence (AI). You will have the opportunity to opt out of recording, transcription and summarization prior to any scheduled interviews.

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