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Head of Security
Tonic AI
Remote, United States
- Partner with engineering to build security into the development lifecycle, from design review through release, so products ship securely and on time.
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Windows Engineer, Lead
Koniag Government Services
Vienna, VA
Kadiak, a Koniag Government Services company, is seeking an experienced AWS Windows Engineer, Lead to spearhead the design, deployment, and management of our Windows-based infrastructure…
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Electrical Engineer - Kiewit Nuclear Solutions, Knoxville, TN, Lenexa, KS, Houston, TX
Kiewit
Lenexa, KS · Houston, TX · Knoxville, TN
- $123,000 to $129,000 USD / year
Join our dynamic team as an Electrical Engineer where you will contribute to the complete lifecycle of electrical systems design for advanced commercial nuclear and Department of Energy…
Added 1 min ago
RC
MEP Manager
RJM CONSTRUCTION LLC
Golden Valley, MN
- $125,000 to $190,000 USD / year
…preconstruction through post-occupancy, partnering with clients, design teams, trade partners, and internal project teams to identify solutions, mitigate risks, and achieve project…
Added 1 min ago
Systems Engineer Principal
SAIC
Fort Belvoir, VA
SAIC has an opportunity for a Ground Systems Engineer to join an elite team providing Systems Engineering and Technical Advisory (SETA) services in Springfield, VA. The selected candidate…
Added 1 min ago
Systems Engineer
SAIC
San Diego, CA
SAIC is seeking a highly motivated Systems Engineer to support advanced Information Warfare, cybersecurity, networking, and enterprise information technology initiatives for the U.S. Navy…
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MLO Engineer (Machine Learning Operations)
Stratolaunch
Mojave, CA
The AI Solutions Engineer contributes to the development, integration, and operation of AI capabilities across Stratolaunch. The Enterprise Software Team integrates a mix of COTS and custom…
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Field Engineer - Controls & Automation (F&G Designer) - Prudhoe Bay, AK
Worley
Prudhoe Bay, AK
The F&G Field Designer/ Field Engineer will interact with Worley construction sites, clients, and management to support the planning and technical portion of various projects. Review…
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Field Engineer - Electrical O&M - Prudhoe Bay, AK
Worley
Prudhoe Bay, AK
The Electrical Field Engineer plays a vital part of our Operations and Maintenance (O&M) team planning, directing, coordination and review of Electrical and Instrumentation engineering in…
Added 1 min ago
AA
Software Dev Eng II–AMZ001658
Amazon Advertising LLC
Seattle, WA
- $143,700 to $194,400 USD / year
Offered Position: Software Dev Engineer II – AMZ001658
Added 1 min ago
ECAD Application Engineer, Amazon Leo
Amazon Kuiper Manufacturing Enterprises LLC
Bellevue, WA
As an ECAD Tools Application Engineer, you will be responsible for providing a stable, reliable set of Electrical Computer Aided Design (ECAD) tools and database management for electrical…
Added 1 min ago
Member of Technical Staff, Frontier AI & Robotics
Amazon.com Services LLC
San Francisco, CA
…intelligent robotic systems to life. As a Robotics Lab & Support Engineer, you'll own the full lifecycle of robot prototypes - precision assembly, wiring and electrical integration, system…
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Sr Software Development Engineer, Amazon Leo, LEO Pop Control Plane
Amazon Kuiper Manufacturing Enterprises LLC
Sunnyvale, CA
…communities around the world. As a Senior Software Development Engineer on the networking team, you will architect and build the data-plane and control-plane traffic processing systems that…
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Software Development Engineer - Amazon LEO, LEO Pop Control Plane
Amazon Kuiper Manufacturing Enterprises LLC
Sunnyvale, CA
…communities around the world. As a Senior Software Development Engineer on the networking team, you will architect and build the data-plane and control-plane traffic processing systems that…
Added 2 mins ago
Design Systems Engineer - Engines
Stellantis
Auburn Hills, MI
The Design Systems Engineer is responsible for coordinating the technical aspects of base engine design to achieve customer requirements, functional objectives, and quality targets. Scope…
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Design Release Engineer - Oil Pans and Covers
Stellantis
Auburn Hills, MI
Proven understanding of Design Release Engineer responsibilities.
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Vehicle Dynamics Performance Engineer
Stellantis
Chelsea, MI
The Project Performance Engineer (PPE) for Vehicle Dynamics is responsible for achieving vehicle level ride and handling targets for Stellantis Vehicles. The candidate will coordinate with…
Added 2 mins ago
CV
Quality Engineer
Cambridge Valley Machining Inc.
Cambridge, NY
- $75,000 to $92,000 USD / year
Cambridge Valley Machining (CVM) is a family-owned and operated company providing comprehensive design through manufacturing services for startups, Fortune 500 businesses, and other…
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Lead Software Engineer - Backend Java, Payments Technology
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Executes software solutions, design, development, and technical troubleshooting with ability to think beyond routine or conventional approaches to build solutions or break down technical…
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GIS Solution Engineer - Transportation
Esri
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Tell our story. Present technical demonstrations of proposed solutions to customers. Successfully design presentations for technical and non-technical customers. Provide best practices…
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GIS Solution Engineer - Transportation
Esri
Philadelphia, PA
Tell our story. Present technical demonstrations of proposed solutions to customers. Successfully design presentations for technical and non-technical customers. Provide best practices…
Added 3 mins ago
Maintenance Engineer
Luxfer Magtech - Cincinnati
Cincinnati, OH
PRIMARY RESPONSIBILITIES: The Maintenance Engineer supports the Engineering Manager and manufacturing operations through the design, improvement, implementation, and optimization of…
Added 3 mins ago
WU
Senior Site Reliability Engineer, Risk and Compliance Platforms - Austin, TX (Hybrid)
Western Union, LLC
United States
- $125,000 to $140,000 USD / year
We are looking for an accomplished Senior Site Reliability Engineer who has built and operated high-volume, always-on platforms where disruption, silent data loss, or incomplete processing…
Added 4 mins ago
IG
Embedded Software Engineer
Insight Global
North Reading, MA
- From $100 USD / hour
In this role, you will design, implement, and maintain software that interfaces directly with hardware and operating system components while providing robust APIs and services to…
Added 4 mins ago
V
Senior Software Engineer - Platforms
Versant
New York, NY
- $110,000 to $160,000 USD / year
We are looking for a Senior Full-Stack Software Engineer to join our growing engineering team. You will play a key role in designing and building scalable, secure, and user-centric…

Mercor

Software Engineer, Applied AI - Systems

San Francisco, CA, United States

$220,000 to $500,000 USD / year

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Job details

Pay: $220,000 to $500,000 USD / year
Experience: 2–5 years of professional backend engineering experience building and operating production systems.
Posting language: English
Posted: Nov 9, 2026

Original job description

ABOUT MERCOR

Mercor's mission is to organize human intelligence to power the AI economy. We're a leading AI data company, building the layer between human expertise and frontier models. Millions of domain experts on the platform are paid over $4 million per day to train frontier AI models. Mercor's APEX benchmark family measures AI's real-world impact on professional work. Mercor Enterprise brings this same infrastructure to Fortune 500 companies: helping companies capture how their best people actually work, translating that expertise directly back into agents.

Mercor is creating a new category of work where expertise powers AI advancement. Achieving this requires an ambitious, fast-paced and deeply committed team. You’ll work alongside researchers, operators, and AI companies at the forefront of shaping the systems that are redefining society. Mercor is a profitable Series C company valued at $10 billion. We work in-person five days a week in our San Francisco, NYC, or London offices.

ABOUT THE ROLE

The Applied AI org builds the systems that turn human expertise into training data for frontier models, task pipelines, expert workflows, evaluation infrastructure, and the services that tie them together. We have synthetic pipelines and modular quality control systems that run in unison to generate highest quality tasks and at scale. All of it runs on backend systems that have to stay correct, fast, and observable while the volume behind them grows every month.

As a Software Engineer on Backend Systems, you'll own services in that stack: designing the data models, building the APIs, services, data pipelines that move work through the platform. This is a build role. You'll take a problem that's roughly scoped, make the design calls, ship it to production, and own it afterward.

We're hiring for depth in backend fundamentals rather than any particular domain. If you've built and operated real services, handled the schema migration that couldn't take downtime, found the query that fell over at 10x traffic, designed the retry logic that made a flaky dependency invisible to users, or build a system that recover when things break that's the experience that matters here. You'll work with a talent dense group of engineers who will review your designs and push your thinking, and you'll be expected to grow into owning larger surfaces quickly.

WHAT YOU WILL DO

Design, build, and operate backend services in the Applied AI stack including APIs, data models, background jobs, and the pipelines that connect them.
Own features end to end: scope the problem, write the design, ship the code, instrument it, and keep it healthy in production.
Build and tune high-throughput data and job pipelines: queuing, batching, idempotency, retries, and backpressure.
Make the system fast and reliable by adding failure recovery in pipelines, profile hot spots, Agent token and cost attribution, caching issues, and set latency, error, cost budgets you actually hold to.
Instrument what you ship: observability, metrics, logging, tracing, and alerts that proactively catch problems.
Work on modern cutting edge tools, libraries and frameworks.
Manage and launch 10s of 1000s of containers, sandbox environments, manage resource allocation and system health.
Manage infrastructure as code using Terraform.
Participate in on-call for the systems you own, debug production incidents, and write up what you learn in RCCA.
Write clear design docs and give useful code review, we make technical decisions in writing and expect everyone to take part.
Work directly with product, operations, and research partners to turn ambiguous requirements into systems that ship.

WHAT WE ARE LOOKING FOR

2–5 years of professional backend engineering experience building and operating production systems.
Strong fundamentals in backend engineering: data structures, algorithms, concurrency, and writing code that's clear enough for the next person to change.
Hands-on experience with API design - REST, gRPC, or GraphQL, and an understanding of versioning, contracts, and backward compatibility.
Solid database skills: relational data modeling, indexing, query performance, transactions and isolation, and safe migrations. Familiarity with at least one NoSQL or key-value store and when it's the right choice.
Practical experience with distributed systems basics: queues and event streams, caching, idempotency, rate limiting, and designing for partial failure.
Experience with Data Orchestration and workflow management systems like Airflow, Temporal, Dagster.
Be able to roll your sleeves up and dig deeper into the lower level infrastructure issues container, permissions, logs, traces and find the needle in the haystack.
Experience running services in production: containers, CI/CD, monitoring and alerting, and debugging issues under real traffic.
Comfort with ambiguity you can take a loosely defined problem, ask the right questions, and come back with a plan.
Genuine excitement for agentic development and new technology, fluency with modern AI dev tools (e.g. Claude Code, Cursor, Copilot), and a real passion for writing good code.
Clear written and verbal communication. High ownership, pragmatism, and a bias toward shipping.

NICE TO HAVE

Experience building or integrating with LLM-backed services in production (evaluation, orchestration, or serving).
Familiarity with AI infrastructure providers like Modal, Fireworks, Baseten, Temporal

BENEFITS

Bi-annual performance bonus structure
Generous equity grant vested over 4 years
Up to $15k Relocation bonus
$10K housing bonus (if you live within 0.5 miles of our office)
$1.5K monthly stipend for meals
Free Equinox membership
$200 monthly laundry reimbursement
$200 monthly personal wellness reimbursement
Health, Dental, Vision insurance

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More about this job

Skills

Quality control systems
Data models
Plan resource allocation
Monitor infrastructure
IBM Terraform
Research
API development
GraphQL
Data modelling
NoSQL
Workflow
Apache Airflow
CI/CD
Debugging
Communication skills

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