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L4 Software Engineer Jobs in Seattle, WA (NOW HIRING)

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Software Engineer

Seattle, WA

$219K/yr

Software Engineer Responsibilities: * Architect and lead delivery of Meta Compute's cloud-native ... L4/L7 load balancing, NAT/conntrack, firewalls/policy, network virtualization) * Hands-on ...

Frontdoor, Inc.

Innovation Software Engineer

Seattle, WA · On-site

$85 - $135/hr

Responsibilities We are looking for a senior, curious, and hands‑on Software Engineer (L4) to join our Innovation team. You will lead the design and development of Proof‑of‑Concepts (PoCs) and ...

SpaceX

Sr. Software Engineer, Starlink Network

Redmond, WA · On-site

$160K - $225K/yr

Proven expertise in IP packet processing at L3/L4 layers, including DPDK, XDP/eBPF or user-space ... Software Engineer/Level I: $160,000.00 - $225,000.00/per year Your actual level and base salary ...

SpaceX

Sr. Software Engineer, Starlink Network

Redmond, WA · On-site

$160K - $225K/yr

Proven expertise in IP packet processing at L3/L4 layers, including DPDK, XDP/eBPF or user-space ... Software Engineer/Level I: $160,000.00 - $225,000.00/per year Your actual level and base salary ...

Nvidia

Senior Software Engineer, AI Networking

Seattle, WA

$139K - $183K/yr

We are seeking an outstanding Software Engineer to join our US-based networking software team. As a ... L4 fundamentals, and performance/latency tradeoffs. * Proven low-level software expertise with ...

Nvidia

Senior Software Engineer, AI Networking

Seattle, WA · On-site

$139K - $183K/yr

We are seeking an outstanding Software Engineer to join our US-based networking software team. As a ... L4 fundamentals, and performance/latency tradeoffs. Proven low-level software expertise with ...

Microsoft

Senior Software Engineer

Redmond, WA · On-site

$137K - $180K/yr

Design, implement, and operate L4 and L7 ingress components - gateways, proxies, load balancing and ... Software Engineering IC4 - The typical base pay range for this role across the U.S. is USD $119,800 ...

Salesforce, Inc.

Software Engineering MTS

Bellevue, WA · On-site

Job Category Software Engineering Job Details About Salesforce Salesforce is the #1 AI CRM, where ... We provide simple declarative interfaces for L4/L7 load balancing, TLS termination, end-to-end ...

LiveRamp

Software Engineer - Healthcare

Seattle, WA · On-site

$135K - $159K/yr

You'll collaborate with L4/L5 engineers to resolve technical hurdles and keep team priorities on track. * Contribute to the product cycle by providing technical feedback on specs and participating in ...

Zscaler

Senior Staff Rust Developer

Bellevue, WA · Hybrid

$61.50 - $81.25/hr

This is a hybrid role based in San Jose, CA reporting to the Sr. Director, Software Engineering ... Hands-on experience with gRPC, Protobufs, and L2-L4 networking protocols including TCP/IP, QUIC, or ...

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All JobsL4 Software Engineer JobsL4 Software Engineer Jobs in Seattle, WA

L4 Software Engineer information

See Seattle, WA salary details

$72.3K

$168K

$234K

How much do l4 software engineer jobs pay per year?

As of Sep 6, 2026, the average yearly pay for l4 software engineer in Seattle, WA is $167,980.00, according to ZipRecruiter salary data. Most workers in this role earn between $136,600.00 and $197,000.00 per year, depending on experience, location, and employer.

What is an L4 software engineer?

An L4 Software Engineer typically refers to a mid-level software engineer, often used at companies like Google and other large tech firms. L4 engineers are expected to have several years of experience and are responsible for designing, developing, testing, and maintaining software systems. They often collaborate with cross-functional teams, mentor junior engineers, and contribute to technical planning. The role requires strong coding abilities, problem-solving skills, and a solid understanding of software engineering best practices. Career progression from L4 usually leads to senior engineering roles.

What are the key skills and qualifications needed to thrive as an L4 software engineer?

To thrive as an L4 Software Engineer, you need strong programming skills, a solid grasp of computer science fundamentals, and typically a bachelor's degree in computer science or a related field. Experience with version control systems (like Git), cloud platforms (such as AWS or GCP), and familiarity with development frameworks and CI/CD pipelines are commonly required. Excellent problem-solving, communication, and teamwork skills help you collaborate effectively and contribute to complex projects. These competencies ensure you can deliver high-quality software solutions efficiently while working within diverse engineering teams.

How does an L4 software engineer typically collaborate with product managers and designers during a project?

As an L4 Software Engineer, you'll work closely with product managers and designers throughout the software development cycle. This collaboration often involves participating in planning meetings, providing technical feedback on proposed features, and helping to shape user stories or requirements. You'll be expected to offer insights on feasibility, suggest improvements, and ensure alignment between engineering and product goals. Regular communication and a proactive approach to problem-solving are key to ensuring successful project outcomes.

What is the difference between L4 Software Engineer vs L5 Software Engineer?

AspectL4 Software EngineerL5 Software Engineer
ExperienceTypically 2-4 yearsTypically 4-6 years
ResponsibilitiesContributes to projects, writes code, fixes bugsLeads small projects, mentors juniors, designs solutions
SkillsProficient coding, basic system designAdvanced coding, system architecture, leadership
CertificationsOptional, depends on companyOptional, but often preferred

In summary, an L4 Software Engineer is an early-career professional focused on coding and task completion, while an L5 Software Engineer takes on more leadership, design, and mentorship responsibilities, reflecting increased experience and skills.

How much do L4 software engineers make?

L4 software engineers typically earn a base salary ranging from $120,000 to $180,000 annually, depending on the company, location, and experience. They often receive additional compensation such as bonuses, stock options, and benefits, especially in large tech firms or competitive markets.

What are popular job titles related to L4 Software Engineer jobs in Seattle, WA?

For L4 Software Engineer jobs in Seattle, WA, the most frequently searched job titles are:

What job categories do people searching L4 Software Engineer jobs in Seattle, WA look for?

The top searched job categories for L4 Software Engineer jobs in Seattle, WA are:

L4 Software Engineer jobs near you
Infographic showing various L4 Software Engineer job openings in Seattle, WA as of August 2026, with employment types broken down into 87% Full Time, 9% Part Time, and 4% Contract. Highlights an 89% Physical, 3% Hybrid, and 8% Remote job distribution, with an average salary of $167,980 per year, or $80.8 per hour.

Software Engineer

Facebook App

Seattle, WA

$219K/yr

Full-time

Posted 10 days ago

Meta rating

7.8

Company rating: 7.8 out of 10

Based on 45 frontline employees who took The Breakroom Quiz

139th of 247 rated software companies

Job description

Meta is investing heavily on the Meta Cloud. As part of this push we want to build a cloud-native infrastructure optimized for AI development. As part of the Meta Compute Initiative, we’re evolving this foundation to support a cloud-native, Kubernetes-first AI infrastructure—including platform primitives like network virtualization, load balancing/service connectivity, and distributed firewall/policy enforcement—at Meta scale. This is a chance to lead architecture and delivery while influencing a broad cross-functional ecosystem, leveraging (and contributing to) open source where it helps us move faster. We build the platform layer and partner closely with the many application teams that run on top.
Software Engineer Responsibilities:
  • Architect and lead delivery of Meta Compute’s cloud-native host networking platform, owning end-to-end technical direction from design through production rollout
  • Build/modernize Kubernetes networking features integrated with Meta’s host networking stack (e.g., dataplane integration, operability, scaling characteristics)
  • Design and implement core networking primitives: network virtualization, load balancing/service connectivity, and distributed firewalling/policy enforcement
  • Drive time-to-market execution: define milestones, de-risk key technical choices early and deliver iterative production increments
  • Lead broad cross-functional alignment across compute, storage, platform, security, and hardware/fabric partners—owning interfaces/contracts and end-to-end outcomes
  • Leverage and influence open-source ecosystems: evaluate open-source building blocks, contribute improvements where needed, and ensure Meta’s solution is maintainable and operable long-term

Minimum Qualifications:
  • Bachelor's degree in Computer Science, Computer Engineering, relevant technical field, or equivalent practical experience
  • 10+ years of experience in software development for networking or infrastructure systems, or PhD with 4+ years of experience in a relevant technical area
  • 4+ years proven experience designing and shipping networking dataplane/control-plane systems in production (e.g., host networking, L4/L7 load balancing, NAT/conntrack, firewalls/policy, network virtualization)
  • Hands-on Kubernetes networking experience in production (e.g., CNI, Services, NetworkPolicy/policy models, service connectivity/load balancing integration)
  • Proficiency in C/C++ and at least one scripting language (Python/Shell Scripting)
  • Experience with developing and automating test suites
  • Demonstrated experience working across disciplines to align on technical decisions and deliver integrated solutions

Preferred Qualifications:
  • Experience collaborating closely with hardware and ASIC design teams, contributing to hardware specifications, co-designing hardware-software interfaces, and influencing silicon feature sets based on software requirements
  • Direct experience with DPU SoC/SmartNIC Platforms
  • Expertise in high-performance networking frameworks and techniques such as DPDK, eBPF/XDP, AF_XDP, io_uring, kernel bypass, zero-copy I/O, and RDMA/RoCEv2
  • Experience building or contributing to Kubernetes operators, controllers, or device plugins that manage hardware-accelerated networking or storage resources
  • Familiarity with Linux networking internals such as netdev subsystem, TC/iptables/nftables, network namespace isolation, traffic shaping, and kernel driver development
  • Experience in hyperscale or cloud-provider environments

About Meta:
Meta builds technologies that help people connect, find communities, and grow businesses. When Facebook launched in 2004, it changed the way people connect. Apps like Messenger, Instagram and WhatsApp further empowered billions around the world. Now, Meta is moving beyond 2D screens toward immersive experiences like augmented and virtual reality to help build the next evolution in social technology. People who choose to build their careers by building with us at Meta help shape a future that will take us beyond what digital connection makes possible today—beyond the constraints of screens, the limits of distance, and even the rules of physics.
Meta is proud to be an Equal Employment Opportunity and Affirmative Action employer. We do not discriminate based upon race, religion, color, national origin, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender, gender identity, gender expression, transgender status, sexual stereotypes, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics. We also consider qualified applicants with criminal histories, consistent with applicable federal, state and local law. Meta participates in the E-Verify program in certain locations, as required by law. Please note that Meta may leverage artificial intelligence and machine learning technologies in connection with applications for employment.
Meta is committed to providing reasonable accommodations for candidates with disabilities in our recruiting process. If you need any assistance or accommodations due to a disability, please let us know at accommodations-ext@meta.com.
$219,000/year to $301,000/year + bonus + equity + benefits
Individual compensation is determined by skills, qualifications, experience, and location. Compensation details listed in this posting reflect the base hourly rate, monthly rate, or annual salary only, and do not include bonus, equity or sales incentives, if applicable. In addition to base compensation, Meta offers benefits. Learn more about benefits at Meta.

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