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Senior Software Engineer Startup Jobs (NOW HIRING)

Permute AI, Inc

Senior Software Engineer

Chicago, IL · On-site

$180K - $280K/yr

Permute (www.permute.ai) Overview Permute is seeking a Senior Software Engineer to design, build, and deploy production-grade AI systems in a fast-moving startup environment. This role is for ...

Fuku

Senior Software Engineer

San Francisco, CA · Hybrid

$180K - $220K/yr

Senior Software Engineer Location: San Francisco (hybrid, 3 days in-office; NYC option depending on ... High About the Company The Company is a small, fast-paced startup in the Creator Tech industry. The ...

Fuku

Senior Software Engineer

San Francisco, CA · On-site

$180K - $220K/yr

Senior Software Engineer Location: San Francisco (hybrid, 3 days in-office; NYC option depending on ... High About the Company The Company is a small, fast-paced startup in the Creator Tech industry. The ...

Titan

Senior Software Engineer

New York, NY · On-site

$175K - $300K/yr

Senior Software Engineer About Titan: Titan is an AI holding company transforming IT services with ... Ship fast and iterate, balancing speed with quality in a fast-paced, startup environment. Who You ...

Titan

Senior Software Engineer

San Francisco, CA

$144K - $190K/yr

Senior Software Engineer About Titan: Titan is an AI holding company transforming IT services with ... Ship fast and iterate, balancing speed with quality in a fast-paced, startup environment. Who You ...

Fuku

Senior Software Engineer

San Francisco, CA · On-site

$144K - $190K/yr

Senior Software Engineer Location: San Francisco, CA (required 5 days/week in-office) Type ... S taff-level or quickly promoted engineer at a startup or AI-first company * F ormer founder or ...

Fuku

Senior Software Engineer

San Francisco, CA · On-site

$144K - $190K/yr

Senior Software Engineer Location: San Francisco, CA (required 5 days/week in-office) Type ... startup or top AI company (e.g., Stripe, Ramp, OpenAI, Anthropic) - Strong backend or full-stack ...

Ecovent

Senior Software Engineer

Boston, MA

$133K - $175K/yr

Description Ecovent is a Boston-based startup disrupting the HVAC and smart home industries with ... Our Senior Software Engineer role can jump into many technical areas, design and implement clean ...

WeTheHobby

Senior Software Engineer

Rochester, NY · On-site

$120 - $180/hr

... startup into a mature, event-driven enterprise. We are seeking a Senior Software Engineer to act as ... an architectural partner to the SVP of Engineering. Your mission is to help define the blueprint ...

Tensec

Sr Software Engineer

Nashville, TN · On-site

$100 - $130/hr

About Barn2Door is a high growth food+tech startup with offices in Seattle, WA and Nashville, TN ... Overview As a Senior Software Engineer, you are expected to provide critical thinking, a high ...

Barn2Door

Sr Software Engineer

Nashville, TN · On-site +1

$118K - $156K/yr

About Barn2Door is a high growth food+tech startup with offices in Seattle, WA and Nashville, TN ... Overview As a Senior Software Engineer, you are expected to provide critical thinking, a high ...

Barn2Door

Sr Software Engineer

Nashville, TN · On-site +1

$118K - $156K/yr

About Barn2Door is a high growth food+tech startup with offices in Seattle, WA and Nashville, TN ... Overview As a Senior Software Engineer, you are expected to provide critical thinking, a high ...

Prevail Recruiting

Senior Software Engineer

Washington, DC · Remote

$138K - $182K/yr

Position Summary The Senior Software Engineer will contribute across the full technology stack ... Prior experience in startup or high-growth technology environments * Exposure to AI-assisted ...

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Senior Software Engineer Startup information

See salary details

$75.5K

$143.3K

$192K

How much do senior software engineer startup jobs pay per year?

As of Sep 2, 2026, the average yearly pay for senior software engineer startup in the United States is $143,292.00, according to ZipRecruiter salary data. Most workers in this role earn between $122,500.00 and $161,500.00 per year, depending on experience, location, and employer.

What does a senior software engineer do at a startup?

A Senior Software Engineer at a startup is responsible for designing, developing, and maintaining the core software products or services. They often take on a broad range of tasks, including coding, code reviews, system architecture, and mentoring junior team members. In a startup environment, they may also contribute to product decisions, help set technical direction, and quickly adapt to changing priorities. Their role is critical in building scalable, reliable solutions while fostering innovation and collaboration within a small, fast-paced team.

What are some unique challenges senior software engineers face when working at a startup compared to a larger company?

Senior Software Engineers at startups often navigate a fast-paced, rapidly changing environment where priorities can shift quickly. Unlike at larger organizations with established processes and specialized teams, startup engineers may wear multiple hats, handling everything from architecture decisions to hands-on coding and even DevOps tasks. This role typically requires a high degree of autonomy and the ability to make impactful technical decisions with limited resources. The collaborative nature means frequent interaction with product managers, designers, and often even company leadership, creating opportunities for broad influence but also demanding strong communication and adaptability.

What are the key skills and qualifications needed to thrive as a senior software engineer at a startup, and why are they important?

To thrive as a Senior Software Engineer at a startup, you need advanced programming abilities, architectural design experience, and a solid understanding of software development lifecycles, typically backed by a bachelor's degree in computer science or a related field. Familiarity with modern frameworks, cloud platforms (like AWS or Azure), version control systems (such as Git), and agile methodologies is essential, with certifications in relevant technologies being advantageous. Strong problem-solving, adaptability, and effective communication skills help you navigate the dynamic startup environment and mentor junior team members. These skills are crucial to rapidly building scalable solutions, driving innovation, and supporting business growth in a fast-paced and often ambiguous setting.

What is the difference between Senior Software Engineer Startup vs Software Engineer Startup?

AspectSenior Software Engineer StartupSoftware Engineer Startup
Required CredentialsBachelor's/Master's in CS or related field, 3+ years experienceBachelor's in CS or related field, 0-2 years experience
Work EnvironmentFast-paced startup, leadership responsibilities, mentorshipCollaborative team, learning-focused, entry-level to mid-level tasks
Employer & Industry UsageTech startups, scale-ups, innovative projectsEarly-stage startups, product development teams
Common Search & ComparisonHigher responsibility, technical expertise, leadershipLearning opportunities, foundational skills, growth potential

The main difference between a Senior Software Engineer Startup and a Software Engineer Startup lies in experience, responsibilities, and leadership. Senior Software Engineers typically have more experience, take on mentorship roles, and handle complex projects, while Software Engineers are often in entry to mid-level positions focused on skill development and supporting team tasks.

How much does a senior software engineer startup make?

A senior software engineer at a startup typically earns between $100,000 and $160,000 annually, depending on location, experience, and company size. Compensation may also include stock options or equity, especially in early-stage startups, and often requires proficiency in programming languages like Python, Java, or JavaScript.

Is there a shortage of senior software engineers?

There is a high demand for senior software engineers across many industries due to the ongoing need for advanced technical skills, experience with programming languages like Java, Python, and cloud platforms, and leadership abilities. This demand often results in competitive salaries and opportunities, especially for those with strong problem-solving skills and experience in fast-paced startup environments.
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The most popular types of Software Engineer Startup jobs are:

What states have the most Senior Software Engineer Startup jobs?

States with the most job openings for Senior Software Engineer Startup jobs include:

What job categories do people searching Senior Software Engineer Startup jobs look for?

The top searched job categories for Senior Software Engineer Startup jobs are:

Senior Software Engineer Startup jobs near you
Infographic showing various Senior Software Engineer Startup job openings in the United States as of August 2026, with employment types broken down into 89% Full Time, 8% Part Time, and 3% Contract. Highlights an 88% Physical, 3% Hybrid, and 9% Remote job distribution, with an average salary of $143,292 per year, or $68.9 per hour.

Senior Software Engineer

Permute AI, Inc

Chicago, IL • On-site

$180K - $280K/yr

Full-time

Posted 5 days ago

Job description

Senior Software Engineer - AI Systems
Employment Type: Full-time
Company: Permute (www.permute.ai)
Overview
Permute is seeking a Senior Software Engineer to design, build, and deploy production-grade AI systems in a fast-moving startup environment. This role is for builders who move quickly, think clearly in ambiguous situations, and take ownership of turning ideas into working systems.
We care as much about how you think and build as we do about your background. The ideal candidate is someone who can reason through new problems, prototype rapidly, and ship reliable systems in a fast-moving startup environment.
Responsibilities
  • Design and implement production AI systems and agent architectures end-to-end
  • Build and maintain LLM-powered agents and tool-integration pipelines
  • Develop infrastructure for model evaluation, benchmarking, and monitoring
  • Collaborate with product, research, and engineering teams to deliver AI features
  • Prototype and productionize new approaches in reinforcement learning and agent orchestration
  • Optimize system reliability, performance, and scalability in deployed environments
  • Operate effectively in ambiguous, rapidly evolving startup environments

Required Qualifications
  • Strong background in software engineering and system design
  • Solid foundation in algorithms, statistics, and optimization
  • Experience building AI agents, LLM systems, or ML-driven products
  • 5+ years building in/around AWS infrastructure

Preferred Background
  • Degree in Mathematics, Physics, Computer Science, or a related technical field
  • Experience with:
    • Production Applications end-to-end
    • Agent orchestration frameworks
    • Model evaluation frameworks and benchmarking
    • Safety, monitoring, and reliability for deployed ML systems

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