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Senior Software Engineer Startup Jobs (NOW HIRING)

TENEX.AI

Senior Software Engineer

$125K - $165K/yr

The Senior Software Engineer will take ownership of major product and infrastructure initiatives ... stage startup environment. • GCP certifications such as Professional Cloud Developer or ...

Clarasight

Senior Software Engineer

New York, NY · On-site

$134K - $176K/yr

You thrive in early-stage startup environments where speed, ownership, and adaptability are ... We are seeking a Senior Software Engineer to join our founding team. As one of our first ...

Clera

Senior Software Engineer

Manhattan, NY · On-site

$250 - $300/hr

About the Role A well-funded, Series B legaltech startup is looking for a Senior Software Engineer to join their growing engineering team in New York City. This company is redefining legal services ...

Breeze

Senior Software Engineer

Manhattan, NY · On-site

$134K - $177K/yr

Breeze is a dynamic startup backed by Sequoia Capital, focused on building a universal payment layer for seamless transactions. They are seeking a Senior Backend Software Engineer to take ownership ...

Theory Ventures

Senior Software Engineer

San Francisco, CA · On-site

$180 - $240/hr

Senior Software Engineer San Francisco Engineering Hybrid Full-time About BackOps AI BackOps AI is ... Startup DNA: Proven ability to thrive in early-stage environments comfortable with ambiguity, rapid ...

Socket.dev

Senior Software Engineer

Los Angeles, CA · On-site

$110 - $160/hr

Senior Software Engineer Disbo · Full-time · Los Angeles, California (On-site to start, then ... Clear communication and sound judgment on tradeoffs in a fast-moving startup * Bonus: fintech ...

Tokio Marine HCC

Senior Software Engineer

Warwick, RI · On-site

$104.60 - $157/hr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Senior Software Engineer**As the nation's original travel insurance comparison site, InsureMyTrip ... more typical of a startup culture. You'll have the ability to make an impact, influence key ...

Leonardo DRS

Senior Software Engineer

Germantown, MD · On-site

$107 - $145/hr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Senior Software Engineer Location: Germantown, MD, US, 20876 Job ID: 115048 DRS RADA Technologies ... startup-speed to enterprise-grade without sacrificing our ability to move quickly and adapt. Your ...

Architect.io

Senior Software Engineer

Boston, MA · Remote

$133K - $175K/yr

  • Medical

  • Dental

DevOps, standardized - write once, deploy everywhere Architect is a rapidly growing startup ... Software engineering @ Architect.io We are seeking a Senior Software Engineer to join our ...

Garner Health

Senior Software Engineer

New York, NY · On-site

$230K - $285K/yr

  • Medical

  • Dental

  • Vision

  • Retirement

  • PTO

We are seeking an exceptional Senior Software Engineer to join our Engineering team . Garner ... fast paced startup environment * Demonstrated ability to build complex systems using AI coding ...

Proven Software

$140K - $170K/yr

  • Medical

  • PTO

Join Proven as a Senior Software Engineer and experience the thrill of working in a dynamic, fully remote but fully engaged environment. You will be part of a passionate team dedicated to crafting ...

Beli

Senior Software Engineer

Manhattan, NY · On-site

$134K - $177K/yr

As a Senior Software Engineer, you will lead the research, design, implementation, and support of ... product features in a startup or high-growth environment • Highly skilled in Javascript ...

SW5 Consulting

Senior Software Engineer

New York, NY

$190K - $240K/yr

Senior Software Engineer New York, NY (Hybrid) · $190K to $240K + Equity About the company Our ... A track record at a Series A to C startup, or demonstrated high growth and promotion at a larger ...

Alumni Ventures

Senior Software Engineer

Andover, MA · On-site

$123K - $163K/yr

They are seeking a Senior Software Engineer to solve complex business problems through software ... of startup investments. Founded in 2014, the company is headquartered in Manchester, USA, with a ...

Whatnot

Senior Software Engineer

San Francisco, CA · On-site

$207K - $230K/yr

  • Medical

  • Dental

  • Vision

  • Retirement

We're one of the fastest growing marketplaces and were recently named the #1 Best Startup Employer ... Role We're hiring Senior Software Engineers across multiple engineering pillars at Whatnot ...

Whatnot

Senior Software Engineer

Los Angeles, CA · On-site

$140 - $210/hr

  • Medical

  • Dental

  • Vision

  • Retirement

We're one of the fastest growing marketplaces and were recently named the #1 Best Startup Employer ... Role We're hiring Senior Software Engineers across multiple engineering pillars at Whatnot ...

New

Whatnot

Senior Software Engineer

San Francisco, CA · On-site

$140 - $210/hr

  • Medical

  • Dental

  • Vision

  • Retirement

We're one of the fastest growing marketplaces and were recently named the #1 Best Startup Employer ... Role We're hiring Senior Software Engineers across multiple engineering pillars at Whatnot ...

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Senior Software Engineer Startup information

See salary details

$75.5K

$143.3K

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

As of Aug 13, 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 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.

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.
More about Senior Software Engineer Startup jobs
What cities are hiring for Senior Software Engineer Startup jobs? Cities with the most Senior Software Engineer Startup job openings:
What are the most commonly searched types of Software Engineer Startup jobs? 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 100% Full Time. Highlights an 57% In-person, and 43% Remote job distribution, with an average salary of $143,292 per year, or $68.9 per hour.

Senior Software Engineer

TENEX.AI

Remote

$125K - $165K/yr

Full-time

Re-posted 5 days ago

Job description

Job Summary:
TENEX.AI is an AI-native, automation-first Managed Detection and Response provider, focused on enhancing cybersecurity through advanced threat detection and rapid response. The Senior Software Engineer will take ownership of major product and infrastructure initiatives, working across the stack to build scalable, reliable, and secure systems while collaborating closely with product and design teams.
Responsibilities:
• Design, develop, and deploy scalable backend services and APIs.
• Build and maintain intuitive and performant frontend applications.
• Take ownership of projects end-to-end, from architecture through deployment and monitoring.
• Collaborate with product, design, and other engineers to define and implement new features.
• Write clean, maintainable, and testable code.
• Participate in design reviews and code reviews, raising the bar for engineering quality.
• Troubleshoot complex issues across the stack and ensure system reliability.
• Contribute to improving engineering processes, tools, and team practices.
• Stay current with emerging technologies and bring new ideas to the team.
Qualifications:
Required:
• 5+ years of professional software engineering experience.
• Strong understanding of software engineering principles and best practices.
• Proficiency in at least one backend language such as Go, Python, or equivalent.
• Experience with at least one modern frontend framework (React, Next.js, TypeScript, or similar).
• Strong experience with relational databases (PostgreSQL, MySQL, or equivalent).
• Familiarity with cloud platforms such as GCP or AWS.
• Proven ability to take ownership of complex projects and deliver them end-to-end.
• Excellent problem-solving, communication, and collaboration skills.
• Bachelor’s degree in Computer Science, Engineering, or a related field (or equivalent experience).
Preferred:
• Experience with containerization technologies like Docker and orchestration tools like Kubernetes.
• Experience with CI/CD pipelines.
• Exposure to AI/ML concepts and technologies, such as: Prompt Engineering, Retrieval-Augmented Generation (RAG), Supervised Fine-Tuning (SFT), Vector Databases.
• Experience working in an early-stage startup environment.
• GCP certifications such as Professional Cloud Developer or Professional Data Engineer are a plus.
Company:
TENEX.AI is a cybersecurity company that combines human expertise with artificial intelligence to protect digital assets. Founded in 2024, the company is headquartered in Sarasota, USA, with a team of 201-500 employees. The company is currently Growth Stage.

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