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back end engineer

Pylon

<div>About Pylon
America&rsquo;s $13T mortgage market is one of the most important financial systems in the world. It underwrites the middle class and is the mechanism through which millions of families build wealth. But while every other financial instrument has been simplified to an API call, mortgages are still assembled by hand.
We started from zero and created the first vertically integrated mortgage platform that turns origination into a single API.
Publicly traded companies and the country&rsquo;s largest originators are already building on Pylon. Revenue is compounding monthly. We&rsquo;re backed by Peter Thiel, Conversion Capital, QED, Citi, Fifth Wall, and the founders of Ramp, Blend, and Mercury.
Working at Pylon isn&rsquo;t for those seeking comfort. The people who thrive here have high agency, strong opinions, and a track record of delivering outcomes without direction. Many of us are former founders. We move quickly, challenge each other directly, and take full ownership of results. It&rsquo;s hard work, but it will be worth it.
Join us in building America&rsquo;s mortgage rails.<h2 class="jobSectionHeader">
The Team</h2>
We're looking for Back End Engineers to join our Integrations team. This team connects Pylon to the outside world &mdash; the partners, services, and data sources that make a seamless mortgage experience possible.
We have a critical, multi-month project ahead: building out a ton of integrations. Credit bureaus, title companies, insurance providers, document services &mdash; mortgage touches everything, and we need to plug into all of it. This is a rare opportunity to work across the entire mortgage domain and understand how all the pieces fit together, fast.<h2 class="jobSectionHeader">
Here Is What You'll Do</h2><ul><li>
Build integrations across the mortgage ecosystem. You'll connect Pylon to external partners &mdash; each with their own APIs, data formats, quirks, and reliability characteristics. No two are the same.</li><li>
Work on everything. This role touches every part of the mortgage process. You'll gain a comprehensive understanding of how mortgage works &mdash; not in theory, but by building the connective tissue that makes it function.</li><li>
Own solutions from development to deploy to maintenance. You build it, you ship it, you keep it running. Integrations are only as good as their uptime, and that's your responsibility.</li><li>
Be self-directed and versatile. The integrations surface is wide. You'll need to context-switch between partners, prioritize what matters, and drive projects forward without waiting for someone to hand you the next task.</li><li>
Move fast on a high-impact project. This isn't a &quot;someday&quot; initiative. We're building these integrations now, and each one we ship unlocks new capabilities for our customers.</li></ul><h2 class="jobSectionHeader">
Tech Stack</h2><ul><li>
TypeScript</li><li>
NestJS + GraphQL</li><li>
SQL (PostgreSQL)</li><li>
Temporal.io (workflow orchestration)</li><li>
External partner APIs (REST, SOAP, file-based &mdash; the full spectrum)</li><li>
AI-driven development tooling and agentic infrastructure</li></ul><h2 class="jobSectionHeader">
Who Will Succeed Here</h2>
Someone who:<ul><li>
Is deeply curious</li><li>
Wants to won features from design to development to deployment to maintence</li><li>
Is willing to put the work in to solve the hardest of problems</li></ul>
Location: Palo Alto , CA Base Salary Range: $140,000/yr to $220,000/yr + Equity + Benefits
Compensation Range: $140K - $220K</div>

Backend Engineer, Integrations

Distyl

<div>
 
 About Distyl AI
 
 
 
 Distyl is an applied AI technology company partnering with the world&rsquo;s most ambitious institutions to rearchitect critical operations for the frontier of AI. Our customers include the largest companies in telecom, healthcare, insurance, manufacturing, consumer goods, and global social organizations.
 
 
 We research and deploy technologies that power AI-native operations &mdash; both for our partners and for Distyl itself. Our work spans research into self-constructing systems, the development of the most reliable execution of AI systems, and products that transform mission-critical workflows. As a result, Distyl's technologies affect some of the world's largest operations &mdash; from hundreds of millions of consumer interactions to tens of millions of supply chain transactions and millions of patient journeys.
 
 
 Distyl is backed by leading investors including Lightspeed Venture Partners, Khosla Ventures, Coatue, DST Global, and the board-members of 20+ F500s. The results reflect this approach: a 100% production deployment success rate for our customers and one of the few enterprise AI companies to run a profitable business.
 
 
 
 What We Are Looking For
 
 
 
 As a Software Engineer Back End you will help design, build, and optimize Distillery&mdash;our AI-native platform that powers real-world enterprise AI systems for diverse F500 workflows.
 
 
 Your role will involve developing scalable AI infrastructure, ensuring system reliability, and collaborating with engineers and business leaders to solve some of the most complex AI deployment challenges.
 
 
 
 Key Responsibilities
 
 
 
 <ul>
 <li>
 Build &amp; Scale AI-Native Infrastructure: Develop and refine a platform where AI builds, optimizes, and operates AI-powered workflows. Define how AI automation integrates into traditional enterprise infrastructure.
 </li>
 <li>
 Develop Cloud-Native Microservices &amp; Scalable AI Systems: Design and build secure, high-performance backend services deployed across AWS/GCP/Azure or on-prem Kubernetes environments. Build using Python, FastAPI, SQLAlchemy, Alembic, and modern DevOps tools to develop scalable, reliable AI infrastructure.
 </li>
 <li>
 Optimize System Performance &amp; Reliability: Ensure high-availability, security, and observability of AI-native workflows. Implement best practices for ML/AI Ops, distributed computing, and scalable service orchestration.
 </li>
 <li>
 Collaborate with Cross-Functional Teams: Partner with Forward-Deployed Engineers (FDEs), AI Researchers, and business SMEs to translate real-world operational needs into platform capabilities. Advocate for strong software engineering and DevOps practices, driving high coding standards and scalable architectures.
 
 
 </li>
 </ul>
 
 Who You Are
 
 
 
 <ul>
 <li>
 We are hiring multiple roles across different levels of seniority (3-10+ years of software engineering experience)
 </li>
 <li>
 Proficiency in Backend &amp; Systems Engineering. Expertise in Python, Java, Golang, or C++ for building scalable, high-performance systems
 </li>
 <li>
 Hands-on experience with Kubernetes, CI/CD, cloud platforms (AWS, GCP, or Azure), and infrastructure as code
 </li>
 <li>
 Strong interest in AI-native development, leveraging tools like ChatGPT, Claude, Perplexity, and Cursor in engineering workflows
 </li>
 <li>
 Experience with security, distributed systems, storage, ML/AI Ops, and large-scale observability is a plus
 </li>
 <li>
 Travel: Ability to travel 10-20%
 
 
 </li>
 </ul>
 
 What We Offer
 
 
 
 <ul>
 <li>
 The base salary range for this role is $150K &ndash; $250K, depending on experience, location, and level. In addition to base compensation, this role is eligible for meaningful equity, along with a comprehensive benefits package
 </li>
 <li>
 100% covered medical, dental, and vision for employees and dependents
 </li>
 <li>
 401(k) with additional perks (e.g., commuter benefits, in‑office lunch)
 </li>
 <li>
 Access to state‑of‑the‑art models, generous usage of modern AI tools, and real‑world business problems
 </li>
 <li>
 Ownership of high‑impact projects across top enterprises
 </li>
 <li>
 A mission‑driven, fast‑moving culture that prizes curiosity, pragmatism, and excellence
 
 
 </li>
 </ul>
 Distyl has offices in San Francisco and New York. This role follows a hybrid collaboration model with 3+ days per week (Tuesday&ndash;Thursday) in‑office.
 
 
 
 
 We&rsquo;re grateful for the strong interest in this role. The best way to get your profile in front of our team is to apply directly through our careers page, where all applications are reviewed. Due to the high volume of interest, we&rsquo;re not able to review or respond to all direct emails or LinkedIn messages. We will be in touch with every applicant once we&rsquo;ve completed our review, regardless of the decision.
 
 
</div>

Software Engineer - Back End

<div>About Pylon
America&rsquo;s $13T mortgage market is one of the most important financial systems in the world. It underwrites the middle class and is the mechanism through which millions of families build wealth. But while every other financial instrument has been simplified to an API call, mortgages are still assembled by hand.
We started from zero and created the first vertically integrated mortgage platform that turns origination into a single API.
Publicly traded companies and the country&rsquo;s largest originators are already building on Pylon. Revenue is compounding monthly. We&rsquo;re backed by Peter Thiel, Conversion Capital, QED, Citi, Fifth Wall, and the founders of Ramp, Blend, and Mercury.
Working at Pylon isn&rsquo;t for those seeking comfort. The people who thrive here have high agency, strong opinions, and a track record of delivering outcomes without direction. Many of us are former founders. We move quickly, challenge each other directly, and take full ownership of results. It&rsquo;s hard work, but it will be worth it.
Join us in building America&rsquo;s mortgage rails.<h2 class="jobSectionHeader">
The Team</h2>
We're looking for Back End Engineers to join our API team. We treat our GraphQL API as a product &mdash; because it is one. Multiple customers build directly on top of it, and the quality of their experience is determined by how well we design, document, and maintain it.
Mortgage is a surprisingly rich domain to model. It's path-dependent: the choices you make early in a loan constrain what's possible later. It's nonlinear: different borrower situations branch into wildly different flows. Most APIs in this space paper over that complexity. We're building one that embraces it &mdash; encoding the real shape of mortgage into a surface that's impossible to misuse and delightful to build against.<h2 class="jobSectionHeader">
Here Is What You'll Do</h2><ul><li>
Define what a mortgage is in code. Seriously. You'll work on semantic models that don't just represent mortgages as they exist today &mdash; they expand what a mortgage can be. This is product design at the API layer.</li><li>
Build toward an event-driven API. We're moving to a world where our API doesn't just respond to requests &mdash; it tells you what happened, why, and what you can do next. You'll help design and ship that future.</li><li>
Make the complex feel simple. Our API should make the mortgage process impossible to get wrong. That means thoughtful abstractions, clear documentation, and an obsessive focus on developer experience.</li><li>
Design for nonlinearity. Mortgage flows aren't linear wizards. Our future API encodes choice, branching, and path-dependence natively. You'll work on guided experiences that model real-world complexity without exposing it as chaos.</li><li>
Treat this as a product surface. You'll think about breaking changes, versioning, onboarding, and the full lifecycle of an API that real companies depend on.</li></ul><h2 class="jobSectionHeader">
Tech Stack</h2><ul><li>
TypeScript</li><li>
GraphQL (this is the product)</li><li>
NestJS</li><li>
SQL (PostgreSQL)</li><li>
Temporal.io (workflow orchestration)</li><li>
Event-driven architecture</li><li>
AI-driven development tooling and agentic infrastructure</li></ul><h2 class="jobSectionHeader">
Who Will Succeed Here</h2>
Someone who:<ul><li>
Is deeply curious</li><li>
Wants to won features from design to development to deployment to maintence</li><li>
Is willing to put the work in to solve the hardest of problems</li></ul>
Location: Palo Alto , CA Base Salary Range: $140,000/yr to $220,000/yr + Equity + Benefits
Compensation Range: $130K - $220K</div>

Backend Engineer, API

<div>About Pylon
America&rsquo;s $13T mortgage market is one of the most important financial systems in the world. It underwrites the middle class and is the mechanism through which millions of families build wealth. But while every other financial instrument has been simplified to an API call, mortgages are still assembled by hand.
We started from zero and created the first vertically integrated mortgage platform that turns origination into a single API.
Publicly traded companies and the country&rsquo;s largest originators are already building on Pylon. Revenue is compounding monthly. We&rsquo;re backed by Peter Thiel, Conversion Capital, QED, Citi, Fifth Wall, and the founders of Ramp, Blend, and Mercury.
Working at Pylon isn&rsquo;t for those seeking comfort. The people who thrive here have high agency, strong opinions, and a track record of delivering outcomes without direction. Many of us are former founders. We move quickly, challenge each other directly, and take full ownership of results. It&rsquo;s hard work, but it will be worth it.
Join us in building America&rsquo;s mortgage rails.<h2 class="jobSectionHeader">
The Team</h2>
We're looking for Back End Engineers to join our Underwriting team. This is the team that takes human judgment out of mortgage origination &mdash; and replaces it with systems that are faster, more consistent, and more accurate than any human process could be.
Mortgage underwriting today is mostly manual. Experts read guidelines, interpret rules, cross-reference documents, and make decisions that determine whether someone gets a home. We're encoding all of that into software. Nobody has fully cracked this yet. The companies that figure it out will define the next generation of lending.
The stakes are real. An incorrectly modeled rule can cost the company tens of thousands of dollars on a single loan. A well-modeled system can help us outcompete everyone in the market.<h2 class="jobSectionHeader">
Here Is What You'll Do</h2><ul><li>
Encode natural language rules into code. You'll work with DSLs and novel techniques &mdash; including AI &mdash; to translate dense regulatory guidelines into executable logic. Think of it as compiling English into a system that makes six-figure decisions.</li><li>
Work side-by-side with mortgage experts. You won't be guessing what the rules mean. You'll pair with people who've spent their careers in mortgage to understand nuance, exceptions, and the &quot;it depends&quot; that makes this domain so hard.</li><li>
Build systems where correctness is everything. This isn't a domain where &quot;close enough&quot; works. You'll design for precision, build robust test coverage, and think deeply about failure modes.</li><li>
Push into uncharted territory. We're applying AI in ways the mortgage industry hasn't seen. You'll help define what's possible &mdash; not just implement what's been done before.</li><li>
Automate complex, regulated processes. Every rule you encode is a step toward a world where mortgages are faster, cheaper, and more accessible.</li></ul><h2 class="jobSectionHeader">
Tech Stack</h2><ul><li>
TypeScript</li><li>
Custom DSLs for rule encoding</li><li>
AI/ML tooling and agentic infrastructure</li><li>
NestJS + GraphQL</li><li>
SQL (PostgreSQL)</li><li>
Temporal.io (workflow orchestration)</li></ul><h2 class="jobSectionHeader">
Who Will Succeed Here</h2>
Someone who:<ul><li>
Is deeply curious</li><li>
Wants to won features from design to development to deployment to maintence</li><li>
Is willing to put the work in to solve the hardest of problems</li></ul>
Location: Palo Alto , CA Base Salary Range: $140,000/yr to $220,000/yr + Equity + Benefits
Compensation Range: $130K - $220K</div>

Backend Engineer, Underwriting

Plaid

<div>
 We believe that the way people interact with their finances will drastically improve in the next few years. We&rsquo;re dedicated to empowering this transformation by building the tools and experiences that thousands of developers use to create their own products. Plaid powers the tools millions of people rely on to live a healthier financial life. We work with thousands of companies like Venmo, SoFi, several of the Fortune 500, and many of the largest banks to make it easy for people to connect their financial accounts to the apps and services they want to use. Plaid&rsquo;s network covers 12,000 financial institutions across the US, Canada, UK and Europe. Founded in 2013, the company is headquartered in San Francisco with offices in New York, Washington D.C., London and Amsterdam.
 
 
 Plaid&rsquo;s mission is to unlock financial freedom for everyone by making money movement and access to financial data simple and secure. As a Software Engineer, you will design and build the systems that power how millions of people connect to their finances. You will work across the stack, from reliable backend services and APIs to intuitive applications that bring those systems to life. You will collaborate with engineers, product managers, and designers to ship products that make financial services more accessible and transparent. At Plaid, engineers take ownership early, grow quickly, and see their work reach millions of users.
 
 
 
 Responsibilities
 
 
 
 <ul>
 <li>
 System Design &amp; Development: Build and maintain scalable, reliable backend or fullstack systems and APIs that power Plaid&rsquo;s products.
 </li>
 <li>
 Collaboration: Work closely with product managers, designers, and other engineers to define and deliver features that solve real customer problems.
 </li>
 <li>
 Code Quality: Write clean, efficient, and well-tested code. Participate in reviews to maintain high engineering standards.
 </li>
 <li>
 Testing &amp; Debugging: Build automated tests, monitor system performance, and troubleshoot issues in production environments.
 </li>
 <li>
 Continuous Improvement: Contribute to technical design discussions, share best practices, and help improve how we build at Plaid.
 
 
 </li>
 </ul>
 
 Qualifications
 
 
 
 <ul>
 <li>
 1-4 years of software engineering experience (post-internship)
 </li>
 <li>
 Proven ability to ship reliable systems or features at scale
 </li>
 <li>
 Strong problem-solving skills. You turn ideas into practical, maintainable solutions.
 </li>
 <li>
 High ownership. You are excited to roll up your sleeves and figure things out that don&rsquo;t have precedent at Plaid.
 </li>
 <li>
 Collaborative mindset. You thrive in a fast-paced environment and enjoy working with others to deliver results.
 </li>
 <li>
 Growth oriented. You seek feedback, learn quickly, and take pride in improving your craft.
 
 
 </li>
 </ul>
 $176,400 - $243,600 a year
 
 
 The target base salary for this position ranges from $176,400/year to $243,600/year in Zone 1. The target base salary will vary based on the job's location.
 
 
 
 Our Geographic Zones Are As Follows
 
 
 
 Zone 1 - San Francisco / New York City / Seattle
 
 
 Zone 2 - Los Angeles / Washington DC / Austin / Boston / Sacramento / San Diego
 
 
 Zone 3 - Atlanta / Portland / Chicago / Philadelphia / Denver / Miami / Dallas / Raleigh
 
 
 Zone 4 - All other US cities
 
 
 The base salary range listed for this full-time position excludes commission (if applicable), equity and benefits. The pay range shown on each job posting is the minimum and maximum target for new-hire salaries. Actual pay may be higher or lower depending on factors like skills, experience, and relevant education or training.
 
 
 Our mission at Plaid is to unlock financial freedom for everyone. To support that mission, we seek to build a diverse team of driven individuals who care deeply about making the financial ecosystem more equitable. We recognize that strong qualifications can come from both prior work experiences and lived experiences. We encourage you to apply to a role even if your experience doesn't fully match the job description. We are always looking for team members that will bring something unique to Plaid!
 
 
 Plaid is proud to be an equal opportunity employer and values diversity at our company. We do not discriminate based on race, color, national origin, ethnicity, religion or religious belief, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender, gender identity, gender expression, transgender status, sexual stereotypes, age, military or veteran status, disability, or other applicable legally protected characteristics. We also consider qualified applicants with criminal histories, consistent with applicable federal, state, and local laws. Plaid is committed to providing reasonable accommodations for candidates with disabilities in our recruiting process. If you need any assistance with your application or interviews due to a disability, please let us know at [email protected] .
 
 
 Please review our Candidate Privacy Notice here .
</div>

Software Engineer

Profound

<div>
 Profound is on a mission to help companies understand and control their AI presence. As a Software Engineer, you will architect and build high-performance applications that power AI-driven insights. You will work across the stack, from crafting sleek front-end experiences to optimizing back-end infrastructure, ensuring speed, scalability, and impact.
 
 
 
 What You&rsquo;ll Do
 
 
 
 <ul>
 <li>
 Build and ship full-stack applications that help companies analyze and control their AI presence
 </li>
 <li>
 Develop and refine high-quality front-end interfaces using React and TypeScript
 </li>
 <li>
 Design and optimize back-end systems for performance, security, and scalability
 </li>
 <li>
 Work closely with design and product to translate ideas into production-ready experiences
 </li>
 <li>
 Own key technical decisions, ensuring maintainability and long-term impact
 
 
 </li>
 </ul>
 
 Who You Are
 
 
 
 <ul>
 <li>
 A strong portfolio or GitHub showcasing full-stack development expertise, with proficiency in React, TypeScript, Node.js, and modern front-end and back-end frameworks
 </li>
 <li>
 Experience designing and working with scalable databases and APIs
 </li>
 <li>
 Deep understanding of performance optimization, security, and best practices
 </li>
 <li>
 Comfortable in a fast-moving, high-performance startup environment
 
 
 </li>
 </ul>
 
 Location
 
 
 
 This is an on-site role based in our NYC or SF office, designed for builders who thrive on speed, iteration, and meaningful impact.
 
 
 For this role, the expected base salary range is $120,000 to $170,000 (NYC and SF). Comp can vary by location. Profound&rsquo;s total compensation package is designed to be competitive and includes base salary, equity, and a full range of benefits and perks. Final compensation will depend on factors such as your skills, experience, qualifications, and location, and will be determined during the interview process. Our recruiting team will share more details about the full compensation package and benefits as you move through hiring.
 
 
</div>

Software Engineer, New Grad

Love Freedom Solution

<div>
 
 Full Stack Software Engineer (1&ndash;3 YOE) | AI Startup | Onsite &ndash; San Francisco
 
 
 About the Opportunity
 
 
 
 Lovefreedom Solution has the luxury to work with a
 
 high-growth, VC-backed startup
 
 building infrastructure for next-generation AI systems. This company works directly with leading AI labs and is scaling rapidly following strong early traction.
 
 
 They are hiring a
 
 Full Stack Software Engineer (1&ndash;3 years experience)
 
 to help build core product and infrastructure systems used at scale.
 
 
 This is a
 
 high-ownership, hands-on engineering role
 
 with direct exposure to cutting-edge AI workflows.
 
 
 
 Key Responsibilities
 
 
 
 <ul>
 <li>
 Build and ship full-stack applications end-to-end
 </li>
 <li>
 Develop frontend systems using Next.js / React
 </li>
 <li>
 Contribute to backend services using Node.js or Python
 </li>
 <li>
 Work with Kubernetes-based infrastructure
 </li>
 <li>
 Design scalable systems supporting high-volume user workflows
 </li>
 <li>
 Partner with internal teams and stakeholders in a client-facing capacity
 
 
 </li>
 </ul>
 
 Required Qualifications (Non-Negotiable)
 
 
 
 <ul>
 <li>
 1&ndash;3 years of experience as a Full Stack Engineer
 </li>
 <li>
 Experience at:
 </li>
 <ul>
 <li>
 High-growth VC-backed startup, OR
 </li>
 <li>
 Top trading firm, OR
 </li>
 <li>
 Founding engineer at startup that raised $2.5M+
 
 </li>
 </ul>
 </ul>
 
 Technical Requirements
 
 
 
 <ul>
 <li>
 Strong full-stack experience:
 </li>
 <ul>
 <li>
 Frontend: React, Next.js
 </li>
 <li>
 Backend: Node.js or Python
 </li>
 </ul>
 <li>
 Kubernetes (required)
 </li>
 <li>
 Experience with Kafka, Redis, or Elasticsearch is a plus
 
 </li>
 </ul>
 
 What We&rsquo;re Looking For
 
 
 
 <ul>
 <li>
 Proven ability to build products end-to-end
 </li>
 <li>
 Strong sense of ownership and execution
 </li>
 <li>
 Comfortable in a fast-paced, startup environment
 </li>
 <li>
 Strong communication skills (client-facing exposure required)
 
 
 </li>
 </ul>
 
 Work Environment
 
 
 
 <ul>
 <li>
 Onsite: San Francisco (FiDi) &ndash; 5 days/week
 </li>
 <li>
 Flexible working hours
 </li>
 <li>
 High-performance, fast-moving team
 
 
 </li>
 </ul>
 
 Compensation
 
 
 
 <ul>
 <li>
 $180K &ndash; $250K base
 </li>
 <li>
 Competitive equity package
 
 
 </li>
 </ul>
 
 Right to Represent
 
 
 
 By applying, you agree to be represented by
 
 Lovefreedom Solution
 
 for this opportunity.
 
 
 Skills: kubernetes,node.js,stack,infrastructure,software,react,san,high-growth,ownership,python
</div>

Explore 261+ Back end engineer in San Francisco this April. Find roles across top companies and apply now to boost your career.

261 back end engineer jobs In San Francisco

Backend Engineer, Integrations

Software Engineer - Back End

Backend Engineer, API

Backend Engineer, Underwriting

Software Engineer

Software Engineer, New Grad

Software Engineer