New

Senior Software Engineer

Seattle, Washington, United States

Join one of the world's fastest growing fintech startups! We're looking for smart, motivated team members who want to change the way people pay their bills, helping them to improve their financial success.

Full Title: Senior Software Engineer, Platform

Location

Bellevue, WA. This role offers the flexibility to primarily work remotely, with team members typically going into the office 1-2 times per month for collaborative activities such as team design sessions and company events.

Role Overview

You will be instrumental in designing, developing, and operating the critical backend services and APIs that power our innovative bill pay platform. Working in a dynamic startup environment, you'll leverage your expertise to build scalable, resilient, and secure systems. This role requires a blend of strong technical leadership, hands-on development, and a commitment to operational excellence, as you contribute to the core infrastructure that drives our company's success.

About You

You're more than just a developer; you're a pragmatic and driven engineer who thrives on building impactful solutions in a fast-paced environment. You understand that in a startup, especially in the fintech space, balancing thoughtful execution with speed is paramount. You're excited by the prospect of shaping products that handle significant financial transactions and directly contribute to our company's success.

We'd love to hear from you if:

  • You're a Pragmatic Problem-Solver: You have a strong bias for action and excel at finding the right balance between high-quality engineering and rapid delivery. You're intentionally curious, critically assess business goals against technical effort, and won't hesitate to propose thoughtful trade-offs – like how cutting 5% of scope might save 50% of effort – to help us make the right calls.
  • You Seek to Understand the "Why": You're naturally curious about our business, the fintech landscape, and specifically the bill pay industry. You strive to understand the company's goals because you know it helps you build more effective and targeted solutions.
  • You Take Ownership of Quality and Security: You see features through from idea to operation, taking deep accountability for their success, reliability, and security. Given that we handle financial transactions, you have an ingrained commitment to software craftsmanship and proactively build robust, secure, and scalable systems.
  • You're a Collaborative Force: You believe that the best outcomes are achieved through teamwork. You're an excellent communicator, actively share your knowledge, prioritize team goals, and enjoy mentoring fellow engineers, helping to elevate the entire team's capabilities.
  • You Drive Continuous Improvement: You possess a strong desire to learn and grow, constantly seeking ways to improve not only your own skills but also our team's processes, codebase, and overall engineering culture.
  • You're Resilient and Adaptable: You navigate ambiguity with confidence and view unexpected challenges or shifting priorities as opportunities to learn and innovate. You're comfortable making architectural decisions that support both immediate needs and long-term scalability.

Responsibilities

System Design & Architecture:

  • Contribute to the design of scalable, resilient, and maintainable backend services and APIs.
  • Evaluate and recommend technologies, tools, and patterns to improve system performance and developer productivity.
  • Participate in architectural reviews and contribute to the long-term technical vision of the platform.

Development & Implementation:

  • Develop, test, and deploy robust backend features and services using Ruby on Rails.
  • Design, implement, and secure performant RESTful APIs, ensuring consistency and usability.

Write clean, efficient, well-documented, and well-tested code.Operations & Infrastructure:

  • Own the full lifecycle of your services, from design and development to deployment and operation (“you build it, you run it”).
  • Participate in a shared on-call rotation schedule to respond to and resolve critical production issues outside of standard business hours.
  • Contribute to improving CI/CD pipelines and overall operational excellence.

Collaboration & Process:

  • Collaborate effectively with product managers, engineers, and other stakeholders to determine requirements and deliver solutions.
  • Stay current with industry trends and advancements in backend development and cloud technologies.
  • Participate in thorough and constructive code reviews, both providing and incorporating feedback to ensure high-quality software development.

Qualifications

  • Bachelor's degree in Computer Science or a related field (or equivalent practical experience).
  • 5+ years of experience designing, developing, and implementing complex software systems, particularly high-traffic web applications.
  • Experience with backend development using Ruby on Rails or similar modern MVC web frameworks and object-oriented programming languages (e.g., Python/Django, PHP/Laravel, Node.js/Express).
  • Experience with designing, building, and consuming RESTful APIs.
  • Experience with cloud computing platforms (e.g., AWS, GCP, Azure).
  • Experience with containerization using Docker and orchestration with Kubernetes.
  • Experience with relational databases (e.g., PostgreSQL, MySQL).
  • Proficiency with Git (including branching strategies and collaborative workflows) and continuous delivery practices.
  • Experience building and maintaining background jobs (e.g., Sidekiq, Delayed Job, SQS).

Preferred Qualifications

  • Experience working in a fast-paced startup environment.
  • Experience within the Fintech industry.
  • Experience with monitoring and logging tools (e.g., Datadog).
  • Solid understanding of microservices architectures.
  • Experience with pub/sub messaging patterns and systems (e.g., RabbitMQ, Kafka, Redis Streams).

Who We Are

Each year U.S. households spend over $3.8 trillion - about one third of all consumer spending - on recurring bill payments. While staying on top of these bills is the single largest determinant for consumer financial health, organizing and paying them can be a time-consuming and frustrating chore. Since its inception, doxo has been on a mission to simplify and reduce the anxiety of staying on top of bills, empowering consumers to improve their financial health. Our company was founded on the simple idea that there should be an easy and more secure way for consumers to pay all of their bills through a single account, with any payment method, on any device. 

As consumers shift more bill payments online and to mobile, doxo continues to experience rapid growth. To date, over eight million doxo users across 97% of U.S. zip codes have paid bills through the payment network, across more than 45 different service categories. With more than 120,000 payable billers, doxo’s proprietary, crowd-sourced provider directory is the largest in the nation. 

doxo is consistently recognized as both an innovative company and a great place to work by the likes of Inc. Magazine, Deloitte, Comparably, and BuiltIn. Come join us as we grow the team to further accelerate growth, forever changing the bill pay landscape to focus on the customer.

Why We Are Different 

doxo is unique in that we have already found product/market fit and that our service is filling an important market need every day. But we are still small enough that every employee, no matter their position, can make a meaningful impact. Because transparency is a priority at all levels across the organization, we are all aware of how our work contributes to the success of our business as a whole. We are agile and work hard to solve difficult problems quickly. We work as a team to get things done and mentor individuals to get to the next level in their career.

Our Company Perks and Benefits:

  • 100% employer-paid medical, dental, and vision coverage for full-time employees
  • Generous equity grants
  • 401(k) match to help you save for your future
  • 15 days PTO to start, plus paid holidays
  • Charitable donation match
  • Pet insurance

Many Perks and Benefits only apply to Full Time Equivalent roles.

The annual base salary for this role is $130,000 - $180,000.  Starting pay will be based on several factors and commensurate with qualifications and experience.  Stock Options are also part of the compensation package for full time roles.

doxo is an equal-opportunity employer and we welcome applicants from all backgrounds.

doxo participates in the federal government’s E-Verify program, which confirms employment authorization of all newly hired employees through an electronic database maintained by the Social Security Administration and Department of Homeland Security. E-Verify is not used as a tool to pre-screen candidates. For up-to-date information on E-Verify, go to www.uscis.gov and click on 'E-Verify' located near the bottom of the page.

Apply for this job

*

indicates a required field

Resume/CV*

Accepted file types: pdf, doc, docx, txt, rtf

Cover Letter

Accepted file types: pdf, doc, docx, txt, rtf

Select...
Select...
Select...
Select...
Select...
Select...
Select...
Select...
Select...
Select...
Select...
Select...
Select...
Select...
Select...
Select...

Voluntary Self-Identification

For government reporting purposes, we ask candidates to respond to the below self-identification survey. Completion of the form is entirely voluntary. Whatever your decision, it will not be considered in the hiring process or thereafter. Any information that you do provide will be recorded and maintained in a confidential file.

As set forth in doxo’s Equal Employment Opportunity policy, we do not discriminate on the basis of any protected group status under any applicable law.

Select...
Select...
Race & Ethnicity Definitions

If you believe you belong to any of the categories of protected veterans listed below, please indicate by making the appropriate selection. As a government contractor subject to the Vietnam Era Veterans Readjustment Assistance Act (VEVRAA), we request this information in order to measure the effectiveness of the outreach and positive recruitment efforts we undertake pursuant to VEVRAA. Classification of protected categories is as follows:

A "disabled veteran" is one of the following: a veteran of the U.S. military, ground, naval or air service who is entitled to compensation (or who but for the receipt of military retired pay would be entitled to compensation) under laws administered by the Secretary of Veterans Affairs; or a person who was discharged or released from active duty because of a service-connected disability.

A "recently separated veteran" means any veteran during the three-year period beginning on the date of such veteran's discharge or release from active duty in the U.S. military, ground, naval, or air service.

An "active duty wartime or campaign badge veteran" means a veteran who served on active duty in the U.S. military, ground, naval or air service during a war, or in a campaign or expedition for which a campaign badge has been authorized under the laws administered by the Department of Defense.

An "Armed forces service medal veteran" means a veteran who, while serving on active duty in the U.S. military, ground, naval or air service, participated in a United States military operation for which an Armed Forces service medal was awarded pursuant to Executive Order 12985.

Select...

Voluntary Self-Identification of Disability

Form CC-305
Page 1 of 1
OMB Control Number 1250-0005
Expires 04/30/2026

Why are you being asked to complete this form?

We are a federal contractor or subcontractor. The law requires us to provide equal employment opportunity to qualified people with disabilities. We have a goal of having at least 7% of our workers as people with disabilities. The law says we must measure our progress towards this goal. To do this, we must ask applicants and employees if they have a disability or have ever had one. People can become disabled, so we need to ask this question at least every five years.

Completing this form is voluntary, and we hope that you will choose to do so. Your answer is confidential. No one who makes hiring decisions will see it. Your decision to complete the form and your answer will not harm you in any way. If you want to learn more about the law or this form, visit the U.S. Department of Labor’s Office of Federal Contract Compliance Programs (OFCCP) website at www.dol.gov/ofccp.

How do you know if you have a disability?

A disability is a condition that substantially limits one or more of your “major life activities.” If you have or have ever had such a condition, you are a person with a disability. Disabilities include, but are not limited to:

  • Alcohol or other substance use disorder (not currently using drugs illegally)
  • Autoimmune disorder, for example, lupus, fibromyalgia, rheumatoid arthritis, HIV/AIDS
  • Blind or low vision
  • Cancer (past or present)
  • Cardiovascular or heart disease
  • Celiac disease
  • Cerebral palsy
  • Deaf or serious difficulty hearing
  • Diabetes
  • Disfigurement, for example, disfigurement caused by burns, wounds, accidents, or congenital disorders
  • Epilepsy or other seizure disorder
  • Gastrointestinal disorders, for example, Crohn's Disease, irritable bowel syndrome
  • Intellectual or developmental disability
  • Mental health conditions, for example, depression, bipolar disorder, anxiety disorder, schizophrenia, PTSD
  • Missing limbs or partially missing limbs
  • Mobility impairment, benefiting from the use of a wheelchair, scooter, walker, leg brace(s) and/or other supports
  • Nervous system condition, for example, migraine headaches, Parkinson’s disease, multiple sclerosis (MS)
  • Neurodivergence, for example, attention-deficit/hyperactivity disorder (ADHD), autism spectrum disorder, dyslexia, dyspraxia, other learning disabilities
  • Partial or complete paralysis (any cause)
  • Pulmonary or respiratory conditions, for example, tuberculosis, asthma, emphysema
  • Short stature (dwarfism)
  • Traumatic brain injury
Select...

PUBLIC BURDEN STATEMENT: According to the Paperwork Reduction Act of 1995 no persons are required to respond to a collection of information unless such collection displays a valid OMB control number. This survey should take about 5 minutes to complete.