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Compensation: Competitive, commensurate with experience
About Topkey
Topkey is a rapidly-growing fintech platform for short-term rental managers. We offer deposit accounts, credit cards, full bill-pay, external cards, and expense management—all in one Rails monolith on the latest Ruby/Rails. With $1M+ ARR, zero churn (at the time of posting this), and a small, tight-knit engineering team, you’ll have a huge impact on our roadmap, our stack, and our customers’ success.
We’re backed by top-tier investors like Felicis Ventures, Andreessen Horowitz (a16z), and Y Combinator. Topkey is recognized as one of the top emerging vertical startups, and our trajectory is steep. We’re looking for driven individuals to join our team and help shape the future of financial infrastructure in the $110 billion hospitality market.
We’ve been featured in numerous media outlets, including Axios , Wall Street Journal , Fortune , Phocuswire , Short Term Rentalz , and Fintech Global .
What You'll Do
- Own features end-to-end in our Rails monolith (Rails 8+, Ruby 3.x)
- Build rich, reactive UIs with Hotwire/Turbo, Stimulus, and Tailwind CSS
- Integrate with external APIs (Plaid, Stripe, Unit, etc.) securely and robustly
- Use large context LLMs (Claude, Gemini, ChatGPT, etc.) to accelerate coding, QA, and spec writing
- Participate in architecture discussions -- help us evolve our beautiful monolith
- Work closely with product and founders to take specs from prototype to prod
- Ship daily/weekly, review critically, and treat AI as a multiplier—not a replacement for good judgment
- Optimize performance, reliability, and scalability of our core platform
- Act as your own pair programmer—debugging, prompting, reviewing AI-generated code for quality (the eng team will also review, but the initial onus is on the contributor)
You Have
- 5+ years building production-grade Rails applications
- Deep expertise in Ruby, Rails conventions, background jobs, and service objects in a growing monolith
- Confidence reviewing, prompting, and editing AI-generated code from tools like Claude, Devin, Gemini, Cursor, etc.
- A reflexive approach to using AI in specs, code, QA, testing, and documentation
- Strong front-end chops: Stimulus/turbo/hotwire, components, etc.
- Experience designing and consuming REST APIs
- Solid SQL skills (PostgreSQL) and an eye for data modeling
- Track record writing maintainable test suites (RSpec) and CI pipelines
- Comfort working autonomously and asynchronously in a high-trust, high-output team
Nice-to-Haves
- Previous fintech or payments or accounting experience
- Familiarity with Plaid, Stripe, or similar
- Experience with observability tooling (NewRelic, Honeybadger, etc.)
- Open-source contributions or personal projects you’re proud of
- Contributions to open-source or side projects involving AI/LLMs
- Using Repomix or similar tooling for large-scale code summarization and reasoning
Perks & Benefits
- Remote-friendly
- Generous PTO and paid holidays
- Equity in a high-growth startup
- Generous professional development stipend
- Home-office setup budget
- Health, dental, and vision insurance (U.S.) + 401(k) match
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*Topkey is a financial technology company and is not a bank. Banking services provided by Thread Bank; Member FDIC.
#J-18808-LjbffrComputer Network Operations (CNO) Developer Lead
This position will drive the development of cutting-edge cyber operations capabilities, leading a team of experts in designing, building, and optimizing mission-critical security solutions.
- Please note that pursuant to a government contract, this specific position requires U.S. Citizenship.
- All applicants must have current DoD TS/SCI with CI Poly clearance eligibility day one and prior to entry on duty.
Work Location: On-site in the Washington, D.C. - Metro Area.
Basic Required Qualifications and Skills: Note: These are mandatory for application consideration. Ensure your submission addresses each.
- 12+ years of experience in cyber operations, security development, or software engineering.
- Expertise in Python and C/C++ for low-level system and network programming.
- Deep understanding of networking (TCP/IP), operating systems (Windows, Unix, Mobile), and system internals.
- Experience in reverse engineering, vulnerability research, and exploit development.
- Track record in developing and optimizing mission-critical cyber solutions.
- Leadership skills with mentoring experience.
- Knowledge of security standards and frameworks (e.g., NIST, DoD guidelines).
Desired Qualifications and Skills: Preferred qualifications include:
- Industry certifications (PCEP, CPP, or equivalent).
- Experience with CI/CD pipelines and DevSecOps.
- Familiarity with Atlassian tools (JIRA, Confluence, Crucible).
Essential Duties and Responsibilities: Includes, but not limited to:
- Provide strategic guidance and mentorship to developers.
- Architect, develop, test, and optimize integrated software/hardware solutions for CNO capabilities.
- Design solutions adhering to security standards and regulations.
- Analyze cybersecurity challenges via reverse engineering and vulnerability assessments.
- Collaborate with leadership to align technical strategies with mission goals.
- Drive initiatives to enhance cyber operations and innovate.
- Perform other duties as assigned.
Salary and Benefits:
Refer to the salary details at the start of this document. Salaries depend on experience, location, and contractual factors. For benefits, visit IMC Careers .
IMC, a Service-Disabled Veteran-Owned Small Business, provides IT services to government and commercial clients, emphasizing modernization and automation. Established in 1989, IMC offers solutions in IT operations, cybersecurity, cloud services, software development, and more. IMC holds various ISO certifications and is CMMC Level 2 compliant. Learn more at .
We are an equal opportunity employer, considering all qualified applicants regardless of race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, or other protected characteristics.
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