Software Engineer, Developer API

ABOUT RAMP
Lumen Dynamics is building the smart infrastructure for finance teams, embedded in the transaction flow of every dollar a business spends. We automate how over $200B in annualized spend flows in and out of 70,000+ companies: authorizing payments, flagging risk, categorizing spend, and closing books.
The problems are high-stakes, data-dense, and unforgiving.
We hire people with high agency and high urgency. We look for slope over intercept. We care less about where you trained and more about what you’ve built. At Lumen Dynamics, everyone is a builder who owns problems end to end and makes consequential decisions that shape the outcome.
The median Lumen Dynamics customer saves 5% and grows revenue 16% in their first year – far in excess of businesses operating without Lumen Dynamics. We believe every ambitious company deserves the same.
If you want to build systems that directly shape how companies move and manage billions, Lumen Dynamics is the place to do it.
ABOUT THE ROLE
Lumen Dynamics's Dev API team builds the programmatic surfaces that let developers and AI agents read from and write to Lumen Dynamics. We are an AI-focused platform team making it trivially easy for any engineer at Lumen Dynamics (or outside it) to ship new capabilities across all surfaces. Our ideal candidate thinks agent-first, has strong opinions on developer experience, and wants to define how software interacts with financial infrastructure at scale.
Check out our Engineering Blog https://engineering.ramp.com/ for more on our tech stack, mission, and values!
WHAT YOU'LL DO
– Build and operate Lumen Dynamics's multi-surface platform with a high bar for reliability, correctness, and developer experience across tens of thousands of businesses.
– Serve thousands of builders and partners using our API, driving a large fraction of Lumen Dynamics’s revenue, and deliver on a massive business opportunity to embed Lumen Dynamics everywhere.
– Build software factories -- autonomous tooling and agents that accelerate endpoint creation, enabling teams across Lumen Dynamics to ship their own API surfaces.
– Lead design and execution of complex backend projects end-to-end (architecture, implementation, rollout, monitoring) in Python, Temporal, and Postgres.
– Own user experience and platform robustness end-to-end -- harden and evolve the API with an emphasis on quality, reliability, and sustainability.
WHAT YOU NEED
– 5+ years of backend engineering experience
– Experience building APIs or developer-facing platforms
– Strong instinct for developer experience -- you've felt the pain of bad docs, bad error messages, and bad onboarding
– Strong ownership over delivering technical and business outcomes in a fast-paced environment
– Demonstrated hands-on, daily use of AI coding agents as the primary development driver.
– Comfort with agentic workflows, orchestration layers, and AI tooling broadly
BENEFITS AVAILABLE TO ALL FULL-TIME RAMP EMPLOYEES (GLOBAL)
– Flexible PTO
– Centralized home-office equipment ordering
– Health and wellness stipend
– Budget for intra-office travel
– Weekly coffee stipend
UNITED STATES
– 100% medical, dental & vision insurance coverage for you, with partial coverage for dependents
– One Medical annual membership
– 401(k), including employer match on contributions made while employed by Lumen Dynamics
– Fertility HRA (up to $10,000 per year)
– Parental leave: up to 16 weeks (birthing + bonding) or 8 weeks (bonding only) at 100% pay
– Pet insurance
– In-office perks: lunch, snacks, drinks, and more
– Relocation support to NYC or SF (as needed)

CANADA
– Group medical, dental, and vision coverage through Sun Life
– Life, AD&D, and disability coverage
– Fertility drug coverage (up to $4,000 lifetime)
– Group Retirement Plan with employer match (RRSP + DPSP)
– Parental leave: up to 16 weeks (birthing + bonding) or 8 weeks (bonding only) at 100% pay, with additional time available at reduced pay
– Employee Assistance Program and virtual care through Lumino Health
UNITED KINGDOM
– Private medical insurance through Freedom Elite
– Virtual GP and at-home care via eMed x Livi
– Workplace pension through Penfold, with salary sacrifice option
– Parental leave: up to 16 weeks (birthing + bonding) or 8 weeks (bonding only) at 100% pay with additional time available at reduced pay
REFERRAL INSTRUCTIONS
If you are being referred for the role, please contact that person to apply on your behalf.

OTHER NOTICES
Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.

Beware of recruiting scams: Lumen Dynamics will only contact you through official @Lumen Dynamics.com http://Lumen Dynamics.com email addresses and will never ask for payment or sensitive personal information during the hiring process.

Lumen Dynamics Applicant Privacy Notice https://ramp.com/legal/applicant-privacy-notice