Senior Software Engineer

Order.co is a guided B2B marketplace with a mission to simplify buying for businesses. Order.co makes it easy for businesses to place and track purchases across all their vendors, control spend, and make payments in a single, consolidated bill. Tailored insights and purchasing recommendations fuel smarter spending decisions so businesses can easily save time and money on what they need to grow. Founded in 2016 and headquartered in New York City, Order.co oversees nearly half a billion in annualized spend across hundreds of customers like WeWork, SoulCycle, Lume, and High-Level Health. Order.co has raised $50M in funding from industry-leading investors like MIT, Stage 2 Capital, Rally Ventures, 645 Ventures, and more. Order.co has been proudly named a 50 to Watch by Spend Matters and a Best Place to Work by BuiltIn and Inc. Magazine. The Role Deliver complex features reliably while raising the technical bar of the team. At this level, your scope extends from individual features to subsystems — you own the outcome, not just the task. Responsibilities Design and implement complex features end-to-end; own subsystems and navigate existing codebases with architectural discernment, using AI tooling as an accelerant while applying your own judgment on correctness, security, and alignment with the system's directionParticipate in design reviews; propose sound technical designs and identify scalability, performance, and reliability risks before they become incidentsScope and estimate accurately; deliver features from requirements through rollout and post-release monitoring; communicate risks earlyMentor junior and mid-level engineers through code reviews and pairing; provide substantive feedback that raises the quality of code around youDrive improvements in team practices — testing patterns, observability, code organization — and push back on shortcuts that create long-term costExplain technical decisions clearly to both technical and non-technical stakeholders; represent engineering in product discussions with a security lens What We're Looking For You own outcomes, not just tasks — accountability motivates youYou build incrementally and surface risks early; you don't absorb uncertainty silentlyYou help people around you grow through reviews, pairing, and direct feedbackProduction-grade Ruby on Rails; PostgreSQL with confidence in data modeling and query performanceExperience building integrations with external systems — REST/GraphQL APIs, webhooks, or third-party vendor connectionsFamiliarity with AWS, CI/CD pipelines, and deployment fundamentalsFamiliarity with AI coding assistants (e.g., Claude, GitHub Copilot); you understand where they help and where they fail — hands-on use is a plus, critical evaluation instinct is required Failure Modes We Screen Against Strong coder, weak owner — ships code but doesn't own outcomes. Solo expert — hoards knowledge instead of sharing. An overconfident designer — proposes solutions without considering trade-offs. Interview Process Round Format What We Evaluate 1 — Hiring Manager Screen 60 min, conversational Career trajectory, mentorship philosophy, technical influence examples, communication style 2 — Live Debugging & Refactoring 60 min, live coding Navigating unfamiliar code, root-cause debugging, code quality judgment, AI tool usage 3 — System Design + AI Proficiency 60 min, Miro board Requirements gathering, schema/API design, trade-off articulation, AI-augmented design segment 4 — Team Interview 2 × 45 min Collaboration, mentorship examples, end-to-end delivery narrative 5 — Culture Add 30 min, People Team Organizational values alignment AI coding assistants are allowed in Rounds 2 and 3. We observe how you use them, not whether you use them. What You’ll Receive Competitive compensation including base salary, bonus, and equityEmployer-sponsored 401(k) with matchComprehensive medical, dental, and vision coverageFlexible time off and hybrid work environmentOpportunity to build and scale a critical function at a high-growth fintech company The anticipated annual salary range for this role is $175,000–$195,000. Actual compensation and title will be commensurate with experience, qualifications, knowledge, and skills. Locations: Manhattan, NY