Ruby On Rails Developer Contract Jobs in Boston, MA

Creating a delightful customer experience from order creation to delivery is a key part of ezCater's mission. As a Staff Engineer on our Finance Technology team, you will focus on building solutions that will transform ezCater's finance technology platform as ezCater scales and builds new features that enables an agentic commerce future. This will include building a first-class, modern tech stack that pairs ezCater's existing software solutions with AI-enabled tooling. You will focus on designing and implementing features for this new tech stack that will enable performant, safe, and compliant financial transactions for our customers and restaurant partners (RP). This includes credit card processing, invoicing, payouts to Restaurant Partners, and calculating taxes.  

What You'll Do:

• Own the architecture for the Finance Technology platform, which includes pay-ins, payouts, invoicing, and tax calculation. You'll make the architectural calls to unlock the next several years of scale.
• Define clear, well-versioned APIs and contracts for how Finance Technology services are consumed across all channels
• Lead multi-quarter initiatives end-to-end: shape the problem with Product, design the system, break the work down, and deliver alongside the team while staying hands-on in the code.
• Maintain a perspective on the evolving financial technology landscape and lead the technical evaluation of finance technology providers, e.g. payment service providers
• Be a leader in Finance Technology's continued innovation and experimentation on our AI-native SDLC
• Partner with senior technical leaders across ezCater to align on shared pattern and standards
• Lead through collaborative design: whiteboarding, technical discussions, and aligning teams around clear architectural decisions
• Partner with Platform Engineering on shared service patterns, Temporal, observability, secrets, and CI/CD
• Act as a technical multiplier through design reviews, code reviews, architectural guidance, and mentorship
• Be part of an on-call rotation that we work to make as uneventful as possible, and lead the team in triaging and investigating customer-impacting production issues.

What You Have:

• 8+ years of professional development experience, with a focus on backend technologies and building services using Go, Ruby on Rails, Java or similar languages.
• Demonstrated success as the technical lead on multi-quarter, multi-team initiatives - owning the architecture, sequencing the work, and shipping the outcome.
• Deep experience designing, building, and scaling payment-processing and payout systems (e.g., credit card processing, invoicing, refunds, restaurant partner disbursements, tax calculation/reconciliation) in high-volume, customer-facing products.
• Hands-on experience integrating with modern payment service providers and gateways (e.g., Stripe, Adyen, Braintree, card networks), with a strong understanding of payment lifecycles, settlement, chargebacks, and regulatory/compliance considerations (such as PCI and SCA).
• Experience with workflow orchestration technologies such as Temporal
• A quality mindset: security best practices, automated testing clean code, code reviews, and CI/CD principles.
• Excellent written and verbal communication around collaborative system design and technical decision-making
• Practical experience using feature flags, telemetry, and safe rollout techniques to ship incrementally and derisk changes.
• Experience triaging and investigating custom-impacting, production issues.
• Track record collaborating with Product and Design to turn ambiguous problems into iterative deliveries and measurable outcomes.
• Eagerness to give and receive feedback in a collaborative learning environment.
• Friendly, flexible and pragmatic approach to work.
• Ability to travel up to 5 days per quarter for Together Weeks, team gatherings and other events, when applicable.

The national total target cash compensation range for this position, including base salary and bonus target, is $184,000 - $232,000 annually.*

*Please note: Final offer amounts are determined by multiple factors, including prior experience, expertise and region & may vary from the amount above. This range does not represent additional compensation benefits (such as equity, 401K or medical, dental or vision insurance).