We’re looking for a Technical Product Manager to own this integrations platform end-to-end. This is a deeply technical role: you will define API contracts, own the developer experience for merchant integrations, drive architectural decisions on the integrations layer, and work shoulder-to-shoulder with Engineering on system design, reliability, and platform evolution.
\n\tThis is not a role for someone who bridges business and tech from a distance. You will be in the detail \u2014 reviewing API specs, participating in architecture reviews, writing precise technical requirements, and holding the bar on integration quality. You will also translate that technical depth into commercial outcomes, working closely with Merchant Success, Commercial, and Compliance to ensure the integrations platform drives merchant growth and operational excellence.<\/p>\n
What you\u2019ll be responsible for:<\/p>\n
Platform strategy and technical roadmap<\/p>\n
\tOwn the product vision and technical roadmap for PayJustNow’s integrations platform \u2014 covering the public API, SDKs, webhook infrastructure, merchant plugins, gateway connections, and payment rail connectivity.
\n\tDrive the API strategy \u2014 versioning, deprecation policy, backwards compatibility, and the developer experience for merchants integrating with PayJustNow.
\n\tDefine and own the integration architecture strategy in close partnership with Engineering \u2014 making informed build vs. buy vs. partner decisions and setting the technical direction for platform scalability and extensibility.
\n\tTrack evolving payment standards (3DS2, tokenisation, open banking, card scheme mandates, ISO 20022) and translate compliance requirements into precise technical roadmap items.
\n\tOwn the platform’s non-functional requirements \u2014 latency SLAs, uptime targets, throughput capacity, security posture (PCI-DSS, TLS standards), and failover behaviour.<\/p>\n
Delivery and Technical Execution<\/p>\n
\tConduct deep technical discovery across the integrations stack \u2014 audit existing APIs, review integration error logs, analyse failure modes, and map technical debt.
\n\tWork directly with Engineering to understand root causes of transaction failures, integration degradation, and merchant-reported issues at a system level.
\n\tEvaluate third-party gateway and PSP APIs \u2014 assessing capabilities, reliability, documentation quality, and certification requirements \u2014 to inform build vs. partner decisions.
\n\tIdentify and document integration gaps that are blocking merchant acquisition or expansion, translating commercial inputs into precise technical problem statements.
\n\tLead proof-of-concept work alongside Engineering to de-risk new integration patterns or architectural approaches before committing to full delivery.<\/p>\n
Delivery and Technical Execution<\/p>\n
\tAuthor detailed technical product requirements \u2014 API specs (OpenAPI\/Swagger), data models, sequence diagrams, error handling schemas, and webhook payload definitions.
\n\tLead cross-functional delivery squads through the full integration lifecycle: design, build, QA, certification, and production rollout for APIs, SDKs, and merchant plugins (WooCommerce, Shopify, Magento, etc.).
\n\tDefine and enforce integration quality standards \u2014 test coverage expectations, sandbox environments, API contract testing, and developer documentation requirements.
\n\tOwn the incident response process for integration failures \u2014 triaging production issues, coordinating Engineering response, and leading post-mortems to drive systemic fixes.
\n\tManage PSP and gateway technical relationships \u2014 driving certification processes, escalating reliability issues, and influencing partner roadmaps.<\/p>\n
Stakeholder Collaboration<\/p>\n
\tServe as the technical authority for PayJustNow’s integrations platform \u2014 the person Engineering, Commercial, and Merchant Success rely on for integration decisions.
\n\tCommunicate system complexity and architectural trade-offs clearly to non-technical stakeholders and senior leadership.
\n\tSupport the commercial and sales process with technical integration assessments \u2014 capability mapping, feasibility timelines, and integration effort sizing for prospective merchants.
\n\tEngage with PSP and gateway partners at both technical and commercial levels \u2014 influencing their roadmaps and securing early access to new capabilities.<\/p>\n
Measurement and Reliability<\/p>\n
\tDefine and own the platform’s technical health metrics, including:
\n\tTransaction success rate (TSR) by gateway and merchant segment
\n\tAPI error rates, latency percentiles (p50\/p95\/p99), and uptime SLAs
\n\tIntegration time-to-live for new merchant onboarding
\n\tWebhook delivery success rate and retry performance
\n\tGateway-level authorisation rates and decline reason analysis
\n\tRun regular reliability reviews \u2014 proactively identifying degradation trends before they become incidents or commercial problems.
\n\tChampion engineering excellence in the integrations layer: drive down technical debt, improve observability, and establish clear on-call and escalation protocols.<\/p>\n
What we\u2019re looking for:<\/p>\n
Experience:<\/p>\n
\t5+ years’ experience in a technical product management role \u2014 owning API platforms, integrations infrastructure, or developer-facing products.
\n\tDeep familiarity with RESTful API design, webhook architectures, OAuth\/authentication patterns, and API versioning strategies.
\n\tHands-on experience in payments \u2014 gateway integrations, PSP relationships, card scheme rules (Visa\/Mastercard), and payment rail connectivity.
\n\tProven track record writing high-quality technical specifications: API contracts (OpenAPI\/Swagger), data models, sequence diagrams, and system design documents.
\n\tExperience with merchant plugin ecosystems (Shopify, WooCommerce, Magento, or similar) is a strong advantage.
\n\tComfortable with PCI-DSS requirements, tokenisation, and operating in regulated financial services environments.<\/p>\n
Technical skills and strength<\/p>\n
\tAble to read and write API specifications, review pull requests for product correctness, and engage in architecture discussions as a peer \u2014 not just an observer.
\n\tProficient with developer tooling: API testing tools (Postman, Insomnia), log analysis (Datadog, Splunk, or equivalent), and familiarity with CI\/CD concepts.
\n\tUnderstands distributed systems concepts relevant to payments: idempotency, eventual consistency, retry logic, circuit breakers, and failover patterns.
\n\tData-fluent \u2014 able to write SQL or work with analytics platforms to interrogate transaction data, error rates, and performance metrics directly.
\n\tStrong technical writer \u2014 produces clear, precise specifications that Engineering can build from without ambiguity.<\/p>\n
Mindset<\/p>\n
\tReliability-obsessed \u2014 you understand that every percentage point of TSR improvement has direct commercial value, and you hold the bar on platform stability.
\n\tTechnically humble \u2014 you work with engineers as a peer, earn trust through precision and follow-through, and know when to defer to engineering judgement.
\n\tCommercially connected \u2014 you don’t get lost in technical detail; you always trace engineering decisions back to merchant experience and business outcomes.
\n\tSystematic thinker \u2014 you approach complex integration problems methodically, document clearly, and build platforms designed to scale.
\n\tPragmatic \u2014 you know when to invest in architectural correctness and when to ship a pragmatic fix while tracking the debt.
\n\tAI-enabled \u2014 you actively use a range of modern AI tools (including Claude, Cursor, and AI coding assistants) as part of how you work daily: to write sharper specs, research integration patterns, synthesise incident data, and accelerate problem-solving. Fluency across the current AI landscape is a baseline expectation, not a differentiator.
\n\tCommitted to the craft \u2014 you invest in your development as a PM through books, communities, and engagement with leading practitioners. You can articulate the frameworks and mental models \u2014 from API design principles to continuous discovery \u2014 that guide how you work.<\/p>\n
go to method of application \u00bb<\/p>\n
Apply via company website ( ) or<\/p>\n
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