Hire Senior
FinTech Developers
& Payment Consultants

Hire senior fintech developers backed by deep payment domain expertise. DMexec delivers the engineering — payment processing platforms, architecture, system integration — while our payment consulting network brings 200+ domain specialists across A2A, open banking, cards issuing, PSD2/PSD3 and payment licensing. Staff augmentation, fintech outsourcing, or end-to-end delivery — one engagement.

  • Payment gateway development, A2A rails, open banking API integrations — production-hardened
  • Cards issuing platforms, EMI licensing, PSD2/PSD3 compliance — strategy through implementation
  • FinTech engineering delivery — microservices, event-driven, cloud-native at scale
  • European base — US & EU timezone coverage, regulatory-first by default
200+
Payment consultants in partner network
260+
FinTech projects delivered
12 yrs
Payments domain experience
6
Payment domains covered
EU & UK
Regulatory expertise

Strategy, Build
& Go-Live — Together

Payment platform transformation, open banking integration, cards issuing launch — tell us where you're starting and we will map the path from concept to production.

Book a Discovery Call

Engineering Stack

Payment Protocols
ISO 20022SWIFTSEPAOpen Banking APIsFPS / BACS3DS2 / EMVPCI DSSPISP / AISP
Backend & APIs
C# / .NET CoreJavaPythonREST / gRPCPayment ProcessingOAuth2 / OIDCGraphQLNode.jsSOAP / XML
Cloud & Infra
AzureAWSKubernetesDockerEvent-Driven ArchitectureAPI GatewayMessage QueuesMicroservices
Data & Risk
PostgreSQLRedisMongoDBElasticsearchML / AI ModelsReal-Time Fraud DetectionAML Engines
Compliance
PSD2 / PSD3EMI / PI LicensingGDPRKYC / CDDAML FrameworksSanctions ScreeningRegulatory Reporting
Cards & Acquiring
BIN ManagementReal-Time AuthorizationSettlement & ReconciliationPrepaid / Debit / CreditMerchant AcquiringInterchange Optimisation

Payment Domains

🔄
A2A Payments
Account-to-account payment rails, instant payment infrastructure, ISO 20022 migration, SEPA Credit Transfer and FPS integrations for direct bank payment initiation.
💳
Cards Issuing & Acquiring
Full card programme setup — BIN sponsorship, prepaid/debit/credit issuance, real-time authorization, settlement, reconciliation, and merchant acquiring with interchange optimisation.
🏦
Open Banking
PSD2/PSD3-compliant payment initiation (PISP) and account information (AISP) integrations. Open Banking API development, TPP connectivity and consent management platforms.
📋
Payment Licensing
EMI and PI license acquisition strategy, regulatory sandbox navigation, compliance framework design and operational readiness for regulated payment institutions across EU and UK.
🛡️
Risk & Compliance
AML programme design, real-time transaction monitoring, fraud detection systems, sanctions screening, regulatory reporting and audit-ready compliance infrastructure.
🔍
KYC / CDD & Identity
Digital onboarding platform engineering, automated identity verification, customer risk profiling, enhanced due diligence workflows and continuous monitoring pipelines.

Projects

01
Global Payment Platform — Multi-Rail Authorization, 100+ Banks
Tech Lead and Architect on a global payment platform authorised across 100+ banks in Latin America, the United States, Europe and Canada. Led architecture and technical strategy for AI-driven process optimisation across EMEA — designed scalable microservices integrating Azure Data Lake with AI/ML models for predictive risk and routing. Managed cross-functional delivery teams with regular architecture reviews, clean code standards, and CI/CD pipelines for continuous multi-continent deployment.
ASP.NET CoreAzure Data LakeAI/MLKubernetesPostgreSQLISO 20022
02
FinTech Platform — Real-Time Payment Processing, Two Continents
Directed two cross-functional teams totalling 22 members for British and American projects on a real-time global payment processing platform. Designed and deployed CI/CD pipelines for microservices, containerised PDF generation with AWS S3 integration, and conducted bottleneck analysis across UI, backend, ETL and data lake layers — delivering performance improvements that cut costs and accelerated release cycles for both markets simultaneously.
ASP.NET CoreDocker / K8sAWS S3PostgreSQLGitLab CI/CDReact
03
Open Banking Integration — PSD2-Compliant Payment Initiation Service
Designed and built a PSD2-compliant payment initiation and account information service for a European fintech — integrating with multiple bank APIs via standardised Open Banking connectors. Implemented OAuth2/OIDC consent flows, strong customer authentication (SCA) handling, and real-time payment status webhooks. Delivered API gateway layer with rate limiting, retry logic and full audit logging for regulatory reporting.
Open Banking APIsOAuth2 / OIDCPSD2 / SCAREST / WebhooksAPI GatewayAzure
04
Cards Issuing Platform — BIN Management & Real-Time Authorization
Engineered the core processing layer for a prepaid card programme — BIN configuration, real-time authorization engine, transaction routing and settlement reconciliation. Built event-driven architecture handling authorization requests under 200ms latency SLA. Integrated with card network APIs for EMV transaction processing, 3DS2 authentication and dispute management workflows.
BIN ManagementEMV / 3DS2Event-DrivenJavaPostgreSQLRedis
05
Real-Time Fraud Detection — ML Risk Scoring at Transaction Layer
Built a real-time fraud detection pipeline integrated directly into the payment authorization flow — ML models scoring each transaction in under 50ms against behavioural, velocity and device signals. Designed feature engineering pipeline with Apache Airflow, online model serving with Redis-backed feature store, and a rules engine for sanctions screening and AML transaction monitoring with automated escalation workflows.
ML / AI ModelsApache AirflowRedisPython / PandasAML EnginePostgreSQL
06
KYC / CDD Onboarding Platform — Automated Identity Verification
Architected a digital onboarding platform for a regulated payment institution — integrating third-party identity verification providers, document OCR, liveness detection and sanctions screening into a single orchestrated workflow. Built a risk-based customer profiling engine assigning CDD levels dynamically. Implemented continuous monitoring pipelines for re-screening existing customers against updated watchlists, with audit-ready compliance reporting for regulatory submissions.
KYC / CDDIdentity VerificationSanctions ScreeningREST APIsEvent-DrivenGDPR
07
EMI License Implementation — Compliance Framework & Operational Readiness
Supported a European fintech through EMI license acquisition — from regulatory gap analysis and compliance framework design to operational readiness review. Engineered the technical infrastructure required by the regulator: AML programme, transaction monitoring system, record-keeping architecture and incident response workflows. Coordinated with legal, compliance and product teams across a 12-month engagement through application submission and authorisation.
EMI LicensingPSD2 / PSD3AML FrameworkRegulatory ReportingCompliance ArchitectureEU Regulatory

Why Our Team

Typical FinTech agencyDMexec
Domain depthGeneric tech delivery. No dedicated payments specialists. Domain knowledge is an add-on.
200+ payment consultants in network. Domain expertise is the foundation, not the footnote.
Engineering qualityJunior-heavy delivery teams. Seniors review only — rarely hands-on.
100% senior engineers. Architecture ownership from day one — not ticket-taking.
End-to-end scopeStrategy and delivery are separate engagements. Handoff gaps kill timelines.
Consulting + engineering under one roof. Strategy flows directly into implementation — no translation loss.
AI toolingAd-hoc or policy-blocked. No measurable velocity gain.
Daily use of Claude Code, Cursor & Copilot. +30% faster engineering delivery.
Cost vs. UK/US market10–30% savings at best. Junior fill inflates the headcount, not the output.
40–60% less than UK/US market. Senior-only. Fixed monthly rate, no junior padding. Also available: .NET and Microsoft stack teams.
Compliance postureAdd-on. Requires separate compliance consultant after delivery.
PSD2/PSD3, PCI DSS, GDPR and AML-aware by default. Regulatory-first architecture, not retrofitted.
Time to first output4–6 weeks ramp-up. Discovery theatre before any deliverable.
First sprint output in 1 week. No ramp-up theatre — contributing from day one.

FAQ

The team covers six core payment domains end-to-end: A2A payments and instant payment rails, cards issuing and merchant acquiring, open banking (PSD2/PSD3 PISP and AISP), payment licensing (EMI and PI), risk and compliance (AML, fraud detection, sanctions screening), and KYC/CDD identity onboarding. 200+ domain consultants back the practice; DMexec delivers the engineering and platform builds that bring strategy to production.

Yes. The engineering team has built payment initiation and account information services compliant with PSD2 — OAuth2/OIDC consent flows, SCA handling, bank API connectivity and real-time payment status webhooks. For A2A specifically, the team has worked on ISO 20022 migration, SEPA Credit Transfer integrations and instant payment rails. The consulting team provides the strategic overlay: scheme selection, routing strategy and go-to-market for new A2A products.

Yes — both on the consulting and engineering side. The payment consultants have guided regulated institutions through PSD2 implementation and are tracking PSD3 and PSR developments closely. On the engineering side, DMexec builds the technical compliance infrastructure: SCA flows, consent management, API standards alignment, audit logging and regulatory reporting pipelines. If you are starting a new regulated service or updating an existing one for PSD3, that is a solved problem across this team.

The team has built the core processing layer for prepaid card programmes — BIN configuration, real-time authorization engines under 200ms latency SLA, transaction routing, settlement reconciliation and dispute management. The consulting team brings expertise across programme structuring, BIN sponsorship agreements, card network relationships and interchange strategy. Whether you are launching a new card product or integrating an existing programme into a broader payment platform, the team covers the full stack from scheme negotiation to production infrastructure.

Typically, payment domain consultants lead the domain assessment — payment strategy, regulatory positioning, scheme selection, vendor evaluation — and hand structured requirements directly to the DMexec engineering team. Because the two teams work together rather than in sequence, there is no translation loss between what the business wants and what gets built. Engagements can start with consulting only, engineering only, or both in parallel depending on where you are in your product lifecycle. Book a 15-minute call and we will map the right model for your situation.

Yes — fintech staff augmentation is a core model. You embed one or more senior fintech engineers directly into your existing team: your Jira board, your standups, your Git workflow. There is no agency layer and no separate management overhead. Engineers integrate as if hired directly — without recruiter fees, onboarding delays or employer-of-record complexity. The partner network also places interim payment specialists and project managers into client teams when domain expertise is needed alongside engineering capacity. Fixed monthly rates, first sprint output within the first week.

Payment platform transformation typically spans three phases: assessment (current state mapping, gap analysis, target architecture design), build (new platform engineering, legacy migration, third-party integrations) and go-live (testing, regulatory sign-off, operational handover). The team covers all three — domain consultants lead the strategy and regulatory phases, DMexec leads the engineering and delivery phases. Projects range from greenfield payment platform builds to migrating monolithic legacy systems to modern microservices architectures aligned with ISO 20022 and open banking standards.

Yes — all engineers work remotely. The DMexec engineering team is European-based, giving full EU timezone coverage with meaningful US overlap. The consulting network spans specialists across Europe. For clients in the US or Australia, daily standups in the European morning provide a solid overlap window. Async-first communication, direct Slack access and weekly sync calls mean there is no coordination lag regardless of where your team sits.

Both. Staff augmentation (embedding senior engineers into your team on a fixed monthly rate) and project-based delivery (end-to-end scope, milestone-driven, fixed or time-and-materials) are both available. For most fintech builds — payment platform launches, open banking integrations, cards issuing rollouts — a blended model works best: a project team for the initial build with one or two engineers staying on for ongoing platform ownership. Book a call and we will recommend the right structure based on your team size, timeline and budget.

Fixed monthly rate per developer or consultant — no agency markup, no recruiter fees, no hidden costs. Senior fintech developers and payment engineers are priced at a significant discount to equivalent UK, US or Western-European agency rates. Consulting engagements are structured separately based on scope. Book a 15-minute call and we will give you a straight number within the first conversation — no discovery decks, no drawn-out proposal cycles.

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