Payment Integration Engineer

• Unconfirmed payments

• Payment method-level anomalies

• Investigate and drive incidents to resolution rather than simply escalating them.

• Diagnose provider-side versus platform-side issues using logs, API responses, and transaction data.

• Communicate findings clearly to providers, engineers, and internal stakeholders.

3. Technical Testing & Verification

• Perform hands-on verification of payment integrations.

• Conduct manual checkout testing across mobile and desktop.

• Verify callbacks and API behaviour using Postman or equivalent tools.

• Execute SQL queries to investigate transaction data.

• Validate asynchronous payment statuses, confirmation models, redirect flows, and failure scenarios.

4. Payment Method & Provider Catalogue

• Maintain a comprehensive catalogue of payment methods and providers, documenting:

• Supported capabilities

• Available integration types

• Completed testing

• Known failure modes

• Build the initial capability inventory of all live payment methods and providers.

• Convert ambiguous provider documentation and undocumented operational knowledge into actionable specifications.

5. Payment Performance Analysis

Produce a 90-day breakdown of deposit attempts, categorised by outcome:

• Completed transactions

• Declined by the provider

• Abandoned by the user

• Abandoned during redirect

• Completed but never confirmed back to the platform

Requirements

Essential Qualifications & Experience

• 4+ years of experience in payments, PSP integrations, or fintech platforms, with hands-on ownership of integrations rather than coordination alone.

• Working knowledge of APIs, webhooks, asynchronous payment statuses, callback mechanics, confirmation models, redirect flows, and common failure modes.

• Ability to review provider API specifications and identify missing information.

• Experience using Postman or equivalent tools for API testing.

• Experience performing structured checkout testing across mobile and desktop.

• Proven ability to investigate live payment incidents using logs and API responses.

• Ability to distinguish provider-side issues from platform-side problems.

• Experience translating incomplete or ambiguous technical documentation into clear specifications for engineering.

• Strong communication skills and composure during incidents.

• Basic knowledge of using AI tools in daily work.

• Working proficiency in both English and Russian, as both languages are used daily.

Preferred Qualifications

The following experience will be considered a significant advantage:

• Experience with Alternative Payment Methods (APMs) and local payment rails across Asia, Africa, or LATAM, beyond card payments.

• Knowledge of bank transfer rails, virtual accounts, QR-based payments, mobile money, and similar payment methods.

• Background in brokerage, crypto payments, payment orchestration, or other high-volume payment environments.

• Previous experience working with a PSP, payment gateway, or payment provider.

• Active use of AI tools in daily workflows.

• Ability to work independently and make decisions without constant supervision.

• A proactive approach to identifying improvements, proposing solutions, and implementing new processes.

What Success Looks Like in the First Year

• First Few Months — Operational Ownership

• Take ownership of first-line payment incidents, build the payment method and provider catalogue using documentation and direct investigation, and produce the 90-day deposit attempt analysis.

• By Mid-Year — Integration Acceptance Standards

• Establish the integration acceptance framework and apply it to a live provider onboarding process, from initial engagement through production launch.

• Second Half — Established Processes & Decision-MakingAs the team expands, a Systems Analyst will assume responsibility for formal verification, while the integration acceptance gate remains under your ownership.

• Maintain an accurate and up-to-date provider catalogue, ensure the integration acceptance gate is fully operational, and take ownership of incident-related decisions.

Recruitment Process

Our recruitment process consists of four stages:

• HR Interview: Background, motivation, and overall role alignment.

• Technical Interview: Payment integration knowledge, technical tools, hands-on experience, and incident diagnosis.

• Product & Problem-Solving Interview: Integration decisions, prioritisation, and practical problem-solving.

• Final Interview: Discussion with senior stakeholders.

What We Offer

• Competitive fixed monthly compensation, depending on experience.

• Fully remote working arrangement within GMT to GMT+4, with no relocation required.

• End-to-end ownership of payment provider integrations, from the first technical call through production.

• Authority to make go/no-go decisions for every integration.

• Opportunities to expand your responsibilities as the business grows, including cards, alternative payment methods, a card programme, and new entities.

• Access to corporate AI tooling as part of the daily working process.

Originally posted on Himalayas

• Payment Integration Engineer
• Payment Systems Integration Manager
• Payments Engineer
• Payment Systems Engineer

Source: Himalayas