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About the Role

The Technical Account Manager serves as the primary technical point of contact for clients integrating with our payment gateway API, blending deep technical expertise with consultative problem-solving. This high-impact role is suited for seasoned experts or high-potential Computer Science graduates eager to translate complex business requirements into technical solutions within a fast-evolving fintech landscape.

Responsibilities

Act as the primary technical liaison for clients integrating with our payment gateway API and provide consultative guidance from initial design to production deployment.
Interpret client business requirements and translate them into practical implementation strategies.
Support clients across multiple programming languages and frameworks, offering hands-on troubleshooting for authentication, transaction flows, and webhook delivery.
Review client API payloads, logs, and code samples to identify issues and provide actionable solutions.
Maintain deep knowledge of our API specifications, SDKs, and authentication models, adapting quickly to new feature launches.
Partner with product and engineering teams to relay client feedback, identify usability gaps, and drive platform improvements.
Support Client Implementations, Solution Engineers, and Product teams while creating integration guides and troubleshooting playbooks.
Participate in client calls, technical workshops, and integration reviews.

Requirements

10+ years of experience in technical integration, solutions engineering, or API-focused support; or a Bachelor’s degree in Computer Science or a related technical field with a strong grasp of software fundamentals.
Strong understanding of REST APIs, JSON, webhooks, and authentication models (OAuth, API keys, HMAC).
Proficiency in at least one modern language (e.g., Java, Python, JavaScript, C#, PHP, Ruby) with the ability to read and interpret code across multiple languages.
Experience troubleshooting integrations involving HTTP requests, API responses, network issues, and application logs.
Excellent ability to simplify complex concepts for both technical and non-technical audiences.
Ability to thrive in a fast-paced environment and support emerging features with minimal guidance.
Direct experience with global payments, e-commerce, and Card Present (CP) integrations is highly preferred.
Familiarity with encryption standards, including TLS, PGP, and tokenization.
Experience managing integrations for enterprise-scale clients with complex organizational hierarchies.
Working knowledge of SQL/NoSQL databases, SFTP protocols, and modern cloud infrastructure.
Strong analytical and critical-thinking abilities with a consultative, client-success mindset.

Skills

REST APIs
JSON
Webhooks
OAuth
API keys
HMAC
Java
Python
JavaScript
C#
PHP
Ruby
HTTP requests
API responses
Network issues
Application logs
TLS
PGP
Tokenization
SQL
NoSQL
SFTP
Cloud infrastructure

Experience Level

10+ years of experience

Education Level

Bachelor’s degree in Computer Science or a related technical field

About the Company

Fiserv is a global leader in Fintech and payments, and we move money and information in a way that moves the world.
We connect financial institutions, corporations, merchants, and consumers to one another millions of times a day – quickly, reliably, and securely.
Any time you swipe your credit card, pay through a mobile app, or withdraw money from the bank, we’re involved.
If you want to make an impact on a global scale, come make a difference at Fiserv.
There's a reason why Fiserv is the global leader in information management and electronic commerce systems for the financial services industry.
It's our people.
If you are a talented professional who gets excited by the challenge of helping Fiserv lead the transformation of financial services technology for our clients' benefit, we encourage you to explore career opportunities with Fiserv, where turning possibilities into realities is the norm.

Equal Opportunity

Fiserv is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, gender, gender identity, sexual orientation, age, disability, protected veteran status, or any other category protected by law.