Lead Backend Engineer – FinTech — ALL KNOWN SERVICES, California, United States

Job title: Engineering Lead – FinTech

Location: San Francisco, CA (Onsite)

Employment Type: Full-Time

Experience: 5+ Years in FinTech Software Development

Visa : Only USC, TN, H4 EAD, H1B Transfer

Relocation: Assistance Available

About the Role

We're seeking an experienced FinTech Engineering Lead to help build the next generation of global banking and digital wallet infrastructure.

Our client is developing a unified financial platform combining virtual banking, payments and cryptocurrency wallets to make financial services more accessible across emerging markets.

You'll work directly with the technical founders, shaping engineering standards and building secure, reliable and high-performance financial applications that handle real money at scale.

We're particularly interested in engineers with hands-on experience in B2C banking, stablecoin infrastructure or payment systems.

What You'll Do

• Lead the development of highly scalable and secure backend financial systems.

• Build and maintain backend applications and REST APIs.

• Work with banking and cryptocurrency service providers.

• Develop and integrate authentication, ledger and payment infrastructure.

• Establish engineering standards and technical best practices.

• Build reliable systems supporting international financial transactions.

• Collaborate directly with technical founders on architecture and product development.

• Drive performance, security and reliability across critical financial services.

Must-Have Skills

• 5+ years of experience building and shipping FinTech software.

• Deep hands-on expertise in at least ONE of the following:

• Financial ledgering.

• Payments processing.

• Stablecoin infrastructure.

• Risk and fraud management.

• Strong backend engineering experience.

• Experience working with PostgreSQL, Redis and AWS.

• Strong technical ownership and system design capabilities.

Technical Stack

• Python / FastAPI

• PostgreSQL

• Redis

• AWS

• Go / Rust for performance-oriented services

Nice-to-Have Skills

• Full-stack software engineering experience.

• Experience building digital banking and cryptocurrency wallet products.

• International payments and financial service integrations.

• Experience with large-scale consumer financial applications.

Why Consider This Opportunity?

• Work directly with experienced technical founders.

• Own critical engineering decisions and product architecture.

• Build financial infrastructure serving customers globally.

• Make a significant impact in the growing stablecoin and digital banking ecosystem.

Additional Information

• San Francisco-based opportunity.

• Relocation assistance available, with an estimated 1–2-month timeline.

• Visa sponsorship available, including H-1B transfer support.

• Immediate start preferred; reasonable notice periods can be accommodated.

• The interview process includes technical assessments and a three-hour in-person interview in San Francisco. Travel reimbursement is available if required.