Lead Software Engineer

Mphasis; Toronto; On-site; CAD 110,000 - 160,000; Full time

Job summary

Mphasis is seeking a senior software engineer to design, build, and maintain backend financial and payments system flows in a cloud-based platform. You will influence architecture, drive design decisions, and deliver new features while documenting data flows and ensuring regulatory compliance.

You will mentor engineers, collaborate with cross-functional partners, and translate business requirements into technical specifications, with a focus on payments, rails, and digital assets.

Qualifications

• 5+ years in software engineering for cloud-based, production services with SOA knowledge.
• Experience designing backend fintech/payments flows (APIs, rails, settlement, or digital assets).
• Proficient in Python, Next.js/React, Golang or C#, with database usage.
• Ability to translate business requirements into technical specs.
• Strong written and verbal communication; capable of clear technical docs.
• Leadership and influencing skills without direct reports.
• Self-directed, multi-priority work style; problem-solver with organizational skills.
• Familiarity with blockchain tech or crypto-oriented services is a plus.

Responsibilities

• Design, build, and maintain backend financial and payments system flows.
• Influence architecture and lead design decisions for platform payments.
• Develop, test, and launch new platform features and releases.
• Document processes and key data flows; ensure regulatory compliance.
• Mentor engineers on code quality and requirements-writing practices.

Skills

Software engineering

Backend systems

Payments fintech

APIs

Python

Next.js/React

Golang

C#

PostgreSQL

DynamoDB

Cloud/microservices

Documentation

Blockchain/crypto

Tools

PostgreSQL

DynamoDB

REST APIs

Job description

Product & Requirements Enablement

• Design, build, and maintain backend financial and payments system flows (e.g., core banking, ACH, wire, card, and digital asset transaction processing).
• Influence software architecture and lead design decisions for the Platform, with particular focus on payments and money‑movement systems.
• Develop, test, and launch new features and releases for the Platform.
• Document processes and key data flows
• Ensure compliance with regulatory requirements and support audit certification efforts, including documenting systems for regulatory and internal audit purposes.

Leadership & Team Enablement

• Set technical direction and best practices that enable other engineers to deliver high‑quality work independently.
• Influence and align cross-functional partners and engineering peers without relying on formal authority or direct reports.
• As needed mentor engineers on logic, code quality, and requirements‑writing practices.
• Make independent, sound decisions on system design and process improvements within defined parameters.

Skills and Experience

• Minimum of 5 years of experience in software engineering, including designing, building, deploying, scaling, and maintaining modern, cloud‑based production services, with knowledge of service‑oriented architecture.
• Proven experience designing and building backend financial or payments system flows (e.g., APIs workflows supporting core banking, payment rails, ledgers, settlement, or digital asset transaction processing).
• Proficiency writing high‑quality, well‑tested code using one or more languages (e.g., Python, Next.js, React, Golang, C#), building APIs, and building/using databases (e.g., Postgres, DynamoDB).
• Demonstrated ability to gather and translate business requirements into technical specifications
• Strong written and verbal communication skills, with the ability to create clear, detailed technical and functional documentation.
• Leadership and influencing skills comfortable guiding and developing other engineers and driving alignment across teams without formal direct-report authority.
• Self‑directed work style with the ability to manage multiple priorities and make sound independent decisions.
• Creativity, organization, and troubleshooting skills.
• Experience with Blockchain technology (e.g., Bitcoin, Ethereum) or crypto‑forward experience, including familiarity with onchain activity and dApps or blockchain‑based services is a nice to have.