Senior Backend Engineer - Core Banking Platform, AI-Driven

Maximum Technologies, Inc.; United States; Remote; USD 120,000 - 180,000; Full time

Job summary

Maximum is building a core banking platform with a focus on correctness and end-to-end ownership of domain services. You will design, implement, and maintain schemas, APIs, workflows, tests, and related documentation from day one.

Expect to work with real environments, on-call duties, and collaboration with engineers and AI agents to drive reliable systems. You will contribute across services, reviewing PRs, translating messy inputs into robust data models, and ensuring durable production

Qualifications

• Shipping backend services in a statically typed language (Go preferred).
• Real SQL experience: transactions, isolation levels, indexing, migrations.
• Debugged a distributed system and understand idempotency and at-least-once delivery.
• A testing habit and preference for testing against real dependencies rather than mocks.
• Able to read unfamiliar specs, ask the two questions that matter, and start building quickly.
• Use of AI coding agents with discernment and know when to discard outputs.

Responsibilities

• Own a domain service end-to-end: schema, gRPC API, workflows, tests, and docs.
• Design tables and queries in our schema DSL.
• Write workflows that are replay-safe, idempotent, and resumable.
• Test against real environments in containers; mocking is a last resort.
• Review pull requests from humans and agents with equal scrutiny.
• Transform messy external inputs into a coherent data model (vendor specs, regulations, features).
• Carry your service through production: on-call, incidents, and post-mortems.

Skills

Go

Java

Rust

C#

TypeScript

Job description

Maximum is building a core banking platform with a focus on correctness and end-to-end ownership of domain services. You will design, implement, and maintain schemas, APIs, workflows, tests, and related documentation from day one.

Expect to work with real environments, on-call duties, and collaboration with engineers and AI agents to drive reliable systems. You will contribute across services, reviewing PRs, translating messy inputs into robust data models, and ensuring durable production