Senior Software Engineer, Back End

Atomic; United States; Remote; USD 140,000 - 190,000; Full time

Job summary

Atomic Vest, a fast-growing remote-first financial infrastructure company, seeks an experienced senior backend engineer to design and build high-assurance services that move money and manage accounts.

You will own gRPC and REST APIs, work with Temporal, Kubernetes, AWS, and Datadog, and ensure determinism, idempotency, and robust testing across multi-tenant systems. A CS degree or equivalent is expected, with 8–10+ years in backend development.

Qualifications

• 8-10+ years of software development building and operating production backend systems.
• Computer Science degree or equivalent experience.
• Go, or deep experience in another statically typed language and willingness to learn Go.

Responsibilities

• Design, develop, and architect microservices and Temporal workflows for money movement, trading, and account lifecycle.
• Work with a cloud-native stack (Temporal, Kubernetes, Istio, AWS) and AI/automation tools.
• Make architectural decisions and improve testing, determinism, idempotency, and retryable behavior.
• Own gRPC services end-to-end in a multi-tenant platform and expose partner-facing REST APIs.
• Instrument services in Datadog with traces, dashboards, and monitors.
• Integrate with custodians, clearing systems, banking partners, and generate tax documents.

Skills

Backend development

Distributed systems

Go programming

Python knowledge

Education

Computer Science degree or equivalent experience

Tools

Kubernetes

AWS

gRPC

protobuf

Datadog

OpenTelemetry

Job description

About Atomic Vest

We are a fast-growing, mission-driven company powering the expansion of financial services and wealth creation, with billions of assets under management. We build critical financial infrastructure that allows consumer-facing companies to offer engaging investing experiences to their customers in a frictionless way. We host advanced investing capabilities ranging from ESG investing to multi-currency trading across 60 global markets. We are a team of financial empowerment enthusiasts who have come together from various industries including tech, banking, finance, and law.

At Atomic, with billions of dollars in assets under custody, you will help build services that help make it easier for ordinary individuals to secure their financial prosperity. Come join an exciting opportunity to make a lasting impact!

Location: Atomic is a remote company with offices in NYC and Mountain View, CA. For this position, it means that you can work remotely from any part of US / Canada.

Key Responsibilities:

• Play a key role in designing, developing, and architecting our microservices and Temporal workflows behind money movement, trading, and account lifecycle. Long-running state machines with real financial consequences are critical. Determinism, replay safety, idempotency, and other “retryable” challenges will be important aspects in your work.
• We are a technology-first company, leveraging a cloud-native technology stack (Temporal, Kubernetes, Istio, AWS), AI and automation tools and agents for development and testing.
• You make architectural decisions across a variety of systems and raise the bar on how we test these systems that must be correct.
• Own gRPC services end-to-end in a multi-tenant platform along with partner-facing REST APIs.
• Tackle really tough engineering and product problems and operate what you build. Instrument services in Datadog; own traces, dashboards, and monitors in your area.
• Build and debug integrations with custodians, clearing systems, banking partners, and calculate and generate tax documents.

Qualifications:

We are looking for candidates who are creative, autonomous, curious, and rigorous. Some things that may make you a great fit:

• 8-10+ years of software development building and operating production backend systems
• Computer Science degree or equivalent experience
• Go, or deep experience in another statically typed language plus genuine enthusiasm for picking it up
• Experience working on distributed systems where partial failures are expected (idempotency, exactly-once semantics, and reconciling against external sources and internal data are problems you have dealt with
• Experience in successful delivery of high-quality production services and systems: you’ve debugged from traces and logs, created postmortem documents and runbooks

Nice to have:

• Prior experience in the financial industry and comfort in a regulated environment
• Direct experience with Temporal or similar workflow engines where determinism, versioning, building fault-tolerant workflows, and a real sense of what belongs in an activity versus the workflow itself
• Experience with Datadog or comparable observability tooling, including building the dashboards and monitors
• Familiarity with gRPC and protobuf at scale
• Exposure to brokerage domain concepts such as clearing, settlement, corporate actions, KYC/AML, books and records.

Technology Stack

• Language: Go, Python
• Async systems: Temporal, River
• APIs: gRPC / protobuf, REST
• Data: PostgreSQL, Redis
• Infrastructure: Kubernetes (EKS), Istio, AWS
• Observability: Datadog
• PostgreSQL, AWS Kinesis, GRPC, Istio, OpenTelemetry

Atomic is an equal opportunity employer that values the benefits of diversity and prohibits discrimination and harassment All employment decisions at Atomic are based on business needs, job requirements and individual qualifications, without regard to age, race, color, religion or belief, stature, gender or sexual orientation, family or parental status, or any other status protected by the laws or regulations in the locations where we operate. Atomic will not tolerate discrimination or harassment based on any of these characteristics.

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