Senior Software Developer (Go) - US Payments (Contract)

Form3; United States; Remote; USD 120,000 - 180,000; Part time

Job summary

Form3 is hiring Senior Software Developer contractors to join our US Payments engineering effort. You will design, build and test new Go services for high‑volume payments, contributing to resilient, cloud‑native infrastructure.

You’ll work on production‑grade features, collaborate across teams, and drive documentation, testing and operational readiness from design through production launch.

Qualifications

• Experience writing Go and building distributed systems for high‑volume, regulated environments.
• Strong track record of delivering reliable, production‑ready services and testing strategies.
• Familiarity with cloud platforms and container orchestration, plus CI/CD toolchains.

Responsibilities

• Design and implement US payments gateway functionality in Go with automated integration tests.
• Collaborate with Product and Engineering to refine requirements and validate implementations.
• Contribute to technical design, implementation plans and problem solving within Form3 platform architecture.
• Support resilience, performance, DR, failure‑mode testing and observability from development to production.
• Lead production‑readiness activities: release prep, validation, deployment and issue resolution.
• Produce and maintain design notes, testing docs, deployment guidance and runbooks.
• Ensure alignment with Form3 engineering standards and security requirements.

Skills

Go

Distributed systems

Cloud & containers

CI/CD

Test automation

Communication

Tools

Kubernetes

Terraform

Flux

GitHub

Prometheus

Pact.io

Tilt

Job description

THE PROJECT

Form3 is looking for several Senior Software Developer contractors to work alongside our US Software Engineering team to deliver new products within our US Payments proposition.

This is an opportunity to work on critical payments infrastructure in a highly technical environment, contributing to the design, build, testing and launch of new Zelle and Fedwire capabilities. You’ll be working in Go on Form3’s cloud-native platform, applying proven engineering patterns from our existing payments services while solving the specific challenges that come with high-volume, resilient, regulated payment systems.

• Design and implement new US payments gateway functionality in Go, aligned to product requirements and agreed technical architecture. This includes payment flows, scheme-specific behaviours, error handling, validation and operational requirements, as well as comprehensive automated integration tests covering this functionality.
• Work collaboratively with Product, Engineering and other functions to refine requirements and validate implementation choices.
• Contribute to technical design activity, including design proposals, implementation plans and problem-solving within Form3 platform architecture.
• Support non-functional requirements related to resilience, performance, disaster recovery, failure-mode testing and operational readiness. Establish and improve monitoring, alerting, telemetry and observability to support operational visibility from development through to production.
• Support production-readiness activity, including release preparation, final validation, production deployment and post-launch issue resolution.
• Produce and maintain technical documentation, including design notes, testing documentation, deployment guidance, operational procedures and runbooks.
• Ensure all work aligns with Form3’s engineering standards, security expectations and the standards required for critical payments infrastructure.

WE’RE LOOKING FOR

• Deep understanding of designing and building distributed systems
• Enjoys working on complex challenges within critical software where high performance and robustness are essential
• Familiarity with cloud and containerisation technologies, test automation tools and CI/CD pipelines
• Interest in owning projects end-to-end and supporting them as they go live in production
• Appreciation of clean code and software engineering best-practice
• Experience with Go, along with a “right tool for the job” mentality
• Great communication skills who enjoy sharing knowledge and collaborating with others

TECH STACK

Here are a few of the tools and methodologies we utilise:

• Infrastructure: AWS, GCP, Azure, Kubernetes
• Platform: CockroachDB, NATS JetStream, Elasticsearch, Vault, Cilium
• Tools: Terraform, Flux, GitHub, Prometheus, Pact.io, Tilt
• Code: Go (and a little Java), containerised microservices, CQRS, open source
• Ways of working: TDD/BDD, Pair Programming, 100% remote, SecDevOps

INTERVIEW PROCESS

Stage 1: Screening Call with Talent Team

Stage 2: Take home test

Stage 3: Technical interview (may be separated into two parts)

We always aim to stick to the above process, however there may be occasions when an additional interview stage is needed for us to be sure we’re hiring the right person!

LOCATIONS

Here are the locations that we are looking to engage with contractors from. Please note, we are not looking to engage with contractors outside of these locations.

• Canada (Ontario only)

All contractors start their first day in our office to collect the equipment needed to work remotely.

ABOUT FORM3

Revolutionising the world of payments with our cutting-edge technology and innovative solutions. For more information about Form3, check out the following pages:

What we do | Life at Form3 | Payments Cannot Fail Series | .Tech Podcast

OUR DEI&B COMMITMENT

We hire talented people from a variety of backgrounds and experiences and are committed to a work environment based on diversity, open-mindedness and curiosity. We’re united by our company values (we even created them together!) and we celebrate our unique differences.

Our employee lifecycle processes are designed to embrace equal opportunity and prevent discrimination against our people regardless of personal characteristics. It is our strong belief that the more inclusive and belonging we are as a business, the better our work will be.

As an inclusive employer, we guarantee to interview all neurodiverse and physically disabled applicants who meet the minimum criteria for this role. We also encourage candidates to notify us of any reasonable adjustments that may be required during the recruitment process. This includes providing job adverts in alternative, accessible formats or adjustments required at interview stage.

If you consider yourself to be neurodiverse or physically disabled under the UN definition of disability and would like to be considered under this scheme and/or require any reasonable adjustments please let us know by sending an email to clearly stating your consent for us to process this data.

For more information please refer to our Recruitment Data Policy.