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

Posted 3 Days Ago
Be an Early Applicant
Hiring Remotely in London, GBR
In-Office or Remote
Senior level
Fintech • Payments • Financial Services
The Role
Senior contractor to design, build, test and launch US payments gateway functionality (Zelle, Fedwire) in Go on a cloud-native platform. Work includes designing distributed systems, implementing payment flows and error handling, writing automated integration tests, ensuring resilience/performance/operational readiness, improving observability, supporting production deployments, and producing technical documentation while collaborating with Product and Engineering.
Summary Generated by Built In

THE PROJECT 📝 

Form3 is looking for several Senior Software Engineer 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 [email protected] clearly stating your consent for us to process this data.

For more information please refer to our Recruitment Data Policy. 

Skills Required

  • Experience with Go
  • Deep understanding of designing and building distributed systems
  • Familiarity with cloud platforms (AWS, GCP, Azure) and containerization/Kubernetes
  • Experience with test automation and CI/CD pipelines (including automated integration tests)
  • Experience ensuring resilience, performance, disaster recovery and operational readiness for production systems
  • Experience building or working on high-volume, regulated payments or financial systems
  • Familiarity with observability, monitoring and alerting tooling (e.g., Prometheus)
  • Appreciation of clean code, software engineering best practices, and experience with TDD/BDD
  • Experience with Java (small amount)
  • Strong communication and collaboration skills
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The Company
HQ: London
458 Employees
Year Founded: 2016

What We Do

Form3 develop payment technology. We offer a fully managed, payment technology platform for Financial Institutions as-a-Service.Our vision is to be the worlds most trusted provider of payment technology.We design, build and run the technology that powers the future of payments.Historically, banking leaders believed that infrastructure technologies were an asset for their financial institution because they were managed locally and could be customised. Form3 is changing this model and offering payments infrastructure as a service. A fully cloud native platform that is fully managed to lower costs across operations, infrastructure, security, upgrades, and change management.Form3 has proven that there is a cheaper, simpler, and more efficient way for FI's to handle large payment volumes and scale dynamically without a heavy infrastructure burden. We enable FI’s to benefit from the flexibility, business agility and speed to market that an API-first platform brings along with embedded services that ensure they are always future-ready.Form3 work with regulated financial institutions including large Enterprise banks and digital challenger banks including Mastercard, Lloyds Banking Group, Ebury, LHV, PPS, N26, Square, Aion Bank and others.

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