---
title: 'Elixir Product Engineer at Teller'
canonical: 'https://feeny.ai/job/elixir-product-engineer-teller-london-cr797z7b60zk'
type: 'job'
last_seen: '2026-09-14'
---

# Elixir Product Engineer at Teller

- **Company:** Teller
- **Location:** London, United Kingdom
- **Employment:** full-time
- **Work type:** hybrid
- **Posted:** 2019-09-24
- **Last confirmed live:** 2026-09-14
- **Apply:** https://jobs.lever.co/teller/dd21975a-901b-49ee-926c-336c92f8673d

## Job description

## About Teller

Teller builds APIs that enable developers to safely and reliably connect their apps with their users' financial accounts. We have a reputation for quality product and engineering excellence, and despite being relatively early stage we have some of the best fintechs in the world like Ramp, Brex, Pipe, and Capchase depending on our product.

Teller is backed by leading Silicon Valley investors such as Founders Fund, SciFi, Craft, and Lightspeed Venture Partners.

The Product Engineer Role Product Engineers are responsible for everything from building the dashboards, onboarding flows, and billing through to building the API itself and implementing new bank integrations alongside the Reverse Engineers on the Teller Red Team.

## About you

- You thrive in environments that afford you with high levels of responsibility and autonomy.
- You hold yourself and those you work with to high standards.
- You want to fulfil your potential to its fullest, grow as a developer and as a person to be the best you that you can be.
- You don’t look for excuses for why something can’t be done, you are the person who finds the way it can be done.
- If a skill that you don’t possess is required to complete a task you’re the kind of person who goes off and learns enough to get it done.
- You behave like an owner. You take total responsibility for what you work on and think of the bigger picture like a product manager would.
- You are results oriented and have a strong distaste for shaving yaks.
- You are a persuasive communicator. You are both succinct and direct. You are clear about what you are doing, why, and what you expect of others.
- You have strong opinions, weakly held, and the humility to change your mind according to the evidence as it presents itself.
- You have experience of shipping production applications written in Elixir or Erlang.

How to apply If Teller sounds interesting to you, please click the "Apply for this job" button below and fill out our short application form. We reply to every well considered application as quickly as we can. Our hiring process is as follows:

1. 30 minute Zoom call;
2. Take home Elixir test (2 week hard deadline)
3. CTO interview
4. Pairing session.

Competitive salary depending on experience and skillset, plus stock options.

## About Teller

## Company Overview
- **One-liner**: Teller provides an API that enables developers to connect their applications to users’ bank accounts for instant verification, balances, transactions, and payments.
- **Entity Type**: Private (Seed stage; $4M total funding)
- **Headquarters**: London, England, United Kingdom
- **Founded**: 2013
- **Founders**: Not publicly available

## Core Business
- Primary industry: Fintech / Banking APIs
- Target customers: B2B – fintech developers, neobanks, and any company needing bank account connectivity (e.g., lending, payments, personal finance apps)
- Mission or purpose: “The API for your bank account” – enabling reliable, real-time connections to over 7,000 financial institutions.

## Products & Services
- **Teller API**: RESTful API for account initiation, balance checking, transaction history, identity verification, and ACH payments. Includes SDKs for iOS, Android, and major languages.
- **Sidecar**: A zero-code migration tool that allows customers to switch from Plaid to Teller with a single line of configuration.
- **Bridge**: A product enabling Zelle payments for neobanks and non-bank fintechs.

## Market Standing
- **Valuation/Market Cap**: Not disclosed
- **Key Metric**: Annual Revenue $4M (estimated); Total Funding $4M (Seed round, January 2020)
- **Notable Investors/Partners**: 3 investors (names not publicly detailed); customers include Ramp, Brex, Pipe (per career page)
- **Growth Signals**: +8.7% headcount growth YoY; expanding product line (Bridge, Sidecar); 7,000+ supported institutions; 4 offices (London, San Francisco, others)

## Competitive Advantages
- **Reliability & Performance**: Claims more stable and predictable connections than alternatives (e.g., Plaid)
- **Developer Experience**: Simple API, comprehensive documentation, easy migration through Sidecar
- **Real-time Data**: Live balance and transaction data, plus Zelle payment capability
- **Fair Pricing**: Free developer tier (100 live connections) and transparent production pricing ($1.50 per verification)

## Strategic Focus
- **Bank Coverage Expansion**: Connecting to thousands of institutions and offering fallback microdeposit verification
- **Innovation in Payments**: Launching Bridge for Zelle to deepen payment capabilities
- **Enterprise Customization**: Offering custom pricing, co-branded consent screens, and bespoke solutions for large customers

## Why Work Here
- **Engineering Culture**: Small, tight-knit team (7 employees) with a reputation for product and engineering excellence. Technologies include Elixir and reverse engineering.
- **Work Policy**: Hybrid in London (Reverse Engineer, Elixir Product Engineer); On-site in Miami (Enterprise Account Executive)
- **Notable Perks**: Free developer tier; involvement in cutting-edge fintech APIs; direct impact on product direction
- **Growth Opportunity**: Join early-stage company with proven traction and ambitious roadmap

## Sources
1. [teller.io](https://teller.io/)
2. [uk.linkedin.com/company/teller-inc](https://uk.linkedin.com/company/teller-inc)
3. [craft.co/teller](https://craft.co/teller)
4. [theorg.com/org/teller-io](https://theorg.com/org/teller-io)
5. [jobera.com/employer/teller](https://jobera.com/employer/teller/)

## Other roles at Teller

- [Enterprise Account Executive](https://feeny.ai/job/enterprise-account-executive-teller-miami-8trfqa4b3fm6) — Miami, FL
- [Reverse Engineer](https://feeny.ai/job/reverse-engineer-teller-london-ramdwswrnajw) — London, United Kingdom