Currency

Founding Engineer

6 852 USDNet per month - B2B
Python

Founding Engineer

Python

Marszałkowska 107, Warszawa

CONTRACTSPOT

Full-time
B2B
Mid
Office
6 852 USD
Net per month - B2B

Tech stack

    Analytical Thinking

    master

    Algorithms

    master

    Python

    regular

    AI

    regular

    Databases

    regular

    ETL

    regular

    Cloud

    regular

Job description

Founding Engineer (AI + Platform) - ContractSpot


At ContractSpot, our mission is to tame the chaos of public procurement.


We’re turning bidding from a messy, high-risk process into an efficient, auditable, AI-assisted workflow - opening a €2T market to every company that should be able to compete.


We’re looking for a Founding Engineer to help build the core product: an AI-native procurement platform that becomes the system of record for tender work - for contractors today, and increasingly for contracting authorities tomorrow.


What you will do

  • Build the end-to-end procurement platform that becomes the workspace and data backbone for our customers: company profiles, documents, past bids, evidence, workflows, permissions, audit trails, integrations - everything needed to run procurement in one place.

  • Own the full tender lifecycle on our product - from notice ingestion/creation, through market & document data collection, to structured datasets and AI-driven execution (classification, extraction, eligibility checks, drafting, risk detection).

  • Develop the core intelligence of our AI engine, pushing what it can understand and automate in real procurement workflows (not demos): reliability, evaluation, guardrails, latency/cost, and continuous improvement loops.

  • Design collaborative workflows that help teams track opportunities, assign tasks, coordinate bid work, and reuse institutional knowledge - powered by historical tender/bid understanding (what worked, what failed, what’s missing, what’s risky).

  • Build towards the future state: a platform where contracting authorities create and manage tenders directly - enabling a cleaner market, better data, and faster, more transparent procurement.

  • Long-term: become a technical leader at ContractSpot - owning core systems, setting engineering standards, and helping build the team.


What we’re looking for

  • You’ve shipped production-grade systems end-to-end (backend + data + product thinking), and you care deeply about quality, performance, and maintainability.

  • Strong judgment in AI/ML + software engineering: you can make LLM systems reliable (data pipelines, retrieval, evals, monitoring, fallbacks), not just “it works on my machine.”

  • High agency: you can take an ambiguous problem, turn it into a plan, execute, and iterate quickly.

  • Relentless ownership: you don’t stop at “model output” - you deliver a feature customers trust in real workflows.


Nice to have: experience with B2B SaaS, workflow products, compliance/audit requirements, document-heavy domains (legal, finance, procurement), multi-tenant architecture, or security.



Why join us?

  • Do work that matters: use AI to improve how countries spend money - real GDP-level leverage.

  • Build at the frontier: an AI-native product designed from first principles, not retrofitted AI.

  • Exceptional team: engineers + legal talent building a generational company.

  • Early-stage leverage: your decisions will shape the product, culture, and architecture.


How to apply

Apply here - and (super important!) find me: Bartek (CTO) on LinkedIn and DM me so I know you read this line 🙂

Tech stack

    Analytical Thinking

    master

    Algorithms

    master

    Python

    regular

    AI

    regular

    Databases

    regular

    ETL

    regular

    Cloud

    regular

Office location

Published: 26.11.2025

About the company

CONTRACTSPOT

ContractSpot is a tendering platform designed for public procurement contractors, helping them easily find the best offers through advanced documentation analysis and intuitive guidance throughout the tendering process. ...

Company profile

Founding Engineer

6 852 USDNet per month - B2B
Summary of the offer

Founding Engineer

Marszałkowska 107, Warszawa

CONTRACTSPOT

6 852 USDNet per month - B2B
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