AlignerrCoding & software eval
Senior Software Engineer (AI Infrastructure)
up to $100/hr
About this role, in Alignerr's words
What if your engineering skills could directly shape the platforms and systems behind the AI revolution? We're looking for Senior Software Engineers in Lisbon and across Portugal to design, build, and scale the infrastructure that powers cutting-edge AI products used by millions of people worldwide.
What you'll do
- Design, develop, and maintain production-grade software systems that support AI training, evaluation, and deployment pipelines
- Write clean, well-tested, and performant code in Python, TypeScript, or other modern languages
- Build and optimize APIs, data pipelines, and backend services that operate reliably at scale
Show all 8 itemsHide the other 5 in What you'll do
- Architect solutions that balance speed of delivery with long-term maintainability
- Troubleshoot complex technical issues across distributed systems and cloud infrastructure
- Collaborate asynchronously with cross-functional teams — including ML engineers, researchers, and product managers
- Participate in code reviews and contribute to engineering best practices across the team
- Work independently on well-scoped projects with meaningful ownership and autonomy
Candidate background
Who You Are
- 5+ years of professional software engineering experience
- Strong proficiency in at least one modern programming language — Python, TypeScript/JavaScript, Go, Java, or similar
- Solid understanding of software architecture, design patterns, and system design principles
- Experience building and deploying backend services, APIs, or data-intensive applications
- Comfortable working with cloud platforms (AWS, GCP, or Azure) and containerized environments
- Familiar with version control (Git), CI/CD workflows, and modern development tooling
- Strong debugging and problem-solving skills — you can navigate ambiguity and find root causes efficiently
- Excellent written communication skills — you can document decisions, explain tradeoffs, and collaborate effectively in an async-first environment
- Self-directed and reliable — you manage your own time and deliver consistently without close supervision
Nice to Have
Show all 6 itemsHide these 6 items in Nice to Have
- Experience with ML/AI infrastructure — training pipelines, model serving, data annotation platforms, or evaluation frameworks
- Familiarity with large-scale data processing tools (Spark, Kafka, Airflow, or similar)
- Background in distributed systems, microservices architecture, or event-driven design
- Experience with infrastructure-as-code (Terraform, Pulumi) or Kubernetes
- Contributions to open-source projects or a public portfolio of technical work
- Previous experience in a remote-first or async-heavy engineering culture
Quoted from selected sections of Alignerr's posting. The full posting may state other conditions. Read the full posting
A closer look
More context, when you need it.
Full job descriptionThe original posting, in Alignerr's words
Posted by Alignerr, reproduced here so you can judge the role before clicking. Original posting ↗
Senior Software Engineer (AI Infrastructure)
About the Role
What if your engineering skills could directly shape the platforms and systems behind the AI revolution? We're looking for Senior Software Engineers in Lisbon and across Portugal to design, build, and scale the infrastructure that powers cutting-edge AI products used by millions of people worldwide.
This is high-impact, technically challenging work — the kind that keeps great engineers engaged. You'll tackle real architectural problems, write code that matters, and collaborate with some of the sharpest minds in AI research and engineering.
This is a fully remote, flexible contract role. If you're an experienced engineer who thrives on autonomy, writes clean and scalable code, and wants to work at the frontier of technology — we want to hear from you.
- Organization: Alignerr - Type: Hourly Contract - Location: Remote - Commitment: 20–40 hours/week
What You'll Do
* Design, develop, and maintain production-grade software systems that support AI training, evaluation, and deployment pipelines * Write clean, well-tested, and performant code in Python, TypeScript, or other modern languages * Build and optimize APIs, data pipelines, and backend services that operate reliably at scale * Architect solutions that balance speed of delivery with long-term maintainability * Troubleshoot complex technical issues across distributed systems and cloud infrastructure * Collaborate asynchronously with cross-functional teams — including ML engineers, researchers, and product managers * Participate in code reviews and contribute to engineering best practices across the team * Work independently on well-scoped projects with meaningful ownership and autonomy
Who You Are
* 5+ years of professional software engineering experience * Strong proficiency in at least one modern programming language — Python, TypeScript/JavaScript, Go, Java, or similar * Solid understanding of software architecture, design patterns, and system design principles * Experience building and deploying backend services, APIs, or data-intensive applications * Comfortable working with cloud platforms (AWS, GCP, or Azure) and containerized environments * Familiar with version control (Git), CI/CD workflows, and modern development tooling * Strong debugging and problem-solving skills — you can navigate ambiguity and find root causes efficiently * Excellent written communication skills — you can document decisions, explain tradeoffs, and collaborate effectively in an async-first environment * Self-directed and reliable — you manage your own time and deliver consistently without close supervision
Nice to Have
* Experience with ML/AI infrastructure — training pipelines, model serving, data annotation platforms, or evaluation frameworks * Familiarity with large-scale data processing tools (Spark, Kafka, Airflow, or similar) * Background in distributed systems, microservices architecture, or event-driven design * Experience with infrastructure-as-code (Terraform, Pulumi) or Kubernetes * Contributions to open-source projects or a public portfolio of technical work * Previous experience in a remote-first or async-heavy engineering culture
Why Join Us
* Work on cutting-edge AI infrastructure alongside world-class research labs and engineering teams * Fully remote and flexible — set your own schedule and work from anywhere * Tackle genuinely hard technical problems with real-world impact at scale * High autonomy and ownership — no micromanagement, just meaningful engineering work * Collaborate with a global community of top-tier engineers and researchers * Potential for ongoing work, expanded scope, and long-term contract extension as projects grow
Working with AlignerrPay, getting started and work, from Alignerr's own pages
What the platform publishes in general. These are not extra terms confirmed for this particular role.
- Getting paid
- Billed weekly, Monday to Sunday, with approved work paid by the following Friday, according to Labelbox's help center. Payment goes through Stripe Connect or PayPal depending on your location, with one provider per country. intercom.help/labelbox/en/articles/13600616-alignerr-paym..., alignerr.com/process
- Before your first paid task
- Sign up, apply, verify your identity, set up billing and onboard. Some jobs add a Zara AI interview or domain assessments. alignerr.com/process
- How much work
- Time to your first project depends on demand and your skills, and there is no minimum number of hours. alignerr.com/faqs
- Contract
- Independent contractor, under terms with ALIGNERR LLC. alignerr.com/faqs, alignerr.com/privacy
Read on the pages linked above on 24 Sep 2026. Platforms change these terms, so check the linked page before you rely on one.
How does the pay compare?Across Coding & software eval roles, not this role alone
From our own daily reads of every open listing on the platforms we follow, not from Alignerr's posting. How we count.
Pay across the field: Coding & software eval
Across 393 roles in this field with a stated hourly rate in US dollars, on 14 platforms, the middle half pays $65 to $120 an hour at the top of the range, and the median is $95. This role's top rate, $100, is in the middle half. Of the 141 distinct rates we count, 73 are lower and 54 are higher.
| Platform | Roles | Top of range, per hour |
|---|---|---|
| Alignerr (this platform) | 136 | $50 to $400 · median $100 |
| micro1 | 46 | $35 to $350 · median $110 |
| Handshake AI | 43 | $47 to $125 · median $80 |
| Meridial (Invisible) | 34 | $22 to $150 · median $60 |
| Mercor | 33 | $60 to $200 · median $105 |
Sources and listing historyWhere this information comes from
This listing's history
- First seen here on 27 Aug 2026, and still on Alignerr's list when we last read it on 13 Oct 2026.
- The listed pay has not changed since then.
- Posted by Alignerr
- First seen by AIPayList
- Last seen live
- Listing ID
- 11695f13-77fd-4c2b-9eb5-6a90dd89c9b0
Pay as the source states it: “$20-100/hr”.
Platforms sometimes change a rate after posting. Every listing here is re-read at least once a day and corrected when its source moves, so a difference you see on the platform is usually a change made since the last read. How freshness works.
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